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Impairment and Credit Losses - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Property, Plant and Equipment [Line Items]            
Impairment and credit losses $ (238) $ 89,899   $ 39,934 $ 1,354,514  
Asset impairment charges   83,900     1,200,000  
Credit loss   $ 6,000   16,734 $ 135,700 $ 81,600
Equity method investments, other than temporary impairment     $ 39,700      
Construction in Progress            
Property, Plant and Equipment [Line Items]            
Asset impairment charges       $ 40,600