Income Taxes (Reconciliation Of Effective Income Tax Rate Statutory Federal Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
US Federal income tax statutory rate	21.00%	35.00%	34.00%
Foreign income taxes	8.90%	(9.10%)	(10.00%)
State income tax (net of federal benefit)	0.90%	2.40%	0.20%
Meals, entertainment, gifts & giveaways	3.10%	2.00%	1.10%
Statutory to US GAAP adjustments, including foreign currency	(16.00%)	2.80%	0.50%
Valuation allowance		(45.90%)	(17.40%)
Unrecognized tax benefit	1.10%	0.10%
Stock options	2.50%	1.60%	1.60%
Tax Act impact	7.00%	43.50%
Permanent and other items	3.90%	4.20%	1.50%
Total provision for income taxes	32.40%	36.60%	11.50%