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Shares will be delivered to the reporting person on the date when the reporting person experiences a separation from service with Cullen/Frost Bankers, Inc."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The deferred stock units vested on April 26, 2023.  Shares will be delivered to the reporting person on the date when the reporting person experiences a separation from service with Cullen/Frost Bankers, Inc."}],"balance_after":9382,"derivative":{"underlying":"Common Stock","underlying_shares":773},"source":{"system":"sec-edgar","filing":"0001209191-23-025971","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/39263/000120919123025971/doc4.xml","form_type":"4"}},{"id":2288486,"issuer":{"id":3533,"kind":"organization","name":"CULLEN/FROST BANKERS, INC."},"owners":[{"id":114118,"kind":"person","name":"ALVAREZ CARLOS","position":1,"cik":"0001188022","reported_name":"ALVAREZ CARLOS","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Deferred Stock Units","published_at":"2022-04-29T19:00:19.000Z","date":"2022-04-27","kind":"grant","acquired":true,"shares":598,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each deferred stock unit represents the right to receive one share of Cullen/Frost Bankers, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The deferred stock units vested on April 27, 2022.  Shares will be delivered to the reporting person on the date when the reporting person experiences a separation from service with Cullen/Frost Bankers, Inc."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The deferred stock units vested on April 27, 2022.  Shares will be delivered to the reporting person on the date when the reporting person experiences a separation from service with Cullen/Frost Bankers, Inc."}],"balance_after":8609,"derivative":{"underlying":"Common Stock","underlying_shares":598},"source":{"system":"sec-edgar","filing":"0001209191-22-026193","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/39263/000120919122026193/doc4.xml","form_type":"4"}},{"id":2736786,"issuer":{"id":3533,"kind":"organization","name":"CULLEN/FROST BANKERS, INC."},"owners":[{"id":114118,"kind":"person","name":"ALVAREZ CARLOS","position":1,"cik":"0001188022","reported_name":"ALVAREZ CARLOS","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Deferred Stock Units","published_at":"2021-04-29T21:44:58.000Z","date":"2021-04-28","kind":"grant","acquired":true,"shares":594,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each deferred stock unit represents the right to receive one share of Cullen/Frost Bankers, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The deferred stock units vested on April 28, 2021.  Shares will be delivered to the reporting person on the date when the reporting person experiences a separation from service with Cullen/Frost Bankers, Inc."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The deferred stock units vested on April 28, 2021.  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The prices actually paid range from $106.97 to $107.69.  The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range."}],"balance_after":294000,"source":{"system":"sec-edgar","filing":"0001209191-21-014663","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/39263/000120919121014663/doc4.xml","form_type":"4"}},{"id":2842381,"issuer":{"id":3533,"kind":"organization","name":"CULLEN/FROST BANKERS, INC."},"owners":[{"id":114118,"kind":"person","name":"ALVAREZ CARLOS","position":1,"cik":"0001188022","reported_name":"ALVAREZ CARLOS","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value","published_at":"2021-02-23T16:58:50.000Z","date":"2021-02-22","kind":"sale","acquired":false,"shares":40000,"price":105.04,"value":4201600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is based on a weighted average price.  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The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range."}],"balance_after":334000,"source":{"system":"sec-edgar","filing":"0001209191-21-013078","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/39263/000120919121013078/doc4.xml","form_type":"4"}},{"id":2852957,"issuer":{"id":3533,"kind":"organization","name":"CULLEN/FROST BANKERS, INC."},"owners":[{"id":114118,"kind":"person","name":"ALVAREZ CARLOS","position":1,"cik":"0001188022","reported_name":"ALVAREZ CARLOS","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value","published_at":"2021-02-18T21:42:44.000Z","date":"2021-02-17","kind":"sale","acquired":false,"shares":40000,"price":102.36,"value":4094400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is based on a weighted average price.  The prices actually paid range from $102.23 to $102.62.  The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range."}],"balance_after":374000,"source":{"system":"sec-edgar","filing":"0001209191-21-011883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/39263/000120919121011883/doc4.xml","form_type":"4"}},{"id":2868248,"issuer":{"id":3533,"kind":"organization","name":"CULLEN/FROST BANKERS, INC."},"owners":[{"id":114118,"kind":"person","name":"ALVAREZ CARLOS","position":1,"cik":"0001188022","reported_name":"ALVAREZ CARLOS","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value","published_at":"2021-02-11T21:36:49.000Z","date":"2021-02-09","kind":"sale","acquired":false,"shares":40000,"price":99.12,"value":3964800.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is based on a weighted average price.  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