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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net income (loss)	$ 20,460us-gaap_NetIncomeLoss	$ (6,482)us-gaap_NetIncomeLoss
Other comprehensive income (loss), net of applicable taxes:
Foreign currency translation adjustment	(2,145)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	203us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Unrealized gain on short-term investments	1us-gaap_UnrealizedGainLossOnInvestments	9us-gaap_UnrealizedGainLossOnInvestments
Total other comprehensive (loss) income	(2,144)us-gaap_OtherComprehensiveIncomeLossNetOfTax	212us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income (loss)	$ 18,316us-gaap_ComprehensiveIncomeNetOfTax	$ (6,270)us-gaap_ComprehensiveIncomeNetOfTax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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