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Acquisitions and Investments in Other Company (Tables) | 12 Months Ended
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Dec. 31, 2021
Pro Forma Results Under Acquisitions | The unaudited pro forma results are not necessarily indicative of what actually would have occurred had the acquisition been in effect for the periods presented:
|  | December 31, 2019 |
|  | (in thousands, except per share amount) |
Revenues |  | $ | 2,303,737 |
Net income |  | $ | 464,602 |
Net income per common share: |  |  |  |
Basic |  | $ | 2.73 |
Diluted |  | $ | 2.59 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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