Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 03, 2017	May 28, 2016
Sales and operating income data
Net sales	$ 272,307	$ 247,880
Operating income (loss)	24,106	26,249
Architectural Glass
Sales and operating income data
Net sales	97,735	93,360
Operating income (loss)	9,322	9,531
Architectural Services
Sales and operating income data
Net sales	50,150	62,820
Operating income (loss)	782	3,181
Architectural Framing Systems
Sales and operating income data
Net sales	110,492	81,132
Operating income (loss)	11,964	10,232
Large-Scale Optical
Sales and operating income data
Net sales	18,603	20,028
Operating income (loss)	4,050	4,652
Intersegment eliminations
Sales and operating income data
Net sales	(4,673)	(9,460)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (2,012)	$ (1,347)