Goodwill and Other Intangible Assets - Changes in Net Carrying Value of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified				3 Months Ended	9 Months Ended	12 Months Ended
Sep. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 29, 2012 Laserband LLC [Member]	Sep. 28, 2013 Laserband LLC [Member]	Dec. 31, 2012 Laserband LLC [Member]
Goodwill [Line Items]
Beginning Balance	$ 94,942	$ 94,942	$ 79,703
Acquisition - LaserBand				24,353	0	24,353
Impairment charges	0	(9,114)	(101,028)
Ending Balance	$ 94,942	$ 94,942	$ 79,703

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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