{"transactions":[{"id":684892,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":8875,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":59245,"derivative":{"underlying":"Common Stock","underlying_shares":8875},"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":684891,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":8875,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 8,875 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":506387,"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":684890,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":12755,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":515262,"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":966834,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-12-17T21:51:23.000Z","date":"2025-12-15","kind":"gift","planned":false,"acquired":false,"shares":15232,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction includes the reporting person's gift of 12,800 shares of the issuer's stock to the Dueser Foundation and 2,432 shares to family members. The reporting person no longer has any beneficial ownership or pecuniary interest in such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":502507,"source":{"system":"sec-edgar","filing":"0001193125-25-322880","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312525322880/ownership.xml","form_type":"4"}},{"id":1063368,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Deferred Stock Units","published_at":"2025-08-19T20:09:03.000Z","date":"2025-08-16","kind":"grant","planned":false,"acquired":true,"shares":3464,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":50370,"derivative":{"underlying":"Common Stock","underlying_shares":3464},"source":{"system":"sec-edgar","filing":"0000950170-25-110097","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025110097/ownership.xml","form_type":"4"}},{"id":1063367,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-08-19T20:09:03.000Z","date":"2025-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":3464,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 3,464 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":517739,"source":{"system":"sec-edgar","filing":"0000950170-25-110097","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025110097/ownership.xml","form_type":"4"}},{"id":1064884,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Deferred Stock Units","published_at":"2025-08-18T19:40:51.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":4757,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":46906,"derivative":{"underlying":"Common Stock","underlying_shares":4757},"source":{"system":"sec-edgar","filing":"0000950170-25-109675","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109675/ownership.xml","form_type":"4"}},{"id":1064883,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-08-18T19:40:51.000Z","date":"2025-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":4757,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 4,757  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":521203,"source":{"system":"sec-edgar","filing":"0000950170-25-109675","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109675/ownership.xml","form_type":"4"}},{"id":1064882,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-08-18T19:40:51.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":12352,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":525960,"source":{"system":"sec-edgar","filing":"0000950170-25-109675","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109675/ownership.xml","form_type":"4"}},{"id":1192988,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Deferred Stock Units","published_at":"2025-03-25T20:20:18.000Z","date":"2025-03-21","kind":"grant","planned":false,"acquired":true,"shares":15591,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."}],"balance_after":42149,"derivative":{"underlying":"Common Stock","underlying_shares":15591},"source":{"system":"sec-edgar","filing":"0000950170-25-044414","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044414/ownership.xml","form_type":"4"}},{"id":1192987,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-03-25T20:20:18.000Z","date":"2025-03-21","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":15591,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":513608,"source":{"system":"sec-edgar","filing":"0000950170-25-044414","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044414/ownership.xml","form_type":"4"}},{"id":1192986,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-03-25T20:20:18.000Z","date":"2025-03-21","kind":"grant","planned":false,"acquired":true,"shares":15591,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":529199,"source":{"system":"sec-edgar","filing":"0000950170-25-044414","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044414/ownership.xml","form_type":"4"}},{"id":1304768,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2025-01-13T18:46:29.000Z","date":"2025-01-09","kind":"gift","planned":false,"acquired":false,"shares":433992,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Mr. Dueser previously contributed shares of First Financial Bankshares, Inc. common stock to a grantor retained annuity trust for the benefit of himself and his three adult children. Upon termination of the trust on January 9, 2024, 144,664 shares were transferred to each of the reporting person's children. Mr. Dueser no longer has any beneficial ownership or pecuniary interest in such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":513608,"source":{"system":"sec-edgar","filing":"0000950170-25-004725","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025004725/ownership.xml","form_type":"4"}},{"id":1331780,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-12-16T17:09:37.000Z","date":"2024-12-12","kind":"sale","planned":false,"acquired":false,"shares":25000,"price":40.73,"value":1018250.0,"ownership":{"direct":false,"nature":"By Partnership"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"The sale of the shares was made as part of the family limited partnership's diversification plan in connection with the manager's fiduciary obligations."