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Shareholders' Equity and Other Comprehensive Income - Schedule of Activity of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]      
Beginning balance $ 5,266,251 $ 5,144,148 $ 4,475,801
Total other comprehensive income 342,504 146,308 325,044
Ending balance 6,013,407 5,266,251 5,144,148
Unrealized losses on investment securities available for sale related to residual tax effects remaining in OCI 10,200 10,200 16,400
Unrealized loss on cash flow hedges related to residual tax effects remaining in OCI 11,600 11,600 12,700
Total      
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]      
Beginning balance (970,765) (1,117,073) (1,442,117)
Other comprehensive income (loss) before reclassifications 244,036 (198,438) 133,022
Amounts reclassified from AOCI 98,468 344,746 192,022
Total other comprehensive income 342,504 146,308 325,044
Ending balance (628,261) (970,765) (1,117,073)
Unamortized holding (losses) gains on AFS investment securities transferred to HTM      
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]      
Beginning balance (492,828) 0 0
Other comprehensive income (loss) before reclassifications 0 (537,434) 0
Amounts reclassified from AOCI 55,112 44,606 0
Total other comprehensive income 55,112 (492,828) 0
Ending balance (437,716) (492,828) 0
Net unrealized gains (losses) on AFS investment securities      
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]      
Beginning balance (411,413) (998,259) (1,220,263)
Other comprehensive income (loss) before reclassifications 210,965 392,169 163,813
Amounts reclassified from AOCI (534) 194,677 58,191
Total other comprehensive income 210,431 586,846 222,004
Ending balance (200,982) (411,413) (998,259)
Net unrealized gains (losses) on Cash Flow Hedges      
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]      
Beginning balance (66,524) (118,814) (221,854)
Other comprehensive income (loss) before reclassifications 33,071 (53,173) (30,791)
Amounts reclassified from AOCI 43,890 105,463 133,831
Total other comprehensive income 76,961 52,290 103,040
Ending balance $ 10,437 $ (66,524) $ (118,814)