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Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	118 Months Ended	1 Months Ended
	Apr. 03, 2013 Position	Jun. 30, 2013	Jun. 30, 2013 Severance and Health Benefit Continuation Costs	Apr. 03, 2013 Filled positions Position	Apr. 03, 2013 Unfilled positions Position
Restructuring Cost and Reserve [Line Items]
Total charges incurred related to workforce reduction		$ 1.6
Number of positions eliminated	65			40	25
Restructuring charges relating to severance and other			$ 1.3

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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- Definition

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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