Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.20.4
Summary of Significant Accounting Policies - Additional Information (Detail)
4 Months Ended 12 Months Ended
Apr. 30, 2020
Dec. 31, 2020
USD ($)
PeriodicRate
Group
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Number of Medicare home health resource groups | Group   432    
Medicare sequestration reduction for episodes 2.00%      
Selected hospice, periodic rates used to calculate revenue | PeriodicRate   1    
Number of hospice, periodic rates used to calculate revenue | PeriodicRate   4    
Minimum percentage of Medicare reimbursement from inpatient care services that subjects individual programs to inpatient cap   20.00%    
Determination period for hospice Medicare inpatient reimbursement cap   12 months    
Reimbursement for initial episode of care   20.00%    
Number of days from start of episode to submit final Medicare bill   120 days    
Number of days from date RAP paid to submit final medicare bill   30 days    
Workers' compensation, maximum coverage per incident   $ 1,000,000.0    
Maximum coverage per incident   300,000    
Goodwill impairment loss   0 $ 0 $ 0
Disposal related to goodwill associated with closure of underperforming locations   500,000 600,000 600,000
Loss on impairment of intangible assets   0 0 0
Impairment of long-lived assets   700,000 7,100,000 3,700,000
Disposal related to intangible assets   700,000 7,100,000 3,700,000
Amortization expense   1,200,000 1,300,000 2,100,000
Depreciation expense   20,000,000.0 17,000,000.0 14,100,000
Interest costs capitalized   1,100,000    
General liability        
Summary Of Significant Accounting Policies [Line Items]        
Deductibles   200,000    
D&O coverage        
Summary Of Significant Accounting Policies [Line Items]        
Deductibles   $ 2,000,000.0    
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Intangible asset estimated useful life   2 years    
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Number of days from date RAP paid to submit final medicare bill   60 days    
Intangible asset estimated useful life   17 years    
Buildings        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   39 years    
Transportation Equipment, Furniture and Other Equipment | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   3 years    
Transportation Equipment, Furniture and Other Equipment | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   15 years    
Acquired Assets        
Summary Of Significant Accounting Policies [Line Items]        
Impairment of long-lived assets   $ 0 0 $ 0
Accountable Care Organizations | HCI        
Summary Of Significant Accounting Policies [Line Items]        
Net service revenue related to the 2017 ACO service periods   $ 9,600,000 2,900,000  
Changes in Moratorium Regulations        
Summary Of Significant Accounting Policies [Line Items]        
Disposal related to intangible assets     6,100,000  
Underperforming Locations        
Summary Of Significant Accounting Policies [Line Items]        
Disposal related to intangible assets     $ 1,000,000.0