v2.4.0.8
Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]  
Cash and cash equivalents maximum maturity term, months 3 months
Finite-lived intangible assets, useful life, years 7 years 4 months 24 days
Non-controlling interest, expiration period, minimum, years 1 year
Non-controlling interest, expiration period, maximum, years 3 years
Minimum
  
Summary Of Significant Accounting Policies [Line Items]  
Finite-lived intangible assets, useful life, years 3 years
Minimum | Leasehold Improvements
  
Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment, useful life, years 10 years
Minimum | Other Long Lived Assets
  
Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment, useful life, years 3 years
Maximum
  
Summary Of Significant Accounting Policies [Line Items]  
Finite-lived intangible assets, useful life, years 20 years
Maximum | Leasehold Improvements
  
Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment, useful life, years 15 years
Maximum | Other Long Lived Assets
  
Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment, useful life, years 7 years