Condensed 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	$ 44,665	$ 50,200	$ 149,530	$ 143,042
Other comprehensive income (loss), after-tax:
Change in unrealized loss on available-for-sale securities	(41,257)	(45,283)	(30,956)	(173,878)
Reclassification of gain on sale of available-for-sale securities	0	0	(285)	0
Reclassification of gain on held-to-maturity securities	(647)	(647)	(1,971)	(2,052)
Change in unrealized gain (loss) on cash flow hedges	(2,684)	1,165	(4,747)	3,451
Reclassification of loss on cash flow hedges	224	55	462	511
Total other comprehensive loss, after-tax	(44,364)	(44,710)	(37,497)	(171,968)
Comprehensive income (loss)	$ 301	$ 5,490	$ 112,033	$ (28,926)