Business Segment Data (Schedule of Certain Segment Data) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 02, 2019	Dec. 01, 2018	Sep. 01, 2018	Jun. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 03, 2017	Mar. 02, 2019	Mar. 03, 2018	Mar. 04, 2017
Segment Reporting Information [Line Items]
Revenues	$ 346,255	$ 357,718	$ 362,133	$ 336,531	$ 353,453	$ 356,506	$ 343,907	$ 272,307	$ 1,402,637	$ 1,326,173	$ 1,114,533
Operating Income (Loss)	(14,778)								67,284	114,284	122,225
Depreciation and Amortization									49,798	54,843	35,607
Capital Expenditures									60,717	53,196	68,061
Identifiable Assets	1,068,168				1,022,320				1,068,168	1,022,320	784,658
Architectural Glass
Segment Reporting Information [Line Items]
Revenues									367,203	384,137	411,881
Operating Income (Loss)									16,503	32,764	44,656
Depreciation and Amortization									13,009	14,525	15,912
Capital Expenditures									27,722	26,228	44,439
Identifiable Assets	281,817				250,407				281,817	250,407	254,840
Architectural Services
Segment Reporting Information [Line Items]
Revenues									286,314	213,757	270,937
Operating Income (Loss)									30,509	10,420	18,494
Depreciation and Amortization									1,234	1,325	1,364
Capital Expenditures									1,433	2,510	1,981
Identifiable Assets	59,227				53,424				59,227	53,424	70,875
Architectural Framing Systems
Segment Reporting Information [Line Items]
Revenues									720,829	677,198	385,978
Operating Income (Loss)									49,660	59,031	44,768
Depreciation and Amortization									28,937	31,764	12,404
Capital Expenditures									19,098	15,273	14,070
Identifiable Assets	617,001				618,455				617,001	618,455	359,633
Large-Scale Optical
Segment Reporting Information [Line Items]
Revenues									88,493	88,303	89,710
Operating Income (Loss)									23,003	22,000	22,467
Depreciation and Amortization									3,692	4,556	4,785
Capital Expenditures									6,989	3,307	1,510
Identifiable Assets	61,031				58,523				61,031	58,523	58,198
Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									(60,202)	(37,222)	(43,973)
Corporate and other
Segment Reporting Information [Line Items]
Operating Income (Loss)									(52,391)	(9,931)	(8,160)
Depreciation and Amortization									2,926	2,673	1,142
Capital Expenditures									5,475	5,878	6,061
Identifiable Assets	$ 49,092				$ 41,511				$ 49,092	$ 41,511	$ 41,112