Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income, Before tax amount	$ 4,820	$ 4,932	$ 11,143	$ 4,746
Net unrealized holding (losses) gains on available-for-sale securities:
Unrealized holding gains (losses) arising during the period, Before tax amount	3,393	1,103	(4,613)	6,915
Reclassification adjustment for gains included in net income, Before tax amount	(2)	(1)	(5)	(1)
Other comprehensive (loss) income, Before tax amount	3,391	1,102	(4,618)	6,914
Unrealized holding (losses) gains arising during the period, Tax expense (benefit)	712	231	(969)	1,452
Reclassification adjustment for gains included in net income, Tax expense (benefit)			(1)
Other comprehensive (loss) income, Tax expense (benefit)	712	231	(970)	1,452
Unrealized holding (losses) gains arising during the period, Net of tax amount	2,681	872	(3,644)	5,463
Reclassification adjustment for gains included in net income, Net of tax amount	(2)	(1)	(4)	(1)
Other comprehensive (loss) income, Net of tax amount	2,679	871	(3,648)	5,462
Total comprehensive income, Before tax amount	8,211	6,034	6,525	11,660
Tax expense (benefit)	951	998	2,224	592
Total comprehensive income, Tax expense (benefit)	1,663	1,229	1,254	2,044
Net income	3,869	3,934	8,919	4,154
Total comprehensive income, Net of tax amount	$ 6,548	$ 4,805	$ 5,271	$ 9,616