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Financial Instrument - Risk Management and Fair Value - Summary of Financial Liabilities According to Maturity Date (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount $ 1,460,841 $ 1,498,747
Up to one year [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 312,577 387,408
Between 1 and 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 981,675 768,665
More than 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 305,876 504,009
Loans and Borrowings [Member    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 1,163,900 1,060,765
Loans and Borrowings [Member | Up to one year [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 155,902 146,434
Loans and Borrowings [Member | Between 1 and 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 834,145 556,257
Loans and Borrowings [Member | More than 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 297,156 494,944
Lease liability [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 230,510 304,564
Lease liability [member] | Up to one year [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 90,244 107,556
Lease liability [member] | Between 1 and 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 147,530 212,408
Lease liability [member] | More than 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 8,720 9,065
Accounts payable [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 63,461 119,332
Accounts payable [member] | Up to one year [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 63,461 119,332
Accounts payable [member] | Between 1 and 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 0 0
Accounts payable [member] | More than 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 0 0
Account payable to related parties [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 2,970 14,086
Account payable to related parties [member] | Up to one year [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 2,970 14,086
Account payable to related parties [member] | Between 1 and 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 0 0
Account payable to related parties [member] | More than 4 years [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 0 0
Contractual cash flow [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 1,600,129 1,660,082
Contractual cash flow [member] | Loans and Borrowings [Member    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 1,287,203 1,197,635
Contractual cash flow [member] | Lease liability [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 246,495 329,029
Contractual cash flow [member] | Accounts payable [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount 63,461 119,332
Contractual cash flow [member] | Account payable to related parties [member]    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Non - derivative financial liabilities carrying amount $ 2,970 $ 14,086