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CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Consolidated net income (loss)	$ 63,269us-gaap_NetIncomeLoss	$ 38,647us-gaap_NetIncomeLoss	$ (18,791)us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Change in unrealized value of investments	0	(79)	(25)
Foreign currency translation adjustment	607	(559)	343
Other comprehensive income (loss)	607	(638)	318
Comprehensive income (loss)	$ 63,876us-gaap_ComprehensiveIncomeNetOfTax	$ 38,009us-gaap_ComprehensiveIncomeNetOfTax	$ (18,473)us-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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- Definition

Amount after tax, before 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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