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Net Income (Loss) Per Share Attributable to Sterling Common Stockholders | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share Attributable to Sterling Common Stockholders | Net Income (Loss) Per Share Attributable to Sterling Common Stockholders Basic net income (loss) per share attributable to Sterling common stockholders is computed by dividing net income (loss) attributable to Sterling common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per common share attributable to Sterling common stockholders is the same as basic net income (loss) per share attributable to Sterling common stockholders but includes dilutive unvested stock and warrants using the treasury stock method. The following table reconciles the numerators and denominators of the basic and diluted per common share computations for net income (loss) attributable to Sterling common stockholders (amounts in thousands, except per share data):
| Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Numerator: |  |  |  |  |
Net income (loss) attributable to Sterling common stockholders before noncontrolling interest revaluation | $ | 11,617 |  |  | $ | (9,238 | ) |  | $ | (20,402 | )
Revaluation of a noncontrolling interest due to a new agreement | — |  |  | — |  |  | (18,774 | )
| $ | 11,617 |  |  | $ | (9,238 | ) |  | $ | (39,176 | )
Denominator: |  |  |  |  |
Weighted average common shares outstanding — basic | 26,274 |  |  | 23,140 |  |  | 19,375 |
Shares for dilutive unvested stock | 438 |  |  | — |  |  | — |
Weighted average common shares outstanding and assumed conversions— diluted | 26,712 |  |  | 23,140 |  |  | 19,375 |
Basic net income (loss) per share attributable to Sterling common stockholders | $ | 0.44 |  |  | $ | (0.40 | ) |  | $ | (2.02 | )
Diluted net income (loss) per share attributable to Sterling common stockholders | $ | 0.43 |  |  | $ | (0.40 | ) |  | $ | (2.02 | )
In accordance with the treasury stock method, approximately, 0.4 million and 0.4 million shares of unvested stock were excluded from the diluted weighted average common shares outstanding in 2016 and 2015, respectively, as the Company incurred a loss in these years and the impact of such shares would have been antidilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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