Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	May 30, 2020	Jun. 01, 2019
Sales and operating income data
Net sales	$ 289,095	$ 355,365
Operating income (loss) from operations	6,469	23,041
Architectural Framing Systems
Sales and operating income data
Net sales	150,164	180,522
Operating income (loss) from operations	7,296	12,273
Architectural Glass
Sales and operating income data
Net sales	76,911	100,291
Operating income (loss) from operations	(494)	6,399
Architectural Services
Sales and operating income data
Net sales	63,551	65,147
Operating income (loss) from operations	5,343	4,573
Large-Scale Optical
Sales and operating income data
Net sales	6,312	21,259
Operating income (loss) from operations	(3,132)	4,177
Intersegment eliminations
Sales and operating income data
Net sales	(7,843)	(11,854)
Corporate and other
Sales and operating income data
Operating income (loss) from operations	$ (2,544)	$ (4,381)