Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Nov. 28, 2015	Feb. 27, 2016
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 75,857	$ 75,857
Foreign currency translation	312	(1,861)
Goodwill, Ending	74,308	73,996
Architectural Glass [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	26,355	26,355
Foreign currency translation	323	(716)
Goodwill, Ending	25,962	25,639
Architectural Services segment [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	1,120	1,120
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	37,825	37,825
Foreign currency translation	(11)	(1,145)
Goodwill, Ending	36,669	36,680
Large-Scale Optical [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	10,557	10,557
Foreign currency translation	0	0
Goodwill, Ending	$ 10,557	$ 10,557