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Reportable Segments (Revenues, Gross Profit and Gross Margin, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 25, 2018	Mar. 26, 2017	Mar. 25, 2018	Mar. 26, 2017
Segment Reporting Information [Line Items]
Revenue, net	$ 355,958	$ 341,505	$ 1,084,226	$ 1,114,064
Gross profit	99,056	86,076	291,991	336,574
Cost of revenue, net	$ 256,902	$ 255,429	$ 792,235	$ 777,490
Gross margin	27.80%	25.20%	26.90%	30.20%
Power and RF Products
Segment Reporting Information [Line Items]
Revenue, net	$ 81,902	$ 56,133	$ 218,628	$ 160,401
Gross profit	$ 39,285	$ 26,396	$ 105,816	$ 74,737
Gross margin	48.00%	47.00%	48.40%	46.60%
LED Products
Segment Reporting Information [Line Items]
Revenue, net	$ 143,298	$ 131,327	$ 440,500	$ 406,858
Gross profit	$ 37,764	$ 32,385	$ 115,180	$ 115,499
Gross margin	26.40%	24.70%	26.10%	28.40%
Lighting Products
Segment Reporting Information [Line Items]
Revenue, net	$ 130,758	$ 154,045	$ 425,098	$ 546,805
Gross profit	$ 24,956	$ 35,355	$ 79,803	$ 159,415
Gross margin	19.10%	23.00%	18.80%	29.20%
Total segment gross profit
Segment Reporting Information [Line Items]
Gross profit	$ 102,005	$ 94,136	$ 300,799	$ 349,651
Unallocated Costs
Segment Reporting Information [Line Items]
Cost of revenue, net	(2,949)	(3,459)	(8,808)	(13,077)
Depreciation Expense on Reclassified Assets	$ 0	$ (4,601)	$ 0	$ 0

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- Definition

Gross profit (aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity), as percent of revenue.

+ References

No definition available.

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- Definition

Total costs related to goods produced and sold during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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For the asset that is reclassified back to held and use from held-for-sale, the depreciation expense recognized when the asset is reclassified. This represents the difference between the carrying value at the time the decision to reclassify is made and the carrying amount that the asset would have had if it had never been classified as held for sale (including consideration of depreciation expense).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2459-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 44
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1756-110224

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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