UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT AND NON-CONTROLLING INTEREST - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Common Class A	Common Class B	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-in Capital	Retained Earnings	Non-controlling Interest
Beginning balance at Dec. 31, 2014	$ (206,101)			$ 105	$ 150	$ (112,185)	$ 1,599	$ (95,770)
Beginning balance (in shares) at Dec. 31, 2014		10,476,190	14,951,625	10,476,000	14,952,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment of costs directly associated with the issuance of Class A common stock	(283)					(283)
Equity-based compensation	674					674		0
Net income (loss)	18,022						8,348
Net income attributable to non-controlling interest	9,674
Ending balance at Jun. 30, 2015	$ (187,688)			$ 105	$ 150	$ (111,794)	$ 9,947	$ (86,096)
Ending balance (in shares) at Jun. 30, 2015		10,476,190	14,951,625	10,476,000	14,952,000