Investment in and Acquisition and Disposition of Businesses - Summary of Acquisition and Purchase Price Allocation (Parenthetical) (Details) $ in Thousands	12 Months Ended
	Sep. 26, 2020 USD ($) Business
Georgia and California [Member]
Business Acquisition And Dispositions [Line Items]
Number of propane assets and operations acquired	2
Texas, Florida and West Coast [Member]
Business Acquisition And Dispositions [Line Items]
Business acquisition, cost of acquired, shares issued | $	$ 1,600
Florida and California [Member]
Business Acquisition And Dispositions [Line Items]
Number of propane assets and operations acquired	2