Investments in and Advances to Unconsolidated Affiliates - Schedule of Share of Net Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Equity Method Investments And Joint Ventures [Abstract]
Income (loss) from unconsolidated affiliates	$ (25,579)	$ 35,748
Non-operating items from unconsolidated affiliates	(20,836)	(32,621)
Net income from unconsolidated affiliates	$ (46,415)	$ 3,127