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Net Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2023
Earnings Per Share [Abstract] |
Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Share | The following table sets forth the computation of basic and diluted net income (loss) per share (in millions of dollars, except share and per share amounts):
|  | Quarter Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 18.3 |  |  | $ | (13.8 | ) |  | $ | 34.2 |  |  | $ | (5.7 | )
Denominator – Weighted-average common shares outstanding (in thousands): |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 15,974 |  |  |  | 15,899 |  |  |  | 15,957 |  |  |  | 15,883 |
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares 1 |  |  | 109 |  |  |  | — |  |  |  | 133 |  |  |  | — |
Diluted |  |  | 16,083 |  |  |  | 15,899 |  |  |  | 16,090 |  |  |  | 15,883 |
Net income (loss) per common share, Basic: |  | $ | 1.14 |  |  | $ | (0.87 | ) |  | $ | 2.14 |  |  | $ | (0.36 | )
Net income (loss) per common share, Diluted: |  | $ | 1.14 |  |  | $ | (0.87 | ) |  | $ | 2.12 |  |  | $ | (0.36 | )
1 Quantities in the following discussion are denoted in whole shares. During the quarter and six months ended June 30, 2023, approximately 42,000 and 16,000 shares, respectively, were excluded from the weighted-average diluted shares computation as their inclusion would have been anti‑dilutive. For the quarter and six months ended June 30, 2022, approximately 157,000 and 161,000 shares, respectively, were excluded from the computation of net loss per share as their inclusion would have been anti-dilutive.

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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