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Earnings Per Share - Summary of Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Numerator:        
Net income (loss) attributable to common stockholders $ 3,188 $ (4,709) $ (3,306) $ (14,440)
Earnings allocated to unvested participating securities (10)   (19)  
Numerator for income (loss) per common share - basic and diluted $ 3,178 $ (4,709) $ (3,325) $ (14,440)
Denominator:        
Denominator for basic income (loss) per common share - weighted average shares 217,121,592 212,106,718 214,762,593 212,106,718
Effect of dilutive employee stock options and restricted share awards 16,000      
Denominator for diluted income (loss) per common share - weighted average shares 217,137,557 212,106,718 214,762,593 212,106,718
Income (loss) per common share - basic and diluted $ 0.01 $ (0.02) $ (0.02) $ (0.07)