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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 30, 2013 | Dec. 01, 2012 | Nov. 30, 2013 | Dec. 01, 2012
Sales and operating income data |  |  |  |
Net sales | $ 199,430 | $ 190,416 | $ 557,028 | $ 520,490
Operating income (loss) | 12,707 | 11,411 | 28,180 | 21,282
Architectural Glass [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 73,365 | 74,921 | 218,142 | 197,264
Operating income (loss) | 1,641 | 461 | 3,782 | (3,963)
Architectural Services segment [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 51,167 | 49,125 | 139,820 | 134,696
Operating income (loss) | 351 | (196) | (1,401) | (3,794)
Architectural Framing Systems Segment [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 58,981 | 51,605 | 152,877 | 146,182
Operating income (loss) | 5,782 | 5,573 | 13,026 | 14,735
Large-Scale Optical [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | 22,699 | 21,648 | 61,917 | 60,477
Operating income (loss) | 6,058 | 6,557 | 16,072 | 17,021
Intersegment eliminations [Member] |  |  |  |
Sales and operating income data |  |  |  |
Net sales | (6,782) | (6,883) | (15,728) | (18,129)
Corporate and other [Member] |  |  |  |
Sales and operating income data |  |  |  |
Operating income (loss) | $ (1,125) | $ (984) | $ (3,299) | $ (2,717)

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