Redeemable Noncontrolling Interests and Equity - Schedule of Changes in Total Stockholders Equity, Redeemable Noncontrolling Interest and Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Minority Interest [Line Items]
Balance at beginning of period			$ 416,619
Balance at beginning of period			135,948
Issuance of common stock in connection with the initial public offering, net of issuance costs			221,318
Balance at end of period	$ 176,705		176,705
Balance at beginning of period			324,864
Proceeds from exercises of stock options			3,188	$ 2,404
Stock based compensation			10,547
Issuance of shares due to business acquisition			19,148
Net income (loss) attributable to common stockholders	(2,768)	$ (15,214)	(13,223)	$ (44,166)
Unrealized fair market value gain (loss)			(2,695)
Balance at end of period	561,606		561,606
Balance at beginning of period			91,755
Contributions from noncontrolling interests			104,739
Distributions to noncontrolling interests			(10,802)
Balance at end of period	84,637		84,637
Net loss including portion attributable to noncontrolling interest			(114,278)
Balance at end of period	646,243		646,243
Series D and E Preferred Shares
Minority Interest [Line Items]
Inducement shares issued to Series D and E preferred stockholders			23,349
Deemed dividend to Series D and E convertible preferred stockholders			(24,890)
Redeemable Non Controlling Interests
Minority Interest [Line Items]
Balance at beginning of period			135,948
Contributions from redeemable noncontrolling interests			110,984
Distributions to redeemable noncontrolling interests			(9,906)
Net loss attributable to redeemable noncontrolling interests			(60,321)
Balance at end of period	176,705		176,705
Total Stockholders' Equity
Minority Interest [Line Items]
Issuance of common stock in connection with the initial public offering, net of issuance costs			221,318
Balance at beginning of period			324,864
Proceeds from exercises of stock options			3,188
Stock based compensation			10,547
Issuance of shares due to business acquisition			19,148
Net income (loss) attributable to common stockholders			(13,223)
Unrealized fair market value gain (loss)			(2,695)
Balance at end of period	561,606		561,606
Total Stockholders' Equity | Series D and E Preferred Shares
Minority Interest [Line Items]
Inducement shares issued to Series D and E preferred stockholders			23,349
Deemed dividend to Series D and E convertible preferred stockholders			(24,890)
Noncontrolling Interests
Minority Interest [Line Items]
Balance at beginning of period			91,755
Contributions from noncontrolling interests			104,739
Distributions to noncontrolling interests			(10,802)
Net loss attributable to noncontrolling interest			(101,055)
Balance at end of period	$ 84,637		$ 84,637