Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 02, 2018	Jun. 03, 2017
Sales and operating income data
Net sales	$ 336,531	$ 272,307
Operating income (loss)	21,995	24,106
Architectural Glass
Sales and operating income data
Net sales	76,925	97,735
Operating income (loss)	1,579	9,322
Architectural Services
Sales and operating income data
Net sales	70,727	50,150
Operating income (loss)	5,155	782
Architectural Framing Systems
Sales and operating income data
Net sales	179,037	110,492
Operating income (loss)	12,339	11,964
Large-Scale Optical
Sales and operating income data
Net sales	20,761	18,603
Operating income (loss)	4,981	4,050
Intersegment eliminations
Sales and operating income data
Net sales	(10,919)	(4,673)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (2,059)	$ (2,012)