Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Percentage of Net Service Revenue Earned by Category of Payor (Details)

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Significant Accounting Policies - Percentage of Net Service Revenue Earned by Category of Payor (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Home health services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 100.00% 100.00% 100.00% 100.00%
Hospice services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 100.00% 100.00% 100.00% 100.00%
Home and community-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 100.00% 100.00% 100.00% 100.00%
Facility-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 100.00% 100.00% 100.00% 100.00%
HCI        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 100.00% 100.00% 100.00% 100.00%
Medicare | Home health services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 66.40% 69.70% 67.00% 70.60%
Medicare | Hospice services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 93.80% 89.80% 92.90% 91.60%
Medicare | Facility-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 54.20% 59.30% 55.20% 56.60%
Medicare | HCI        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 11.10% 17.10% 17.90% 20.70%
Managed Care, Commercial, and Other | Home health services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 33.60% 30.30% 33.00% 29.40%
Managed Care, Commercial, and Other | Hospice services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 6.20% 10.20% 7.10% 8.40%
Managed Care, Commercial, and Other | Home and community-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 78.50% 78.20% 79.00% 76.30%
Managed Care, Commercial, and Other | Facility-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 45.80% 40.70% 44.80% 43.40%
Managed Care, Commercial, and Other | HCI        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 88.90% 82.90% 82.10% 79.30%
Medicaid | Home and community-based services        
Disaggregation of Revenue [Line Items]        
Percentage of net service revenue 21.50% 21.80% 21.00% 23.70%