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Description Of Business And Basis Of Presentation (Average Exchange Rates) (Details) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Canadian Dollar (CAD) [Member] |  |  |  |
Currency [Line Items] |  |  |  |
Average Rates | 1.2286 | 1.3863 | 1.2476 | 1.3646
Average Rates % Change | 11.40% |  | 8.60% |
Euros (EUR) [Member] |  |  |  |
Currency [Line Items] |  |  |  |
Average Rates | 0.8302 | 0.9085 | 0.8299 | 0.9080
Average Rates % Change | 8.60% |  | 8.60% |
Polish Zloty (PLN) [Member] |  |  |  |
Currency [Line Items] |  |  |  |
Average Rates | 3.7627 | 4.0959 | 3.7660 | 4.0090
Average Rates % Change | 8.10% |  | 6.10% |
British Pound (GBP) [Member] |  |  |  |
Currency [Line Items] |  |  |  |
Average Rates | 0.7156 | 0.8060 | 0.7205 | 0.7938
Average Rates % Change | 11.20% |  | 9.20% |

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