Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic earnings per share
Income (loss)	$ 9,581	$ 32,196	$ 43,792	$ 39,355
Loss from discontinued operations, net of income taxes	(1)	0	(3)	(5)
Net income	9,580	32,196	43,789	39,350
Less: net income attributable to noncontrolling interests	4,707	6,934	14,153	18,184
Numerator	$ 4,873	$ 25,262	$ 29,636	$ 21,166
Weighted average common stock outstanding	43,808	42,708	43,775	42,674
Basic earnings (loss) per share, Net	$ 0.11	$ 0.59	$ 0.68	$ 0.50
Continuing Operations [Member]
Basic earnings per share
Income (loss)	$ 9,581	$ 32,196	$ 43,792	$ 39,355
Less: net income attributable to noncontrolling interests	4,707	6,934	14,153	18,184
Numerator	$ 4,874	$ 25,262	$ 29,639	$ 21,171
Weighted average common stock outstanding	43,808	42,708	43,775	42,674
Basic earnings per share, Continuing Operations	$ 0.11	$ 0.59	$ 0.68	$ 0.50
Discontinued Operations [Member]
Basic earnings per share
Loss from discontinued operations, net of income taxes	$ (1)	$ 0	$ (3)	$ (5)
Less: net income attributable to noncontrolling interests	0	0	0	0
Numerator	$ (1)	$ 0	$ (3)	$ (5)
Weighted average common stock outstanding	43,808	42,708	43,775	42,674
Basic earnings per share, Discontinued Operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00