Description Of Business And Basis Of Presentation (Average Exchange Rates) (Details)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Canadian Dollar (CAD) [Member]
Currency [Line Items]
Average Rates	1.2665	1.3429
Average Rates % Change	5.70%
Euros (EUR) [Member]
Currency [Line Items]
Average Rates	0.8296	0.9074
Average Rates % Change	8.60%
Polish Zloty (PLN) [Member]
Currency [Line Items]
Average Rates	3.7693	3.9221
Average Rates % Change	3.90%
British Pound (GBP) [Member]
Currency [Line Items]
Average Rates	0.7253	0.7816
Average Rates % Change	7.20%