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LONG-TERM DEBT - Senior Unsecured Debt (Details) - Senior Unsecured Debt
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]  
Stated interest rate 7.25%
Debt, face amount $ 400,000,000.0
On or After November 1, 2019  
Debt Instrument [Line Items]  
Redemption of the principal amount 105.438%
On or after November 1, 2020  
Debt Instrument [Line Items]  
Redemption of the principal amount 103.625%
On or after November 1, 2021  
Debt Instrument [Line Items]  
Redemption of the principal amount 101.813%
On or after November 1, 2022  
Debt Instrument [Line Items]  
Redemption of the principal amount 100.00%