Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Summary of Significant Accounting Policies - Percentage of Net Service Revenue Earned by Category of Payor (Detail)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Home health      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 100.00% 100.00% 100.00%
Home health | Medicare      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 66.80% 70.20% 71.80%
Home health | Managed Care, Commercial, and Other      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 33.20% 29.80% 28.20%
Hospice      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 100.00% 100.00% 100.00%
Hospice | Medicare      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 93.10% 92.00% 90.70%
Hospice | Managed Care, Commercial, and Other      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 6.90% 8.00% 9.30%
Home and Community-Based      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 100.00% 100.00% 100.00%
Home and Community-Based | Medicaid      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 21.40% 23.20% 23.90%
Home and Community-Based | Managed Care, Commercial, and Other      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 78.60% 76.80% 76.10%
Facility-Based      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 100.00% 100.00% 100.00%
Facility-Based | Medicare      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 55.00% 56.20% 59.70%
Facility-Based | Managed Care, Commercial, and Other      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 45.00% 43.80% 40.30%
Healthcare Innovations      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 100.00% 100.00% 100.00%
Healthcare Innovations | Medicare      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 19.20% 21.60% 22.80%
Healthcare Innovations | Managed Care, Commercial, and Other      
Significant Accounting Policies [Line Items]      
Percentage of net service revenue 80.80% 78.40% 77.20%