Derivatives (Tables)

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of derivatives not designated as hedging instruments

	As of September 30, 2021
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Cash collateral balance	Other current assets	$	757
Commodity contracts	Derivative assets	$	12,977	Derivative liabilities	$	2,735

	As of December 31, 2020
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Cash collateral balance	Other current assets	$	520
Commodity contracts	Derivative assets	$	17,149	Derivative liabilities	$	—

Schedule of recognized gains (losses) for derivatives

		Realized Losses
		Three Months Ended September 30,
Type of Instrument	Statements of Operations Location	2021			2020
Commodity contracts	Cost of goods sold	$	(2,894	)	$	(531	)

		Unrealized Gains
		Three Months Ended September 30,
Type of Instrument	Statements of Operations Location	2021		2020
Commodity contracts	Cost of goods sold	$	1,918	$	2,113

		Realized Gains
		Nine Months Ended September 30,
Type of Instrument	Statements of Operations Location	2021		2020
Commodity contracts	Cost of goods sold	$	21,449	$	47

		Unrealized Gains (Losses)
		Nine Months Ended September 30,
Type of Instrument	Statements of Operations Location	2021			2020
Commodity contracts	Cost of goods sold	$	(3,014	)	$	1,535