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Divestiture-Related Activities - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	Aug. 26, 2012	Mar. 31, 2013	Apr. 01, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Retained liability expenses on divested business		$ 800,000	$ 900,000
Proceeds from sale of business	45,200,000
Gain from sale of business	$ 39,000

The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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