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Summary of Significant Accounting Policies - Mezzanine Loans and Impairments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Mortgage loans on real estate
Interest rate (as a percent)	7.25%
Loan Term	4 years
Allowance for Doubtful Accounts
Accrued interest receivable	$ 46,000,000
Write-off of accrued interest receivable	0	$ 0	$ 0
Impairments
Impairment of Real Estate	$ 3,422,000	$ 0	$ 3,977,000
Minimum
Mortgage loans on real estate
Interest rate (as a percent)		4.00%
Maximum
Mortgage loans on real estate
Interest rate (as a percent)		8.00%
Loan Term	4 years
Mezzanine Loans | Minimum
Mortgage loans on real estate
Interest rate (as a percent)	7.00%
Loan Term	4 years
Mezzanine Loans | Maximum
Mortgage loans on real estate
Interest rate (as a percent)	12.00%
Loan Term	5 years

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Interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column B
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column B))
-URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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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.

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- Definition

Amount, before allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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Amount of writeoff of accrued interest on financing receivable recognized by reversing interest income.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3D
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267969-210447

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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