Goodwill and Other Identifiable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
Nov. 29, 2014	Mar. 01, 2014
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 78,021us-gaap_Goodwill	$ 61,342us-gaap_Goodwill
Goodwill, Acquired During Period		18,254us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency translation	(492)us-gaap_GoodwillTranslationAdjustments	(1,575)us-gaap_GoodwillTranslationAdjustments
Goodwill, Ending	77,529us-gaap_Goodwill	78,021us-gaap_Goodwill
Architectural Glass [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	26,628	27,002
Goodwill, Acquired During Period		0
Foreign currency translation	(90)	(374)
Goodwill, Ending	26,538	26,628
Architectural Services segment [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	1,120	1,120
Goodwill, Acquired During Period		0
Foreign currency translation	0	0
Goodwill, Ending	1,120	1,120
Architectural Framing Systems Segment [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	39,716	22,663
Goodwill, Acquired During Period		18,254
Foreign currency translation	(402)	(1,201)
Goodwill, Ending	39,314	39,716
Large-Scale Optical [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	10,557	10,557
Goodwill, Acquired During Period		0
Foreign currency translation	0	0
Goodwill, Ending	$ 10,557	$ 10,557

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 45

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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