Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income, Before tax amount	$ 4,692	$ 3,821	$ 9,438	$ 11,839
Net unrealized holding (losses) gains on available-for-sale securities:
Unrealized holding (losses) gains arising during the period, Before tax amount	(471)	1,189	6,444	9,677
Reclassification adjustment for (gains) losses included in net income, Before tax amount	(15)	(3)	(16)	36
Other comprehensive (loss) income, Before tax amount	(486)	1,186	6,428	9,713
Unrealized holding (losses) gains arising during the period, Tax expense (benefit)	(99)	250	1,353	2,033
Reclassification adjustment for (gains) losses included in net income, Tax expense (benefit)	(3)		(3)	8
Other comprehensive (loss) income, Tax expense (benefit)	(102)	250	1,350	2,041
Unrealized holding (losses) gains arising during the period, Net of tax amount	(372)	939	5,091	7,644
Reclassification adjustment for (gains) losses included in net income, Net of tax amount	(12)	(3)	(13)	28
Other comprehensive (loss) income, Net of tax amount	(384)	936	5,078	7,672
Total comprehensive income, Before tax amount	4,206	5,007	15,866	21,552
Tax expense (benefit)	914	731	1,506	2,227
Total comprehensive income, Tax expense (benefit)	812	981	2,856	4,268
Net income	3,778	3,090	7,932	9,612
Total comprehensive income, Net of tax amount	$ 3,394	$ 4,026	$ 13,010	$ 17,284