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Description Of Business And Basis Of Presentation (Exchange Rates) (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Canadian Dollar (CAD) [Member]          
Currency [Line Items]          
Ending rates 1.2480   1.2480   1.3427
Average Rates 1.2531 1.3049 1.3072 1.3224  
Average Rates % Change 4.00%   1.10%    
Euros (EUR) [Member]          
Currency [Line Items]          
Ending rates 0.8466   0.8466   0.9476
Average Rates 0.8512 0.8965 0.8997 0.8962  
Average Rates % Change 5.10%   (0.40%)    
Polish Zloty (PLN) [Member]          
Currency [Line Items]          
Ending rates 3.6506   3.6506   4.2065
Average Rates 3.6219 3.8890 3.8379 3.9057  
Average Rates % Change 6.90%   1.70%    
British Pound (GBP) [Member]          
Currency [Line Items]          
Ending rates 0.7466   0.7466   0.8106
Average Rates 0.7641 0.7619 0.7845 0.7194  
Average Rates % Change (0.30%)   (9.00%)