Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 02, 2017	Nov. 26, 2016	Dec. 02, 2017	Nov. 26, 2016
Sales and operating income data
Net sales	$ 356,506	$ 274,072	$ 972,721	$ 800,407
Operating income (loss)	34,535	33,259	86,415	92,557
Architectural Glass
Sales and operating income data
Net sales	96,940	107,002	292,026	299,567
Operating income (loss)	9,107	11,708	28,687	30,855
Architectural Services
Sales and operating income data
Net sales	49,077	64,380	146,056	204,934
Operating income (loss)	2,547	4,918	4,102	14,336
Architectural Framing Systems
Sales and operating income data
Net sales	194,157	90,850	493,672	264,212
Operating income (loss)	18,452	11,838	46,958	35,070
Large-Scale Optical
Sales and operating income data
Net sales	26,003	22,084	64,897	63,382
Operating income (loss)	6,724	5,910	15,022	15,613
Intersegment eliminations
Sales and operating income data
Net sales	(9,671)	(10,244)	(23,930)	(31,688)
Corporate and other
Sales and operating income data
Operating income (loss)	$ (2,295)	$ (1,115)	$ (8,354)	$ (3,317)