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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Jun. 01, 2013 | Jun. 02, 2012
Sales and operating income data |  |
Net sales | $ 179,311 | $ 154,134
Operating income (loss) | 6,115 | 2,318
Architectural Glass [Member] |  |
Sales and operating income data |  |
Net sales | 74,803 | 59,066
Operating income (loss) | 1,371 | (2,406)
Architectural Services segment [Member] |  |
Sales and operating income data |  |
Net sales | 46,476 | 38,918
Operating income (loss) | (965) | (2,579)
Architectural Framing Segment [Member] |  |
Sales and operating income data |  |
Net sales | 44,446 | 42,407
Operating income (loss) | 2,064 | 3,096
Large-Scale Optical [Member] |  |
Sales and operating income data |  |
Net sales | 19,473 | 19,258
Operating income (loss) | 4,698 | 5,268
Intersegment eliminations [Member] |  |
Sales and operating income data |  |
Net sales | (5,887) | (5,515)
Corporate and other [Member] |  |
Sales and operating income data |  |
Operating income (loss) | $ (1,053) | $ (1,061)

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