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Investments Accounted for Under the Equity Method (Details) - USD ($)
1 Months Ended 12 Months Ended
Jul. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]          
Carrying value of equity method investments   $ 17,400,000 $ 21,000,000    
Income (loss) from equity method investments   3,500,000 (8,200,000) $ (6,000,000)  
Impairment in equity method investments   $ 0 $ 29,000,000.0 $ 9,800,000  
2016 Investee          
Schedule of Equity Method Investments [Line Items]          
Aggregate price         $ 10,000,000
Equity method investment, gain on disposal $ 24,600,000