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Loans and Investments - Summary of impaired loans (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item
Loans and Investments
UPB	$ 202,585	$ 157,960
Carrying Value	191,756	147,131
Allowance for Credit Losses	$ 93,337	$ 85,386
Wtd. Avg. First Dollar LTV Ratio	2	3
Wtd. Avg. Last Dollar LTV Ratio	96	96
Number of impaired loans (less unearned revenue and other holdbacks and adjustments) by asset class | item	8	7
Land
Loans and Investments
UPB	$ 134,215	$ 134,215
Carrying Value	127,868	127,868
Allowance for Credit Losses	$ 77,869	$ 77,869
Wtd. Avg. First Dollar LTV Ratio	0	0
Wtd. Avg. Last Dollar LTV Ratio	99	99
Retail
Loans and Investments
UPB	$ 22,045	$ 22,045
Carrying Value	17,563	17,563
Allowance for Credit Losses	$ 5,817	$ 5,817
Wtd. Avg. First Dollar LTV Ratio	13	14
Wtd. Avg. Last Dollar LTV Ratio	78	79
Office
Loans and Investments
UPB	$ 44,625
Carrying Value	44,625
Allowance for Credit Losses	$ 7,951
Wtd. Avg. First Dollar LTV Ratio	0
Wtd. Avg. Last Dollar LTV Ratio	100
Commercial
Loans and Investments
UPB	$ 1,700	$ 1,700
Carrying Value	1,700	1,700
Allowance for Credit Losses	$ 1,700	$ 1,700
Wtd. Avg. First Dollar LTV Ratio	63	63
Wtd. Avg. Last Dollar LTV Ratio	63	63

X

- Definition

Carrying value of impaired financing receivables.

+ References

No definition available.

+ Details

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X

- Definition

For an impaired loan, the weighted average loan to value ratio that is calculated by comparing the total of the carrying value of the company's loan and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will absorb a total loss of its position.

+ References

No definition available.

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- Definition

For an impaired loan, the weighted average loan to value ratio that is calculated by comparing the total of the carrying value of the company's loan and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will initially absorb a loss.

+ References

No definition available.

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X

- Definition

The number of impaired loans (less unearned revenue and other holdbacks and adjustments) by asset class.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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X

- Definition

Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

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X

- Definition

Amount at par value of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

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