Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES - Additional Information (Detail)

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INCOME TAXES - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Income Taxes [Line Items]        
Gross unrecognized tax benefit balance, change within the next twelve months, lower limit $ 0   $ 0  
Gross unrecognized tax benefit balance, change within the next twelve months, upper limit 5.0   5.0  
Effective tax rate 59.40% 35.30% 48.40% 36.40%
Increase in effective tax rate 23.20%   11.40%  
Boa Vista Servicos S.A.
       
Income Taxes [Line Items]        
Tax expense $ 17.5