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Earnings Per Common Share and Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Common Share, Basic and Diluted | The following table sets forth the computation of earnings per common share and earnings per common share - assuming dilution:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
| (Dollars in thousands, except per share data)
Numerator: |  |  |  |  |  |  |
Net income available to common stockholders - numerator for earnings per common share | $ | 141,947 |  |  | $ | 661,250 |  |  | $ | 348,099 |  |  | $ | 644,207 |
Denominator: |  |  |  |  |  |  |
Weighted average common shares outstanding | 92,478,154 |  |  | 91,861,167 |  |  | 94,325,984 |  |  | 91,769,932 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options and deferred compensation agreements | 237,076 |  |  | 55,926 |  |  | 224,519 |  |  | 85,493 |
Restricted stock and restricted stock units | 328,430 |  |  | 246,179 |  |  | 316,897 |  |  | 215,310 |
Denominator for earnings per common share - assuming dilution | 93,043,660 |  |  | 92,163,272 |  |  | 94,867,400 |  |  | 92,070,735 |
Earnings per common share | $ | 1.53 |  |  | $ | 7.20 |  |  | $ | 3.69 |  |  | $ | 7.02 |
Earnings per common share - assuming dilution | $ | 1.53 |  |  | $ | 7.17 |  |  | $ | 3.67 |  |  | $ | 7.00 |

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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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