Other Assets (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
Other assets	[1]	$ 109,702	$ 143,668
Loan servicing assets, at fair value
Other Assets [Abstract]
Other assets		65,515	89,680
Accounts receivable
Other Assets [Abstract]
Other assets		14,465	19,017
Prepaid expenses
Other Assets [Abstract]
Other assets		13,315	14,862
Other investments
Other Assets [Abstract]
Other assets		8,275	8,242
Deferred financing costs
Other Assets [Abstract]
Other assets		770	1,484
Other
Other Assets [Abstract]
Other assets		7,362	10,383
Loan Servicing Rights
Other Assets [Abstract]
Principal balance of underlying loan servicing rights		$ 12,400,000	$ 14,100,000

[1] Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.