Stockholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stockholders Equity [Line Items]
Balance	$ 193,027
Net income	4,317	4,925
Foreign currency translation adjustments	(360)
Repurchases of common stock in the open market	(320)
Stock-based compensation	506	400
Issuance of stock for employer contributions to retirement plan	606
Other	47
Balance	197,823
Common Stock [Member]
Stockholders Equity [Line Items]
Balance	192
Net income	0
Foreign currency translation adjustments	0
Repurchases of common stock in the open market	0
Stock-based compensation	0
Issuance of stock for employer contributions to retirement plan	0
Other	0
Balance	192
Additional Paid-in Capital [Member]
Stockholders Equity [Line Items]
Balance	167,908
Net income	0
Foreign currency translation adjustments	0
Repurchases of common stock in the open market	0
Stock-based compensation	506
Issuance of stock for employer contributions to retirement plan	33
Other	(191)
Balance	168,256
Retained Earnings [Member]
Stockholders Equity [Line Items]
Balance	27,711
Net income	4,317
Foreign currency translation adjustments	0
Repurchases of common stock in the open market	0
Stock-based compensation	0
Issuance of stock for employer contributions to retirement plan	0
Other	0
Balance	32,028
Treasury Stock [Member]
Stockholders Equity [Line Items]
Balance	(1,170)
Net income	0
Foreign currency translation adjustments	0
Repurchases of common stock in the open market	(320)
Stock-based compensation	0
Issuance of stock for employer contributions to retirement plan	573
Other	238
Balance	(679)
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders Equity [Line Items]
Balance	(1,614)
Net income	0
Foreign currency translation adjustments	(360)
Repurchases of common stock in the open market	0
Stock-based compensation	0
Issuance of stock for employer contributions to retirement plan	0
Other	0
Balance	$ (1,974)