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SUBSEQUENT EVENTS (Details) - Amended and Restated Credit Agreement
Feb. 06, 2020
USD ($)
borrowing
Nov. 08, 2018
USD ($)
Nov. 01, 2018
USD ($)
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, maximum borrowing capacity     $ 50,000,000
Borrowings      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, maximum borrowing capacity $ 100,000,000    
Number of borrowings | borrowing 4    
Line of credit facility, additional borrowing capacity $ 100,000,000    
Revolving Credit Facility      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, maximum borrowing capacity     $ 150,000,000
Line of credit facility, additional borrowing capacity   $ 100,000,000  
Revolving Credit Facility | Borrowings      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, maximum borrowing capacity $ 250,000,000    
LIBOR | Revolving Credit Facility      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis   1.75%  
Maximum | LIBOR | Revolving Credit Facility | Borrowings      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 1.75%    
Minimum | LIBOR | Revolving Credit Facility | Borrowings      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 1.50%