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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]  
Future Minimum Volume Purchase Requirements The following provides total annual future minimum volume purchase requirements (in thousands of gallons):

 

2021

 

 

580,096

 

2022

 

 

575,686

 

2023

 

 

430,302

 

2024

 

 

322,177

 

2025

 

 

274,469

 

Thereafter

 

 

1,173,385

 

Total

 

 

3,356,115