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This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 9,128 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":13011,"source":{"system":"sec-edgar","filing":"0001193125-26-232613","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232613/ownership.xml","form_type":"4"}},{"id":770102,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45689,"kind":"person","name":"Holbrook Richard Edward","position":1,"cik":"0001826025","reported_name":"Holbrook Richard Edward","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:19.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 66,195 shares of common stock; (ii) 196,500 shares held in joint tenancy with spouse; (iii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iv) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":278998,"source":{"system":"sec-edgar","filing":"0001193125-26-232611","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232611/ownership.xml","form_type":"4"}},{"id":770103,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45690,"kind":"person","name":"Harlam Bari A","position":1,"cik":"0001801854","reported_name":"Harlam Bari A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:18.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 65,664 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":81967,"source":{"system":"sec-edgar","filing":"0001193125-26-232610","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232610/ownership.xml","form_type":"4"}},{"id":770101,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45688,"kind":"person","name":"Palandjian Leon Aghababai","position":1,"cik":"0001713799","reported_name":"Palandjian Leon Aghababai","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:16.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 95,678 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":99561,"source":{"system":"sec-edgar","filing":"0001193125-26-232607","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232607/ownership.xml","form_type":"4"}},{"id":770100,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45687,"kind":"person","name":"Bane Richard Corey","position":1,"cik":"0001825604","reported_name":"Bane Richard Corey","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:14.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 186,195 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":202498,"source":{"system":"sec-edgar","filing":"0001193125-26-232609","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232609/ownership.xml","form_type":"4"}},{"id":770099,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45686,"kind":"person","name":"HARNEY MARISA","position":1,"cik":"0001741460","reported_name":"HARNEY MARISA","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:12.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 8,868 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":12751,"source":{"system":"sec-edgar","filing":"0001193125-26-232608","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232608/ownership.xml","form_type":"4"}},{"id":770098,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45685,"kind":"person","name":"Zelleke Andargachew S","position":1,"cik":"0001551230","reported_name":"Zelleke Andargachew S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:11.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 9,712 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":13595,"source":{"system":"sec-edgar","filing":"0001193125-26-232606","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232606/ownership.xml","form_type":"4"}},{"id":770097,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45684,"kind":"person","name":"Sullivan Michael James","position":1,"cik":"0001676055","reported_name":"Sullivan Michael James","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:09.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 128,323 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":132206,"source":{"system":"sec-edgar","filing":"0001193125-26-232605","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232605/ownership.xml","form_type":"4"}},{"id":770096,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":45683,"kind":"person","name":"Williams Linda Marie","position":1,"cik":"0001932695","reported_name":"Williams Linda Marie","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:08.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 8,868 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":12751,"source":{"system":"sec-edgar","filing":"0001193125-26-232604","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232604/ownership.xml","form_type":"4"}},{"id":770095,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":19517,"kind":"person","name":"CASEY JOSEPH F","position":1,"cik":"0001221397","reported_name":"CASEY JOSEPH F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:06.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."}],"balance_after":3883,"source":{"system":"sec-edgar","filing":"0001193125-26-232603","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232603/ownership.xml","form_type":"4"}},{"id":770094,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":36789,"kind":"person","name":"Jackson Deborah C","position":1,"cik":"0001447057","reported_name":"Jackson Deborah C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:04.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 59,036 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":75339,"source":{"system":"sec-edgar","filing":"0001193125-26-232602","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232602/ownership.xml","form_type":"4"}},{"id":770090,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":31713,"kind":"person","name":"Borgen Luis","position":1,"cik":"0001488660","reported_name":"Borgen Luis","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:15:03.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":3883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 7,591 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4."}],"balance_after":23894,"source":{"system":"sec-edgar","filing":"0001193125-26-232600","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526232600/ownership.xml","form_type":"4"}},{"id":853642,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":10067,"kind":"person","name":"Rosato R David","position":1,"cik":"0001605452","reported_name":"Rosato R David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-09T20:15:06.000Z","date":"2026-03-06","kind":"purchase","planned":false,"acquired":true,"shares":5000,"price":18.45,"value":92250.0,"ownership":{"direct":false,"nature":"By Spouse in Trust"},"balance_after":50000,"source":{"system":"sec-edgar","filing":"0001193125-26-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526098529/ownership.xml","form_type":"4"}},{"id":853641,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":10067,"kind":"person","name":"Rosato R David","position":1,"cik":"0001605452","reported_name":"Rosato R David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-09T20:15:06.000Z","date":"2026-03-05","kind":"purchase","planned":false,"acquired":true,"shares":5000,"price":19.17,"value":95850.0,"ownership":{"direct":false,"nature":"By Spouse in Trust"},"balance_after":45000,"source":{"system":"sec-edgar","filing":"0001193125-26-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526098529/ownership.xml","form_type":"4"}},{"id":858727,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":10066,"kind":"person","name":"SHEAHAN DENIS K","position":1,"cik":"0001207221","reported_name":"SHEAHAN DENIS K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2026-03-05T23:13:43.000Z","date":"2026-03-03","kind":"exercise","planned":false,"acquired":false,"shares":34065,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Restricted stock units convert into common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"On March 3, 2025, the reporting person was granted 154,088 restricted stock units of which 24,365 vest in three equal annual installments beginning March 3, 2026 after market close, and 129,723 vest in five equal installments beginning on March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"On March 3, 2025, the reporting person was granted 154,088 restricted stock units of which 24,365 vest in three equal annual installments beginning March 3, 2026 after market close, and 129,723 vest in five equal installments beginning on March 3, 2026, after market close, subject to continued service. