Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Comprehensive income (loss), net of tax
Net income (loss)	$ 152,098	$ 63,145	$ 391,171	$ 185,442
Other comprehensive income (loss)
Net unrealized gain (loss) on securities	1,308	7,687	67,915	7,677
Reclassification of net realized (gain) loss on securities into earnings	(3,668)	(11,213)	(64,501)	(7,515)
Total other comprehensive income (loss)	(2,360)	(3,526)	3,414	162
Total comprehensive income (loss)	149,738	59,619	394,585	185,604
Comprehensive income (loss) attributable to noncontrolling interests	25,726	0	92,524	0
Comprehensive income (loss) attributable to common stockholders	$ 124,012	$ 59,619	$ 302,061	$ 185,604