Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Diluted earnings per share
Loss from discontinued operations, net of income taxes	$ (2)	$ 0	$ (2)	$ (5)
Net income	28,433	(12,584)	34,209	7,154
Less: net income attributable to noncontrolling interests	5,136	5,025	9,446	11,250
Numerator	$ 23,297	$ (17,609)	$ 24,763	$ (4,096)
Weighted average common stock outstanding	43,798	42,682	43,758	42,657
Effect of dilutive securities	215	0	217	0
Denominator, Net, Diluted	44,013	42,682	43,975	42,657
Diluted earnings (loss) per share, Net	$ 0.53	$ (0.41)	$ 0.56	$ (0.10)
Continuing Operations [Member]
Diluted earnings per share
Income (loss)	$ 28,435	$ (12,584)	$ 34,211	$ 7,159
Less: net income attributable to noncontrolling interests	5,136	5,025	9,446	11,250
Numerator	$ 23,299	$ (17,609)	$ 24,765	$ (4,091)
Weighted average common stock outstanding	43,798	42,682	43,758	42,657
Effect of dilutive securities	215	0	217	0
Denominator, Net, Diluted	44,013	42,682	43,975	42,657
Diluted earnings per share, Continuing Operations	$ 0.53	$ (0.41)	$ 0.56	$ (0.10)
Discontinued Operations [Member]
Diluted earnings per share
Loss from discontinued operations, net of income taxes	$ (2)	$ 0	$ (2)	$ (5)
Less: net income attributable to noncontrolling interests	0	0	0	0
Numerator	$ (2)	$ 0	$ (2)	$ (5)
Weighted average common stock outstanding	43,798	42,682	43,758	42,657
Effect of dilutive securities	215	0	217	0
Denominator, Net, Diluted	44,013	42,682	43,975	42,657
Diluted earnings per share, Discontinued Operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00