v3.25.2
Shareholders' Equity and Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]        
Beginning balance $ 5,412,303 $ 5,041,636 $ 5,266,251 $ 5,144,148
Total other comprehensive income (loss), net of tax amount 87,497 197,820 231,544 66,699
Ending balance 5,638,642 5,076,672 5,638,642 5,076,672
Unrealized losses on investment securities available for sale related to residual tax effects remaining in OCI     10,200 10,200
Unrealized gain (loss) on cash flow hedges related to residual tax effects remaining in OCI     11,600 11,600
Total        
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]        
Beginning balance (826,718) (1,248,194) (970,765) (1,117,073)
Other comprehensive income (loss) before reclassifications 60,738 (40,216) 178,237 (201,543)
Amounts reclassified from AOCI 26,759 238,036 53,307 268,242
Total other comprehensive income (loss), net of tax amount 87,497 197,820 231,544 66,699
Ending balance (739,221) (1,050,374) (739,221) (1,050,374)
Net unamortized holding (losses) gains on AFS investment securities transferred to HTM        
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]        
Beginning balance (480,314) 0 (492,828) 0
Other comprehensive income (loss) before reclassifications 0 (537,434) 0 (537,434)
Amounts reclassified from AOCI 14,151 15,654 26,665 15,654
Total other comprehensive income (loss), net of tax amount 14,151 (521,780) 26,665 (521,780)
Ending balance (466,163) (521,780) (466,163) (521,780)
Net unrealized gains (losses) on investment securities AFS        
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]        
Beginning balance (310,465) (1,116,309) (411,413) (998,259)
Other comprehensive income (loss) before reclassifications 39,623 511,079 140,571 393,029
Amounts reclassified from AOCI 0 194,677 0 194,677
Total other comprehensive income (loss), net of tax amount 39,623 705,756 140,571 587,706
Ending balance (270,842) (410,553) (270,842) (410,553)
Net unrealized gains (losses) on cash flow hedges        
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]        
Beginning balance (35,939) (131,885) (66,524) (118,814)
Other comprehensive income (loss) before reclassifications 21,115 (13,861) 37,666 (57,138)
Amounts reclassified from AOCI 12,608 27,705 26,642 57,911
Total other comprehensive income (loss), net of tax amount 33,723 13,844 64,308 773
Ending balance $ (2,216) $ (118,041) $ (2,216) $ (118,041)