Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Class A common stock	Class B common stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Total
Balance at beginning of period at Dec. 31, 2014	$ 198	$ 316		$ 136,896	$ (24,118)	$ 85	$ 61,008	$ 174,385
Balance at beginning of the period (in shares) at Dec. 31, 2014	19,770,893	31,621,542
Changes in Equity
Net income (loss)					5,336		14,625	19,961
Equity-based compensation				7,483			1,066	8,549
Equity-based compensation (in shares)	22,239	(3,838)
Other comprehensive income (loss)						(307)	(536)	(843)
Dividends and distributions				455	(4,447)		(31,461)	(35,453)
Treasury Stock purchases			$ (4,327)					$ (4,327)
Treasury Stock purchases (in shares)			(135,906)					(135,906)
Net excess tax benefit from equity-based compensation				3				$ 3
Balance at end of period at Mar. 31, 2015	$ 198	$ 316	$ (4,327)	144,837	(23,229)	(222)	44,702	162,275
Balance at end of the period (in shares) at Mar. 31, 2015	19,793,132	31,617,704	(135,906)
Balance at beginning of period at Dec. 31, 2014	$ 198	$ 316		136,896	(24,118)	85	61,008	174,385
Balance at beginning of the period (in shares) at Dec. 31, 2014	19,770,893	31,621,542
Changes in Equity
Treasury Stock purchases								(4,327)
Balance at end of period at Dec. 31, 2015	$ 205	$ 312	$ (7,616)	190,703	(15,338)	108	89,044	257,418
Balance at end of the period (in shares) at Dec. 31, 2015	20,536,740	31,229,236	(263,622)
Changes in Equity
Net income (loss)					6,970		18,649	25,619
Equity-based compensation	$ 2			15,794			897	16,693
Equity-based compensation (in shares)	186,516	(1,640)
Other comprehensive income (loss)						(25)	(41)	(66)
Dividends and distributions				5,351	(27,882)		(70,313)	(92,844)
Treasury Stock purchases			$ (1,847)					$ (1,847)
Treasury Stock purchases (in shares)			(70,431)					(70,431)
Net excess tax benefit from equity-based compensation				(89)				$ (89)
Other				34				34
Balance at end of period at Mar. 31, 2016	$ 207	$ 312	$ (9,463)	$ 211,793	$ (36,250)	$ 83	$ 38,236	$ 204,918
Balance at end of the period (in shares) at Mar. 31, 2016	20,723,256	31,227,596	(334,053)