Business Segment Data (Schedule of Certain Segment Data) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Mar. 02, 2019
Segment Reporting Information [Line Items]
Revenues	$ 1,230,774	$ 1,387,439	$ 1,402,637
Operating (Loss) Income	25,527	87,848	67,284
Depreciation and Amortization	51,440	46,795	49,798
Capital Expenditures	26,165	51,428	60,717
Identifiable Assets	1,015,099	1,128,991	1,068,168
Intersegment elimination
Segment Reporting Information [Line Items]
Revenues	(36,189)	(43,399)	(60,202)
Architectural Framing Systems
Segment Reporting Information [Line Items]
Revenues	570,850	686,596	720,829
Operating (Loss) Income	(44,761)	36,110	49,660
Depreciation and Amortization	27,298	25,432	28,937
Capital Expenditures	9,907	22,744	19,098
Identifiable Assets	511,608	604,870	617,001
Architectural Glass
Segment Reporting Information [Line Items]
Revenues	330,256	387,191	367,203
Operating (Loss) Income	18,678	20,760	16,503
Depreciation and Amortization	15,102	13,570	13,009
Capital Expenditures	9,574	19,862	27,722
Identifiable Assets	271,520	291,104	281,817
Architectural Services
Segment Reporting Information [Line Items]
Revenues	295,807	269,140	286,314
Operating (Loss) Income	31,182	23,582	30,509
Depreciation and Amortization	1,430	1,305	1,234
Capital Expenditures	1,480	1,749	1,433
Identifiable Assets	79,465	107,538	59,227
Large-Scale Optical
Segment Reporting Information [Line Items]
Revenues	70,050	87,911	88,493
Operating (Loss) Income	31,203	22,642	23,003
Depreciation and Amortization	3,338	3,256	3,692
Capital Expenditures	869	3,153	6,989
Identifiable Assets	64,474	62,831	61,031
Corporate and other
Segment Reporting Information [Line Items]
Operating (Loss) Income	(10,775)	(15,246)	(52,391)
Depreciation and Amortization	4,272	3,232	2,926
Capital Expenditures	4,335	3,920	5,475
Identifiable Assets	$ 88,032	$ 62,648	$ 49,092