Related Party Transactions - Balances of Transactions (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Cash and restricted cash deposits in affiliated bank	$ 96,113	$ 64,724
Other due to/from affiliate
Accounts receivable	30,894	39,095
Prepaid expenses and other assets	4,374	4,211
Operating lease right-of use assets	18,878	20,617
Other long-term assets	28	57
Accounts payable	3,763	7,250
Unearned income	35,846	35,489
Operating lease liabilities	$ 19,252	$ 20,905