Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.3.a.u2
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
USD ($)
Group
visit
PeriodicRate
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
Jan. 01, 2019
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Selected number of Medicare home health groups | Group 1      
Number of Medicare home health resource groups | Group 153      
Number of days from date RAP paid to submit final medicare bill 60 days      
Medicare sequestration reduction for episodes 2.00%      
Low utilization adjustment visits | visit 5      
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 60.00%      
Number of days from start of episode to submit final Medicare bill 120 days      
Reimbursement for subsequent episodes of care 50.00%      
Workers' compensation, maximum coverage per incident $ 1,000,000.0      
Stop-loss insurance purchased 300,000      
Goodwill impairment loss 0 $ 0 $ 0  
Disposal related to goodwill associated with closure of underperforming locations 600,000 600,000 1,500,000  
Amortization expense 1,300,000 2,100,000 2,100,000  
Disposal related to intangible assets 7,100,000 3,700,000 0  
Loss on impairment of intangible assets 0 0    
Impairment of long-lived assets 0 0 0  
Depreciation expense 17,000,000.0 $ 14,100,000 $ 11,300,000  
Interest costs capitalized $ 200,000      
Common stock, shares authorized (in shares) | shares 60,000,000 60,000,000    
Increase in total assets $ 95,452,000 $ 0    
Increase in total liabilities $ 98,257,000      
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Intangible asset estimated useful life 2 years      
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Intangible asset estimated useful life 19 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 10 years      
ASU 2016-02        
Summary Of Significant Accounting Policies [Line Items]        
Increase in total liabilities       $ 84,600,000
Effect of new accounting principle in period of adoption       $ 89,700,000
Accountable Care Organizations | HCI        
Summary Of Significant Accounting Policies [Line Items]        
Net service revenue related to the 2017 ACO service periods $ 2,900,000 $ 3,700,000    
General liability        
Summary Of Significant Accounting Policies [Line Items]        
Maximum coverage per incident 100,000      
D&O coverage | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Deductibles 500,000      
D&O coverage | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Deductibles 1,000,000.0      
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