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Restructuring Costs - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 24,887	$ 6,171	$ 34,639	$ 21,829
Global workforce elimination percentage under restructuring plan			4.00%

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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