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Significant Accounting Policies (Exchange Rates) (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Canadian Dollar [Member] |  |  |
Currency [Line Items] |  |  |
Ending rates | 1.3427 | 1.3840 |
Average Rates | 1.3256 | 1.2786 | 1.1046
Average Rates % Change | (3.70%) | (15.80%) |
Euros [Member] |  |  |
Currency [Line Items] |  |  |
Ending rates | 0.9476 | 0.9209 |
Average Rates | 0.9041 | 0.9014 | 0.7539
Average Rates % Change | (0.30%) | (19.60%) |
Polish Zloty [Member] |  |  |
Currency [Line Items] |  |  |
Ending rates | 4.2065 | 3.9464 |
Average Rates | 3.9455 | 3.7706 | 3.1558
Average Rates % Change | (4.60%) | (19.50%) |

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- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
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