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Accrued liabilities
12 Months Ended
Dec. 31, 2014
Payables and Accruals [Abstract]  
Accrued liabilities
Accrued liabilities
 
 
December 31, 2014

 
December 31, 2013

Accrued interest payable
 
$
1,514

 
$
1,836

Payroll liabilities
 
9,845

 
11,970

Liabilities related to equipment leases
 
786

 
190

Current portion of deferred gain on sale leaseback (note 16(d))
 
93

 

Dividends payable (note 17(d))
 
697

 

Income and other taxes payable
 
2,062

 
1,659

 
 
$
14,997

 
$
15,655