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Shareholders' Equity (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | ---
Mar. 25, 2012 Common Stock [Member] | Mar. 25, 2012 Common Stock [Member] | Mar. 25, 2012 Rudd Lighting, Inc. [Member] | Aug. 17, 2011 Rudd Lighting, Inc. [Member] Common Stock [Member]
Class of Stock [Line Items] |  |  |  |  |
Shares issued for acquisition |  |  |  | 6,074,833 |
Value of shares issued for acquisition |  |  |  | $ 211,040,000 | [1]
Business Acquisitions_Purchase Price Adjustment_Common Stock refunded |  |  | 15,895 |  |
Expiration of transfer restrictions under stock purchase agreement |  |  |  | 25.00% |
Stock Repurchase Program, Authorized Amount |  | $ 200,000,000 |  |  |
Repurchased shares | 0 |  |  |  |
[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 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, each of which were received in the fourth quarter of fiscal 2012.

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 99-12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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