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares that are owned by a family limited partnership of which Mr. Dueser serves as manager of the general partner and to which he disclaims beneficial ownership with respect to 353,253 shares. This report should not be deemed an admission that Mr. Dueser is the beneficial owner of these shares for purposes of Section 16 or any other purpose."}],"balance_after":471004,"source":{"system":"sec-edgar","filing":"0000950170-24-136478","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024136478/ownership.xml","form_type":"4"}},{"id":1331779,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-12-16T17:09:37.000Z","date":"2024-12-12","kind":"gift","planned":false,"acquired":false,"shares":11000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction involved the reporting person's gift of 11,000 shares of the issuer's stock to the Dueser Foundation. The reporting person no longer has any beneficial ownership or pecuniary interest in such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":947600,"source":{"system":"sec-edgar","filing":"0000950170-24-136478","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024136478/ownership.xml","form_type":"4"}},{"id":1428571,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Deferred Stock Units","published_at":"2024-08-20T21:04:20.000Z","date":"2024-08-16","kind":"grant","planned":false,"acquired":true,"shares":6736,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."}],"balance_after":26558,"derivative":{"underlying":"Common Stock","underlying_shares":6736},"source":{"system":"sec-edgar","filing":"0000950170-24-099197","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024099197/ownership.xml","form_type":"4"}},{"id":1428570,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-08-20T21:04:20.000Z","date":"2024-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":6736,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":958600,"source":{"system":"sec-edgar","filing":"0000950170-24-099197","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024099197/ownership.xml","form_type":"4"}},{"id":1433236,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2024-08-15T15:46:05.000Z","date":"2024-08-14","kind":"grant","planned":false,"acquired":true,"shares":24623,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year."}],"balance_after":24623,"derivative":{"exercise_price":34.37,"expiration_date":"2034-08-14","underlying":"Common Stock","underlying_shares":24623},"source":{"system":"sec-edgar","filing":"0000950170-24-097437","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024097437/ownership.xml","form_type":"4"}},{"id":1433235,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-08-15T15:46:05.000Z","date":"2024-08-14","kind":"grant","planned":false,"acquired":true,"shares":14271,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":965336,"source":{"system":"sec-edgar","filing":"0000950170-24-097437","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024097437/ownership.xml","form_type":"4"}},{"id":1444982,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-08-01T21:31:19.000Z","date":"2024-07-30","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":40000,"price":38.31,"value":1532400.0,"ownership":{"direct":false,"nature":"By Partnership"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction was executed for financial planning purposes."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares that are owned by a family limited partnership of which Mr. Dueser serves as manager of the general partner and to which he disclaims beneficial ownership with respect to 291,125 shares. This report should not be deemed an admission that Mr. Dueser is the beneficial owner of these shares for purpose of Section 16 or any other purpose."}],"balance_after":408310,"source":{"system":"sec-edgar","filing":"0000950170-24-089462","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024089462/ownership.xml","form_type":"4"}},{"id":1566770,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Deferred Stock Units","published_at":"2024-03-20T19:58:31.000Z","date":"2024-03-18","kind":"grant","planned":false,"acquired":false,"shares":9814,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."}],"balance_after":19822,"derivative":{"underlying":"Common Stock","underlying_shares":9814},"source":{"system":"sec-edgar","filing":"0001209191-24-004978","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919124004978/doc4.xml","form_type":"4"}},{"id":1566769,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-03-20T19:58:31.000Z","date":"2024-03-18","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":9814,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on March 18, 2024, of 9,814 performance stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 9,814 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 9,814 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 9,814 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":951065,"source":{"system":"sec-edgar","filing":"0001209191-24-004978","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919124004978/doc4.xml","form_type":"4"}},{"id":1566768,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2024-03-20T19:58:31.000Z","date":"2024-03-18","kind":"grant","planned":false,"acquired":true,"shares":9814,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":960879,"source":{"system":"sec-edgar","filing":"0001209191-24-004978","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919124004978/doc4.xml","form_type":"4"}},{"id":1637024,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Employee Stock Option, Right to 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CEO"}}],"security":"Common Stock","published_at":"2024-02-20T21:25:17.000Z","date":"2024-02-20","kind":"exercise","planned":false,"acquired":true,"shares":20000,"price":21.18,"value":423600.