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Summary of Status of Equity Incentive Plan (Detail)
 12 Months Ended
Dec. 31, 2022
shares
$ / shares
Dec. 31, 2022
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2020
shares
Canadian Share Options [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Options Outstanding, Beginning balance | shares 115,605 115,605 148,665 148,665  
Options Outstanding, Exercised | shares (26,705) (26,705)      
Options Outstanding, Forfeited | shares (65,845) (65,845) (33,060) (33,060)  
Options Outstanding, Ending balance | shares 23,055 23,055 115,605 115,605  
Weighted Average Exercise Price, Beginning balance $ 123.35   $ 138.86    
Weighted Average Exercise Price, Exercised 88.62        
Weighted Average Exercise Price, Forfeitures 141.05   193.1    
Weighted Average Exercise Price, Ending balance $ 113.01   $ 123.35    
Options exercisable | shares 23,055 23,055 115,605 115,605 141,156
Canadian Share Options [Member] | Top of Range [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Range of Exercise Prices, Beginning balance $ 146.4   $ 286.2    
Range of Exercise Prices, Exercised 89.2        
Range of Exercise Prices, Forfeitures 286.2   286.2    
Range of Exercise Prices, Ending balance 145.97   146.4    
Canadian Share Options [Member] | Bottom Of Range [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Range of Exercise Prices, Beginning balance 87   87    
Range of Exercise Prices, Exercised 87        
Range of Exercise Prices, Forfeitures 89.2   89.2    
Range of Exercise Prices, Ending balance $ 87   $ 87    
U.S. Share Options [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Options Outstanding, Beginning balance | shares 267,843 267,843 283,793 283,793  
Options Outstanding, Granted | shares 0 0 0 0  
Options Outstanding, Exercised | shares (93,890) (93,890)      
Options Outstanding, Forfeited | shares (32,205) (32,205) (15,950) (15,950)  
Options Outstanding, Ending balance | shares 141,748 141,748 267,843 267,843  
Weighted Average Exercise Price, Beginning balance   $ 80.43   $ 86.23  
Weighted Average Exercise Price, Exercised   61.64      
Weighted Average Exercise Price, Forfeitures   115.8   183.6  
Weighted Average Exercise Price, Ending balance   $ 84.84   $ 80.43  
Options exercisable | shares 141,748 141,748 257,854 257,854 239,521
U.S. Share Options [Member] | Top of Range [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Range of Exercise Prices, Beginning balance   $ 115.8   $ 183.6  
Range of Exercise Prices, Exercised   68.8      
Range of Exercise Prices, Forfeitures   115.8   183.6  
Range of Exercise Prices, Ending balance   111.47   115.8  
U.S. Share Options [Member] | Bottom Of Range [Member]          
Disclosure of terms and conditions of share-based payment arrangement [Line Items]          
Range of Exercise Prices, Beginning balance   51.2   51.2  
Range of Exercise Prices, Exercised   51.2      
Range of Exercise Prices, Forfeitures   115.8   183.6  
Range of Exercise Prices, Ending balance   $ 51.2   $ 51.2