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Earnings Per Common Share | 3 Months Ended
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Mar. 31, 2022
Earnings Per Share [Abstract] |
Earnings Per Common Share | 9. Earnings Per Common Share The Company calculates earnings per share using the two-class method. The two-class method allocates net income to each class of common stock and participating security according to common dividends declared and participation rights in undistributed earnings. Participating securities consist of nonvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. A summary of the information used in the computation of earnings per common share follows.
|  | Three Months Ended |  |
|  | March 31, |  |
(in thousands, except per share data) |  | 2022 |  |  | 2021 |  |
Numerator: |  |  |  |  |  |  |
Net income to common shareholders |  | $ | 123,478 |  |  | $ | 107,172 |  |
Net income allocated to participating securities - basic and diluted |  |  | 1,918 |  |  |  | 2,337 |  |
Net income allocated to common shareholders - basic and diluted |  | $ | 121,560 |  |  | $ | 104,835 |  |
Denominator: |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 86,660 |  |  |  | 86,752 |  |
Dilutive potential common shares |  |  | 276 |  |  |  | 53 |  |
Weighted-average common shares - diluted |  |  | 86,936 |  |  |  | 86,805 |  |
Earnings per common share: |  |  |  |  |  |  |
Basic |  | $ | 1.40 |  |  | $ | 1.21 |  |
Diluted |  | $ | 1.40 |  |  | $ | 1.21 |  |
Potential common shares consist of stock options, nonvested performance-based awards, nonvested restricted stock units, and nonvested restricted share awards deferred under the Company’s nonqualified deferred compensation plan. These potential common shares do not enter into the calculation of diluted earnings per share if the impact would be antidilutive, i.e., increase earnings per share or reduce a loss per share. For the three months ended March 31, 2022 and 2021, antidilutive potential common shares with weighted averages of 231 and 7,191, respectively, were excluded from the computation of earnings per common share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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