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Earnings per Share - Net Income Attributable to Archrock Common Stockholders (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Summary of net income attributable to Archrock common stockholders used in the calculation of basic and diluted income per common share |  |  |  |
Income (loss) from continuing operations attributable to Archrock stockholders | $ 9,974 | $ (10,181) | $ 8,095 | $ (28,553)
Loss from discontinued operations, net of tax | 0 | (54) | 0 | (54)
Net income (loss) attributable to Archrock stockholders | 9,974 | (10,235) | 8,095 | (28,607)
Less: Net income attributable to participating securities | (241) | (179) | (554) | (513)
Net income (loss) attributable to Archrock common stockholders | $ 9,733 | $ (10,414) | $ 7,541 | $ (29,120)
Potential shares of common stock included in computing diluted income attributable to Exterran common stockholders per common share |  |  |  |
Weighted average common shares outstanding including participating securities (in shares) | 129,486 | 70,952 | 104,489 | 70,847
Less: Weighted average participating securities outstanding (in shares) | (1,644) | (1,308) | (1,576) | (1,327)
Weighted average common shares outstanding — used in basic income (loss) per common share (in shares) | 127,842 | 69,644 | 102,913 | 69,520
Net dilutive potential common shares issuable: |  |  |  |
Weighted average common shares outstanding - used in diluted income (loss) per common share (in shares) | 127,955 | 69,644 | 103,013 | 69,520
On the settlement of employee stock purchase plan shares |  |  |  |
Net dilutive potential common shares issuable: |  |  |  |
On exercise of options (in shares) | 2 |  | 4 |
On exercise of options |  |  |  |
Net dilutive potential common shares issuable: |  |  |  |
On exercise of options (in shares) | 111 |  | 96 |

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