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LONG-TERM DEBT (Details)
shares in Millions
3 Months Ended 9 Months Ended
Jul. 17, 2019
USD ($)
Apr. 03, 2018
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
shares
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
shares
Jul. 01, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jul. 01, 2019
USD ($)
Debt Instrument [Line Items]                  
Less: Debt issuance costs, net     $ (2,571,000)   $ (2,571,000)     $ (3,119,000)  
Less: Unamortized discount, net     (2,325,000)   (2,325,000)     (2,825,000)  
Long-term debt     288,930,000   288,930,000     287,882,000  
Debt issuance costs, net     2,571,000   2,571,000     3,119,000  
Accumulated amortization     2,000,000.0   2,000,000.0     1,400,000  
RESI                  
Debt Instrument [Line Items]                  
Number of investment shares disposed (in shares) | shares       0.1   0.7      
Proceeds from investment shares sold     0 $ 1,300,000 0 $ 7,800,000      
Discontinued Operations, Disposed of by Sale | Financial Services Business                  
Debt Instrument [Line Items]                  
Up-front payment included in consideration, subject to working capital adjustment upon closing of the sale             $ 3,300,000   $ 40,000,000.0
Senior secured term loan                  
Debt Instrument [Line Items]                  
Outstanding balance of debt     $ 293,826,000   $ 293,826,000     $ 293,826,000  
Senior secured term loan | RESI                  
Debt Instrument [Line Items]                  
Repayment of debt       $ 2,000,000.0   $ 7,800,000      
Senior secured term loan | Discontinued Operations, Disposed of by Sale | Financial Services Business                  
Debt Instrument [Line Items]                  
Repayment of debt $ 37,000,000.0                
Term B loans | Maximum                  
Debt Instrument [Line Items]                  
Amount of principal or interest if failed to pay considered as event of default   $ 40,000,000.0              
Amount of debt which results in acceleration of debt if failed to pay considered as event of default   40,000,000.0              
Amount of unbonded, undischarged or unstayed debt under entry by court of one or more judgments for certain period to determine as event of default   $ 40,000,000.0              
April 3, 2018 Credit Agreement                  
Debt Instrument [Line Items]                  
Threshold for past due debt repayment   5 days              
April 3, 2018 Credit Agreement | Term B loans                  
Debt Instrument [Line Items]                  
Debt instrument, face amount   $ 412,000,000.0              
First repayment of debt due   1,300,000              
Aggregate amount of each consecutive quarterly scheduled principal installment   $ 3,100,000              
Leverage ratio to avoid mandatory prepayments under the Credit Agreement   3.00              
Leverage ratio at which mandatory prepayments increase under the Credit Agreement (exceeds)   3.50              
Interest rate at the end of the period     5.00%   5.00%        
April 3, 2018 Credit Agreement | Term B loans | Adjusted Eurodollar Rate                  
Debt Instrument [Line Items]                  
Debt instrument fixed base rate   1.00%              
Interest rate margin   4.00%              
April 3, 2018 Credit Agreement | Term B loans | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument fixed base rate   2.00%              
Interest rate margin   3.00%              
April 3, 2018 Credit Agreement | Line of Credit | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Outstanding balance of debt     $ 0   $ 0        
Debt instrument, face amount   $ 15,000,000.0              
Leverage ratio at which mandatory prepayments increase under the Credit Agreement (exceeds)   3.50              
Potential increase in additional borrowings   $ 125,000,000.0              
Potential increase in additional borrowings, sublimit   $ 80,000,000.0              
Unused commitment fee   0.50%              
April 3, 2018 Credit Agreement | Line of Credit | Revolving Credit Facility | Adjusted Eurodollar Rate                  
Debt Instrument [Line Items]                  
Interest rate margin   4.00%              
April 3, 2018 Credit Agreement | Line of Credit | Revolving Credit Facility | Base Rate                  
Debt Instrument [Line Items]                  
Interest rate margin   3.00%