Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 27,169	$ 26,565	$ 72,915	$ 65,346
Unrealized gain on securities:
Unrealized holding (loss) gain arising during period	(42,135)	(3,568)	(125,368)	(11,877)
Less: reclassification adjustment for net gain included in net income				(99)
Income tax benefit (expense) related to items of other comprehensive income	12,641	1,070	37,749	3,543
Other comprehensive income (loss), net of tax	(29,494)	(2,498)	(87,619)	(8,433)
Comprehensive income (loss)	$ (2,325)	$ 24,067	$ (14,704)	$ 56,913