Segment Reporting - Schedule of Performance Based Segment Reporting Information (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 02, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Interest and related income			$ 415,263	$ 445,940	$ 389,361
Less: interest and related expense	$ 6,300		196,232	172,232	139,747
Net interest income			219,031	273,708	249,614
Revenue from real estate owned			27,984
Total revenue			247,015	273,708	249,614
Management fees - affiliate			39,135	38,960	32,611
Incentive fees - affiliate				7,766	10,219
Equity compensation			8,812	5,670	29,489
General and administrative expenses	$ 1,100		12,591	9,004	3,392
Expenses from real estate owned			32,194
Total expenses			92,732	61,400	75,711
Equity in income from investment in CMTG/CN					40
Realized gain (loss) on sale of investments			(141)	(640)	103
Provision For Loan Losses		$ (6,000)	(9,000)	(6,000)
Gain on foreclosure of real estate owned			1,430
Other income			5,855
Reversal of current expected credit loss			8,962	(6,000)
Total other income (loss)			16,106	(6,640)	143
Segment income (loss)			170,389	205,668	174,046
Total Assets as of December 31, 2021		6,952,543	7,455,271	6,952,543	6,548,121
Loan
Revenue
Interest and related income			415,263	445,940	389,361
Less: interest and related expense			180,589	172,232	139,747
Net interest income			234,674	273,708	249,614
Total revenue			234,674
Realized gain (loss) on sale of investments			(141)	(640)	103
Provision For Loan Losses				(6,000)
Reversal of current expected credit loss			8,962
Total other income (loss)			8,821	(6,640)	103
Segment income (loss)			243,495	267,068	249,717
Total Assets as of December 31, 2021		$ 6,952,543	7,015,804	6,952,543	6,548,121
Other
Revenue
Less: interest and related expense			15,643
Net interest income			(15,643)
Revenue from real estate owned			27,984
Total revenue			12,341
Management fees - affiliate			39,135	38,960	32,611
Incentive fees - affiliate				7,766	10,219
Equity compensation			8,812	5,670	29,489
General and administrative expenses			12,591	9,004	3,392
Expenses from real estate owned			32,194
Total expenses			92,732	61,400	75,711
Equity in income from investment in CMTG/CN					40
Gain on foreclosure of real estate owned			1,430
Other income			5,855
Total other income (loss)			7,285		40
Segment income (loss)			(73,106)	$ (61,400)	$ (75,671)
Total Assets as of December 31, 2021			$ 439,467