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LONG-TERM DEBT - 2020 Notes (Details) - USD ($)
$ in Thousands
Apr. 07, 2020
Mar. 05, 2020
2020 Notes    
Disclosure of detailed information about borrowings [line items]    
Principal   $ 200,000
Series A    
Disclosure of detailed information about borrowings [line items]    
Principal   $ 100,000
Interest rate   2.78%
Series B    
Disclosure of detailed information about borrowings [line items]    
Principal   $ 100,000
Interest rate   2.88%
Weighted average | 2020 Notes    
Disclosure of detailed information about borrowings [line items]    
Maturity period 11 years  
Interest rate 2.83%