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"On March 3, 2025, the reporting person was granted 33,671 restricted stock units that vest in three equal annual installments beginning March 3, 2026, after market close, subject to continued service. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"On March 3, 2025, the reporting person was granted 33,163 restricted stock units of which 4,963 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date."}],"balance_after":31509,"derivative":{"underlying":"Common stock","underlying_shares":1654},"source":{"system":"sec-edgar","filing":"0001193125-26-094134","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1825588/000119312526094134/ownership.xml","form_type":"4"}},{"id":859611,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":449,"kind":"person","name":"Antonakes Steven Louis","position":1,"cik":"0001825588","reported_name":"Antonakes Steven Louis","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive VP"}}],"security":"Common Stock","published_at":"2026-03-05T21:44:12.000Z","date":"2026-03-03","kind":"tax_withholding","planned":false,"acquired":false,"shares":486,"price":19.45,"value":9452.7,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 920 common shares. The understatement was the net effect of two clerical errors. The first was an understatement of 20 shares in the disclosure of directly owned shares disposed of for tax withholding, resulting in an overstatement of 20 shares beneficially owned.  To clarify, the Form 4 filed on March 3, 2026 should have disclosed that a total of 3,955 directly owned shares were disposed of for tax withholding (not 3,935 shares). The second clerical error was the omission of 940 directly held shares that had been previously been reported as acquired. The net of these transactions was an understatement of 920 common shares. 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The understatement was the net effect of two clerical errors. The first was an understatement of 20 shares in the disclosure of directly owned shares disposed of for tax withholding, resulting in an overstatement of 20 shares beneficially owned.  To clarify, the Form 4 filed on March 3, 2026 should have disclosed that a total of 3,955 directly owned shares were disposed of for tax withholding (not 3,935 shares). The second clerical error was the omission of 940 directly held shares that had been previously been reported as acquired. The net of these transactions was an understatement of 920 common shares. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 3, 2025, the reporting person was granted 4,903 restricted stock units that vest in three equal annual installments beginning March 3, 2026, subject to continued service. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"On March 3, 2025, the reporting person was granted 34,697 restricted stock units of which 6,497 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date."}],"balance_after":32532,"derivative":{"underlying":"Common stock","underlying_shares":2165},"source":{"system":"sec-edgar","filing":"0001193125-26-094109","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1825659/000119312526094109/ownership.xml","form_type":"4"}},{"id":858771,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":1694,"kind":"person","name":"Henry Kathleen Cloherty","position":1,"cik":"0001825659","reported_name":"Henry Kathleen Cloherty","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive VP, General Counsel"}}],"security":"Common Stock","published_at":"2026-03-05T16:38:28.000Z","date":"2026-03-03","kind":"tax_withholding","planned":false,"acquired":false,"shares":961,"price":19.45,"value":18691.45,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 16,961 common shares. The understatement was the effect of a clerical error as the calculation omitted 16,961 directly held shares that were acquired on March 1, 2026 and reported on prior Form 4s. 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The understatement was the effect of a clerical error as the calculation omitted 16,961 directly held shares that were acquired on March 1, 2026 and reported on prior Form 4s. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F11","text":"On March 2, 2026, the reporting person was granted 24,340 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date."}],"balance_after":24340,"derivative":{"underlying":"Common stock","underlying_shares":24340},"source":{"system":"sec-edgar","filing":"0001193125-26-088960","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526088960/ownership.xml","form_type":"4"}},{"id":867945,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":10066,"kind":"person","name":"SHEAHAN DENIS K","position":1,"cik":"0001207221","reported_name":"SHEAHAN DENIS K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-03-03T23:01:22.000Z","date":"2025-09-16","kind":"sale","planned":false,"acquired":false,"shares":1,"price":13.85,"value":13.85,"ownership":{"direct":false,"nature":"By IRA"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F12","text":"Sale of fractional shares by transfer agent in connection with the transfer of shares to a brokerage account."}],"balance_after":33305,"source":{"system":"sec-edgar","filing":"0001193125-26-088960","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1810546/000119312526088960/ownership.xml","form_type":"4"}},{"id":867944,"issuer":{"id":448,"kind":"organization","name":"Eastern Bankshares, Inc.","symbol":"EBC"},"owners":[{"id":62581,"kind":"person","name":"Miller Quincy Lee","position":1,"cik":"0001825603","reported_name":"Miller Quincy Lee","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Restricted Stock Units","published_at":"2026-03-03T22:55:28.000Z","date":"2026-03-02","kind":"grant","planned":false,"acquired":true,"shares":15162,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"On March 2, 2026, the reporting person was granted 15,162 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"On March 2, 2026, the reporting person was granted 15,162 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. 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Vested shares will be issued to the reporting person as soon as practicable after the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 1, 2022, the reporting person was granted 71,157 restricted stock units that vest in five equal annual installments beginning March 1, 2023, subject to continued service. 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(the \"Company\") common stock, par value $0.01 per share (\"Common Stock\") received upon vesting of a performance restricted stock unit (\"PRSU\") award eligible to vest based upon the Company's performance on total shareholder return (\"TSR\") measured at the end of the three-year performance period of January 1, 2023 through December 31, 2025 (the \"Performance Period\") relative to TSR performance over that performance period of the banks listed on the KBW Nasdaq Regional Banking Index (the \"TSR Measure\").  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