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Net Income Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Net Income Per Common Share | The following table sets forth the computation of basic and diluted net income per common share:
| Year Ended December 31
| 2023 |  | 2022 |  | 2021
| (thousands, except per-share data)
Net income | $ | 483,656 |  |  | $ | 857,658 |  |  | $ | 712,486 |
Weighted average common shares outstanding during the period (for basic calculation) | 39,649 |  |  | 39,526 |  |  | 39,420 |
Dilutive effect of other potential common shares | 252 |  |  | 246 |  |  | 226 |
Weighted average common shares and potential common shares (for diluted calculation) | 39,901 |  |  | 39,772 |  |  | 39,646 |
Net income per common share - Basic | $ | 12.20 |  |  | $ | 21.70 |  |  | $ | 18.07 |
Net income per common share - Diluted | $ | 12.12 |  |  | $ | 21.56 |  |  | $ | 17.97 |

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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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