Significant Accounting Policies (Schedule Of Exchange Rates To US Dollar) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Canadian Dollar (CAD) [Member]
Currency [Line Items]
Ending Rates	1.2678	1.2732
Average Rates	1.2537	1.3412	1.3268
Average Rates % Change	6.50%	(1.10%)
Euros (EUR) [Member]
Currency [Line Items]
Ending Rates	0.8810	0.8157
Average Rates	0.8456	0.8776	0.8934
Average Rates % Change	3.60%	1.80%
Polish Zloty (PLN) [Member]
Currency [Line Items]
Ending Rates	4.0492	3.7136
Average Rates	3.8608	3.8989	3.8378
Average Rates % Change	1.00%	(1.60%)
British Pound (GBP) [Member]
Currency [Line Items]
Ending Rates	0.7400	0.7325
Average Rates	0.7270	0.7798	0.7836
Average Rates % Change	6.80%	0.50%