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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Selected Quarterly Financial Data |
Fiscal Quarters Year Ended December 31, 2020 |  | First |  | Second |  | Third |  | Fourth
Revenues, net |  | $ | 661,093 |  |  | $ | 525,146 |  |  | $ | 585,283 |  |  | $ | 617,333 |
Operating income |  | 200,983 |  |  | 212,811 |  |  | 264,532 |  |  | 293,939 |
Net income |  | 147,060 |  |  | 158,488 |  |  | 188,817 |  |  | 209,851 |
Basic earnings per share |  | $ | 1.73 |  |  | $ | 1.89 |  |  | $ | 2.26 |  |  | $ | 2.51 |
Diluted earnings per share |  | 1.67 |  |  | 1.83 |  |  | 2.19 |  |  | 2.44 |
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Basic shares |  | 84,902 |  |  | 83,895 |  |  | 83,719 |  |  | 83,514 |
Diluted shares |  | 88,205 |  |  | 86,570 |  |  | 86,273 |  |  | 85,846 |
Fiscal Quarters Year Ended December 31, 2019 |  | First |  | Second |  | Third |  | Fourth
Revenues, net |  | $ | 621,825 |  |  | $ | 647,094 |  |  | $ | 681,048 |  |  | $ | 698,881 |
Operating income |  | 284,176 |  |  | 297,317 |  |  | 329,141 |  |  | 320,796 |
Net income |  | 172,107 |  |  | 261,651 |  |  | 225,805 |  |  | 235,510 |
Earnings per share: |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 2.00 |  |  | $ | 3.03 |  |  | $ | 2.61 |  |  | $ | 2.72 |
Diluted earnings per share |  | 1.93 |  |  | 2.90 |  |  | 2.49 |  |  | 2.60 |
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Basic shares |  | 85,941 |  |  | 86,360 |  |  | 86,662 |  |  | 86,600 |
Diluted shares |  | 89,244 |  |  | 90,131 |  |  | 90,522 |  |  | 90,427 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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