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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Schedule of computation of basic and diluted earnings per common share | The following table sets forth the computation of basic and diluted earnings per common share:
Year ended December 31 (In thousands, except share data) |  | 2022 |  | 2021 |  | 2020
Numerator: |  |  |  |  |  |
Net income |  | $ | 148,351 |  |  | $ | 153,945 |  |  | $ | 127,923 |
Denominator: |  |  |  |  |  |
Weighted-average common shares outstanding |  | 16,246,009 |  |  | 16,291,016 |  |  | 16,302,825 |
Effect of dilutive PBRSUs and TBRSUs |  | 119,300 |  |  | 134,190 |  |  | 104,677 |
Weighted-average common shares outstanding adjusted for the effect of dilutive PBRSUs and TBRSUs |  | 16,365,309 |  |  | 16,425,206 |  |  | 16,407,502 |
Earnings per common share: |  |  |  |  |  |
Basic earnings per common share |  | $ | 9.13 |  |  | $ | 9.45 |  |  | $ | 7.85 |
Diluted earnings per common share |  | $ | 9.06 |  |  | $ | 9.37 |  |  | $ | 7.80 |

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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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