Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2013	$ 3,757	$ 122,827	$ 106,209	$ 16,883	$ (11,558)
Equity based compensation		110
Net income			4,548			4,548
Additional minimum pension liability, net of tax				26
Net unrealized holding gains (losses) arising during period, net of tax				(1,070)
Reclassification adjustment for gains included in net income, net of tax				(120)
Balance at Mar. 31, 2014	3,757	122,937	110,757	15,719	(11,558)	241,612
Balance at Dec. 31, 2014	3,757	123,194	119,638	17,801	(12,353)	252,037
Acquisition of treasury stock					(287)
Stock options exercised		(10)			212
Equity based compensation		371
Net income			5,343			5,343
Additional minimum pension liability, net of tax				17
Net unrealized holding gains (losses) arising during period, net of tax				4,595
Reclassification adjustment for gains included in net income, net of tax				(560)
Balance at Mar. 31, 2015	$ 3,757	$ 123,555	$ 124,981	$ 21,853	$ (12,428)	$ 261,718