Investment Securities - Amortized Costs, Gains and Losses, Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Investment Securities
Total Amortized Cost	$ 195,318	$ 175,123
Gross Unrealized Gains	3,127	768
Gross Unrealized Losses	(396)	(798)
Fair value	198,049	175,093
U.S. Treasury
Investment Securities
Total Amortized Cost	743	987
Gross Unrealized Gains	34	8
Gross Unrealized Losses	0	0
Fair value	777	995
U.S government agency obligations
Investment Securities
Total Amortized Cost	8,922	8,124
Gross Unrealized Gains	43	0
Gross Unrealized Losses	(19)	(77)
Fair value	8,946	8,047
U.S. government-sponsored enterprises
Investment Securities
Total Amortized Cost	37,320	22,300
Gross Unrealized Gains	433	41
Gross Unrealized Losses	0	(58)
Fair value	37,753	22,283
Obligations of states and political subdivisions
Investment Securities
Total Amortized Cost	42,724	33,704
Gross Unrealized Gains	486	144
Gross Unrealized Losses	(53)	(59)
Fair value	43,157	33,789
Mortgage-backed securities
Investment Securities
Total Amortized Cost	101,123	105,522
Gross Unrealized Gains	1,957	522
Gross Unrealized Losses	(63)	(428)
Fair value	103,017	105,616
Other debt securities
Investment Securities
Total Amortized Cost	3,000	3,000
Gross Unrealized Gains	174	53
Gross Unrealized Losses	0	0
Fair value	3,174	3,053
Bank issued trust preferred securities
Investment Securities
Total Amortized Cost	1,486	1,486
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(261)	(176)
Fair value	$ 1,225	$ 1,310