Income Taxes (Reconciliation Of Income Tax Rates) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Statutory rate	35.00%	35.00%	35.00%
Foreign tax rate differential	0.80%	(2.20%)	(1.70%)
State income tax, net of federal benefit	0.30%	2.70%	2.60%
Non-deductible goodwill impairment	(25.20%)	0.00%	0.00%
Nondeductible expenses	(0.90%)	1.80%	0.60%
Change in liability for unrecognized tax benefits	0.40%	(0.80%)	(1.90%)
Domestic production activities deduction	1.00%	(2.20%)	(1.20%)
Other	0.70%	0.00%	0.20%
Effective income tax rate, total	12.10%	34.30%	33.60%