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Investments in and Acquisitions and Dispositions of Businesses - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 09, 2022	Feb. 17, 2022	Mar. 26, 2022	Dec. 25, 2021	Mar. 26, 2022	Mar. 27, 2021
Business Acquisition [Line Items]
Investment plus direct transaction costs					$ 33,775	$ 6,441
Proceeds from sale of business					$ 850	$ 0
Propane and Propane Retailer [Member]
Business Acquisition [Line Items]
Asset acquired				$ 500
Propane and Propane Retailer [Member]
Business Acquisition [Line Items]
Proceeds from sale of business		$ 850
Gain on sale of assets			$ 363
Suburban Renewables
Business Acquisition [Line Items]
Investment plus direct transaction costs	$ 30,000
Percentage of equity interest	25.00%
Oberon
Business Acquisition [Line Items]
Percentage of equity interest			38.00%		38.00%