GOODWILL AND INTANGIBLE ASSETS (Details 2) $ in Thousands	9 Months Ended
Oct. 03, 2015 USD ($)
Changes in the carrying amount of goodwill:
Goodwill, Beginning Balance	$ 97,524
Goodwill allocated to acquisition	6,681
Foreign currency impact	(351)
Goodwill, Ending Balance	103,854
Photonics
Changes in the carrying amount of goodwill:
Goodwill, Beginning Balance	51,350
Goodwill, Ending Balance	51,350
Lasers
Changes in the carrying amount of goodwill:
Goodwill, Beginning Balance	25,199
Goodwill allocated to acquisition	6,681
Foreign currency impact	(351)
Goodwill, Ending Balance	31,529
Optics
Changes in the carrying amount of goodwill:
Goodwill, Beginning Balance	20,975
Goodwill, Ending Balance	$ 20,975

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=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

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-Topic 350

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-Section 50

-Paragraph 1

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