Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	May 29, 2021	May 30, 2020
Sales and operating income data
Net sales	$ 326,006	$ 289,095
Operating income (loss)	16,042	6,469
Intersegment eliminations
Sales and operating income data
Net sales	(8,749)	(7,843)
Architectural Framing Systems
Sales and operating income data
Net sales	151,840	150,164
Operating income (loss)	8,060	7,296
Architectural Glass
Sales and operating income data
Net sales	83,031	76,911
Operating income (loss)	2,128	(494)
Architectural Services
Sales and operating income data
Net sales	75,656	63,551
Operating income (loss)	4,537	5,343
Large-Scale Optical
Sales and operating income data
Net sales	24,228	6,312
Operating income (loss)	5,847	(3,132)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (4,530)	$ (2,544)