RELATED PARTY TRANSACTIONS - Schedule of Related Party Transactions (Details) - Joint Venture - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Loan processing and administrative services fee income	$ 4,548	$ 3,754	$ 7,878	$ 7,107
Commitment fee income	1,255	0	1,255	0
Fee income from joint ventures	5,803	3,754	9,133	7,107
Loan origination broker fees expense	29,797	$ 22,258	49,926	$ 40,708
Amounts (payable) receivable from joint ventures	$ (7,922)		$ (7,922)		$ 1,855