Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jan. 01, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 167,496
Net income	4,086	$ 3,800
Cumulative effect adjustment of adopting ASU 2016-09			$ 97
Foreign currency translation adjustment	1,011
Change in fair value of interest rate swap	(55)
Repurchases of common stock	(1,674)
Stock-based compensation expense	796
Issuance of stock for employer contributions to retirement plan	662
Other	(135)
Ending Balance	$ 172,284
Stock Repurchased During Period, Shares	70,000	181,000
Stock Repurchased During Period, Value	$ 1,700	$ 4,300
Stock Repurchase Program, Remaining Authorized Repurchase Amount	4,400
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	172
Ending Balance	172
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	106,569
Cumulative effect adjustment of adopting ASU 2016-09			234
Stock-based compensation expense	796
Issuance of stock for employer contributions to retirement plan	(51)
Other	(590)
Ending Balance	106,958
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	93,845
Net income	4,086
Cumulative effect adjustment of adopting ASU 2016-09			$ (137)
Ending Balance	97,794
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(11,628)
Repurchases of common stock	(1,674)
Issuance of stock for employer contributions to retirement plan	713
Other	455
Ending Balance	(12,134)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(21,462)
Foreign currency translation adjustment	1,011
Change in fair value of interest rate swap	(55)
Ending Balance	$ (20,506)