Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Components of Property, Building and Equipment (Detail)

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Summary of Significant Accounting Policies - Components of Property, Building and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Other Long Term Assets [Line Items]    
Property, building and equipment, gross $ 167,349 $ 134,816
Less accumulated depreciation 69,441 55,253
Property, building and equipment, net 97,908 79,563
Land    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross 7,339 6,750
Building and leasehold improvements    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross 36,142 35,474
Transportation equipment    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross 12,470 13,503
Fixed equipment    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross 376 745
Office furniture and medical equipment    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross 94,993 78,344
Construction in progress    
Other Long Term Assets [Line Items]    
Property, building and equipment, gross $ 16,029 $ 0