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Earnings Per Share - Summary of Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Numerator:    
Net income attributable to common stockholders $ 1,114 $ 372
Earnings allocated to unvested participating securities (18) (14)
Numerator for income per common share - basic and diluted $ 1,096 $ 358
Denominator:    
Denominator for basic income per common share - weighted average shares 240,311,744 230,924,271
Effect of dilutive employee stock options and restricted share awards 27,000 34,000
Denominator for diluted income per common share - weighted average shares 240,338,698 230,958,441
Income per common share - basic and diluted $ 0.00 $ 0.00