Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Comprehensive income (loss), net of tax
Net income	$ 61,755	$ 152,098	$ 182,830	$ 391,171
Other comprehensive income (loss)
Net unrealized gain (loss) on securities	17,360	1,308	11,328	67,915
Reclassification of net realized (gain) loss on securities into earnings	(22,880)	(3,668)	(27,936)	(64,501)
Total other comprehensive income (loss)	(5,520)	(2,360)	(16,608)	3,414
Total comprehensive income	56,235	149,738	166,222	394,585
Comprehensive income attributable to noncontrolling interests	7,230	25,726	17,174	92,524
Comprehensive income attributable to common stockholders	$ 49,005	$ 124,012	$ 149,048	$ 302,061