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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Comprehensive Income [Abstract]      
Net income $ 428,287 $ 277,538 $ 226,409
Change in debt securities available-for-sale:      
Unrealized holding gains (losses) for the period (1,004,054) (187,955) 125,214
Reclassification for securities transferred to held-to-maturity 165,473 0 0
Reclassification adjustment for securities (gains) losses realized in income 88 (4,327) (10,767)
Income tax effect 199,097 43,997 (25,243)
Unrealized gains (losses) on available-for-sale debt securities (639,396) (148,285) 89,204
Change in securities held-to-maturity:      
Adjustment for securities transferred from available-for-sale (165,473) 0 0
Amortization of unrealized losses on securities transferred     from available-for-sale 16,612 0 0
Income tax effect 36,197 0 0
Changes from securities held-to-maturity (112,664) 0 0
Change in cash flow hedges:      
Net unrealized derivative gains (losses) on cash flow hedges (45,132) 1,898 8,261
Reclassification adjustment for (gains) losses realized in net income 2,587 (4,605) (5,153)
Income tax effect 10,453 666 (764)
Changes from cash flow hedges (32,092) (2,041) 2,344
Change in defined benefit pension plans:      
Amortization of net (gains) losses recognized in income 139 239 21
Income tax effect (34) (59) (5)
Changes from defined benefit pension plans 105 180 16
Other comprehensive income (loss), net of tax (784,047) (150,146) 91,564
Comprehensive income (loss) $ (355,760) $ 127,392 $ 317,973