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Significant Accounting Policies (Schedule Of Exchange Rates To US Dollar) (Details) | 12 Months Ended
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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% |

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