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Investments in and Advances to Unconsolidated Affiliates - Schedule of Share of Net Income From Unconsolidated Affiliates (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Equity Method Investments And Joint Ventures [Abstract]    
Income from unconsolidated affiliates $ 35,748 $ 38,749
Non-operating items from unconsolidated affiliates (32,621) (18,165)
Net income from unconsolidated affiliates $ 3,127 $ 20,584