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Commitments and Contingencies - Schedule of Total Unfunded Commitments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Commitment And Contingencies [Line Items] |  |
Total unfunded commitments | $ 1,810,100 | $ 2,008,337
Unfunded loan commitment reserves [Member] |  |
Commitment And Contingencies [Line Items] |  |
Total unfunded commitments | 885,416 | 1,124,942
Credit Card Lines of Credit [Member] |  |
Commitment And Contingencies [Line Items] |  |
Total unfunded commitments | 6,888 | 7,167
Unfunded Commitment Line Of Credit [Member] |  |
Commitment And Contingencies [Line Items] |  |
Total unfunded commitments | 907,916 | 862,369
Commercial And Standby Letters Of Credit [Member] |  |
Commitment And Contingencies [Line Items] |  |
Total unfunded commitments | $ 9,880 | $ 13,859

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