Consolidated Statements of Redeemable Noncontrolling Interests and Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Series E Convertible Preferred Stock	Series D And E Preferred Stock	Redeemable Noncontrolling Interests	Preferred Stock	Preferred Stock Series E Convertible Preferred Stock	Common Stock	Common Stock Series D And E Preferred Stock	Additional Paid-In Capital	Additional Paid-In Capital Series E Convertible Preferred Stock	Additional Paid-In Capital Series D And E Preferred Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total Stockholders' Equity	Total Stockholders' Equity Series E Convertible Preferred Stock	Total Stockholders' Equity Series D And E Preferred Stock	Noncontrolling Interest
Beginning Balance at Dec. 31, 2012				$ 95,941
Beginning Balance at Dec. 31, 2012	$ 222,661				$ 4		$ 1		$ 152,134				$ 13,050	$ 165,189			$ 57,472
Beginning Balance, (in shares) at Dec. 31, 2012					43,998		9,450
Exercise of stock options	1,119								1,119					1,119
Exercise of stock options, (in shares)							962
Stock-based compensation	2,655								2,655					2,655
Acquisition of noncontrolling interests				(16,906)
Acquisition of noncontrolling interests	(5,118)								(5,118)					(5,118)
Income tax effect of acquisition of noncontrolling interests	2,339								2,339					2,339
Contributions from noncontrolling interests and redeemable noncontrolling interests	92,142			73,189													92,142
Distributions to noncontrolling interests and redeemable noncontrolling interests	(61,178)			(8,973)													(61,178)
Net loss	(31,909)			(33,586)									(1,201)	(1,201)
Net loss, Noncontrolling Interest	(30,708)
Ending Balance at Dec. 31, 2013				109,665
Ending Balance at Dec. 31, 2013	222,711				$ 4		$ 1		153,129				11,849	164,983			57,728
Ending Balance, (in shares) at Dec. 31, 2013					43,998		10,412
Conversion of Preferred Stock		$ 143,393				$ 1				$ 143,392					$ 143,393
Conversion of Preferred Stock, (in shares)					(36)		36
Issuance of Series E convertible preferred stock, (in shares)						10,879
Issuance of shares for an acquisition	75,281						$ 1		75,280					75,281
Issuance of shares for an acquisition, (in shares)							12,763
Exercise of stock options	2,707								2,707					2,707
Exercise of stock options, (in shares)							1,038
Stock-based compensation	9,352								9,352					9,352
Contributions from noncontrolling interests and redeemable noncontrolling interests	80,653			88,837													80,653
Distributions to noncontrolling interests and redeemable noncontrolling interests	(10,923)			(11,619)													(10,923)
Net loss	(106,555)			(50,935)									(70,852)	(70,852)
Net loss, Noncontrolling Interest	(35,703)
Ending Balance at Dec. 31, 2014				135,948
Ending Balance at Dec. 31, 2014	416,619				$ 5		$ 2		383,860				(59,003)	324,864			91,755
Ending Balance, (in shares) at Dec. 31, 2014					54,841		24,249
Issuance of Series E convertible preferred stock, (in shares)					(54,841)		54,841
Issuance of shares for an acquisition	19,148								19,148					19,148
Issuance of shares for an acquisition, (in shares)							1,650
Exercise of stock options	$ 3,548								3,548					3,548
Exercise of stock options, (in shares)	1,210						1,210
Issuance of restricted stock units, net of tax withholdings	$ (103)								(103)					(103)
Issuance of restricted stock units, net of tax withholdings, (in shares)							182
Stock-based compensation	16,002								16,002					16,002
Contributions from noncontrolling interests and redeemable noncontrolling interests	147,238			128,466													147,238
Distributions to noncontrolling interests and redeemable noncontrolling interests	(17,193)			(12,924)													(17,193)
Inducement shares issued			$ 23,349					$ 1			$ 23,348					$ 23,349
Inducement shares issued, (in shares)								1,668
Deemed dividend			$ (24,890)								$ (24,890)					$ (24,890)
Conversion of convertible preferred stock to common stock					$ (5)		$ 5
Issuance of common stock in connection with underwritten public offering, net of issuance costs	221,318						$ 2		221,316					221,318
Issuance of common stock in connection with underwritten public offering, net of issuance costs, (in shares)							17,482
Net loss	(144,555)			(104,351)									(28,246)	(28,246)
Net loss, Noncontrolling Interest	(116,309)
Unrealized Gain Loss On Derivatives	(921)											$ (921)		(921)
Ending Balance at Dec. 31, 2015				$ 147,139
Ending Balance at Dec. 31, 2015	$ 659,560						$ 10		$ 642,229			$ (921)	$ (87,249)	$ 554,069			$ 105,491
Ending Balance, (in shares) at Dec. 31, 2015							101,282