CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 58,137	$ 41,418	$ 152,384	$ 134,726
Other comprehensive income/(loss):
Net unrealized gains/(losses) on available-for-sale securities	22,076	(41,827)	46,068	(158,273)
Net changes in held-to-maturity securities	(31,525)	(622)	(32,628)	220
Net unrealized gains on cash flow hedges	7,566	24,596	5,553	72,684
Other comprehensive (loss)/income before tax	(1,883)	(17,853)	18,993	(85,369)
Income tax benefit/(expense) related to other comprehensive (loss)/income	395	3,748	(3,989)	17,927
Other comprehensive (loss)/income net of tax	(1,488)	(14,105)	15,004	(67,442)
Comprehensive income	$ 56,649	$ 27,313	$ 167,388	$ 67,284