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RELATED PARTIES - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 01, 2022
Apr. 13, 2021
Mar. 31, 2021
Dec. 31, 2021
Jan. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]            
Debt amount issued by third party entity         $ 70.0  
Agreement Expiration Date     Dec. 31, 2021      
Agreement termination description     The initial term of the Agreement is through December 31, 2021 and it automatically renews for an unlimited number of one-year terms thereafter, provided that either party may terminate the Agreement on 90 days’ prior written notice.      
Scenario, Forecast            
Related Party Transaction [Line Items]            
Percentage of value of the investment assets equal to quarterly fee 0.025%     0.0125%    
Stone Mor Inc            
Related Party Transaction [Line Items]            
Participation amount in debt issuance         30.0  
Axar            
Related Party Transaction [Line Items]            
Participation amount in debt issuance         $ 20.0  
Payless Holdings LLC | Stone Mor Inc            
Related Party Transaction [Line Items]            
Percentage of fair value trust owned           4.00%
Axar            
Related Party Transaction [Line Items]            
Ownership interest of Partnership's outstanding common units     75.10%      
Mr. Axelrod, Chairman | Payless Holdings LLC | Axar            
Related Party Transaction [Line Items]            
Equity owned percentage           30.00%
Robert B. Hellman, Jr., Former Member of Board of Directors | Subsequent Event            
Related Party Transaction [Line Items]            
Reimbursement of related party expenses   $ 0.6