Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
State income taxes (net of federal benefit)	(0.90%)	0.50%	(0.40%)
Other	(1.60%)	0.90%	0.80%
Consolidated effective tax rate	32.50%	36.40%	35.40%