Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional paid-in capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning Balance at Dec. 31, 2013	$ 71	$ 73,336	$ 40,637	$ (3,415)	$ 110,629
Net income			11,046		11,046
Other comprehensive income, net of taxes				5,793	5,793
Stock options, exercised	1	1,346			1,347
Tax benefit on stock options		234			234
Cash dividends, common stock			(2,297)		(2,297)
Ending Balance at Dec. 31, 2014	72	74,916	49,386	2,378	126,752
Net income			12,262		12,262
Other comprehensive income, net of taxes				(888)	(888)
Stock options, exercised	2	2,009			2,011
Tax benefit on stock options		438			438
Cash dividends, common stock			(3,550)		(3,550)
Ending Balance at Dec. 31, 2015	74	77,363	58,098	1,490	137,025
Net income			13,241		13,241
Other comprehensive income, net of taxes				(2,744)	(2,744)
Stock repurchased	(2)	(4,352)			(4,354)
Stock options, exercised	1	975			976
Tax benefit on stock options		178			178
Cash dividends, common stock			(4,284)		(4,284)
Ending Balance at Dec. 31, 2016	$ 73	$ 74,164	$ 67,055	$ (1,254)	$ 140,038