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Note 6 - Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Feb. 28, 2015 | Mar. 01, 2014 | Feb. 28, 2015 | Mar. 01, 2014
Compensation and Retirement Disclosure [Abstract] |  |  |  |
Defined Contribution Plan, Cost Recognized | $ 3.8 us-gaap_DefinedContributionPlanCostRecognized | $ 4.1 us-gaap_DefinedContributionPlanCostRecognized | $ 7.9 us-gaap_DefinedContributionPlanCostRecognized | $ 8.2 us-gaap_DefinedContributionPlanCostRecognized
Pension Expense | $ 0.9 us-gaap_PensionExpense | $ 0.6 us-gaap_PensionExpense | $ 1.7 us-gaap_PensionExpense | $ 1.2 us-gaap_PensionExpense

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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