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Capital Disclosures (Tables)
 12 Months Ended
Dec. 31, 2021
Abstract [Abstract]  
Disclosure of Reconciliation of Net debt to EBITDA ratio [Table Text Block]
Net debt to EBITDA is defined as short and long-term debt less c
a
sh and cash equivalents at the end of the period, divided by annualized EBITDA. At December 31, 2021, the
net debt to EBITDA ratio was:
 
Years ended December 31,
  
2021
 
  
2020
 
Long-term debt
   
$
331,422
 
    $ 389,712  
Cash and cash equivalents
   
 
(172,758
) 
      (95,676 ) 
    
 
 
     
 
 
  
Net debt
   
$
158,664
 
    $ 294,036  
    
 
 
     
 
 
  
Earnings before finance costs and income taxes
   
$
55,097
 
    $ 118,052  
Depreciation and amortization
   
 
87,622
 
      85,265  
    
 
 
     
 
 
  
EBITDA
   
$
142,719
 
    $ 203,317  
    
 
 
     
 
 
  
Net debt to EBITDA ratio
   
 
1.11:1
 
      1.45:1