Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 77,993	$ (13,313)	$ 112,247	$ (45,381)
Other comprehensive income (loss):
Change in unrealized gain on available-for-sale securities, net		6		(15)
Other comprehensive income (loss), net		6		(15)
Comprehensive income (loss)	$ 77,993	$ (13,307)	$ 112,247	$ (45,396)