Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2016	Feb. 28, 2015
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 75,857	$ 78,021
Foreign currency translation	(1,861)	(2,164)
Goodwill, Ending	73,996	75,857
Architectural Glass
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
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
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	37,825	39,716
Foreign currency translation	(1,145)	(1,891)
Goodwill, Ending	36,680	37,825
Large-Scale Optical
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