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BASIS OF PREPARATION OF THESE CONSOLIDATED FINANCIAL STATEMENTS - Summary of Lease Liabilities Recognised (Details)
$ in Thousands
Jan. 01, 2019
USD ($)
Disclosure of expected impact of initial application of new standards or interpretations [line items]  
Lease liabilities $ 46,887
Discounted using the lessee's incremental borrowing rate of at the date of initial application 46,887
Lease liabilities 46,887
Restated Balance  
Disclosure of expected impact of initial application of new standards or interpretations [line items]  
Lease liabilities $ 55,222