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DEBT (Schedule of Outstanding Exchangeable) (Details) - Exchangeable Notes
1 Months Ended
Jan. 31, 2017
USD ($)
$ / shares
Debt Instrument [Line Items]  
Principal amount | $ $ 287,500,000
Cash coupon rate (per annum) 1.25%
Conversion rate effective September 15, 2023 (per $1000 principal amount) 0.012026
Effective conversion price effective September 15, 2023 (per ADS) (in usd per share) | $ / shares $ 83.15