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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
Schedule of Loss Per Share | The following table presents the components of basic and diluted earnings per share (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Net earnings attributable to Kirby |  | $ | 89,968 |  |  | $ | 62,964 |  |  | $ | 243,890 |  |  | $ | 161,029 |
Undistributed earnings allocated to restricted shares |  |  | (24 | ) |  |  | (31 | ) |  |  | (36 | ) |  |  | (50 | )
Earnings available to Kirby common stockholders – basic |  |  | 89,944 |  |  |  | 62,933 |  |  |  | 243,854 |  |  |  | 160,979 |
Undistributed earnings allocated to restricted shares |  |  | 24 |  |  |  | 31 |  |  |  | 36 |  |  |  | 50 |
Undistributed earnings reallocated to restricted shares |  |  | (23 | ) |  |  | (31 | ) |  |  | (35 | ) |  |  | (50 | )
Earnings available to Kirby common stockholders – diluted |  | $ | 89,945 |  |  | $ | 62,933 |  |  | $ | 243,855 |  |  | $ | 160,979 |
Shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common stock issued and outstanding |  |  | 57,767 |  |  |  | 59,413 |  |  |  | 58,138 |  |  |  | 59,739 |
Weighted average unvested restricted stock |  |  | (14 | ) |  |  | (30 | ) |  |  | (9 | ) |  |  | (18 | )
Weighted average common stock outstanding – basic |  |  | 57,753 |  |  |  | 59,383 |  |  |  | 58,129 |  |  |  | 59,721 |
Dilutive effect of stock options and restricted stock units |  |  | 433 |  |  |  | 363 |  |  |  | 397 |  |  |  | 312 |
Weighted average common stock outstanding – diluted |  |  | 58,186 |  |  |  | 59,746 |  |  |  | 58,526 |  |  |  | 60,033 |
Net earnings per share attributable to Kirby common stockholders: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.56 |  |  | $ | 1.06 |  |  | $ | 4.20 |  |  | $ | 2.70 |
Diluted |  | $ | 1.55 |  |  | $ | 1.05 |  |  | $ | 4.17 |  |  | $ | 2.68 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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