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
Comprehensive income (loss), net of tax
Net income (loss)	$ 182,208	$ 109,222	$ 239,073	$ 122,297
Other comprehensive income (loss)
Net unrealized gain (loss) on securities	55,729	(16,193)	66,607	(10)
Reclassification of net realized (gain) loss on securities into earnings	(56,669)	3,698	(60,833)	3,698
Total other comprehensive income (loss)	(940)	(12,495)	5,774	3,688
Total comprehensive income (loss)	181,268	96,727	244,847	125,985
Comprehensive income (loss) attributable to noncontrolling interests	58,705	0	66,798	0
Comprehensive income (loss) attributable to common stockholders	$ 122,563	$ 96,727	$ 178,049	$ 125,985