Noncontrolling Interests - Components of Net (Loss) Income Attributable to Noncontrolling Interests (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Net (Loss) Income Attributable to Noncontrolling Interests	$ (36,184)	$ (24,909)	$ 131,630
Group A Units
Noncontrolling Interest [Line Items]
Net (Loss) Income Attributable to Noncontrolling Interests	(36,917)	(25,716)	130,730
Other
Noncontrolling Interest [Line Items]
Net (Loss) Income Attributable to Noncontrolling Interests	$ 733	$ 807	$ 900