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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 01, 2012 | Aug. 27, 2011 | Sep. 01, 2012 Segment | Aug. 27, 2011
Segment Reporting Information [Line Items] |  |  |  |
Number of Reportable Segments |  |  | 2 |
Sales and operating income data |  |  |  |
Net sales | $ 175,940 | $ 165,557 | $ 330,074 | $ 318,895
Operating income (loss) | 7,553 | (2,677) | 9,870 | (6,105)
Architectural [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 156,368 | 149,142 | 291,245 | 284,429
Operating income (loss) | 3,030 | (5,123) | 1,140 | (12,176)
Large-Scale Optical [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 19,571 | 16,415 | 38,829 | 34,466
Operating income (loss) | 5,196 | 3,516 | 10,464 | 8,148
Intersegment eliminations [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 1 | 0 | 0 | 0
Corporate and other [Member] |  |  |  |
Sales and operating income data |  |  |  |
Operating income (loss) | $ (673) | $ (1,070) | $ (1,734) | $ (2,077)

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