Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 20,695	$ 16,659
Unrealized gain on securities:
Unrealized holding (loss) gain arising during period	(52,163)	(11,785)
Less: reclassification adjustment for net gain included in net income		(99)
Income tax benefit (expense) related to items of other comprehensive income	15,787	3,515
Other comprehensive income (loss), net of tax	(36,376)	(8,369)
Comprehensive income (loss)	$ (15,681)	$ 8,290