Investment Securities - Amortized Costs, Gains and Losses, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	$ 213,659	$ 222,578
Gross Unrealized Gains	802	123
Gross Unrealized Losses	(1,280)	(4,496)
Fair value	213,181	218,205
U.S. Treasury
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	2,672	1,984
Gross Unrealized Gains	18	0
Gross Unrealized Losses	0	(32)
Fair value	2,690	1,952
U.S. government and federal agency obligations
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	9,222	10,235
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(41)	(269)
Fair value	9,182	9,966
Government sponsored enterprises
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	34,808	43,784
Gross Unrealized Gains	57	23
Gross Unrealized Losses	(86)	(472)
Fair value	34,779	43,335
Obligations of states and political subdivisions
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	38,583	40,859
Gross Unrealized Gains	133	28
Gross Unrealized Losses	(90)	(501)
Fair value	38,626	40,386
Mortgage-backed securities
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	123,888	121,230
Gross Unrealized Gains	441	72
Gross Unrealized Losses	(880)	(3,110)
Fair value	123,449	118,192
Other debt securities
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	3,000	3,000
Gross Unrealized Gains	152	0
Gross Unrealized Losses	0	0
Fair value	3,152	3,000
Bank issued trust preferred securities
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	1,486	1,486
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(183)	(112)
Fair value	$ 1,303	$ 1,374