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Debt (Schedule Of Debt) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Nov. 28, 2020 | Aug. 29, 2020
Debt Instrument [Line Items] |  |
Financing arrangements | $ 1,267,000 | $ 194,000
Obligations under finance leases | 3,395,000 | 3,715,000
Less: unamortized debt issuance costs | (732,000) | (843,000)
Total debt, including obligations under finance leases | 490,130,000 | 619,266,000
Less: current portion, including obligations under finance leases | (23,225,000) | (122,248,000)
Total long-term debt, including obligations under finance leases | 466,905,000 | 497,018,000
Financing obligations, current | 1,162,000 | 194,000
Current finance lease liabilities | 1,271,000 | 1,262,000
Revolving Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility | 120,000,000 | 250,000,000
Short-term debt |  | 100,000,000
Committed Bank Facility [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility | $ 100,000,000 |
Maturity date | Apr. 14, 2022 |
Uncommitted Bank Facilities [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility | $ 1,200,000 | 1,200,000
Short-term debt | 1,200,000 | 1,200,000
Senior Notes Series A [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 75,000,000 | 75,000,000
Interest rate | 2.65% |
Maturity date | Jul. 28, 2023 |
Senior Notes Series B [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 100,000,000 | 100,000,000
Interest rate | 2.90% |
Maturity date | Jul. 28, 2026 |
Senior Notes Due June 11, 2025 [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 20,000,000 | 20,000,000
Interest rate | 3.79% |
Maturity date | Jun. 11, 2025 |
Senior notes, Due March 5, 2027 [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 50,000,000 | 50,000,000
Interest rate | 2.60% |
Maturity date | Mar. 05, 2027 |
Senior notes due January 12, 2023 [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 50,000,000 | 50,000,000
Interest rate | 3.04% |
Maturity date | Jan. 12, 2023 |
Series 2018B notes, due June 11, 2021 [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 20,000,000 | 20,000,000
Current maturities of long-term debt | $ 20,000,000 | 20,000,000
Interest rate | 3.42% |
Maturity date | Jun. 11, 2021 |
Series 2019A notes, due March 5, 2024 [Member] | Private Placement Debt [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 50,000,000 | $ 50,000,000
Interest rate | 2.40% |
Maturity date | Mar. 05, 2024 |

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