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DEBT - Additional Information (Details) - USD ($)
12 Months Ended
Feb. 11, 2020
Apr. 02, 2018
Sep. 19, 2014
Dec. 31, 2019
Line of Credit Facility [Line Items]        
Proceeds from issuance of debt   $ 980,000,000.0    
Line of Credit | London Interbank Offered Rate (LIBOR)        
Line of Credit Facility [Line Items]        
Basis spread on variable rate       3.50%
Line of Credit | Fed Funds Effective Rate Overnight Index Swap Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate       0.50%
Line of Credit | Adjusted LIBOR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate       1.00%
Unsecured Debt | Goldman Sachs Bank USA        
Line of Credit Facility [Line Items]        
Face amount     $ 400,000,000.0  
Unsecured Debt | Goldman Sachs Bank USA | Unsecured Debt        
Line of Credit Facility [Line Items]        
Debt Instrument, Term     5 years  
Face amount     $ 300,000,000.0  
Unsecured Debt | Goldman Sachs Bank USA | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Face amount     $ 100,000,000.0  
Secured Debt | Revolving Credit Facility | Subsequent Event        
Line of Credit Facility [Line Items]        
Interest rate, decrease 50.00%      
Stated interest rate 3.00%      
Interest rate reduction upon achievement of certain criteria 25.00%      
Secured Debt | Morgan Stanley Senior Funding, Inc.        
Line of Credit Facility [Line Items]        
Face amount   980,000,000.0    
Maximum borrowing capacity       $ 100,000,000.0
Secured Debt | Morgan Stanley Senior Funding, Inc. | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Face amount   $ 100,000,000.0   $ 99,000,000.0
Secured Debt | Morgan Stanley Senior Funding, Inc. | Revolving Credit Facility | Minimum        
Line of Credit Facility [Line Items]        
Commitment fee percentage       0.25%
Secured Debt | Morgan Stanley Senior Funding, Inc. | Revolving Credit Facility | Maximum        
Line of Credit Facility [Line Items]        
Commitment fee percentage       0.375%
Secured Debt | Morgan Stanley Senior Funding, Inc. | Line of Credit        
Line of Credit Facility [Line Items]        
Face amount       $ 1,000,000.0