Asset Impairments, Other Charges, and Inventory Valuation Provision (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($) item	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Cash Charges
Restructuring charges					$ 6,840,000
Long-lived intangible impairment			$ 0	$ 0	32,300,000
Impaired long-lived assets	$ 465,618,000		$ 415,774,000	$ 443,182,000	465,618,000
Asset impairments and other charges					67,934,000
Inventory valuation provision					13,158,000
LCFS Credits charge	7,000,000				7,046,000
Discontinued Operations, Held-for-sale or Disposed of by Sale | Station Closures
Cash Charges
Inventory held-for-sale	$ 27,200,000				27,200,000
Inventory valuation provision					7,800,000
Employee Severance
Cash Charges
Restructuring charges					2,757,000
Stock-based compensation expense					300,000
Facility Closing
Cash Charges
Long-lived intangible impairment		$ 20,400,000
Other restructuring charges		$ 5,200,000
Facility Closing | Natural Gas Fueling Stations
Cash Charges
Number of natural gas fueling stations, intended closures | item		42
Facility Closing | Natural Gas Fueling Stations | Fair Value, Measurements, Nonrecurring | Level 3
Cash Charges
Impaired long-lived assets		$ 23,300,000
Impaired long-lived assets, fair value		2,900,000
Asset impairments and other charges		$ 20,400,000
Strategic shift in operations
Cash Charges
Inventory valuation provision					$ 5,400,000