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Net Investment in Sales-type Leases and Ground Lease Receivables - Joint Venture (Details) $ in Thousands		1 Months Ended		9 Months Ended		16 Months Ended
	Aug. 30, 2024 USD ($) lease	Jan. 31, 2024 USD ($) lease	May 31, 2023 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Aug. 30, 2024 USD ($) lease
Joint venture
Ground Lease acquisition purchase price				$ 103,303	$ 137,490
Carrying value of noncontrolling interest acquired	$ 46,000					$ 46,000
Joint Venture for New Acquisitions of Ground Leases
Joint venture
Joint venture commitments			$ 275,000
Controlling interest in joint venture			55.00%
Percent of Promote fee				15.00%
Internal Rate of Return				9.00%
Promote fee cap percent				1.275
Number of Ground Leases acquired | lease	9					9
Ground Lease acquisition purchase price						$ 170,400
Funded amount of Ground Lease acquisition	$ 101,200					$ 101,200
Sovereign wealth fund | Joint Venture for New Acquisitions of Ground Leases
Joint venture
Joint venture commitments			$ 225,000
Joint venture for new acquisitions of Ground Leases | Sovereign wealth fund
Joint venture
Ownership percentage			45.00%
First five year following acquisition | Joint Venture for New Acquisitions of Ground Leases
Joint venture
Percent of management fee				0.25%
Management fee term				5 years
After five years of acquisition | Joint Venture for New Acquisitions of Ground Leases
Joint venture
Percent of management fee				0.15%
Sovereign wealth fund
Joint venture
Purchase of joint venture partner share of Ground Leases	$ 48,300
Ground Lease Plus Fund
Joint venture
Number of Ground Leases acquired | lease		1
Ground Lease acquisition purchase price		$ 38,300

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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