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Segment Information (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 02, 2013 Reportable_Segment Customer | Dec. 01, 2012 Reportable_Segment | Mar. 02, 2013 Reportable_Segment Customer | Mar. 03, 2012 | Feb. 26, 2011
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | 4 | 2 |  |  |
Number of operating segments |  |  | 3 |  |
Export net sales |  |  | $ 63,500,000 | $ 75,700,000 | $ 79,400,000
Number of customers that account for 10% or more of consolidated net sales | 0 |  | 0 |  |
Marketable securities | 38,800,000 |  | 38,800,000 |  |
Corporate and other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Marketable securities | 38,800,000 |  | 38,800,000 | 19,600,000 |
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restricted investments | $ 26,400,000 |  | $ 26,400,000 | $ 23,100,000 |
Geographic Concentration Risk | Net export sales |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Export net sales as a percentage of consolidated net sales (percentage) |  |  | 9.00% | 11.00% | 14.00%

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- Definition Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 + Details
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