Mortgage Notes Receivable - Allowance for loan loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance	[1],[2],[3]	$ 10,394
Adoption of ASU 2016-13		41,492	[4],[5],[6]	$ 10,394	[1],[2],[3]
Allowance for Credit Loss, Ending Balance		41,492	[4],[5],[6]	10,394	[1],[2],[3]
Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance	[7]	904		0
Adoption of ASU 2016-13	[7]	1,474		904
Provision for credit losses, net	[7]	570		904
Charge-offs	[7],[8]	0		0
Allowance for Credit Loss, Ending Balance	[7]	1,474		904
Funded And Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		11,298		10,590
Adoption of ASU 2016-13		42,966		11,298
Provision for credit losses, net		38,266		6,179
Charge-offs	[8]	(6,598)		(5,471)
Allowance for Credit Loss, Ending Balance		42,966		11,298
Funded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Credit Loss, Beginning Balance		10,394		10,590
Adoption of ASU 2016-13		41,492		10,394
Provision for credit losses, net		37,696		5,275
Charge-offs	[8]	(6,598)		(5,471)
Allowance for Credit Loss, Ending Balance		$ 41,492		$ 10,394

[1] Includes $0.7 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral. In addition, $0.9 million of the CECL allowance is excluded from this table because it relates to unfunded commitments and has been recorded as a liability under accounts payable and accrued liabilities in our consolidated balance sheet.

[2] Includes $0.7 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral. In addition, $0.9 million of the CECL allowance is excluded from this table because it relates to unfunded commitments and has been recorded as a liability under accounts payable and accrued liabilities in our consolidated balance sheet.

[3] Represents LTV as of origination or latest amendment. LTVs above 65% generally represent loans in contractual default status where we have agreed to extend funds to the borrower above 65% in order to ensure successful completion of the construction and return of capital.

[4] Includes $35.0 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral. In addition, $1.5 million of the CECL allowance is excluded from this table because it relates to unfunded commitments and has been recorded as a liability under accounts payable and accrued liabilities in our consolidated balance sheet.

[5] Represents LTV as of origination or latest amendment. LTVs above 65% generally represent loans in contractual default status where we have agreed to extend funds to the borrower above 65% in order to facilitate successful completion of the construction and return of capital.

[6] Represents the year of either origination or amendment where the loan incurred a full re-underwriting in connection with the amendment.

[7] CECL allowance related to unfunded commitments is presented as a liability under accounts payable and accrued liabilities in our consolidated balance sheet.

[8] Charge-offs result from either loan repayments where the proceeds are less than the principal outstanding or transfers to investment in real property at the time that we take ownership of the property where the fair values of the underlying collateral are less than the principal outstanding.