SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Contracts with Customers and Asset Management Fees (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Contracts with Customers
Revenue from contracts with customer	$ 61,621	$ 99,328	$ 191,259	$ 333,543
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Revenues	Revenues	Revenues	Revenues
Loan origination and debt brokerage fees, Net
Contracts with Customers
Revenue from contracts with customer	$ 16,259	$ 40,076	$ 50,982	$ 130,722
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Revenues	Revenues	Revenues	Revenues
Property Sales Broker Fees
Contracts with Customers
Revenue from contracts with customer	$ 16,862	$ 30,308	$ 38,831	$ 100,092
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Revenues	Revenues	Revenues	Revenues
Investment management fees
Contracts with Customers
Revenue from contracts with customer	$ 13,362	$ 16,301	$ 44,844	$ 47,345
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Revenues	Revenues	Revenues	Revenues
Application fees, appraisal revenues, subscription revenues, syndication fees, and other revenues
Contracts with Customers
Revenue from contracts with customer	$ 15,138	$ 12,643	$ 56,602	$ 55,384
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Revenues	Revenues	Revenues	Revenues