Goodwill By Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2013	Jan. 15, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 202,741		$ 176,232
Accumulated impairment of goodwill	(131,654)		(131,654)
Total	71,087	26,509	44,578
Laser Products
Goodwill [Line Items]
Goodwill	84,592		84,592
Accumulated impairment of goodwill	(54,099)		(54,099)
Total	30,493		30,493
Precision Technologies
Goodwill [Line Items]
Goodwill	118,149		91,640
Accumulated impairment of goodwill	(77,555)		(77,555)
Total	$ 40,594		$ 14,085

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

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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Amount before 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.

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