Related Party Transactions - Balances of Transactions (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Cash and restricted cash deposits in affiliated bank	$ 58,445	$ 64,724
Other due to/from affiliate
Accounts receivable	41,493	39,095
Prepaid expenses and other assets	5,341	4,211
Operating lease right-of use assets	19,751	20,617
Other long-term assets	43	57
Accounts payable	2,007	7,250
Unearned income	36,056	35,489
Operating lease liabilities	$ 20,054	$ 20,905