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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2015
USD ($)
Segment
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Reporting business segments | Segment 2    
Reserve for uncollectible accounts $ 5,200,000 $ 7,000,000  
Goodwill impairment 0 0  
Impairment of trade name     $ 2,904,000
State tax net operating losses, valuation allowance 100,000    
Current deferred tax assets $ 8,412,000 $ 4,816,000  
Leasehold Improvements [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated life, description The shorter of useful life or lease term.    
Minimum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Ownership percentage 50.00%    
Maximum [Member] | Customer Concentration Risk [Member] | Revenue [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Minimum percentage of revenue accounted for by one customer 10.00% 10.00% 10.00%
Maximum [Member] | Building And Improvement [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated life 40 years    
Maximum [Member] | Computer Equipment and Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated life 10 years    
Maximum [Member] | Furniture and Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated life 10 years    
Maximum [Member] | Transportation Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated life 15 years    
Maximum [Member] | Software Development [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Intangible assets estimated useful life 10 years