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Earnings Per Share | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Earnings Per Share |
16. | EARNINGS PER SHARE
Basic net income per share attributable to Sterling common stockholders is computed by dividing net income attributable to Sterling common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income per common share attributable to Sterling common stockholders is the same as basic net income 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 earnings per share computations for net income attributable to Sterling common stockholders:
| Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income attributable to Sterling common stockholders | $ | 62,645 |  |  | $ | 42,306 |  |  | $ | 39,901 |
Denominator: |  |  |  |  |
Weighted average common shares outstanding — basic | 28,600 |  |  | 27,859 |  |  | 26,671 |
Shares for dilutive unvested stock and warrants | 501 |  |  | 336 |  |  | 448 |
Weighted average common shares outstanding — diluted | 29,101 |  |  | 28,195 |  |  | 27,119 |
Basic net income per share attributable to Sterling common stockholders | $ | 2.19 |  |  | $ | 1.52 |  |  | $ | 1.50 |
Diluted net income per share attributable to Sterling common stockholders | $ | 2.15 |  |  | $ | 1.50 |  |  | $ | 1.47 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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