Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Deferred Compensation, Share-based Payments [Member]	AOCI Attributable to Parent [Member]		Total
Balance at Dec. 31, 2014	$ 383	$ 152,234	$ (35,266)	$ (3,725)	$ (183)	$ (632)	[1]	$ 112,811
Net income			2,433					2,433
Other comprehensive income (loss), net of tax						(2,533)	[1]	(2,533)
Stock based compensation		600						600
Options exercised	1	63						64
Balance at Dec. 31, 2015	384	152,897	(32,833)	(3,725)	(183)	(3,165)	[1]	113,375
Net income			4,945					4,945
Other comprehensive income (loss), net of tax						(4,129)	[1]	(4,129)
Stock based compensation		759						759
Options exercised	2	724						726
Proceeds from shares issued under common stock offering, net of offering costs	187	98,988						99,175
Stock options issued in acquisition		202						202
Balance at Dec. 31, 2016	573	253,570	(27,888)	(3,725)	(183)	(7,294)	[1]	215,053
Net income			8,905					8,905
Other comprehensive income (loss), net of tax						(215)	[1]	(215)
Stock based compensation		1,842						1,842
Options exercised	2	644						646
Conversion of subordinated debt to common stock (36,922 shares)		229						229
Balance at Dec. 31, 2017	$ 575	$ 256,285	$ (18,983)	$ (3,725)	$ (183)	$ (7,509)	[1]	$ 226,460

[1] All amounts are net of tax. Amounts in parentheses indicate reductions to other comprehensive income.