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LONG-TERM DEBT - Scheduled Principal Balances (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Debt Instrument [Line Items]  
Scheduled Principal Payments $ 27,618
Debt Instrument, Redemption, Period One [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments 5
Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments 22
Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments 175
Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments 24
Debt Instrument, Redemption, Period Five [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments 25
Debt Instrument, Redemption, Thereafter [Member]  
Debt Instrument [Line Items]  
Scheduled Principal Payments $ 27,367