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, 2016	$ 3,757	$ 123,166	$ 148,027	$ 10,371	$ (19,585)
Acquisition of treasury stock					(563)
Shares issued under employee benefit plans					43	$ (10)
Equity based compensation		27
Net (loss) income			3,986			3,986
Additional minimum pension liability, net of tax				23
Unrealized holding gains arising during period, net of tax				3,410
Reclassification adjustment for losses (gains) included in net income, net of tax				(1,626)
Balance at Mar. 31, 2017	3,757	123,183	152,013	12,178	(20,105)	271,026
Balance at Dec. 31, 2017	3,757	123,180	136,474	12,234	(24,527)	251,118
Acquisition of treasury stock					(377)
Reclassification of certain tax effects from accumulated other comprehensive income			(2,619)	2,619
Equity based compensation		44
Net (loss) income			647			647
Additional minimum pension liability, net of tax				21
Unrealized holding gains arising during period, net of tax				(312)
Reclassification adjustment for losses (gains) included in net income, net of tax				12
Balance at Mar. 31, 2018	$ 3,757	$ 123,224	151,495	(2,419)	$ (24,904)	$ 251,153
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018			$ 16,993	$ (16,993)