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Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Person
Jun. 30, 2012
Person
Restructuring Cost and Reserve [Line Items]    
Employee termination costs $ 3,400,000 $ 9,600,000
Employee termination cost paid during the period 5,100,000 5,973,000
Number of positions eliminated 90 269
Americas
    
Restructuring Cost and Reserve [Line Items]    
Employee termination costs 1,700,000 4,300,000
EMEA
    
Restructuring Cost and Reserve [Line Items]    
Employee termination costs 1,600,000 4,500,000
Asia /Pacific
    
Restructuring Cost and Reserve [Line Items]    
Employee termination costs $ 100,000 $ 800,000