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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Accounting Policies [Line Items]    
Number of reportable segments 4  
Reserve for policy cancellations $ 8,010,000 $ 7,174,000
Non-compete agreements [Member]
    
Accounting Policies [Line Items]    
Estimated lives of amortizable intangible assets 7 years 7 years 2 months 12 days
Minimum [Member]
    
Accounting Policies [Line Items]    
Estimated useful lives of the related assets 3 years  
Minimum [Member] | Non-compete agreements [Member]
    
Accounting Policies [Line Items]    
Estimated lives of amortizable intangible assets 5 years  
Maximum [Member]
    
Accounting Policies [Line Items]    
Estimated useful lives of the related assets 15 years  
Maximum [Member] | Non-compete agreements [Member]
    
Accounting Policies [Line Items]    
Estimated lives of amortizable intangible assets 15 years