Unaudited Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (1,515)us-gaap_NetIncomeLoss	$ 12,018us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Foreign currency translation adjustment	(240)	(149)
Comprehensive income (loss)	$ (1,755)us-gaap_ComprehensiveIncomeNetOfTax	$ 11,869us-gaap_ComprehensiveIncomeNetOfTax

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration