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Capital Stock - Summary of Stock Option Activity and Related Information (Detail) - $ / shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Options      
Options Outstanding - beginning of year (shares) 5,393,000 6,208,000 5,449,000
Options, Granted (in shares) 0 507,000 1,490,000
Options, Exercised (shares) (792,000) (1,210,000) (205,000)
Options, Forfeited / expired (shares) (221,000) (112,000) (526,000)
Options Outstanding - end of year (shares) 4,380,000 5,393,000 6,208,000
Options Exercisable - end of year (shares) 3,813,000 4,392,000 4,952,000
Weighted-Average Exercise Price      
Weighted-Average Exercise Price, Outstanding - beginning of year (dollars per share) $ 7.27 $ 6.99 $ 9.90
Weighted-Average Exercise Price, Granted (dollars per share) 0 5.81 2.88
Weighted-Average Exercise Price, Exercised (dollars per share) 3.43 3.89 3.98
Weighted-Average Exercise Price, Forfeited / expired (dollars per share) 12.86 21.70 26.59
Weighted-Average Exercise Price, Outstanding - end of year (dollars per share) 7.66 7.27 6.99
Weighted-Average Exercise Price, Exercisable - end of year (dollars per share) $ 8.16 $ 8.01 $ 8.03
Stock Options      
Options      
Options, Granted (in shares) 0 506,579