CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 12,746	$ 478	$ 30,684	$ (5,002)
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) during period, net of taxes	(1)	(35)	(11)	(54)
Net unrealized gains (losses) on available-for-sale securities	(1)	(35)	(11)	(54)
Comprehensive income (loss)	$ 12,745	$ 443	$ 30,673	$ (5,056)