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Concentration Of Risk (Narrative) (Details) - VITAS [Member]
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
item
Mar. 31, 2018
USD ($)
Concentration Risk [Line Items]    
Number of service providers | item 1  
VITAS made purchases from provider | $ $ 7.3 $ 8.2
Puchases From Vendor [Member]    
Concentration Risk [Line Items]    
Percentage of concentration risk services represent from vendor 85.00% 85.00%