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Employees And Payroll Accruals - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accounts Payable and Accrued Liabilities [Line Items]    
Employee and payroll accruals related to payroll accrued for the benefit of certain related parties, years 2002 to 2007 $ 4,351 $ 4,512