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":951065,"source":{"system":"sec-edgar","filing":"0001209191-24-003512","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919124003512/doc4.xml","form_type":"4"}},{"id":1710527,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F 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The reporting person no longer has any beneficial ownership or pecuniary interest in such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":931065,"source":{"system":"sec-edgar","filing":"0001209191-23-058725","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919123058725/doc4.xml","form_type":"4"}},{"id":1710526,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2023-12-15T15:34:24.000Z","date":"2023-12-14","kind":"gift","planned":false,"acquired":false,"shares":2364,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":949851,"source":{"system":"sec-edgar","filing":"0001209191-23-058725","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919123058725/doc4.xml","form_type":"4"}},{"id":1753664,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2023-10-31T20:42:27.000Z","date":"2023-10-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":653,"price":23.66,"value":15449.98,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 653 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":952215,"source":{"system":"sec-edgar","filing":"0001209191-23-053951","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919123053951/doc4.xml","form_type":"4"}},{"id":1802644,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Deferred Stock Units","published_at":"2023-08-18T20:37:29.000Z","date":"2023-08-16","kind":"grant","planned":false,"acquired":true,"shares":6736,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,271 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,271 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,271 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,271 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."}],"balance_after":10008,"derivative":{"underlying":"Common Stock","underlying_shares":6736},"source":{"system":"sec-edgar","filing":"0001209191-23-046568","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919123046568/doc4.xml","form_type":"4"}},{"id":1802643,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2023-08-18T20:37:29.000Z","date":"2023-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":3465,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,465 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":952868,"source":{"system":"sec-edgar","filing":"0001209191-23-046568","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919123046568/doc4.xml","form_type":"4"}},{"id":1802642,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2023-08-18T20:37:29.000Z","date":"2023-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":3271,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Dueser is therefore reporting the disposition of 3,271 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). 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Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 1,210 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":940257,"source":{"system":"sec-edgar","filing":"0001209191-22-055625","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919122055625/doc4.xml","form_type":"4"}},{"id":2132091,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES 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The restricted stock vests\n33 1/3% at the end of one year, 66 2/3% at the end of two years, and 100% at the end of three years."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":400854,"source":{"system":"sec-edgar","filing":"0001209191-18-056122","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919118056122/doc4.xml","form_type":"4"}},{"id":3904293,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2018-06-06T18:03:52.000Z","date":"2018-06-05","kind":"exercise","acquired":false,"shares":4000,"price":15.73,"value":62920.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":15.73,"exercise_date":"2017-10-25","expiration_date":"2021-10-25","underlying":"Common Stock","underlying_shares":4000},"source":{"system":"sec-edgar","filing":"0001209191-18-036024","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919118036024/doc4.xml","form_type":"4"}},{"id":3904292,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2018-06-06T18:03:52.000Z","date":"2018-06-05","kind":"exercise","acquired":false,"shares":5000,"price":30.85,"value":154250.0,"ownership":{"direct":true},"balance_after":10000,"derivative":{"exercise_price":30.85,"exercise_date":"2017-10-22","expiration_date":"2023-10-22","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-18-036024","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919118036024/doc4.xml","form_type":"4"}},{"id":3904291,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2018-06-06T18:03:52.000Z","date":"2018-06-05","kind":"exercise","acquired":true,"shares":4000,"price":15.73,"value":62920.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":398143,"source":{"system":"sec-edgar","filing":"0001209191-18-036024","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919118036024/doc4.xml","form_type":"4"}},{"id":3904290,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2018-06-06T18:03:52.000Z","date":"2018-06-05","kind":"exercise","acquired":true,"shares":5000,"price":30.85,"value":154250.