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v3.20.1

Significant Accounting Policies (Average Exchange Rates) (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Canadian Dollar (CAD) [Member] |  |  |
Currency [Line Items] |  |  |
Average Rates | 1.3268 | 1.2960 | 1.2981
Average Rates % Change | (2.40%) | 0.20% |
Euros (EUR) [Member] |  |  |
Currency [Line Items] |  |  |
Average Rates | 0.8934 | 0.8473 | 0.8871
Average Rates % Change | (5.40%) | 4.50% |
Polish Zloty (PLN) [Member] |  |  |
Currency [Line Items] |  |  |
Average Rates | 3.8378 | 3.6103 | 3.7764
Average Rates % Change | (6.30%) | 4.40% |
British Pound (GBP) [Member] |  |  |
Currency [Line Items] |  |  |
Average Rates | 0.7836 | 0.7497 | 0.7767
Average Rates % Change | (4.50%) | 3.50% |

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