Loan Portfolio - Summary of Carrying Value and Significant Characteristics of Loans Receivable on Non-accrual Status (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2024		Dec. 31, 2023
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 777,882	[1]	$ 717,738	[2]
Carrying Value Before Specific CECL Reserve		776,393	[1]	715,070	[2]
Specific CECL Reserve		(78,277)	[1]	(72,587)	[2]
Net Carrying Value		698,116	[1]	642,483	[2]
Multifamily | Risk Rating Four | CA
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance	[3]			214,479
Carrying Value Before Specific CECL Reserve	[3]			212,877
Net Carrying Value	[3]			$ 212,877
Interest Recognition Method	[3]			Cost recovery
Interest Recognition as of Date	[3]			Oct. 01, 2023
Multifamily | Risk Rating Four | NV
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		96,529
Carrying Value Before Specific CECL Reserve		96,082
Net Carrying Value		$ 96,082
Interest Recognition Method		Cash Basis
Interest Recognition as of Date		Jan. 01, 2024
Multifamily | Risk Rating Four | AZ
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 50,164
Carrying Value Before Specific CECL Reserve		49,957
Net Carrying Value		$ 49,957
Interest Recognition Method		Cash Basis
Interest Recognition as of Date		Jan. 01, 2024
Multifamily | Risk Rating Four | TX
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 39,279
Carrying Value Before Specific CECL Reserve		39,085
Net Carrying Value		$ 39,085
Interest Recognition Method		Cash Basis
Interest Recognition as of Date		Jan. 01, 2024
Office | Risk Rating Four | CA
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 98,214		$ 98,214
Carrying Value Before Specific CECL Reserve		97,827		97,827
Net Carrying Value		$ 97,827		$ 97,827
Interest Recognition Method		Cost Recovery		Cost recovery
Interest Recognition as of Date		Sep. 01, 2023		Sep. 01, 2023
Office | Risk Rating Five | CA
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 112,442		$ 112,442	[4]
Carrying Value Before Specific CECL Reserve		112,163		112,163	[4]
Specific CECL Reserve		(20,863)		(20,523)	[4]
Net Carrying Value		$ 91,300		$ 91,640	[4]
Interest Recognition Method		Cash Basis		Cash basis	[4]
Interest Recognition as of Date		Apr. 01, 2023		Apr. 01, 2023	[4]
Office | Risk Rating Five | GA
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 71,492		$ 71,492
Carrying Value Before Specific CECL Reserve		71,094		71,094
Specific CECL Reserve		(24,394)		(19,954)
Net Carrying Value		$ 46,700		$ 51,140
Interest Recognition Method		Cost Recovery		Cost recovery
Interest Recognition as of Date		Sep. 01, 2023		Sep. 01, 2023
Land | Risk Rating Four | NY
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 67,000		$ 67,000
Carrying Value Before Specific CECL Reserve		67,000		67,000
Net Carrying Value		$ 67,000		$ 67,000
Interest Recognition Method		Cash Basis		Cash basis
Interest Recognition as of Date		Nov. 01, 2021		Nov. 01, 2021
Land | Risk Rating Five | VA
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 152,236		$ 151,326
Carrying Value Before Specific CECL Reserve		152,236		151,326
Specific CECL Reserve		(32,136)		(31,226)
Net Carrying Value		$ 120,100		$ 120,100
Interest Recognition Method		Cost Recovery		Cost recovery
Interest Recognition as of Date		Jan. 01, 2023		Jan. 01, 2023
Land | Risk Rating Four | NY
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 87,741
Carrying Value Before Specific CECL Reserve		88,166
Net Carrying Value		$ 88,166
Interest Recognition Method		Cash Basis
Interest Recognition as of Date		Apr. 01, 2024
Other | Risk Rating Five | NY
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 886		$ 886
Carrying Value Before Specific CECL Reserve		884		884
Specific CECL Reserve		$ (884)		$ (884)
Interest Recognition Method		Cost Recovery		Cost recovery
Interest Recognition as of Date		Jun. 30, 2023		Jun. 30, 2023
Other | Risk Rating Five | Other
Schedule of Loans Receivable Allowance for Credit Losses [Line Items]
Unpaid Principal Balance		$ 1,899		$ 1,899
Carrying Value Before Specific CECL Reserve		1,899		1,899
Net Carrying Value		$ 1,899		$ 1,899
Interest Recognition Method		Cost Recovery		Cost recovery
Interest Recognition as of Date		Jul. 01, 2020		Jul. 01, 2020

[1] Loans classified as non-accrual represented 10.2% of the total loans receivable held-for-investment at June 30, 2024, based on carrying value net of any specific CECL reserves. Excludes five loans with an aggregate carrying value of $600.7 million that are in maturity default but remain on accrual status as the borrower is either current on interest payments or interest is deemed collectible based on the underlying collateral value. Additionally, as of June 30, 2024, we have two loans with an aggregate carrying value of $479.4 million that are delinquent on interest payments but remains on accrual status as the interest is deemed collectible based on the underlying collateral value.

[2] Loans classified as non-accrual represented 9.2% of the total loans receivable held-for-investment at December 31, 2023, based on carrying value net of any specific CECL reserves. Excludes four loans with an aggregate carrying value of $490.2 million that are in maturity default but remain on accrual status as the borrower is either current on interest payments or interest is deemed collectible based on the underlying collateral value. Additionally, as of December 31, 2023, we have one loan with an aggregate carrying value of $78.4 million that is delinquent on interest payments but remains on accrual status as the interest is deemed collectible based on the underlying collateral value.

[3] This loan was sold in April 2024.

[4] During the year ended December 31, 2023, interest income of $0.3 million was recognized on a cash basis for this loan while on non-accrual status.