Goodwill and Acquisition-Related Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 24, 2013	Jun. 24, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	79,238	79,238
Accumulated Amortization	(55,685)	(50,662)
Total	23,553	28,576
Estimated amortization expense for the next five years and thereafter [Abstract]
Fiscal year 2013	1,630
Fiscal year 2014	6,420
Fiscal year 2015	6,220
Fiscal year 2016	4,681
Fiscal year 2017	1,463
Fiscal Year 2018 and thereafter	3,139
Total	23,553	28,576
Goodwill [Line Items]
Total goodwill	52,149	52,149
Energy-Saving Products [Member]
Goodwill [Line Items]
Total goodwill	33,190	33,190
HiRel [Member]
Goodwill [Line Items]
Total goodwill	18,959	18,959
Completed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	52,045	52,045
Accumulated Amortization	(38,012)	(34,556)
Total	14,033	17,489
Estimated amortization expense for the next five years and thereafter [Abstract]
Total	14,033	17,489
Completed Technology [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	12 years	12 years
Completed Technology [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	4 years	4 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,430	10,430
Accumulated Amortization	(7,101)	(6,463)
Total	3,329	3,967
Estimated amortization expense for the next five years and thereafter [Abstract]
Total	3,329	3,967
Customer Lists [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	12 years	12 years
Customer Lists [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	5 years	5 years
Intellectual Property and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,763	16,763
Accumulated Amortization	(10,572)	(9,643)
Total	6,191	7,120
Estimated amortization expense for the next five years and thereafter [Abstract]
Total	6,191	7,120
Intellectual Property and Other [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	15 years	15 years
Intellectual Property and Other [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Periods (Years)	2 years	2 years