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Debt (Tables)
12 Months Ended
Dec. 31, 2011
Debt [Abstract]  
Schedule Of Debt
Schedule Of Long Term Debt Payments In Each Of The Next Five Years And Thereafter
Schedule Of Effective Interest Rate On LIBOR And Prime Loans Based On Average Aggregate Availability

Average Aggregate Availability

(in millions of U.S. dollars)

   ABR
Spread
    Canadian Prime
Spread
    Eurodollar
Spread
    CDOR
Spread
    LIBOR
Spread
 

Over $150

     1.50     1.50     2.50     2.50     2.50

$75 - 150

     1.75     1.75     2.75     2.75     2.75

Under $75

     2.00     2.00     3.00     3.00     3.00