Stockholders' Equity (Details) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Sep. 02, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 158,344,000
Net income	3,800,000	$ 4,107,000
Foreign currency translation adjustment	(396,000)
Repurchases of common stock	(4,291,000)
Stock-based compensation expense	727,000	$ 612,000
Issuance of stock for employer contributions to retirement plan	691,000
Other	76,000
Ending Balance	$ 158,951,000
Long-term Debt, Gross			$ 40,000,000
Stock Repurchased During Period, Shares	181	10
Stock Repurchased During Period, Value	$ 4,300,000	$ 400,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	9,700,000
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	172,000
Other	0
Ending Balance	172,000
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	105,872,000
Stock-based compensation expense	727,000
Issuance of stock for employer contributions to retirement plan	5,000
Other	(65,000)
Ending Balance	106,539,000
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	73,598,000
Net income	3,800,000
Ending Balance	77,398,000
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(8,497,000)
Repurchases of common stock	(4,291,000)
Issuance of stock for employer contributions to retirement plan	686,000
Other	141,000
Ending Balance	(11,961,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(12,801,000)
Foreign currency translation adjustment	(396,000)
Ending Balance	$ (13,197,000)