Retail and Wholesale Acquisition - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 14, 2020 USD ($) Site	Jan. 15, 2020 USD ($) Tradingday $ / shares	Jul. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Store	Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Number of company operated sites | Store						46
Operating lease, expense				$ 6,036	$ 7,003	$ 19,088	$ 20,475
Retail and Wholesale Acquisition [Member]
Business Acquisition [Line Items]
Aggregate consideration in cash	$ 36,232
Number of newly issued common units value	9,044
Loss on lease termination	$ 7,988
Sellers [Member] | Retail and Wholesale Acquisition [Member] | Asset Purchase Agreement [Member]
Business Acquisition [Line Items]
Number of retail stores operated | Site	169
Number of wholesale fuel distribution | Site	110
Number of third-party wholesale dealer contracts | Site	53
Number of newly leased sites | Site	62
Number of company operated sites | Site	154
Number of commission sites | Site	15
Number of sites under dealer arrangements | Site	107
Aggregate consideration exclusive of inventory and in-store cash		$ 36,000
Aggregate consideration in cash		$ 21,000	$ 4,900
Number of newly issued common units		842,891
Number of newly issued common units value		$ 15,000
Volume weighted average trading price | $ / shares		$ 17.80
Period for calculation of VWAP		20 days
Number of business days prior to execution of agreement | Tradingday		5
Lessee operating lease term of contract		10 years
Operating lease, expense		$ 8,100
Loss on lease termination						8,000
Deferred lease rent income written off						$ 3,100
Indemnification obligation assertion period		18 months
Indemnification obligation aggregate amount		$ 7,200