Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Intangible Assets (Details)

v3.21.4
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 594,185 $ 8,793
Accumulated Amortization 2,062 100
Net 592,123 8,693
Aria Energy LLC    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   252,844
Accumulated Amortization   125,922
Net   126,922
Gas rights agreements | Aria Energy LLC    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   217,285
Accumulated Amortization   102,944
Net   114,341
Operations and maintenance contracts | Aria Energy LLC    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   3,500
Accumulated Amortization   2,475
Net   1,025
Gas sales agreements | Aria Energy LLC    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   32,059
Accumulated Amortization   20,503
Net   11,556
Biogas rights agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 554,745 8,293
Accumulated Amortization 1,560 0
Net 553,185 8,293
Electricity off-take agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 23,400  
Accumulated Amortization 113  
Net 23,287  
Operations and maintenance contracts    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 8,620  
Accumulated Amortization 11  
Net 8,609  
RNG purchase contract    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 6,920  
Accumulated Amortization 199  
Net 6,721  
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 350 350
Accumulated Amortization 125 70
Net 225 280
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 150 150
Accumulated Amortization 54 30
Net $ 96 $ 120