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Related Party Transactions - Summary of Outstanding Balances with Related Parties (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Jun. 30, 2019
Joint operations [member] | Loans [member]    
Disclosure of transactions between related parties [line items]    
Amounts owing to related parties $ 33,812 $ 40,513
Amounts owing from related parties 13,625 15,474
Associates [member] | Trade payables [member]    
Disclosure of transactions between related parties [line items]    
Amounts owing to related parties 69,490 169,773
Associates [member] | Loans [member]    
Disclosure of transactions between related parties [line items]    
Amounts owing to related parties 5,097 10,097
Amounts owing from related parties 40,759 33,486
Associates [member] | Trade receivables [member]    
Disclosure of transactions between related parties [line items]    
Amounts owing from related parties $ 473 $ 3,828