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Summary of Movement in Temporary Differences of Deferred Tax Liabilities (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance $ 20,138 $ 20,665
Recognized in net loss (earnings) (8,599) 5,664
Effect of foreign currency exchange differences (187) (793)
Recognized in other comprehensive income   (5,398)
Ending Balance 11,352 20,138
Property, Plant and Equipment and Intangibles [member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance 393,631 426,934
Recognized in net loss (earnings) (32,562) (28,600)
Effect of foreign currency exchange differences (1,686) (4,703)
Ending Balance 359,383 393,631
Partnership Deferrals [member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance 2,532 850
Recognized in net loss (earnings) 8,550 1,682
Ending Balance 11,082 2,532
Other Deferred Tax Liabilities [Member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance 6,322 7,926
Recognized in net loss (earnings) (99) (1,601)
Effect of foreign currency exchange differences (2) (3)
Ending Balance 6,221 6,322
Losses [member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance (370,439) (402,025)
Recognized in net loss (earnings) 28,528 33,141
Effect of foreign currency exchange differences 1,505 3,843
Recognized in other comprehensive income   (5,398)
Ending Balance (340,406) (370,439)
Debt Issue Costs [Member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance 2,665 3,280
Recognized in net loss (earnings) (1,208) (615)
Ending Balance 1,457 2,665
Long-Term Incentive Plan [member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance (4,956) (6,131)
Recognized in net loss (earnings) (9,291) 1,120
Effect of foreign currency exchange differences (17) 55
Ending Balance (14,264) (4,956)
Other Deferred Tax Liabilities [Member]    
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]    
Beginning Balance (9,617) (10,169)
Recognized in net loss (earnings) (2,517) 537
Effect of foreign currency exchange differences 13 15
Ending Balance $ (12,121) $ (9,617)