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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net income: $ 527,323 $ 312,321 $ 400,881
Other comprehensive income (loss), net of tax:      
Changes in fair value on available-for-sale securities, net of tax (32,509) 92,829 81,658
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax (18,373) 52,798 (5,179)
Amortization (accretion) of net unrealized losses (gains) on securities transferred from available-for-sale to held-to-maturity, net of tax (7,575) (5,126) 184
Loss (gain) on cash flow hedges reclassified from other comprehensive income into net income, net of tax (9,645) 5,542 1,588
Net loss (gain) on sale of investment securities reclassified from other comprehensive income into net income, net of tax (561) (728) 4,388
Total other comprehensive income (loss), net of tax (68,663) 145,315 82,639
Total comprehensive income $ 458,660 $ 457,636 $ 483,520