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DEBT (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
installment
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Sep. 19, 2019
USD ($)
Debt Instrument [Line Items]        
Effective interest rate 4.50%   4.80%  
Carrying Value $ 223,653   $ 201,816  
Letters of credit outstanding 0   $ 0  
Interest expense, debt $ 2,269 $ 1,209    
Other Debt [Member]        
Debt Instrument [Line Items]        
Effective interest rate 4.50%   4.80%  
Carrying Value $ 223,653   $ 198,316  
SAWHF        
Debt Instrument [Line Items]        
Ownership interest (as a percent) 11.85%      
Morrison Grove Management LLC [Member] | Other Debt [Member]        
Debt Instrument [Line Items]        
Notes Payable $ 3,500      
Notes Payable and Other Debt [Member] | SAWHF        
Debt Instrument [Line Items]        
Weighted average effective interest rates of debt obligations 14.70%      
Carrying Value $ 4,200      
Ownership interest (as a percent) 11.85%      
Principal amount of debt $ 4,300      
Bond Related Notes Payable and Other Debt [Member] | Morrison Grove Management LLC [Member]        
Debt Instrument [Line Items]        
Interest rate (as a percent) 5.00%      
Principal amount of debt $ 4,500      
Notes Payable 4,500      
Bond Related Notes Payable and Other Debt [Member] | Morrison Grove Management LLC [Member] | Debt Obligations Mature In 2026        
Debt Instrument [Line Items]        
Notes Payable 3,000      
Bond Related Notes Payable and Other Debt [Member] | Morrison Grove Management LLC [Member] | Debt Obligations Mature In 2027        
Debt Instrument [Line Items]        
Notes Payable $ 1,500      
Number of installments for amortization of debt | installment 3      
Johannesburg Interbank Agreed Rate (JIBAR) [Member] | Notes Payable and Other Debt [Member] | SAWHF        
Debt Instrument [Line Items]        
Fixed spread (as a percent) 5.15%      
Base rate (as percentage) 6.48%      
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Effective interest rate 5.30%      
Carrying Value $ 120,000      
Fixed spread (as a percent) 2.75%      
Principal amount of debt $ 120,000      
Borrowing capacity $ 175,000      
Debt instrument, maturity date Sep. 19, 2022      
Line of credit facility extension period 12 months      
Interest expense, debt $ 1,300      
Debt instrument base rate plus fixed spread percentage rate 4.30%      
Revolving Credit Facility [Member] | Committed Amount [Member]        
Debt Instrument [Line Items]        
Borrowing capacity $ 120,000     $ 100,000
Minimum [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument [Line Items]        
Interest rate (as a percent)       1.50%
Subsidiaries [Member] | Revolving Credit Facility [Member] | Facility Amount [Member]        
Debt Instrument [Line Items]        
Borrowing capacity       $ 125,000