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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Common Share |  |  |  |  |
Number of shares awarded under Pay-for-Performance program included in diluted weighted average number of shares |  | 113,584 | 107,000 | 113,584 | 107,000
Underlying number of shares awarded under Pay-for-Performance program included in calculation of diluted weighted average number of shares |  | 200,000 | 200,000 | 200,000 | 200,000
Number of shares awarded under Pay-for-Performance program included in diluted weighted average number of shares pursuant to a stockholder return metric |  | 100,000 | 100,000 | 100,000 | 100,000
Number of shares awarded under Pay-for-Performance program included in diluted weighted average number of shares pursuant to return on capital metric |  | 13,584 | 7,000 | 13,584 | 7,000
Numerator for basic and diluted earnings per share: |  |  |  |  |
Net income |  | $ 9,993 | $ 12,459 | $ 12,879 | $ 15,743
Less net income attributable to non-controlling interests |  | (21) | (18) | (42) | (16)
Less earnings allocated to unvested restricted stock | [1] | (332) | (436) | (533) | (554)
Net income available for common stockholders, basic |  | 9,640 | 12,005 | 12,304 | 15,173
Net income available for common stockholders, diluted |  | $ 9,640 | $ 12,005 | $ 12,304 | $ 15,173
Denominator for basic earnings per share: |  |  |  |  |
Weighted average common shares |  | 17,824,000 | 16,579,000 | 17,788,000 | 16,484,000
Effect of diluted securities: |  |  |  |  |
Restricted stock units awarded under Pay-for-Performance program (in shares) |  | 113,584 | 107,000 | 113,584 | 107,000
Denominator for diluted earnings per share: weighted average shares |  | 17,938,000 | 16,686,000 | 17,902,000 | 16,591,000
Earnings per common share, basic |  | $ 0.54 | $ 0.72 | $ 0.69 | $ 0.92
Earnings per common share, diluted |  | $ 0.54 | $ 0.72 | $ 0.69 | $ 0.91
Net income attributable to One Liberty Properties, Inc. common stockholders, net of non-controlling interests |  | $ 9,972 | $ 12,441 | $ 12,837 | $ 15,727
[1] | Represents an allocation of distributed earnings to unvested restricted stock which, as participating securities, are entitled to receive dividends

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