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Details of Certain Balance Sheet Accounts (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended
Nov. 30, 2020
Apr. 30, 2020
Mar. 31, 2021
Dec. 31, 2020
Details Of Certain Balance Sheet Accounts [Line Items]        
Payroll tax deferral     $ 7,141,000 $ 7,141,000
Queen City Hospice [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
CMS advanced payment program — Queen City Hospice       $ 10,801,000
CARES Act [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
Payroll tax deferral   $ 7,100,000    
Repayment of deferred payroll taxes in 2021   7,100,000    
CARES Act [Member] | Provider Relief Fund [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
CARES Act and other relief legislation     178,000,000,000  
Aggregate principal amount of grants received $ 13,700,000      
Fund distributed to health care related expenses     900,000  
CARES Act [Member] | Provider Relief Fund [Member] | Queen City Hospice [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
Intends to pay retention payments     $ 1,900,000  
CARES Act [Member] | Provider Relief Fund [Member] | Minimum [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
Annual awards for commercial organizations   750,000    
CARES Act [Member] | Medicare Accelerated And Advance Payment Program [Member] | Queen City Hospice [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
CMS advanced payment program — Queen City Hospice   10,800,000    
Repayment of grants   $ 0    
Repayment of funds period   2021-03    
CARES Act [Member] | Medicare Accelerated And Advance Payment Program [Member] | Hospice and Home Health [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
Medicare payment period   3 months    
CARES Act [Member] | Medicare Accelerated And Advance Payment Program [Member] | Maximum [Member] | Hospice and Home Health [Member]        
Details Of Certain Balance Sheet Accounts [Line Items]        
Request percentage of advance or accelerated payment   100.00%