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Earnings per Share ("EPS") (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Numerator    
Net (loss) income $ (34,381) $ 74,809
Less net (loss) income attributable to noncontrolling interests (808) 5,566
Net (loss) income attributable to the Company (33,573) 69,243
Allocation of earnings to participating securities (244) (184)
Numerator for basic and diluted EPS—net income attributable to common stockholders $ (33,817) $ 69,059
Denominator    
Denominator for basic EPS—weighted average number of common shares outstanding (in shares) 141,024,000 143,596,000
Effect of dilutive securities(1):    
Share and unit-based compensation plans (in shares) 26,000 59,000
Denominator for diluted EPS—weighted average number of common shares outstanding (in shares) 141,050,000 143,655,000
Earnings per common share—attributable to common stockholders:    
Basic (in dollars per share) $ (0.24) $ 0.48
Diluted (in dollars per share) $ (0.24) $ 0.48
Convertible non-participating preferred units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Securities excluded from Diluted EPS (in shares) 90,619 90,619
Partnership unit    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Securities excluded from Diluted EPS (in shares) 10,291,217 10,591,428