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Subsequent Events - Additional information (Detail) (Subsequent Event, USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 03, 2014 Position
Subsequent Event
Subsequent Event [Line Items]
Number of workforce reduced	75
Charges associated with reduction in workforce	$ 2,357
Expected restructuring charges	$ 40,000

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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