Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2021	Feb. 29, 2020
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 185,516	$ 185,832
Adjustment (1)	6,315
Impairment	(63,769)
Foreign currency translation	2,036	(316)
Goodwill, Ending	130,098	185,516
Architectural Framing Systems
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	148,183	148,446
Adjustment (1)	6,315
Impairment	(63,769)
Foreign currency translation	2,370	(263)
Goodwill, Ending	93,099	148,183
Architectural Glass
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	25,656	25,709
Foreign currency translation	(334)	(53)
Goodwill, Ending	25,322	25,656
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
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