Segment Information - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment information
Number of reportable segments | segment				3
Total revenues		$ 229,691	$ 210,186	$ 640,393	$ 701,986
Net income (loss)		(9,264)	(21,694)	11,084	(439,279)
Total assets	[1]	10,216,072		10,216,072		$ 9,531,181
Marketing, general and administrative		21,015	22,873	62,360	69,132
Operating Segments | Real Estate Segment
Segment information
Total revenues		183,139	165,428	522,041	591,117
Net income (loss)		(18,326)	(20,385)	(11,745)	(444,904)
Total assets		8,707,930		8,707,930		8,707,147
Operating Segments | SUMMIT Segment
Segment information
Total revenues		36,437	35,069	94,643	83,020
Net income (loss)		(362)	(1,897)	11,202	(1,101)
Total assets		478,288		478,288		464,799
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues		10,115	9,689	23,709	27,849
Net income (loss)		9,424	$ 588	11,627	$ 6,726
Total assets		$ 1,029,854		$ 1,029,854		$ 359,235

[1] (1) The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $104.1 million and $41.2 million of land, $65.4 million and $40.5 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $— million of right of use assets, $3.2 million and $5.4 million of accumulated depreciation, $713.2 million and $— million of real estate loans held by consolidated securitization vehicles, $776.3 million and $676.9 million of other assets included in other line items, $204.3 million and $50.0 million of real estate debt, net, $0.9 million and $0.9 million of accrued interest payable, $— million and $— million of lease liabilities, $603.9 million and $— million of senior obligations of consolidated securitization vehicles and $308.0 million and $306.5 million of other liabilities included in other line items as of September 30, 2024 and December 31, 2023, respectively.