Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock	Preferred Stock	Additional paid-in capital	Retained earnings (deficit)	Treasury stock	Parent	Noncontrolling Interest	Convertible Preferred Stock [Member]	Convertible Preferred Stock [Member] Preferred Stock	Convertible Preferred Stock [Member] Additional paid-in capital	Convertible Preferred Stock [Member] Parent
Beginning Balance at Dec. 31, 2012	$ 379,104	$ 568	$ 0	$ 404,311	$ (15,010)	$ (10,765)	$ 379,104
Beginning Balance, shares at Dec. 31, 2012		56,779,000	0			1,201,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock	149,069	$ 98		148,971			149,069
Issuance of Class A common stock, shares		9,780,000
Issuance of Class A common stock to Board member and advisors	57	$ 0		57			57
Issuance of Class A common stock to Board member and advisors, shares		22,000
Stock options expense related to equity based awards	1,232			1,232			1,232
Liability based stock option awards settled	162			162			162
Restricted stock issued	0	$ (4)		(4)
Restricted stock issued, shares		378,000
Restricted stock forfeited	(22)			(22)			(22)
Restricted stock forfeited, Shares						105,000
Restricted stock and restricted stock units expense	1,618			1,618			1,618
Capital contribution from non-controlling interest owners in less-than-wholly-owned subsidiaries	0
Net (loss) income	45,094				45,094		45,094
Cost to issue equity	(7,390)			(7,390)			(7,390)
Ending Balance, shares at Dec. 31, 2013		66,959,000	0			1,306,000
Ending Balance at Dec. 31, 2013	568,924	$ 670	$ 0	548,935	30,084	$ (10,765)	568,924
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock	181,875	$ 75		181,800			181,875
Issuance of Class A common stock, shares		7,500,000
Issuance of Class A common stock to Board member and advisors	16			16			16
Issuance of Class A common stock to Board member and advisors, shares		30,000
Stock options expense related to equity based awards	2,279			2,279			2,279
Stock options exercised	43			43			43
Stock options exercised, shares		8,000
Liability based stock option awards settled	84			84			84
Restricted stock issued	0	$ (2)		(2)			0
Restricted stock issued, shares		212,000
Restricted stock forfeited	(17)			(17)			(17)
Restricted stock forfeited, Shares						60,000
Restricted stock and restricted stock units expense	3,023			3,023			3,023
Cancellation of treasury stock		$ (13)		(10,752)		$ 10,765
Cancellation of treasury stock (shares)		(1,335,000)				(1,335,000)
Capital contribution from non-controlling interest owners in less-than-wholly-owned subsidiaries	150							$ 150
Class B dividends declared					0
Net (loss) income	110,754				110,771		110,771	(17)
Cost to issue equity	$ (590)	$ 0		(590)			(590)
Ending Balance, shares at Dec. 31, 2014	73,342,777	73,374,000	0			31,000
Ending Balance at Dec. 31, 2014	$ 866,541	$ 734	$ 0	724,819	140,855	$ 0	866,408	133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock	260,252	$ 104		260,148			260,252		$ 32,490	$ 1	$ 32,489	$ 32,490
Issuance of Class A common stock, shares		10,329,000								150,000
Conversion of Class B common stock to Class A common stock, shares		(1,500,000)	(150,000)
Stock Issued During Period, Value, Conversion of Convertible Securities		$ (15)	$ (1)	(14)
Stock options expense related to equity based awards	9,333			9,333			9,333
Stock options exercised	$ 10			10			10
Stock issued during period exercise of liability based option		25,000
Stock options exercised, shares	85,000	25,000
Liability based stock option awards settled	$ 446			446			446
Restricted stock issued	0	$ (4)		(4)			0
Restricted stock issued, shares		429,000
Restricted stock forfeited	0			0			0
Restricted stock forfeited, Shares						138,000
Vesting of restricted stock units		52,000
Restricted stock and restricted stock units expense	0	$ 1		(1)			0
Cancellation of treasury stock		$ (2)		2		$ 0
Cancellation of treasury stock (shares)		(167,000)				(167,000)
Capital contribution from non-controlling interest owners in less-than-wholly-owned subsidiaries	562							562
Net (loss) income	(679,524)				(679,785)		(679,785)	261
Cost to issue equity	$ (1,151)			(1,151)			(1,151)
Ending Balance, shares at Dec. 31, 2015	85,564,435	85,567,000				2,000
Ending Balance at Dec. 31, 2015	$ 488,959	$ 856		$ 1,026,077	$ (538,930)	$ 0	$ 488,003	$ 956