CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net income (loss)	$ (46,248)us-gaap_NetIncomeLoss	$ 37,027us-gaap_NetIncomeLoss	$ (10,937)us-gaap_NetIncomeLoss
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(1,281)	260	395
Gain (loss) on investments	(815)	4	(1)
Unrealized gains (losses) on cash flow hedge	311	0	0
Other comprehensive income (loss) before tax	(1,785)	264	394
Income tax expense (benefit) related to items of other comprehensive income (loss)	(14)us-gaap_OtherComprehensiveIncomeLossTax	8us-gaap_OtherComprehensiveIncomeLossTax	(16)us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income (loss) net of tax	(1,771)	256	410
Comprehensive income (loss)	$ (48,019)us-gaap_ComprehensiveIncomeNetOfTax	$ 37,283us-gaap_ComprehensiveIncomeNetOfTax	$ (10,527)us-gaap_ComprehensiveIncomeNetOfTax

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

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Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount before tax of other comprehensive income (loss) attributable to parent entity.

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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