CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Non-Controlling Interests
Beginning Balance at Dec. 31, 2016	$ 763,429	$ 328	$ 419,099	$ 277,659	$ 66,343
Beginning Balance (in shares) at Dec. 31, 2016		32,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,015			36,372	4,643
Cash contributions from members of consolidated entities	58,829				58,829
Cash distributions to members of consolidated entities	(39,829)				(39,829)
Repurchases of common stock	(2,284)	$ (1)	(2,283)
Repurchases of common stock (in shares)		(102)
Shares remitted to Company to satisfy employee tax obligations	(1,450)	$ 0	(1,450)
Shares remitted to Company to satisfy employee tax obligations (in shares)		(76)
Stock based compensation expense	6,260	$ 0	6,260
Stock based compensation expense (in shares)		461
Ending Balance at Sep. 30, 2017	$ 825,970	$ 327	$ 421,626	$ 314,031	$ 89,986
Ending Balance (in shares) at Sep. 30, 2017		33,007