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Impairment and Credit Losses - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]      
Impairment and credit losses     $ 1,100,000
Credit loss $ 971 $ 81,600 38,100
Equity method investments, other than temporary impairment     $ 39,700