Investment Securities - Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($)
Investment Securities
Less than 12 months Fair Value	$ 25,212	$ 18,766
Less than 12 months Unrealized Loss	(310)	(97)
12 months or more Fair Value	2,235	19,112
12 months or more Unrealized Loss	(26)	(247)
Total Fair Value	27,447	37,878
Total Unrealized Loss	(336)	(344)
Collateralized mortgage obligations
Investment Securities
Less than 12 months Fair Value	201	11,792
Less than 12 months Unrealized Loss		(65)
12 months or more Fair Value	1,188	7,330
12 months or more Unrealized Loss	(14)	(122)
Total Fair Value	1,389	19,122
Total Unrealized Loss	$ (14)	(187)
Number of securities continuous unrealized loss position more than twelve months | security	4
Agency mortgage-backed securities
Investment Securities
Less than 12 months Fair Value		4,577
Less than 12 months Unrealized Loss		(20)
12 months or more Fair Value	$ 566	10,918
12 months or more Unrealized Loss	(10)	(115)
Total Fair Value	566	15,495
Total Unrealized Loss	$ (10)	(135)
Number of securities continuous unrealized loss position more than twelve months | security	2
Municipal securities
Investment Securities
Less than 12 months Fair Value	$ 851	1,806
Less than 12 months Unrealized Loss	(2)	(7)
12 months or more Fair Value		864
12 months or more Unrealized Loss		(10)
Total Fair Value	851	2,670
Total Unrealized Loss	$ (2)	(17)
Number of securities continuous unrealized loss position more than twelve months | security	1
U.S. Government agency securities
Investment Securities
Less than 12 months Fair Value	$ 24,160	591
Less than 12 months Unrealized Loss	(308)	(5)
12 months or more Fair Value	481
12 months or more Unrealized Loss	(2)
Total Fair Value	24,641	591
Total Unrealized Loss	$ (310)	$ (5)
Number of securities continuous unrealized loss position more than twelve months | security	42