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Income Taxes (Difference In Income Tax Expense And Expected Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal income tax expense at the 'expected' rate of 35%	$ 249,714	$ 235,954	$ 201,278
State income taxes, net of federal benefit	17,150	19,565	18,210
State tax matters	(467)	884	737
Other, net	(1,565)	(2,784)	(3,073)
Total income tax expense	$ 264,832	$ 253,619	$ 217,152
Expected rate of federal income tax expense	35.00%	35.00%	35.00%

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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