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Income Taxes (Provision For Income Taxes/(Benefit)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Components Of Income Tax Expense Benefit Continuing Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Current taxes: Federal |  |  |  |  |  |  |  |  | $ 123,802 | $ 89,971 | $ (29,396)
Current taxes: State |  |  |  |  |  |  |  |  | 30,464 | 36,070 | (334)
Current taxes: Foreign |  |  |  |  |  |  |  |  | 1,684 | 99 | (1,734)
Current taxes: Total |  |  |  |  |  |  |  |  | 155,950 | 126,140 | (31,464)
Deferred taxes: Federal |  |  |  |  |  |  |  |  | (7,027) | 11,932 | 114,842
Deferred taxes: State |  |  |  |  |  |  |  |  | 4,266 | 2,267 | 1,728
Deferred taxes: Foreign |  |  |  |  |  |  |  |  | (4,037) | 55 | 1,559
Deferred Income Tax Expense (Benefit), Total |  |  |  |  |  |  |  |  | (6,798) | 14,254 | 118,129
Provision for income taxes | $ 31,925 | $ 40,632 | $ 38,225 | $ 38,370 | $ 41,869 | $ 36,672 | $ 31,060 | $ 30,793 | $ 149,152 | $ 140,394 | $ 86,665

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