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NATURE OF OPERATIONS, CONSOLIDATION AND PRESENTATION OF FINANCIAL STATEMENTS - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
care_center
state
Jun. 30, 2020
USD ($)
Sep. 30, 2019
Sep. 30, 2020
USD ($)
care_center
state
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Number of states with facilities | state 39     39    
Minimum ownership percentage for controlling interest (percent) 50.00%     50.00%    
Maximum ownership percentage for equity method investment (percent) 50.00%     50.00%    
Equity method investment, aggregate cost $ 14,200     $ 14,200   $ 35,700
Proceeds from sale of equity method investment       17,876 $ 0  
Loss on sale of equity method investment       $ (2,980) $ 0  
Home Health [Member]            
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Number of owned and operated care centers | care_center 320     320    
Hospice [Member]            
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Number of owned and operated care centers | care_center 182     182    
Personal Care            
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Number of owned and operated care centers | care_center 14     14    
Revenue from Contract with Customer | Medicare Revenue            
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Percent of net services revenue 76.00%   74.00% 75.00% 74.00%  
Heritage Healthcare Innovation Fund, LP [Member]            
Organization, Consolidation and Presentation of Financial Statements [Line Items]            
Proceeds from sale of equity method investment   $ 17,900        
Loss on sale of equity method investment   $ (3,000)