Unaudited Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 79,338	$ 75,619	$ 223,525	$ 234,048
Available-For-Sale and Transferred Securities:
Unrealized losses on available-for-sale securities	(228,991)	(15,259)	(706,968)	(84,929)
Reclassification adjustment for gains included in net income	(15)	(498)	(780)	(870)
Reclassification adjustment for securities transferred from available-for-sale to held-to-maturity	1,347	(1,379)	1,751	(2,237)
Tax effect	57,506	4,330	178,382	22,246
Net of tax amount	(170,153)	(12,806)	(527,615)	(65,790)
Cash Flow Hedge:
Unrealized gains on derivatives used for cash flow hedges	3,132	30	7,002	479
Reclassification adjustment for gains included in net income	(165)	0	(167)	0
Tax effect	(750)	(7)	(1,727)	(120)
Net of tax amount	2,217	23	5,108	359
Total other comprehensive loss, net of tax	(167,936)	(12,783)	(522,507)	(65,431)
Total Comprehensive (Loss) Income	$ (88,598)	$ 62,836	$ (298,982)	$ 168,617