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Net Investment in Sales-type Leases, Ground Lease Receivables and Loans Receivable, net - Related Party - Loans receivable (Details) $ in Millions		3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2023 USD ($) item D
Star Holdings
Loans receivable, related party
Principal amount	$ 115.0	$ 115.0
Carrying value	112.2	$ 112.2
Number of quarters of interest paid in kind | item		2
Loan repayment period | D		5
Star Holdings | Maximum
Loans receivable, related party
Principal amount	25.0	$ 25.0
Fixed interest rate		12.00%
Star holding term loan facility
Loans receivable, related party
Fixed interest rate		8.00%
Excess unrestricted cash applied for loan repayment		$ 50.0
Star holding term loan facility | Maximum
Loans receivable, related party
Fixed interest rate		10.00%
Secured term loan facility
Loans receivable, related party
Principal amount	115.0	$ 115.0
Provision for credit losses	$ 2.3	$ 2.3

X

- Definition

The stated interest rate of loan receivable.

+ References

No definition available.

+ Details

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X

- Definition

The number of quarters in which interest can be paid in kind for related party loans receivable.

+ References

No definition available.

+ Details

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X

- Definition

The period within delivery of financial statements in which the loans receivable will be prepaid.

+ References

No definition available.

+ Details

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X

- Definition

The principal amount of loans receivable with related party.

+ References

No definition available.

+ Details

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X

- Definition

The excess amount of unrestricted cash which will be applied for repayment of loan receivable.

+ References

No definition available.

+ Details

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X

- Definition

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(e))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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- References

No definition available.

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X

- Definition

Amount of credit loss expense (reversal of expense) for 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 13
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(11))
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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