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Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 29, 2015 | Aug. 30, 2014 | Aug. 31, 2013
Income Statement [Abstract] |  |  |
Amortization of prior service credit (net of tax of $2,068, $1,944, and $1,791) | $ 2,110 | $ 2,068 | $ 1,944
Amortization of net actuarial loss (net of tax of $337, $361, and $387) | 565 | 337 | 361
(Increase) decrease in actuarial loss (net of tax of $$1,348, $2,177, and $3,894) | 250 | 1,348 | 2,177
Plan amendment (net of tax of $1,364, $1,613, and $1,729) | 1,509 | 1,364 | 1,613
Unrealized appreciation (depreciation) of investments (net of tax of $91, $125, and $189) | $ 0 | $ 91 | $ 125

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- Definition Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 + Details
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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 + Details
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- Definition Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e,f) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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- Definition Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Plan Amendment, Tax + References No definition available. + Details
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