Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	$ 5,216	$ (342)
Interest income (expense)	(381,488)	(222,785)
Salaries and employee benefits	137,364	124,147
Income tax (expense) benefit	(41,421)	8,714
Net income (loss)	(146,600)	27,586
Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(13,535)	538
Amount Reclassified from AOCI | Unrealized gains and losses on    available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	(5,216)	342
Income tax (expense) benefit	1,349	(81)
Net income (loss)	(3,867)	261
Amount Reclassified from AOCI | Unrealized gains and losses on    held-to-maturity securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income (expense)	(5,829)	(310)
Income tax (expense) benefit	1,456	74
Net income (loss)	4,373	236
Amount Reclassified from AOCI | Gains and losses on hedges    Interest rate contracts | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income (expense)	(7,292)	669
Income tax (expense) benefit	1,856	(164)
Net income (loss)	(5,436)	505
Amount Reclassified from AOCI | Actuarial gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	188	11
Income tax (expense) benefit	(47)	(3)
Net income (loss)	$ 141	$ 8