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Income Taxes Income Taxes Details 1 (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
[1]
Sep. 30, 2020
[1]
Jun. 30, 2020
[1]
Mar. 31, 2020
[1]
Dec. 31, 2019
[1]
Sep. 30, 2019
[1]
Jun. 30, 2019
[1]
Mar. 31, 2019
[1]
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Taxes [Abstract]                      
United States                 $ 633,608 $ 441,579 $ 399,123
Foreign                 28,452 22,853 42,609
Income from continuing operations before income taxes $ 249,455 $ 164,843 $ 141,723 $ 106,039 $ 195,172 $ 72,869 $ 96,083 $ 100,308 $ 662,060 $ 464,432 $ 441,732
[1] Includes Gains (losses) on divestitures and impairment charges, net, as described in Note 16.