Investment Securities - Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Investment Securities
Less than 12 months Fair Value	$ 77,613	$ 25,212
Less than 12 months Unrealized Loss	(3,196)	(310)
12 months or more Fair Value	2,159	2,235
12 months or more Unrealized Loss	(22)	(26)
Total Fair Value	79,772	27,447
Total Unrealized Loss	$ (3,218)	$ (336)
Number of securities continuous unrealized loss position more than twelve months | security	116	49
Collateralized mortgage obligations
Investment Securities
Less than 12 months Fair Value	$ 2,749	$ 201
Less than 12 months Unrealized Loss	(66)
12 months or more Fair Value	1,136	1,188
12 months or more Unrealized Loss	(10)	(14)
Total Fair Value	3,885	1,389
Total Unrealized Loss	(76)	(14)
Agency mortgage-backed securities
Investment Securities
Less than 12 months Fair Value	13,534
Less than 12 months Unrealized Loss	(319)
12 months or more Fair Value	555	566
12 months or more Unrealized Loss	(10)	(10)
Total Fair Value	14,089	566
Total Unrealized Loss	(329)	(10)
Municipal securities
Investment Securities
Less than 12 months Fair Value	20,188	851
Less than 12 months Unrealized Loss	(349)	(2)
Total Fair Value	20,188	851
Total Unrealized Loss	(349)	(2)
U.S. Government agency securities
Investment Securities
Less than 12 months Fair Value	41,142	24,160
Less than 12 months Unrealized Loss	(2,462)	(308)
12 months or more Fair Value	468	481
12 months or more Unrealized Loss	(2)	(2)
Total Fair Value	41,610	24,641
Total Unrealized Loss	$ (2,464)	$ (310)