v2.4.0.6
Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Contingency [Line Items]      
Permanent differences $ 86,906,000 $ 220,304,000 $ (9,247,000)
Impairment charges recognized during the period 327,847,000 930,127,000  
Income tax paid 5,700,000 5,100,000 29,500,000
Net operating loss carry-forward 296,987,000    
Additional non cash valuation allowance for deferred tax assets 13,500,000 61,300,000  
Russia
     
Income Tax Contingency [Line Items]      
Underlying tax rate 20.00%    
Poland
     
Income Tax Contingency [Line Items]      
Underlying tax rate 19.00%    
Internal Revenue Service (IRS)
     
Income Tax Contingency [Line Items]      
Net operating loss carry-forward $ 19,400,000