CONSOLIDATED VARIABLE INTEREST ENTITIES (Details) $ in Thousands		Dec. 31, 2023 USD ($) security		Dec. 31, 2022 USD ($) security		Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of consolidated collateralized loan obligation variable interest entities | security		2		2
Variable Interest Entity [Line Items]
Restricted cash	[1]	$ 15,450		$ 50,524
Accrued interest receivable	[1]	24,233		24,938
Other assets	[1]	98,218		78,339
Total assets		5,512,677	[1]	5,951,173	[1]	$ 5,851,252
Debt obligations, net	[1]	3,783,946		4,245,697
Accrued expenses	[1]	65,144		68,227
Other liabilities	[1]	99,095		71,688
Total liabilities	[1]	3,980,479		4,417,612
Total equity		1,532,198	[1]	1,533,561	[1]	$ 1,513,619	$ 1,548,425
Total liabilities and equity	[1]	5,512,677		5,951,173
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Restricted cash		0		4,902
Mortgage loan receivables held for investment, net, at amortized cost		1,327,722		1,308,654
Accrued interest receivable		9,394		8,313
Other assets		4,469		17,505
Total assets		1,341,585		1,339,374
Debt obligations, net		1,060,719		1,058,462
Accrued expenses		3,555		3,029
Other liabilities		0		65
Total liabilities		1,064,274		1,061,556
Net equity in VIEs (eliminated in consolidation)		277,311		277,818
Total equity		277,311		277,818
Total liabilities and equity		$ 1,341,585		$ 1,339,374

[1] Includes amounts relating to consolidated variable interest entities. Refer to Note 2 and Note 9.