Securities (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) Security	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Security	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) Security
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 164,443		$ 164,443		$ 202,000
Gross Unrealized Gains	1,038		1,038		532
Gross unrealized losses	(1,369)		(1,369)		(3,167)
Securities available-for-sale, at fair value	164,112		164,112		199,365
Available-for-sale Securities, Realized Gains (Losses) [Abstract]
Realized gains on sales of securities	2	$ 24	89	$ 578
Realized losses on sales of securities	0	(17)	0	(56)
Net realized gain	2	$ 7	89	$ 522
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	348		348		3,166
More Than Twelve Months	1,021		1,021		1
Gross Unrealized Losses	1,369		1,369		3,167
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	42,752		42,752		129,682
More Than Twelve Months	55,575		55,575		100
Total	$ 98,327		$ 98,327		$ 129,782
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Cause			caused by increases in market interest rates.
Number of Securities | Security	60		60		98
U.S. Treasury Securities [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost					$ 20,000
Gross Unrealized Gains					0
Gross unrealized losses					0
Securities available-for-sale, at fair value					20,000
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Gross Unrealized Losses					0
Obligations of U.S. Government Agencies [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 9,574		$ 9,574		9,361
Gross Unrealized Gains	11		11		0
Gross unrealized losses	(92)		(92)		(166)
Securities available-for-sale, at fair value	9,493		9,493		9,195
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	10		10		166
More Than Twelve Months	82		82		0
Gross Unrealized Losses	92		92		166
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	4,393		4,393		9,195
More Than Twelve Months	3,120		3,120		0
Total	$ 7,513		$ 7,513		$ 9,195
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities | Security	11		11		6
Obligations of states and political subdivisions [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 67,815		$ 67,815		$ 78,645
Gross Unrealized Gains	771		771		358
Gross unrealized losses	(152)		(152)		(1,016)
Securities available-for-sale, at fair value	68,434		68,434		77,987
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	80		80		1,016
More Than Twelve Months	72		72		0
Gross Unrealized Losses	152		152		1,016
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	5,006		5,006		38,020
More Than Twelve Months	6,898		6,898		0
Total	$ 11,904		$ 11,904		$ 38,020
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities | Security	15		15		56
Mortgage-backed securities [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 78,436		$ 78,436		$ 85,649
Gross Unrealized Gains	0		0		18
Gross unrealized losses	(1,120)		(1,120)		(1,973)
Securities available-for-sale, at fair value	77,316		77,316		83,694
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	257		257		1,973
More Than Twelve Months	863		863		0
Gross Unrealized Losses	1,120		1,120		1,973
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	32,054		32,054		80,680
More Than Twelve Months	45,262		45,262		0
Total	$ 77,316		$ 77,316		$ 80,680
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities | Security	24		24		23
Money market investments [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 1,169		$ 1,169		$ 647
Gross Unrealized Gains	0		0		0
Gross unrealized losses	0		0		0
Securities available-for-sale, at fair value	1,169		1,169		647
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Gross Unrealized Losses	0		0		0
Corporate Bond and Other Securities [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	7,349		7,349		7,598
Gross Unrealized Gains	166		166		92
Gross unrealized losses	(5)		(5)		(12)
Securities available-for-sale, at fair value	7,510		7,510		7,678
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	1		1		11
More Than Twelve Months	4		4		1
Gross Unrealized Losses	5		5		12
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	1,299		1,299		1,787
More Than Twelve Months	295		295		100
Total	$ 1,594		$ 1,594		$ 1,887
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities | Security	10		10		13
Common Stock [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	$ 100		$ 100		$ 100
Gross Unrealized Gains	90		90		64
Gross unrealized losses	0		0		0
Securities available-for-sale, at fair value	190		190		164
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Gross Unrealized Losses	$ 0		$ 0		$ 0