Description Of Business And Basis Of Presentation (Average Exchange Rates) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Canadian Dollar (CAD) [Member]
Currency [Line Items]
Ending rates	1.2945		1.2945		1.2545
Average Rates	1.3068	1.2531	1.2874	1.3072
Average Rates % Change	(4.30%)		1.50%
Euros (EUR) [Member]
Currency [Line Items]
Ending rates	0.8619		0.8619		0.8334
Average Rates	0.8601	0.8512	0.8377	0.8997
Average Rates % Change	(1.10%)		6.90%
Polish Zloty (PLN) [Member]
Currency [Line Items]
Ending rates	3.6395		3.6395		3.4841
Average Rates	3.6981	3.6219	3.5581	3.8379
Average Rates % Change	(2.10%)		7.30%
British Pound (GBP) [Member]
Currency [Line Items]
Ending rates	0.7671		0.7671		0.7396
Average Rates	0.7676	0.7641	0.7405	0.7845
Average Rates % Change	(0.50%)		5.60%