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Net Income (Loss) Per Share Attributable to Sterling Common Stockholders (Tables) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | 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 awards 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):
|  | Three Months Ended March 31,
|  | 2018 |  | 2017
Numerator: |  |  |  |  |  |
Net income (loss) attributable to Sterling common stockholders |  | $ | 2,489 |  |  | $ | (2,257 | )
Weighted average common shares outstanding — basic |  | 26,854 |  |  | 25,022 |
Shares for dilutive unvested stock and warrants |  | 224 |  |  | — |
Weighted average common shares outstanding and incremental shares assumed repurchased— diluted |  | 27,078 |  |  | 25,022 |
Basic income (loss) per share attributable to Sterling common stockholders |  | $ | 0.09 |  |  | $ | (0.09 | )
Diluted income (loss) per share attributable to Sterling common stockholders |  | $ | 0.09 |  |  | $ | (0.09 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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