Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2012 Person
Restructuring Cost and Reserve [Line Items]
Employee termination costs	$ 6,200,000
Employee termination cost paid during the period	894,000
Number of positions eliminated	179
Americas
Restructuring Cost and Reserve [Line Items]
Employee termination costs	2,600,000
EMEA
Restructuring Cost and Reserve [Line Items]
Employee termination costs	2,900,000
Asia /Pacific
Restructuring Cost and Reserve [Line Items]
Employee termination costs	$ 700,000