CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 145,127	$ 131,790	$ 274,237	$ 257,218
Other comprehensive income (loss), net of tax:
Change in fair value on available-for-sale securities, net of tax	(96,191)	28,242	(231,086)	(5,130)
Change in fair value of cash flow hedges, net of tax	0	(631)	0	(18,373)
Accretion of net unrealized gains on securities transferred from available-for-sale to held-to-maturity, net of tax	(1,595)	(2,098)	(2,575)	(3,789)
Net gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax	(2,511)	(2,692)	(5,020)	(2,188)
Net loss (gain) on sale of investment securities reclassified from other comprehensive income into net income, net of tax	0	(270)	45	(270)
Total other comprehensive income (loss), net of tax	(100,297)	22,551	(238,636)	(29,750)
Total comprehensive income	$ 44,830	$ 154,341	$ 35,601	$ 227,468