Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 01, 2019	Mar. 02, 2019
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 185,832	$ 180,956
Goodwill adjustments for purchase accounting		6,267
Foreign currency translation	(595)	(1,391)
Goodwill, Ending	185,237	185,832
Architectural Glass
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	25,709	25,971
Goodwill adjustments for purchase accounting		0
Foreign currency translation	(17)	(262)
Goodwill, Ending	25,692	25,709
Architectural Framing Systems
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	148,446	143,308
Goodwill adjustments for purchase accounting		6,267
Foreign currency translation	(578)	(1,129)
Goodwill, Ending	147,868	148,446
Architectural Services
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	1,120	1,120
Goodwill adjustments for purchase accounting		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
Goodwill adjustments for purchase accounting		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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