Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 26, 2023	Aug. 27, 2022	Aug. 26, 2023	Aug. 27, 2022
Sales and operating income data
Segment net sales	$ 353,675	$ 372,109	$ 715,388	$ 728,744
Segment operating income (loss)	40,553	32,072	74,320	65,288
Intersegment eliminations
Sales and operating income data
Segment net sales	(10,931)	(10,008)	(22,456)	(21,480)
Architectural Framing Systems
Sales and operating income data
Segment operating income (loss)	21,060	20,512	41,005	44,177
Architectural Framing Systems | Operating Segments [Member]
Sales and operating income data
Segment net sales	158,801	172,867	322,963	336,159
Architectural Glass
Sales and operating income data
Segment operating income (loss)	17,434	6,457	33,955	11,626
Architectural Glass | Operating Segments [Member]
Sales and operating income data
Segment net sales	94,096	77,352	191,298	153,617
Architectural Services
Sales and operating income data
Segment operating income (loss)	3,519	5,490	2,923	8,417
Architectural Services | Operating Segments [Member]
Sales and operating income data
Segment net sales	88,064	106,732	177,482	210,120
Large-Scale Optical
Sales and operating income data
Segment operating income (loss)	4,663	5,991	10,188	12,489
Large-Scale Optical | Operating Segments [Member]
Sales and operating income data
Segment net sales	23,645	25,166	46,101	50,328
Corporate and other*
Sales and operating income data
Segment operating income (loss)	$ (6,123)	$ (6,378)	$ (13,751)	$ (11,421)