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Concentration Of Risk (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($)
Concentration Risk [Line Items] |  |
Accounts payable | $ | $ 37,838 | $ 51,101
VITAS [Member] |  |
Concentration Risk [Line Items] |  |
Number of service providers | item | 1 |
Medicare [Member] | Accounts Receivable [Member] | VITAS [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 70.00% | 71.00%
Medicaid [Member] | Accounts Receivable [Member] | VITAS [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 25.00% | 24.00%
Medicare And Medicaid [Member] | Accounts Receivable [Member] | VITAS [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 75.00% |

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