Business Segment Data (Schedule of Certain Segment Data) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 25, 2023	Feb. 26, 2022	Feb. 27, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,440,696	$ 1,313,977	$ 1,230,774
Operating Income (Loss)	125,788	22,045	25,527
Depreciation and Amortization	42,403	49,993	51,440
Capital Expenditures	45,177	21,841	26,165
Identifiable Assets	915,365	887,863	1,015,099
Intersegment elimination
Segment Reporting Information [Line Items]
Revenues	(40,478)	(50,915)	(36,987)
Architectural Framing Systems
Segment Reporting Information [Line Items]
Revenues	649,778	546,557	508,770
Operating Income (Loss)	81,875	38,088	(29,030)
Depreciation and Amortization	19,386	20,361	21,532
Capital Expenditures	11,432	7,344	9,871
Identifiable Assets	426,946	414,012	396,664
Architectural Services
Segment Reporting Information [Line Items]
Revenues	410,627	407,421	358,685
Operating Income (Loss)	18,140	(22,071)	15,451
Depreciation and Amortization	3,953	7,495	7,196
Capital Expenditures	3,683	3,449	1,516
Identifiable Assets	141,840	114,120	194,409
Architectural Glass
Segment Reporting Information [Line Items]
Revenues	316,554	309,241	330,256
Operating Income (Loss)	28,610	1,785	18,678
Depreciation and Amortization	11,964	14,564	15,102
Capital Expenditures	5,613	5,865	9,574
Identifiable Assets	207,730	225,362	271,520
Large-Scale Optical
Segment Reporting Information [Line Items]
Revenues	104,215	101,673	70,050
Operating Income (Loss)	25,348	23,618	31,203
Depreciation and Amortization	3,088	3,185	3,338
Capital Expenditures	13,474	2,250	869
Identifiable Assets	69,035	56,926	64,474
Corporate and other
Segment Reporting Information [Line Items]
Operating Income (Loss)	(28,185)	(19,375)	(10,775)
Depreciation and Amortization	4,012	4,388	4,272
Capital Expenditures	10,975	2,933	4,335
Identifiable Assets	$ 69,814	$ 77,443	$ 88,032