Goodwill and Other Identifiable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Nov. 30, 2013	Mar. 02, 2013
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	$ 61,342	$ 61,617
Goodwill, Acquired During Period	31,017
Foreign currency translation	(850)	(275)
Goodwill, Ending	91,509	61,342
Architectural Glass [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	27,002	27,277
Goodwill, Acquired During Period	0
Foreign currency translation	(223)	(275)
Goodwill, Ending	26,779	27,002
Architectural Services segment [Member]
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 Segment [Member]
Schedule of goodwill attributable to each business segment
Goodwill, Beginning	22,663	22,663
Goodwill, Acquired During Period	31,017
Foreign currency translation	627	0
Goodwill, Ending	53,053	22,663
Large-Scale Optical [Member]
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