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":394143,"source":{"system":"sec-edgar","filing":"0001209191-18-036024","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919118036024/doc4.xml","form_type":"4"}},{"id":4132854,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-12-14T21:05:27.000Z","date":"2017-12-14","kind":"other","acquired":false,"shares":0,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On December 15, 2017, Mr. Dueser gifted partnership interests (in the form of units) to three trusts: Trust I, Trust II and Trust III (together, the \"Trusts\") of which he is not the beneficiary. Although Mr. Dueser gifted partnership interests to the Trusts, the number of shares beneficially owned by the partnership remains unchanged. The gifting of the partnership interests, however, decreased Mr. Dueser's pecuniary interests in the shares held by the partnership due to the decrease in his overall interests in the partnership. Accordingly, while the gifting of the partnership interests to the Trusts constitutes a disposition by Mr. Dueser, the amount and price of the shares involved in the disposition are not applicable."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On December 15, 2017, Mr. Dueser gifted partnership interests (in the form of units) to three trusts: Trust I, Trust II and Trust III (together, the \"Trusts\") of which he is not the beneficiary. Although Mr. Dueser gifted partnership interests to the Trusts, the number of shares beneficially owned by the partnership remains unchanged. The gifting of the partnership interests, however, decreased Mr. Dueser's pecuniary interests in the shares held by the partnership due to the decrease in his overall interests in the partnership. Accordingly, while the gifting of the partnership interests to the Trusts constitutes a disposition by Mr. Dueser, the amount and price of the shares involved in the disposition are not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares owned by a limited liability company (\"LLC\") of which Mr. Dueser is the manager and sole member, which serves as the general partner of a limited partnership referred to in footnote 3 above."}],"balance_after":224155,"source":{"system":"sec-edgar","filing":"0001209191-17-065653","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117065653/doc4.xml","form_type":"4"}},{"id":4180957,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-10-25T19:04:53.000Z","date":"2017-10-24","kind":"grant","acquired":true,"shares":3250,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 24,2017, First Financial Bankshares, Inc. granted the reporting person restricted stock totaling 3,250 shares.  The restricted stock vests\n33 1/3% at the end of one year, 66 2/3% at the end of two years, and 100% at the end of three years."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":389143,"source":{"system":"sec-edgar","filing":"0001209191-17-057919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117057919/doc4.xml","form_type":"4"}},{"id":4236145,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-08-14T19:51:04.000Z","date":"2017-08-14","kind":"purchase","acquired":true,"shares":307,"price":41.45,"value":12725.15,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":385893,"source":{"system":"sec-edgar","filing":"0001209191-17-048736","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117048736/doc4.xml","form_type":"4"}},{"id":4236144,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-08-14T19:51:04.000Z","date":"2017-08-14","kind":"purchase","acquired":true,"shares":168,"price":41.4,"value":6955.2,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":385586,"source":{"system":"sec-edgar","filing":"0001209191-17-048736","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117048736/doc4.xml","form_type":"4"}},{"id":4280247,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2017-06-16T21:00:51.000Z","date":"2017-06-12","kind":"grant","acquired":true,"shares":50000,"price":42.35,"value":2117500.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On June 12, 2017, First Financial Bankshares, Inc. granted the reporting person options to purchase 50,000 shares of the Company's common stock at $42.35 per share.  The options vest 20% at the end of two years, 40% at the end of three years, 60% at the end of four years, 80% at the end of five years and 100% at the end of six years."}],"balance_after":50000,"derivative":{"exercise_price":42.35,"exercise_date":"2019-06-12","expiration_date":"2027-06-12","underlying":"Common Stock","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001209191-17-040581","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117040581/doc4.xml","form_type":"4"}},{"id":4286629,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and 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SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-06-12T18:50:56.000Z","date":"2017-06-12","kind":"exercise","acquired":true,"shares":4000,"price":15.73,"value":62920.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":385418,"source":{"system":"sec-edgar","filing":"0001209191-17-039086","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117039086/doc4.xml","form_type":"4"}},{"id":4286626,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2017-06-12T18:50:56.000Z","date":"2017-06-12","kind":"exercise","acquired":true,"shares":10000,"price":30.85,"value":308500.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"In January, 2017, one of the Trusts above distributed 20,275 shares to the Limited Liability Company, both of which Mr. Dueser is the beneficiary."}],"balance_after":381418,"source":{"system":"sec-edgar","filing":"0001209191-17-039086","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919117039086/doc4.xml","form_type":"4"}},{"id":4573861,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President and CEO"}}],"security":"Common Stock","published_at":"2016-10-27T18:41:09.000Z","date":"2016-10-25","kind":"grant","acquired":true,"shares":4127,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 25,2016, First Financial Bankshares, Inc. granted the reporting person restricted stock totaling 4,127 shares.  The restricted stock vests\n33 1/3% at the end of one year, 66 2/3% at the end of two years, and 100% at the end of three years."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary."}],"balance_after":391693,"source":{"system":"sec-edgar","filing":"0001209191-16-147094","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000120919116147094/doc4.xml","form_type":"4"}}]}