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Financial Instruments and Risk Management - Fair Value of the Partnership's Senior Notes (Details) - USD ($) $ in Thousands | Jun. 29, 2024 | Sep. 30, 2023
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Bank Debt and Senior Notes [Abstract] |  |
Fair value of Senior Notes | $ 995,199 | $ 938,939
5.875% Senior Notes due March 1, 2027 [Member] |  |
Bank Debt and Senior Notes [Abstract] |  |
Fair value of Senior Notes | 346,063 | 334,250
5.00% Senior Notes due June 1, 2031 [Member] |  |
Bank Debt and Senior Notes [Abstract] |  |
Fair value of Senior Notes | 585,000 | 541,658
5.50% Green Bonds Due October 1, 2028 through October 1, 2033 [Member] |  |
Bank Debt and Senior Notes [Abstract] |  |
Fair value of Senior Notes | $ 64,136 | $ 63,031

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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