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)
Acquisition of treasury stock					(736)
Stock options exercised					16
Equity based compensation		221
Net income			6,199			$ 6,199
Additional minimum pension liability, net of tax				53
Unrealized holding (losses) gains arising during period, net of tax				1,379
Reclassification adjustment for (gains) losses included in net income, net of tax				64
Balance at Jun. 30, 2014	3,757	123,048	112,408	18,379	(12,278)	245,314
Balance at Mar. 31, 2014	3,757	122,937	110,757	15,719	(11,558)
Acquisition of treasury stock					(736)
Stock options exercised					16
Equity based compensation		111
Net income			1,651			1,651
Additional minimum pension liability, net of tax				27
Unrealized holding (losses) gains arising during period, net of tax				2,448
Reclassification adjustment for (gains) losses included in net income, net of tax				185
Balance at Jun. 30, 2014	3,757	123,048	112,408	18,379	(12,278)	245,314
Balance at Dec. 31, 2014	3,757	123,194	119,638	17,801	(12,353)	252,037
Acquisition of treasury stock					(730)
Stock options exercised		(113)			707
Equity based compensation		537
Net income			11,719			11,719
Additional minimum pension liability, net of tax				34
Unrealized holding (losses) gains arising during period, net of tax				1,926
Reclassification adjustment for (gains) losses included in net income, net of tax				(3,805)
Balance at Jun. 30, 2015	3,757	123,618	131,357	15,956	(12,376)	262,312
Balance at Mar. 31, 2015	3,757	123,555	124,981	21,853	(12,428)
Acquisition of treasury stock					(443)
Stock options exercised		(103)			495
Equity based compensation		166
Net income			6,376			6,376
Additional minimum pension liability, net of tax				17
Unrealized holding (losses) gains arising during period, net of tax				(2,669)
Reclassification adjustment for (gains) losses included in net income, net of tax				(3,245)
Balance at Jun. 30, 2015	$ 3,757	$ 123,618	$ 131,357	$ 15,956	$ (12,376)	$ 262,312