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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 01, 2012 | Nov. 26, 2011 | Dec. 01, 2012 Segment | Nov. 26, 2011
Segment Reporting Information [Line Items] |  |  |  |
Number of Reportable Segments |  |  | 2 |
Sales and operating income data |  |  |  |
Net sales | $ 190,416 | $ 174,853 | $ 520,490 | $ 493,748
Operating income (loss) | 11,411 | 7,156 | 21,282 | 1,051
Architectural [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 168,770 | 152,087 | 460,015 | 436,516
Operating income (loss) | 5,837 | 580 | 6,978 | (11,597)
Large-Scale Optical [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 21,648 | 22,769 | 60,477 | 57,235
Operating income (loss) | 6,557 | 7,411 | 17,021 | 15,559
Intersegment eliminations [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | (2) | (3) | (2) | (3)
Corporate and other [Member] |  |  |  |
Sales and operating income data |  |  |  |
Operating income (loss) | $ (983) | $ (835) | $ (2,717) | $ (2,911)

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