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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Minority Interest [Line Items]
Balance at beginning of period			$ 416,619
Balance at beginning of period			135,948
Balance at end of period	$ 151,288		151,288
Balance at beginning of period			324,864
Proceeds from exercises of stock options			2,387	$ 1,116
Stock based compensation			6,495
Issuance of shares due to business acquisition			19,148
Net income (loss) attributable to common stockholders	7,540	$ (17,231)	(10,455)	(28,952)
Unrealized fair market value gain (loss)			1,425
Balance at end of period	343,864		343,864
Balance at beginning of period			91,755
Contributions from noncontrolling interests			104,739
Distributions to noncontrolling interests			(6,589)
Net loss attributable to noncontrolling interest	57,405	$ 15,517	91,930	$ 28,389
Balance at end of period	126,731		126,731
Net loss including portion attributable to noncontrolling interest			(73,629)
Balance at end of period	470,595		470,595
Redeemable Non Controlling Interests
Minority Interest [Line Items]
Balance at beginning of period			135,948
Contributions from redeemable noncontrolling interests			50,923
Distributions to redeemable noncontrolling interests			(6,827)
Net loss attributable to redeemable noncontrolling interests			(28,756)
Balance at end of period	151,288		151,288
Total Stockholders' Equity
Minority Interest [Line Items]
Balance at beginning of period			324,864
Proceeds from exercises of stock options			2,387
Stock based compensation			6,495
Issuance of shares due to business acquisition			19,148
Net income (loss) attributable to common stockholders			(10,455)
Unrealized fair market value gain (loss)			1,425
Balance at end of period	343,864		343,864
Noncontrolling Interests
Minority Interest [Line Items]
Balance at beginning of period			91,755
Contributions from noncontrolling interests			104,739
Distributions to noncontrolling interests			(6,589)
Net loss attributable to noncontrolling interest			(63,174)
Balance at end of period	$ 126,731		$ 126,731