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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Summary of Basic and Diluted Earnings Per Share | The following table summarizes the basic and diluted earnings per share calculations:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income attributable to Cactus Inc.—basic | $ | 49,593 |  |  | $ | 34,446 |  |  | $ | 85,612 |
Net income attributable to non-controlling interest(1) | 13,744 |  |  | 19,934 |  |  | 56,012 |
Net income attributable to Cactus Inc.—diluted(1) | $ | 63,337 |  |  | $ | 54,380 |  |  | $ | 141,624 |
Denominator: |  |  |  |  |
Weighted average Class A shares outstanding—basic | 55,398 |  |  | 47,457 |  |  | 44,983 |
Effect of dilutive shares | 20,709 |  |  | 28,038 |  |  | 30,370 |
Weighted average Class A shares outstanding—diluted | 76,107 |  |  | 75,495 |  |  | 75,353 |
Earnings per Class A share—basic | $ | 0.90 |  |  | $ | 0.73 |  |  | $ | 1.90 |
Earnings per Class A share—diluted(1) | $ | 0.83 |  |  | $ | 0.72 |  |  | $ | 1.88 |
(1)The numerator is adjusted in the calculation of diluted earnings per share under the if-converted method to include net income attributable to the non-controlling interest calculated as its pre-tax income adjusted for a corporate effective tax rate of 27.0% for the year ended December 31, 2021 and 24.0% for the years ended December 31, 2020 and 2019.

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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