CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$ 1,898	$ 129,705	$ 3,063	$ 102,561
Net change in unrealized gains and losses on marketable securities, net of a benefit from income taxes of $2,380	0	0	0	(4,418)
Comprehensive income	$ 1,898	$ 129,705	$ 3,063	$ 98,143