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Net Investment in Sales-type Leases, Ground Lease Receivables and Loans Receivable, net - Related Party (Interest Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases	[1]	$ 57,062	$ 43,031
Cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		36,686	27,183
Non-cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		20,376	15,848
Net Investment in Sales-type Leases
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		39,104	31,530
Net Investment in Sales-type Leases | Cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		24,882	19,825
Net Investment in Sales-type Leases | Non-cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		14,222	11,705
Ground Lease Receivables
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		17,958	11,501
Ground Lease Receivables | Cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		11,804	7,358
Ground Lease Receivables | Non-cash
Lessor, Lease, Description [Line Items]
Interest income from sales-type leases		$ 6,154	$ 4,143
[1] For the three months ended March 31, 2022, the Company recorded $2.1 million of “Interest income from sales-type leases” in its consolidated statements of operations from Ground Leases with iStar Inc. (“iStar”).

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Amount of interest income from net investment in sales-type lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 5
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 6A
-URI https://asc.fasb.org/extlink&oid=126900988&loc=SL77927221-108306

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 25
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123408481&loc=SL77919101-209958

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