Goodwill and Other Identifiable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014	Mar. 02, 2013
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 61,342	$ 61,617
Goodwill, Acquired During Period	18,254
Foreign currency translation	(1,575)	(275)
Goodwill, Ending	78,021	61,342
Architectural Glass
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	27,002	27,277
Goodwill, Acquired During Period	0
Foreign currency translation	(374)	(275)
Goodwill, Ending	26,628	27,002
Architectural Services
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	1,120	1,120
Goodwill, Acquired During Period	0
Foreign currency translation	0	0
Goodwill, Ending	1,120	1,120
Architectural Framing Systems
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	22,663	22,663
Goodwill, Acquired During Period	18,254
Foreign currency translation	(1,201)	0
Goodwill, Ending	39,716	22,663
Large-Scale Optical
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	10,557	10,557
Goodwill, Acquired During Period	0
Foreign currency translation	0	0
Goodwill, Ending	$ 10,557	$ 10,557