CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 132,260	$ 108,648	$ 109,546
Other comprehensive income/(loss) before taxes:
Net unrealized gains/(losses) on available-for-sale securities	8,867	37,291	(22,831)
Net changes in held-to-maturity securities	(8,451)	(12,677)	(13,415)
Net unrealized gains/(losses) on cash flow hedges	22,084	(21,780)	(15,801)
Other comprehensive income/(loss) before tax	22,500	2,834	(52,047)
Income tax (expense)/benefit related to other comprehensive income/(loss)	(4,724)	(596)	10,930
Other comprehensive income/(loss) net of tax	17,776	2,238	(41,117)
Comprehensive income	$ 150,036	$ 110,886	$ 68,429