Acquisitions of Businesses - Additional Information (Details) - USD ($) $ in Thousands			9 Months Ended
	Dec. 05, 2019	Oct. 30, 2019	Jun. 27, 2020	Jun. 29, 2019
Business Acquisition [Line Items]
Cash paid to acquire business			$ 21,971	$ 18,865
Propane Retailer Headquartered In Georgia [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid	$ 10,400
Cash paid to acquire business			9,572
Propane Retailer Headquartered In Georgia [Member] | Non-compete Agreements [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid	$ 1,250
Propane Retailer Headquartered In California [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid		$ 13,000
Cash paid to acquire business			$ 11,899
Propane Retailer Headquartered In California [Member] | Non-compete Agreements [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid		$ 1,000