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Income Taxes (Schedule Of Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Statutory U.S. federal income tax rate	35.00%	35.00%	35.00%
State income tax, net of related federal income tax benefit	4.20%	4.10%	4.10%
Federal credits	(0.50%)		(0.80%)
Valuation allowance	0.40%	0.30%	0.10%
Prior period adjustments	(0.40%)	(0.10%)	0.10%
Effective income tax rates	38.70%	39.30%	38.50%

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

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

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