Amount of tax expense or benefit on gain (loss), not previously recognized, resulting from the sale of a business component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Schedule of Condensed Consolidated Statements of Operations (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Change In Accounting Principle
Gain on disposal of discontinued operations, tax	$ 0	$ 0	$ 0	$ 4,578
Originally Reported
Change In Accounting Principle
Gain on disposal of discontinued operations, tax				4,578
As Adjusted
Change In Accounting Principle
Gain on disposal of discontinued operations, tax				$ 4,578