Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2018
USD ($)
Unit
Segment
Dec. 31, 2017
USD ($)
Unit
Segment
Dec. 31, 2016
USD ($)
Unit
Segment
Summary Of Significant Accounting Policies [Line Items]      
Approximate available remaining lease period for fee owned properties 20 years    
Impairment of goodwill $ 0 $ 0 $ 0
Requirements to be classified as capital lease, minimum amount of present value of future minimum lease payments against estimated fair value, percentage 90.00%    
Requirements to be classified as capital lease, minimum length of lease term against estimated useful life, percentage 75.00%    
General liability claim per occurrence, cap $ 250,000 250,000 100,000
Aggregate annual cap per policy year 4,750,000 3,900,000 3,350,000
Pre-funding claims and covers claims annual cap 5,000,000 5,000,000  
Medical claim per occurrence, cap 250,000 250,000 $ 150,000
Insurance Reserves $ 10,827,000 $ 8,252,000  
Minimum Percentage for Tax position measure as largest amount of benefit 50.00%    
Reportable operating segments | Segment 2 2 2
U.S. Operating Segment      
Summary Of Significant Accounting Policies [Line Items]      
Number of reporting units | Segment 20    
Multiplication Value to Cash flows for the determination of fair value of Reporting units | Unit 8 8 8
International Operating Segment      
Summary Of Significant Accounting Policies [Line Items]      
Number of reporting units | Segment 7    
Trade Names      
Summary Of Significant Accounting Policies [Line Items]      
Impairment of intangible assets $ 0 $ 0 $ 0
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Equity method investment, ownership percentage 20.00%    
Amortization period of deferred charges and other assets 1 year    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Equity method investment, ownership percentage 50.00%    
Cost method investment, ownership Percentage 20.00%    
Amortization period of deferred charges and other assets 17 years    
Pre-funding claims and covers claims per occurrence   $ 250,000