Income Taxes (Reconciliation Of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. statutory federal rate applied to pretax income	35.00%	35.00%	35.00%
State and local income taxes, net of federal benefit	3.40%	3.50%	3.20%
Foreign tax rate differential	(0.40%)	0.10%	0.10%
Non-deductible expenses	2.10%	1.70%	3.80%
Domestic production activities deduction	(1.60%)	(0.90%)	(0.10%)
Other	1.20%	0.00%	1.10%
Change in valuation allowance for deferred tax assets	(0.40%)	(0.80%)	(0.10%)
Effective income tax rate	39.50%	38.80%	42.00%
State and Local Jurisdiction [Member]
Change in state tax rate	0.20%	0.20%	(1.00%)