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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 |  |  |

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