Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Dec. 01, 2012
Net revenues	$ 222,670	$ 193,554
Cost of goods sold	196,708	172,807
Gross profit	25,962	20,747
Operating expenses:
Selling	4,333	4,961
General and administrative	5,623	5,812
Loss on sale of asset held for sale	0	28
Total operating expenses	9,956	10,801
Operating income	16,006	9,946
Non-operating income	91	614
Income before income taxes	16,097	10,560
Provision for taxes	4,951	3,169
Net income	11,146	7,391
Income per common share:
Basic	$ 0.40	$ 0.26
Diluted	$ 0.40	$ 0.26
Weighted average common shares outstanding:
Basic (in shares)	27,851	28,301
Diluted (in shares)	27,971	28,361
Other comprehensive (loss) income:
Amortization of prior service credit (net of tax of $482 and $442)	(800)	(734)
Amortization of net actuarial loss (net of tax of $99 and $149)	164	253
Unrealized appreciation (depreciation) of investments (net of tax of $91 and $0)	151	(1)
Total other comprehensive loss	(485)	(482)
Comprehensive income	$ 10,661	$ 6,909