Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Mar. 01, 2014	Mar. 02, 2013
Net revenues	$ 228,811	$ 177,166	$ 451,481	$ 370,720
Cost of goods sold	205,966	159,975	402,674	332,782
Gross profit	22,845	17,191	48,807	37,938
Operating expenses:
Selling	4,489	3,831	8,822	8,792
General and administrative	4,949	4,488	10,572	10,300
(Gain) loss on sale of real estate	(629)	0	(629)	28
Total operating expenses	8,809	8,319	18,765	19,120
Operating income	14,036	8,872	30,042	18,818
Non-operating (expense) income	(74)	(19)	17	595
Income before income taxes	13,962	8,853	30,059	19,413
Provision for taxes	4,369	2,568	9,320	5,737
Net income	9,593	6,285	20,739	13,676
Income per common share:
Basic	$ 0.35	$ 0.22	$ 0.75	$ 0.49
Diluted	$ 0.35	$ 0.22	$ 0.74	$ 0.48
Weighted average common shares outstanding:
Basic (in shares)	27,595	28,084	27,723	28,196
Diluted (in shares)	27,724	28,191	27,850	28,280
Other comprehensive (loss) income:
Amortization of prior service credit (net of tax of $528, $474, $1,010 and $916)	(876)	(786)	(1,676)	(1,520)
Amortization of net actuarial loss (net of tax of $102, $147, $201 and $296)	168	250	332	503
Plan amendment (net of tax of $1,346, $1,613, $1,346 and $1,613)	2,234	2,676	2,234	2,676
Unrealized (depreciation) appreciation of investments (net of tax of $0, $33, $91 and $33)	0	(55)	151	(56)
Total other comprehensive income	1,526	2,085	1,041	1,603
Comprehensive income	$ 11,119	$ 8,370	$ 21,780	$ 15,279