v2.4.0.6
Summary of Tax Losses Carried Forward (Detail)
 12 Months Ended
Dec. 31, 2012
Hungary
  
Operating Loss Carryforwards [Line Items]  
Maximum number of years tax losses can be carried forward Unrestricted period [1]
Maximum | United States
  
Operating Loss Carryforwards [Line Items]  
Maximum number of years tax losses can be carried forward 20 years
Maximum | Russia
  
Operating Loss Carryforwards [Line Items]  
Maximum number of years tax losses can be carried forward 10 years
Maximum | Poland
  
Operating Loss Carryforwards [Line Items]  
Maximum number of years tax losses can be carried forward 5 years
[1] In some circumstances the Tax Office's permission to carry the loss forward is required.