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Capital stock - Movement of Ordinary Shares Issued (Detail) - Ordinary shares [member] - shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of classes of share capital [line items]      
Beginning balance 727,240 727,240 727,265
Restricted shares – cancelled (25)
Ending balance 727,240 727,240 727,240