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Accrued liabilities (Details) (CAD)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Payables and Accruals [Abstract]    
Accrued interest payable 1,836 4,758
Payroll liabilities 11,970 9,423
Liabilities related to equipment leases 190 760
Income and other taxes payable 1,659 1,332
Accrued liabilities 15,655 16,273