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SUBSEQUENT EVENTS (Details) - USD ($)
$ in Thousands
3 Months Ended
May 07, 2021
Jun. 30, 2021
Mar. 31, 2021
Mar. 31, 2020
Subsequent Event [Line Items]        
Interest on senior debt     $ 2,266 $ 1,179
Subsequent Event | 2016 senior notes | Senior Notes        
Subsequent Event [Line Items]        
Repayments of senior debt $ 100,000      
Interest rate, stated percentage 4.50%      
Percentage of principal amount redeemed 100.00%      
Subsequent Event | 2016 senior notes | Senior Notes | Forecast        
Subsequent Event [Line Items]        
Interest on senior debt   $ 1,100    
Subsequent Event | 2016 senior notes | Senior Notes | LIBOR        
Subsequent Event [Line Items]        
Basis spread on variable rate 3.30%