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Earnings per Share (EPS) (Tables) | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Reconciliation of Net Income and Weighted Average Common Shares Outstanding used in Computations of Basic and Diluted Earnings per Common Share | The following table reconciles the net income and the weighted average common shares outstanding used in the computations of basic and diluted earnings per common share:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(In thousands, except per share amounts) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Net income |  | $ | 164,215 |  |  | $ | 176,175 |  |  | $ | 534,987 |  |  | $ | 561,503 |
Basic weighted average shares outstanding |  | 97,400 |  |  | 105,266 |  |  | 100,086 |  |  | 105,539 |
Dilutive effect of nonvested shares |  | 1,119 |  |  | 1,288 |  |  | 1,069 |  |  | 1,161 |
Diluted weighted average shares outstanding |  | 98,519 |  |  | 106,554 |  |  | 101,155 |  |  | 106,700 |
Basic earnings per share |  | $ | 1.69 |  |  | $ | 1.67 |  |  | $ | 5.35 |  |  | $ | 5.32 |
Diluted earnings per share |  | $ | 1.67 |  |  | $ | 1.65 |  |  | $ | 5.29 |  |  | $ | 5.26 |
Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | Nonvested performance-based share awards are considered contingently issuable for purposes of the EPS calculation. The 2025, 2024 and 2023 performance-based share awards vest based upon our compounded annual book value per share growth percentage and relative total shareholder return during a three-year performance period. The following table summarizes the performance-based shares issuable if the reporting date was the end of the contingency period:
|  | 2025 Performance-Based Grants |  | 2024 Performance-Based Grants |  | 2023 Performance-Based Grants |  | 2022 Performance-Based Grants
Reporting Date |  | Percent Issuable Relative to Target |  | As a Percent of Shares Issued |  | Percent Issuable Relative to Target |  | As a Percent of Shares Issued |  | Percent Issuable Relative to Target |  | As a Percent of Shares Issued |  | Percent Issuable Relative to Target |  | As a Percent of Shares Issued
September 30, 2025 |  | 200% |  | 100% |  | 134% |  | 67% |  | 197% |  | 98.5% |  | (1) |  | (1)
September 30, 2024 |  |  |  |  |  | 181% |  | 90.5% |  | 200% |  | 100% |  | 200% |  | 100%
(1) The 2022 performance based awards vested at 168% relative to target on March 1, 2025.

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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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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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