Business, Basis of Presentation and Summary of Significant Accounting Policies, Goodwill, Other Accrued Expenses, and Warranty (Details) (USD $)	12 Months Ended
	Jun. 26, 2011	Jun. 27, 2010	Jun. 28, 2009
Goodwill [Line Items]
Total goodwill	$ 74,955,000
Total goodwill	121,570,000	74,955,000
Changes in the carrying amount of goodwill [Roll Forward]
Impairment	0	0	(23,867,000)
Goodwill deductible for income tax purposes	17,200,000
Goodwill deducted for income tax purposes	3,000,000	3,000,000	3,000,000
Other Accrued Expenses [Abstract]
Sales returns	34,112,000	27,306,000
Accrued accounting and legal costs	9,943,000	10,855,000
Deferred revenue	16,329,000	10,200,000
Accrued employee benefits	3,733,000	3,422,000
Accrued divestiture liability	0	295,000
Accrued warranty	3,457,000	2,293,000
Accrued utilities	1,840,000	1,483,000
Accrued repurchase obligation	3,099,000	3,518,000
Accrued sales and other taxes	2,829,000	2,329,000
Accrued enterprise resource planning system costs	8,110,000	176,000
Severance liability	214,000	4,249,000
Other	13,736,000	9,133,000
Total other accrued expenses	97,402,000	75,259,000
Changes in warranty reserve [Roll Forward]
Accrued warranty, beginning of period	2,293,000	1,767,000	2,672,000
Accruals for warranties issued during the year	5,005,000	4,000,000	3,574,000
Changes in estimates related to pre-existing warranties	(1,228,000)	(1,324,000)	1,024,000
Warranty claim settlements	(2,613,000)	(2,150,000)	(5,503,000)
Accrued warranty, end of period	3,457,000	2,293,000	1,767,000
Energy-Saving Products [Member]
Goodwill [Line Items]
Total goodwill	33,190,000	33,190,000
HiRel [Member]
Goodwill [Line Items]
Total goodwill	18,959,000	18,959,000
Enterprise Power [Member]
Goodwill [Line Items]
Total goodwill	22,806,000
Total goodwill	69,421,000
Changes in the carrying amount of goodwill [Roll Forward]
Additions due to acquisitions	46,615,000
Automotive Products [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Impairment			(3,800,000)
Intellectual Property [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Impairment			$ (20,100,000)