Derivative Instruments and Hedging Activities - Schedule of Weighted-Average Price of Open Commodity Wwap Contracts (Details) - Not Designated as Hedging Instrument	12 Months Ended
	Dec. 31, 2019 $ / gal gal	Dec. 31, 2018 $ / gal gal
Commodity Swap 2019
Derivative [Line Items]
Volumes (Diesel Gallons) | gal		3,125,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal		3.18
Commodity Swap 2020
Derivative [Line Items]
Volumes (Diesel Gallons) | gal	4,986,000	5,000,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal	2.37	3.18
Commodity Swap 2021
Derivative [Line Items]
Volumes (Diesel Gallons) | gal	5,000,000	5,000,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal	2.34	3.18
Commodity Swap 2022
Derivative [Line Items]
Volumes (Diesel Gallons) | gal	5,000,000	5,000,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal	2.34	3.18
Commodity Swap 2023
Derivative [Line Items]
Volumes (Diesel Gallons) | gal	5,000,000	5,000,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal	2.34	3.18
Commodity Swap 2024
Derivative [Line Items]
Volumes (Diesel Gallons) | gal	1,870,000	1,875,000
Weighted -Average Price per Diesel Gallon (in usd per gallon) | $ / gal	1.76	3.18