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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2022
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2022 and 2021 (in thousands, except per share data):
|  | Three Months Ended March 31, |
|  | 2022 |  |  | 2021 |
Net income |  | $ | 173,549 |  |  | $ | 173,015 |
Preferred dividends |  |  | 9,320 |  |  |  | 8,289 |
Net income available to common shareholders |  | $ | 164,229 |  |  | $ | 164,726 |
Shares for basic and diluted calculation: |  |  |  |  |  |
Average shares used in basic computation |  |  | 109,205 |  |  |  | 107,746 |
Dilutive effect of stock options and units (1) |  |  | 8,935 |  |  |  | 10,129 |
Average shares used in diluted computation |  |  | 118,140 |  |  |  | 117,875 |
Earnings per common share: |  |  |  |  |  |
Basic |  | $ | 1.50 |  |  | $ | 1.53 |
Diluted |  | $ | 1.39 |  |  | $ | 1.40 |
(1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Diluted earnings per share include units.

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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 http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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