Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2013	$ 8,685	$ 154,171	$ (16,964)	$ 145,892
Net income		12,776		12,776
Dividends		(3,821)		(3,821)
Exercise of stock options	3	55		58
Other comprehensive income (loss), net of tax			7,917	7,917
Balance at Sep. 30, 2014	8,688	163,181	(9,047)	162,822
Balance at Dec. 31, 2014	8,688	163,287	(5,672)	166,303
Net income		12,275		12,275
Dividends		(3,686)		(3,686)
Exercise of stock options	7	120		127
Other comprehensive income (loss), net of tax			(627)	(627)
Balance at Sep. 30, 2015	$ 8,695	$ 171,996	$ (6,299)	$ 174,392