Annual report pursuant to Section 13 and 15(d)

Income Taxes (Components Of The Provision For Income Taxes) (Details)

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Income Taxes (Components Of The Provision For Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Federal $ 169,053 $ 126,903 $ 120,437
State 25,644 20,111 21,248
Total current income tax expense (benefit) 194,697 147,014 141,685
Federal (81,551) 29,354 38,549
State (1,088) 5,454 5,093
Total deferred income tax expense (benefit) (82,639) 34,808 43,642
Total provision for income taxes $ 112,058 $ 181,822 $ 185,327