Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 27,098us-gaap_NetIncomeLoss	$ 23,756us-gaap_NetIncomeLoss	$ 22,688us-gaap_NetIncomeLoss
Foreign currency translation adjustments	(5,783)	197	1,411
Comprehensive income	$ 21,315us-gaap_ComprehensiveIncomeNetOfTax	$ 23,953us-gaap_ComprehensiveIncomeNetOfTax	$ 24,099us-gaap_ComprehensiveIncomeNetOfTax

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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