Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 02, 2017	Aug. 27, 2016	Sep. 02, 2017	Aug. 27, 2016
Sales and operating income data
Net sales	$ 343,907	$ 278,455	$ 616,214	$ 526,335
Operating income (loss)	27,774	33,048	51,880	59,297
Architectural Glass
Sales and operating income data
Net sales	97,351	99,205	195,086	192,565
Operating income (loss)	10,258	9,616	19,581	19,147
Architectural Services
Sales and operating income data
Net sales	46,829	77,734	96,979	140,554
Operating income (loss)	774	6,236	1,555	9,418
Architectural Framing Systems
Sales and operating income data
Net sales	189,023	92,229	299,515	173,362
Operating income (loss)	16,542	13,001	28,506	23,232
Large-Scale Optical
Sales and operating income data
Net sales	20,291	21,270	38,894	41,298
Operating income (loss)	4,248	5,051	8,298	9,703
Intersegment eliminations
Sales and operating income data
Net sales	(9,587)	(11,983)	(14,260)	(21,444)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (4,048)	$ (856)	$ (6,060)	$ (2,203)