Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Mar. 01, 2014	Mar. 02, 2013
Amortization of prior service credit, tax	$ 528	$ 474	$ 1,010	$ 916
Amortization of net actuarial loss, tax	102	147	201	296
Plan amendment, tax	1,346	1,613	1,346	1,613
Unrealized (depreciation) appreciation of investments, tax	$ 0	$ 33	$ 91	$ 33