Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Nov. 28, 2015	Feb. 28, 2015
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 75,857	$ 78,021
Foreign currency translation	(1,713)	(2,164)
Goodwill, Ending	74,144	75,857
Architectural Glass [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	26,355	26,628
Foreign currency translation	(716)	(273)
Goodwill, Ending	25,639	26,355
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	39,716
Foreign currency translation	(997)	(1,891)
Goodwill, Ending	36,828	37,825
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