Stockholders' Equity (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Sep. 02, 2014	Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 151,725,000
Net income	4,107,000	4,317,000
Foreign currency translation adjustment	(4,585,000)
Repurchases of common stock	(364,000)
Stock-based compensation expense	612,000	506,000
Issuance of stock for employer contributions to retirement plan	661,000
Other	88,000
Ending Balance	152,244,000
Long-term Debt, Gross			40,000,000
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance				171,000
Ending Balance	171,000			171,000
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	104,523,000
Stock-based compensation expense	612,000
Issuance of stock for employer contributions to retirement plan	266,000
Other	(93,000)
Ending Balance	105,308,000
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	54,809,000
Net income	4,107,000
Ending Balance	58,916,000
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(381,000)
Repurchases of common stock	(364,000)
Issuance of stock for employer contributions to retirement plan	395,000
Other	181,000
Ending Balance	(169,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(7,397,000)
Foreign currency translation adjustment	(4,585,000)
Ending Balance	$ (11,982,000)