Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Aug. 29, 2015	Feb. 28, 2015
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 73,996	$ 75,857
Foreign currency translation	895	(1,861)
Goodwill, Ending	74,891	73,996
Architectural Glass [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	25,639	26,355
Foreign currency translation	347	(716)
Goodwill, Ending	25,986	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	36,680	37,825
Foreign currency translation	548	(1,145)
Goodwill, Ending	37,228	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