Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2017 - USD ($)	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Non-controlling interest	Common Class A	Common Class B	Total
Balances, January 1, 2017 at Dec. 31, 2016	$ 447,001,000	$ 16,808,000	$ (28,000)	$ (403,074,000)	$ 2,000		$ 60,709,000
Beginning balance, Shares at Dec. 31, 2016					17,652,548	1
Net income		12,442,000		13,266,000			25,708,000
Distributions to non-controlling unitholders				(10,971,000)			(10,971,000)
Equity-based compensation, value	1,293,000	(53,000)				$ 0	1,240,000
Equity-based compensation, shares					58,426
Dividends to Class A common stockholders		(6,369,000)					(6,369,000)
Change in accumulated other comprehensive income			216,000	247,000			463,000
Payroll taxes related to net settled restricted stock units	(816,000)	0					(816,000)
Payroll taxes related to net settled restricted stock units (in shares)					(13,983)
Ending balance, Value at Jun. 30, 2017	$ 447,478,000	$ 22,828,000	$ 188,000	$ (400,532,000)	$ 2,000		$ 69,964,000
Ending balance, Shares at Jun. 30, 2017					17,696,991	1