Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Apr. 01, 2019	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Percentage of tax savings to be paid under tax receivable agreement		75.00%	85.00%
Reduction in tax receivable agreement liability due to amendment	$ 67,200
Decrease in deferred income tax asset due to tax receivable agreement amendment	16,300
Increase in paid-in capital as a result of tax receivable agreement amendment	$ 51,000
Percentage of tax savings to be paid under tax receivable agreement to remaining EMDs and Ziffs		69.00%
Estimated future payments under tax receivable agreement		$ 187,461
Unfunded capital commitments of the Company to funds managed		60,700
Capital commitments by EMDs		32,300
Loss Contingencies [Line Items]
Legal provision		19,100	$ 19,100
Africo Litigation
Loss Contingencies [Line Items]
Legal settlements and provisions		19,100
Amounts claimants requesting		421,800
Value of mining rights submitted by DOJ		$ 151,500