Segment Information (Schedule of Certain Segment Data) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	Jun. 01, 2013	Mar. 02, 2013	Dec. 01, 2012	Sep. 01, 2012	Jun. 02, 2012	Mar. 01, 2014	Mar. 02, 2013	Mar. 03, 2012
Segment Reporting Information [Line Items]
Net sales	$ 214,417	$ 199,430	$ 178,287	$ 179,311	$ 179,734	$ 190,416	$ 175,940	$ 154,134	$ 771,445	$ 700,224	$ 662,463
Operating Income (Loss)									40,285	27,419	3,816
Depreciation and Amortization									26,550	26,529	27,246
Capital Expenditures									41,852	34,664	9,650
Identifiable Assets	565,357				520,141				565,357	520,141	493,104
Architectural glass
Segment Reporting Information [Line Items]
Net sales									293,810	266,456	278,087
Operating Income (Loss)									3,861	(4,391)	(19,595)
Depreciation and Amortization									11,624	12,230	13,585
Capital Expenditures									31,568	17,373	4,335
Identifiable Assets	205,606				180,662				205,606	180,662	172,265
Architectural Services
Segment Reporting Information [Line Items]
Net sales									203,351	186,570	149,779
Operating Income (Loss)									4,479	(1,008)	(2,879)
Depreciation and Amortization									1,421	844	509
Capital Expenditures									1,195	3,939	358
Identifiable Assets	66,567				54,696				66,567	54,696	42,433
Architectural framing systems
Segment Reporting Information [Line Items]
Net sales									216,059	191,137	174,930
Operating Income (Loss)									14,930	14,584	10,402
Depreciation and Amortization									6,436	6,477	6,884
Capital Expenditures									7,008	8,151	2,232
Identifiable Assets	184,382				111,782				184,382	111,782	108,277
Large-scale optical
Segment Reporting Information [Line Items]
Net sales									81,127	79,947	78,532
Operating Income (Loss)									21,252	20,993	19,605
Depreciation and Amortization									4,861	4,634	4,607
Capital Expenditures									546	2,792	1,244
Identifiable Assets	58,102				59,348				58,102	59,348	59,824
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales									(22,902)	(23,886)	(18,865)
Corporate and other
Segment Reporting Information [Line Items]
Operating Income (Loss)									(4,237)	(2,759)	(3,717)
Depreciation and Amortization									2,208	2,344	1,661
Capital Expenditures									1,535	2,409	1,481
Identifiable Assets	$ 50,700				$ 113,653				$ 50,700	$ 113,653	$ 110,305