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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
May 31, 2014 | Jun. 01, 2013
Sales and operating income data |  |
Net sales | $ 210,883 | $ 179,311
Operating income (loss) | 7,817 | 6,115
Architectural Glass [Member] |  |
Sales and operating income data |  |
Net sales | 79,634 | 74,803
Operating income (loss) | 2,800 | 1,371
Architectural Services segment [Member] |  |
Sales and operating income data |  |
Net sales | 51,616 | 46,476
Operating income (loss) | 184 | (965)
Architectural Framing Systems Segment [Member] |  |
Sales and operating income data |  |
Net sales | 64,222 | 44,446
Operating income (loss) | 1,931 | 2,064
Large-Scale Optical [Member] |  |
Sales and operating income data |  |
Net sales | 20,061 | 19,473
Operating income (loss) | 3,964 | 4,698
Intersegment eliminations [Member] |  |
Sales and operating income data |  |
Net sales | (4,650) | (5,887)
Corporate and other [Member] |  |
Sales and operating income data |  |
Operating income (loss) | $ (1,062) | $ (1,053)

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