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Earnings per Share (EPS) (Tables) | 12 Months Ended
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Dec. 31, 2022
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 for the years ended December 31:
(In thousands, except per share amounts) |  | 2022 |  | 2021 |  | 2020
Net income |  | $ | 831,353 |  |  | $ | 681,783 |  |  | $ | 413,041 |
Basic weighted average shares outstanding |  | 107,205 |  |  | 111,164 |  |  | 106,098 |
Dilutive effect of nonvested shares |  | 448 |  |  | 391 |  |  | 278 |
Diluted weighted average shares outstanding |  | 107,653 |  |  | 111,555 |  |  | 106,376 |
Basic earnings per share |  | $ | 7.75 |  |  | $ | 6.13 |  |  | $ | 3.89 |
Diluted earnings per share |  | $ | 7.72 |  |  | $ | 6.11 |  |  | $ | 3.88 |
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 2022 and 2021 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 performance-based share awards granted in years before 2021 vest based upon our compounded annual book value per share growth percentage 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.
|  | 2022 Performance-Based Grants |  | 2021 Performance-Based Grants |  | 2020 Performance-Based Grants |  | 2019 Performance-Based Grants |  | 2018 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 and Shares Issued
December 31, 2022 |  | 131% |  | 66% |  | 100% |  | 50% |  | 100% |  |  |  |
December 31, 2021 |  |  |  |  |  | 100% |  | 50% |  | 100% |  | 100% |  |
December 31, 2020 |  |  |  |  |  |  |  |  |  | 25% |  | 100% |  | 100%

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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -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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