Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
May 30, 2020	Feb. 29, 2020
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 185,516	$ 185,832
Adjustment (1)	6,315
Foreign currency translation	(1,287)	(316)
Goodwill, Ending	190,544	185,516
Architectural Framing Systems
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	148,183	148,446
Adjustment (1)	6,315
Foreign currency translation	(955)	(263)
Goodwill, Ending	153,543	148,183
Architectural Glass
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	25,656	25,709
Adjustment (1)	0
Foreign currency translation	(332)	(53)
Goodwill, Ending	25,324	25,656
Architectural Services
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	1,120	1,120
Adjustment (1)	0
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
Adjustment (1)	0
Foreign currency translation	0	0
Goodwill, Ending	$ 10,557	$ 10,557

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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