Derivative Instruments and Hedging Activities - Summary Of Balance Sheet Locations And Related Fair Values Of Outstanding Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivatives in Net Asset Position
Net Assets Recognized in Balance Sheet	$ 275	$ 17,588
Derivatives in Net Liability Position
Net Liabilities Recognized in Balance Sheet	23,978	14,215
Prepayment and other
Derivatives in Net Asset Position
Net Assets Recognized in Balance Sheet	275	17,588
Accrued liabilities
Derivatives in Net Liability Position
Net Liabilities Recognized in Balance Sheet	23,978	12,985
Other long-term liabilities
Derivatives in Net Liability Position
Net Liabilities Recognized in Balance Sheet		1,230
Derivatives designated as hedging instruments:
Derivatives in Net Asset Position
Gross Assets	0	7,526
Gross Liabilities Offset in Balance Sheet	0	(1,784)
Net Assets Recognized in Balance Sheet	0	5,742
Derivatives in Net Liability Position
Gross Liabilities	359	1,230
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	359	1,230
Derivatives designated as hedging instruments: | Commodity contracts
Derivatives in Net Asset Position
Gross Assets	0	7,526
Gross Liabilities Offset in Balance Sheet	0	(1,784)
Net Assets Recognized in Balance Sheet	0	5,742
Derivatives in Net Liability Position
Gross Liabilities	359	1,230
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	359	1,230
Derivatives not designated as hedging instruments:
Derivatives in Net Asset Position
Gross Assets	275	11,846
Gross Liabilities Offset in Balance Sheet	0	0
Net Assets Recognized in Balance Sheet	275	11,846
Derivatives in Net Liability Position
Gross Liabilities	23,619	12,985
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	23,619	12,985
Derivatives not designated as hedging instruments: | NYMEX futures contracts
Derivatives in Net Asset Position
Gross Assets	0	0
Gross Liabilities Offset in Balance Sheet	0	0
Net Assets Recognized in Balance Sheet	0	0
Derivatives in Net Liability Position
Gross Liabilities	418	2,578
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	418	2,578
Derivatives not designated as hedging instruments: | Commodity price swap contracts
Derivatives in Net Asset Position
Gross Assets		7,713
Gross Liabilities Offset in Balance Sheet		0
Net Assets Recognized in Balance Sheet		7,713
Derivatives in Net Liability Position
Gross Liabilities		0
Gross Assets Offset in Balance Sheet		0
Net Liabilities Recognized in Balance Sheet		0
Derivatives not designated as hedging instruments: | Forward gasoline and diesel contracts - long
Derivatives in Net Asset Position
Gross Assets	275	4,133
Gross Liabilities Offset in Balance Sheet	0	0
Net Assets Recognized in Balance Sheet	275	4,133
Derivatives in Net Liability Position
Gross Liabilities	196	3,685
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	196	3,685
Derivatives not designated as hedging instruments: | Foreign currency forward contracts
Derivatives in Net Asset Position
Gross Assets	0	0
Gross Liabilities Offset in Balance Sheet	0	0
Net Assets Recognized in Balance Sheet	0	0
Derivatives in Net Liability Position
Gross Liabilities	23,005	6,722
Gross Assets Offset in Balance Sheet	0	0
Net Liabilities Recognized in Balance Sheet	$ 23,005	$ 6,722