Redeemable Noncontrolling Interests and Equity - Schedule of Changes in Total Stockholders' Equity, Redeemable Noncontrolling Interest and Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Minority Interest [Line Items]
Balance at beginning of period			$ 659,560
Balance at beginning of period			147,139
Balance at beginning of period			554,069
Balance at beginning of period			105,491
Exercise of stock options			2,556
Issuance of restricted stock units, net of tax withholdings			(93)
Stock based compensation			8,718
Offering costs paid related to initial public offering			(437)	$ (4,722)
Balance at end of period	$ 163,520		163,520
Contributions from noncontrolling interests			157,498
Distributions to noncontrolling interests			(11,722)
Net income (loss) attributable to common stockholders	32,643	$ 7,540	45,777	(10,455)
Other comprehensive loss, net of taxes			(4,988)
Balance at end of period	606,858		606,858
Net income (loss) attributable to noncontrolling interest	97,370	$ 57,405	188,307	$ 91,930
Balance at end of period	121,796		121,796
Net income (loss) including portion attributable to noncontrolling interest			(83,694)
Balance at end of period	728,654		728,654
Redeemable Non Controlling Interests
Minority Interest [Line Items]
Balance at beginning of period			147,139
Contributions from redeemable noncontrolling interests			82,123
Distributions to redeemable noncontrolling interests			(6,906)
Net income (loss) attributable to redeemable noncontrolling interests			(58,836)
Balance at end of period	163,520		163,520
Total Stockholders' Equity
Minority Interest [Line Items]
Balance at beginning of period			554,069
Exercise of stock options			2,556
Issuance of restricted stock units, net of tax withholdings			(93)
Shares issued in connection with the Employee Stock Purchase Plan			1,256
Stock based compensation			8,718
Offering costs in connection with initial public offering			(437)
Net income (loss) attributable to common stockholders			45,777
Other comprehensive loss, net of taxes			(4,988)
Balance at end of period	606,858		606,858
Noncontrolling Interests
Minority Interest [Line Items]
Balance at beginning of period			105,491
Contributions from noncontrolling interests			157,498
Distributions to noncontrolling interests			(11,722)
Net income (loss) attributable to noncontrolling interest			(129,471)
Balance at end of period	$ 121,796		$ 121,796