Accounts Payable, Accrued Expenses and Other Liabilities - Components of Current Portion of Accounts Payable, Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts Payable Accrued Expenses And Other Liabilities Current [Abstract]
Accounts payable and accrued expenses	$ 154,933	$ 189,172
Payroll taxes payable	47,869	45,612
Derivative liability	77,909	25,661
Outside broker payable	60,078	74,280
Credit enhancement deposit	25,000	0
Corporate and other taxes payable	18,217	69,237
Contingent consideration	15,841	13,107
Total	$ 399,847	$ 417,069