Accumulated Other Comprehensive Income (Loss) - Comprehensive income/loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Change in net unrealized gain (loss) on securities available for sale, before tax	$ 2,044	$ (526)	$ 252
Change in net unrealized loss on securities available for sale, tax effect	(5)	216	83
Change in net unrealized loss on securities available for sale, net of tax	2,049	(742)	169
Other comprehensive Income (loss), before tax	2,044	(526)	252
Other comprehensive income (loss), tax effect	(5)	216	83
Other comprehensive income (loss), net of tax	$ 2,049	$ (742)	$ 169