Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of commodity derivative activity

Derivatives as of December 31, 2018 consisted of the following (in thousands):

	Gross Amounts		Gross Amounts		Net Amount
	Recognized		Offset		Presented
Assets:
Commodity swaps:
Current portion of derivative assets, related party	$	1,508	$	—	$	1,508
Long-term portion of derivative assets, related party		8,824		—		8,824
Total derivative assets	$	10,332	$	—	$	10,332

Derivatives and embedded derivatives as of as of December 31, 2019 consisted of the following (in thousands):

	Gross Amounts		Gross Amounts		Net Amount
	Recognized		Offset		Presented
Assets:
Commodity swaps:
Long-term portion of derivative assets, related party	$	3,270	$	—	$	3,270
Fueling agreements:
Prepaid expenses and other current assets		232		—		232
Notes receivable and other long-term assets, net		491		—		491
Total derivative assets	$	3,993	$	—	$	3,993
Liabilities:
Commodity swaps:
Current portion of derivative liabilities, related party	$	164	$	—	$	164
Fueling agreements:
Accrued liabilities		42		—		42
Other long-term liabilities		39		—		39
Total derivative liabilities	$	245	$	—	$	245

Schedule of weighted-average price of open commodity swap contract

The following table reflects the weighted-average price of open commodity swap contracts as of December 31, 2018 and 2019, by year with associated volumes:

	December 31, 2018			December 31, 2019
	Volumes	Weighted -Average Price per		Volumes	Weighted -average Price per
Year	(Diesel Gallons)	Diesel Gallon		(Diesel Gallons)	Diesel Gallon
2019	3,125,000	$	3.18	—	$	—
2020	5,000,000	$	3.18	4,986,000	$	2.37
2021	5,000,000	$	3.18	5,000,000	$	2.34
2022	5,000,000	$	3.18	5,000,000	$	2.34
2023	5,000,000	$	3.18	5,000,000	$	2.34
2024	1,875,000	$	3.18	1,870,000	$	1.76