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Capital Management - Additional Information (Detail)
$ in Thousands
Dec. 31, 2023
CAD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CAD ($)
Dec. 31, 2022
USD ($)
Disclosure Of Capitalisation [Line Items]        
Cash $ 54,182   $ 21,587  
Credit facility drawn 929,047      
Senior Credit Facility [Member]        
Disclosure Of Capitalisation [Line Items]        
Line of credit borrowing capacity   $ 447,000,000   $ 500,000,000
Credit facility drawn   0   44,000,000
Letters of Credit [Member]        
Disclosure Of Capitalisation [Line Items]        
Change in borrowings capacity   56,000,000   56,000,000
Secured Facility [Member]        
Disclosure Of Capitalisation [Line Items]        
Line of credit facility, remaining capacity   40,000,000    
Letters of credit outstanding 20,000 28,000,000 28,000 31,000,000
Secured Operating Facility [Member]        
Disclosure Of Capitalisation [Line Items]        
Line of credit borrowing capacity 115,000   $ 115,000  
40.0 Million Secured Operating Facilities [Member]        
Disclosure Of Capitalisation [Line Items]        
Line of credit facility, remaining capacity $ 40,000      
15.0 Million Secured Operating Facilities [Member]        
Disclosure Of Capitalisation [Line Items]        
Line of credit borrowing capacity   15,000,000    
Credit facility drawn   $ 0    
Line of credit outstanding       $ 0