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Restructuring - Summary of Changes in Restructuring Liability (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Restructuring And Related Activities [Abstract]
Restructuring liability, Beginning balance	$ 5,400
Additional expense	428	25,500
Cash payments made	(4,429)
Restructuring liability, Ending balance	$ 1,399	$ 1,399

- 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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