Acquisitions (Schedule of Initial Purchase Price) (Details) (USD $)	3 Months Ended			12 Months Ended			1 Months Ended
	Jun. 24, 2012	Jun. 24, 2012 Rudd Lighting, Inc. [Member]	Sep. 25, 2011 Rudd Lighting, Inc. [Member]	Jun. 26, 2011 Rudd Lighting, Inc. [Member]	Aug. 17, 2011 Rudd Lighting, Inc. [Member]		Aug. 17, 2011 Common Stock [Member] Rudd Lighting, Inc. [Member]
Business Acquisition, Cost of Acquired Entity [Abstract]
Cash consideration for acquisition					$ 372,235,000
Fair value of common stock issued by the Company							211,040,000	[1]
Debt repayment of acquiree					84,991,000
Business Acquisition, Working Capital Adjustment					(2,260,000)	[2],[3],[4],[5]
Total purchase price					666,006,000
Shares issued for acquisition							6,074,833
Common stock, closing market price per share							$ 34.74
Expiration of transfer restrictions under stock purchase agreement							25.00%
Business Acquisition - Purchase Price Adjustment Cash Refund		1,000,000
Post Closing Working Capital Adjustment, Stock		15,895
Cash, Returned From Escrow		300,000
Post Closing Indemnification Obligations, Stock		5,069
Insurance proceeds recovered related to liabilities assumed in the acquisition		400,000
Business Acquisition, Purchase Price Allocation, Preclosing Taxes Paid	200,000
Transaction cost					3,600,000
Transaction cost expensed			$ 3,100,000	$ 500,000

[1] Represents 6,074,833 shares of the Company's common stock at $34.74 per share, the closing share price on August 17, 2011. The shares are subject to certain transfer restrictions under the Stock Purchase Agreement that will generally lapse with respect to 25% of the shares held (i) at the completion of the consecutive six-month period following the date of the closing of the transaction; and, (ii) at the completion of each of the following three successive six-month periods, such that all restrictions will lapse by the second anniversary of the closing.

[2] In accordance with the Stock Purchase Agreement, the sellers have certain post-closing indemnification obligations to the Company. During the fourth quarter of fiscal 2012, the Company received approximately $0.3 million in cash and the return of 5,069 shares of the Company's common stock from escrow in connection with these indemnification obligations.

[3] The Company paid approximately $0.2 million related to pre-closing taxes during the fourth quarter of fiscal 2012.

[4] In accordance with the Stock Purchase Agreement, the post-closing working capital adjustment was composed of approximately $1.0 million in cash and the return of 15,895 shares of the Company's common stock from escrow during the fourth quarter of fiscal 2012.

[5] The Company recovered approximately $0.4 million in insurance proceeds related to liabilities assumed in the acquisition during the fourth quarter of fiscal 2012.