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Public Offering (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 01, 2019
Sep. 09, 2019
Aug. 22, 2018
Aug. 20, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Class Of Stock [Line Items]              
Common stock, par value         $ 0.001 $ 0.001  
Proceeds from issuance of common stock, net of issuance costs           $ 172,945 $ 76,618
Business acquisition purchase price         $ 207,660 184,076 62,440
Increase to additional paid in capital from public offering           $ 172,945 76,618
Issuance costs             $ 5,400
Term Loan [Member] | Credit Facility [Member]              
Class Of Stock [Line Items]              
Repayment of credit facility     $ 102,600        
Hospice Partners of America, LLC [Member]              
Class Of Stock [Line Items]              
Business acquisition purchase price $ 130,000            
Common Stock [Member]              
Class Of Stock [Line Items]              
Shares issued during period   2,300,000   2,100,000   2,300,000 1,390,000
Common stock, par value   $ 0.001   $ 0.001      
Public offering price, per share   $ 79.50          
Proceeds from issuance of common stock, net of issuance costs   $ 172,900          
Underwriting discounts and estimated offering expenses   $ 9,900          
Increase to additional paid in capital from public offering           $ 2 $ 1
Purchase price per share       $ 59.00      
Additional Paid-in Capital [Member]              
Class Of Stock [Line Items]              
Increase to additional paid in capital from public offering           $ 172,943 $ 76,617
Over-Allotment Option [Member] | Common Stock [Member]              
Class Of Stock [Line Items]              
Shares issued during period   300,000 315,000        
Proceeds from issuance of common stock, net of issuance costs     $ 17,500        
Primary Shares [Member] | Common Stock [Member]              
Class Of Stock [Line Items]              
Shares issued during period       1,075,267      
Proceeds from issuance of common stock, net of issuance costs       $ 59,100      
Secondary Shares [Member] | Common Stock [Member]              
Class Of Stock [Line Items]              
Shares issued during period       1,024,733