Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Treasury Stock	Total
Balances at Dec. 31, 2013	$ 650	$ 19,319	$ (1,498)	$ 168,133	$ (49,799)	$ 136,805
Balances (in shares) at Dec. 31, 2013	5,575,132
Increase (Decrease) in Stockholders' Equity
Stock options exercised		(1)				(1)
Stock options exercised (in shares)	9,117
Stock-based compensation	$ 2	1,100				1,102
Stock-based compensation (in shares)	15,268
Treasury shares purchased					(266)	(266)
Treasury shares purchased (in shares)	(4,198)
Cash dividends paid				(2,790)		(2,790)
Net income				19,367		19,367
Minimum pension liability adjustment, net of tax expense (benefit) of $344 and $(46) for 2015 and 2014, respectively			(81)			(81)
Mark to market of interest rate hedges, net of tax expense of $241 and $317 for 2015 and 2014, respectively			555			555
Comprehensive (loss) income			474	19,367		19,841
Balances at Dec. 31, 2014	$ 652	20,418	(1,024)	184,710	(50,065)	154,691
Balances (in shares) at Dec. 31, 2014	5,595,319
Increase (Decrease) in Stockholders' Equity
Stock options exercised		28				28
Stock options exercised (in shares)	1,000
Stock-based compensation	$ 3	1,196				1,199
Stock-based compensation (in shares)	16,261
Treasury shares purchased					(403)	(403)
Treasury shares purchased (in shares)	(6,899)
Cash dividends paid				(2,798)		(2,798)
Net income				12,886		12,886
Minimum pension liability adjustment, net of tax expense (benefit) of $344 and $(46) for 2015 and 2014, respectively			602			602
Mark to market of interest rate hedges, net of tax expense of $241 and $317 for 2015 and 2014, respectively			422			422
Comprehensive (loss) income			1,024	12,886		13,910
Balances at Dec. 31, 2015	$ 655	21,642		194,798	(50,468)	166,627
Balances (in shares) at Dec. 31, 2015	5,605,681
Increase (Decrease) in Stockholders' Equity
Stock options exercised	$ 1	154				155
Stock options exercised (in shares)	5,683
Stock-based compensation	$ 1	1,035				1,036
Stock-based compensation (in shares)	16,708
Treasury shares purchased					(2,928)	$ (2,928)
Treasury shares purchased (in shares)	(53,932)					(50,068)
Cash dividends paid				(2,782)		$ (2,782)
Net income				17,754		17,754
Mark to market of foreign exchange hedges, net of $129 tax benefit			(223)			(223)
Comprehensive (loss) income			(223)	17,754		17,531
Balances at Dec. 31, 2016	$ 657	$ 22,831	$ (223)	$ 209,770	$ (53,396)	$ 179,639
Balances (in shares) at Dec. 31, 2016	5,574,140