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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]    
Amount of settlement funds $ 284.0  
Goodwill measurement period 1 year  
Customer Concentration Risk
    
Summary Of Significant Accounting Policies [Line Items]    
Percentage of receivables No customer accounted for more than 10% of the Company's consolidated receivables balance as of December 31, 2013 or 2012. No customer accounted for more than 10% of the Company's consolidated receivables balance as of December 31, 2013 or 2012.
Minimum
    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 3 years  
Minimum | Software Acquired or Developed for Internal Use
    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 3 years  
Maximum
    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 20 years  
Maximum | Software Acquired or Developed for Internal Use
    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 10 years