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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) | Selected Quarterly Financial Data (Unaudited)
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 |
The sum of the quarterly earnings per common share amounts for 2020 and 2019 may not equal the earnings per common share due to rounding. The fourth quarter of 2019 includes: a gain of $13.0 million related to the fair value adjustment of a minority investment, a write-off of property, plant and equipment costs of $1.8 million and restructuring related costs of $2.8 million.

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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