Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 18,336us-gaap_NetIncomeLoss	$ 15,417us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Foreign currency translation adjustments	(5,400)	1,128
Total other comprehensive income (loss)	(5,400)	1,128
Comprehensive income	$ 12,936us-gaap_ComprehensiveIncomeNetOfTax	$ 16,545us-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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