Income Taxes (Reconciliation Of Effective Tax Rate, By Percentage) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Tax at U.S. statutory rate	35.00%	35.00%	35.00%
Surtax exemption	(1.10%)	(0.70%)	(5.40%)
State income taxes, net of federal benefit	0.60%	1.00%	19.10%
Foreign income taxes, net of foreign tax credits	(3.60%)	7.80%	3.30%
Impairment of goodwill			116.20%
Other nondeductible items	0.00%	3.10%	4.90%
Effect of (decrease) increase in uncertain tax positions	(1.40%)	(10.20%)	7.30%
Federal credits	15.10%
Change in valuation allowance	(35.20%)
Other	(2.20%)	2.30%	6.40%
Effective tax rate	7.20%	38.30%	186.80%