Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Net revenues	$ 945,163	$ 803,165	$ 581,679
Cost of goods sold	841,166	718,534	537,999
Gross profit	103,997	84,631	43,680
Operating expenses:
Selling	18,293	18,318	16,837
General and administrative	22,424	21,887	17,267
(Gain) loss on sale of real estate	(629)	28	50
Total operating expenses	40,088	40,233	34,154
Operating income	63,909	44,398	9,526
Non-operating income	768	696	581
Income before income taxes	64,677	45,094	10,107
Provision (benefit) for taxes	19,624	13,141	(34,865)
Net income	45,053	31,953	44,972
Income per common share:
Basic (in dollars per share)	$ 1.64	$ 1.14	$ 1.54
Diluted (in dollars per share)	$ 1.64	$ 1.13	$ 1.54
Weighted average common shares outstanding:
Basic (in shares)	27,430	28,075	29,145
Diluted (in shares)	27,545	28,170	29,207
Other comprehensive income (loss):
Amortization of prior service credit (net of tax of $2,068, $1,944, and $1,791)	(3,582)	(3,226)	(2,801)
Amortization of net actuarial loss (net of tax of $337, $361, and $387)	749	1,264	644
(Increase) decrease in actuarial loss (net of tax of $1,348, $2,177, and $3,894)	(2,191)	3,612	(3,630)
Plan amendment (net of tax of $1,364, $1,613, and $1,729)	2,216	2,676	2,869
Unrealized appreciation (depreciation) of investments (net of tax of $91, $125, and $189)	151	209	(314)
Total other comprehensive (loss) income	(2,657)	4,535	(3,232)
Comprehensive income	$ 42,396	$ 36,488	$ 41,740