Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 01, 2019	Jun. 02, 2018
Sales and operating income data
Net sales	$ 355,365	$ 336,531
Operating income (loss)	23,041	21,995
Architectural Glass
Sales and operating income data
Net sales	100,291	76,925
Operating income (loss)	6,399	1,579
Architectural Services
Sales and operating income data
Net sales	65,147	70,727
Operating income (loss)	4,573	5,155
Architectural Framing Systems
Sales and operating income data
Net sales	180,522	179,037
Operating income (loss)	12,273	12,339
Large-Scale Optical
Sales and operating income data
Net sales	21,259	20,761
Operating income (loss)	4,177	4,981
Intersegment eliminations
Sales and operating income data
Net sales	(11,854)	(10,919)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (4,381)	$ (2,059)