Statements Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statements Comprehensive Income (Loss)
Net loss	$ (98,188)us-gaap_NetIncomeLoss	$ (51,145)us-gaap_NetIncomeLoss	$ (14,562)us-gaap_NetIncomeLoss
Other comprehensive income:
Unrealized loss on available for sale securities, net of taxes	(65)
Other comprehensive income	(65)
Comprehensive loss	$ (98,253)us-gaap_ComprehensiveIncomeNetOfTax	$ (51,145)us-gaap_ComprehensiveIncomeNetOfTax	$ (14,562)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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