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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
Income tax expense at federal statutory rate $ 264,631 $ 213,572 $ 227,746
SALT expense, net of federal 45,906 64,798 28,603
LIHTCs and related benefits, net of amortization (16,804) (17,376) (7,070)
Other (597) (1,237) (824)
Changes in valuation allowances (1,378) 1,378 (368)
Tax-exempt interest, net (44,369) (31,500) (44,473)
Non-deductible FDIC deposit insurance premiums 12,878 12,305 10,693
Other (2,952) (4,156) (938)
Changes in unrecognized tax benefits (894) 3,635 4,466
Other, net 926 6,881 (1,171)
Income tax expense and effective tax rate $ 257,347 $ 248,300 $ 216,664
Percent      
Income tax expense at federal statutory rate 21.00% 21.00% 21.00%
SALT expense, net of federal 3.60% 6.40% 2.70%
LIHTCs and related benefits, net of amortization (1.30%) (1.70%) (0.70%)
Other (0.10%) (0.10%) (0.10%)
Changes in valuation allowances (0.10%) 0.10% 0.00%
Tax-exempt interest, net (3.50%) (3.10%) (4.10%)
Non-deductible FDIC deposit insurance premiums 1.00% 1.20% 1.00%
Other (0.20%) (0.40%) (0.10%)
Changes in unrecognized tax benefits (0.10%) 0.40% 0.40%
Other, net 0.10% 0.60% (0.10%)
Income tax expense and effective tax rate 20.40% 24.40% 20.00%