Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Comprehensive income (loss), net of tax
Net income	$ 115,938	$ 41,798
Other comprehensive income (loss)
Net unrealized gain (loss) on securities	(19,969)	15,132
Reclassification of net realized (gain) loss on securities into earnings	3,121	(23,626)
Total other comprehensive income (loss)	(16,848)	(8,494)
Total comprehensive income	99,090	33,304
Comprehensive income attributable to noncontrolling interests	4,202	5,823
Comprehensive income attributable to common stockholders	$ 94,888	$ 27,481