CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 31,063	$ 25,492	$ 95,576	$ 73,948
Other comprehensive income/(loss) before taxes:
Net unrealized gains/(losses) on available-for-sale securities	991	47,235	29,966	(9,554)
Net changes in held-to-maturity securities	(2,385)	(2,523)	(6,195)	(10,707)
Net unrealized gains/(losses) on cash flow hedges	3,258	2,959	16,899	(27,429)
Other comprehensive income/(loss) before tax	1,864	47,671	40,670	(47,690)
Income tax (expense)/benefit related to other comprehensive income/(loss)	(391)	(10,011)	(8,541)	10,014
Other comprehensive income/(loss) net of tax	1,473	37,660	32,129	(37,676)
Comprehensive income	$ 32,536	$ 63,152	$ 127,705	$ 36,272