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Net Investment in Leases (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Jun. 30, 2021 USD ($) lease	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Net investment in leases [Line Items]
Obligation to acquire the Ground Leases or fund the leasehold improvement allowances if certain construction conditions are not met within a specified time period	$ 0
Number of properties acquired from lessee | lease	2
Purchase price for properties acquired	$ 42,000
Number of ground leases entered into | lease	2
Loan receivable held for sale					$ 43,215
Net investment in leases		$ 28,131			$ 43,215
Noncash interest income from sales-type leases		$ 200
Equity interest		51.90%
Net proceeds from net investment in leases		$ 0	$ 6,575
Ground Lease Plus Fund
Net investment in leases [Line Items]
Equity interest		53.00%
Loans Receivable Held-for-sale
Net investment in leases [Line Items]
Loan receivable held for sale	$ 42,000
Land Parcel One
Net investment in leases [Line Items]
Purchase price for properties acquired	$ 42,000
Number of ground leases classified as sales-type lease | lease	1
Land Parcel One | Maximum
Net investment in leases [Line Items]
Leasehold improvement allowance, Ground Leases	$ 83,000
Land Parcel Two
Net investment in leases [Line Items]
Purchase price for properties acquired	$ 42,000
Number of ground leases accounted for as a financing transaction | lease	1
Land Parcel Two | Maximum
Net investment in leases [Line Items]
Leasehold improvement allowance, Ground Leases	$ 83,000
Land Parcel Two | Loans Receivable Held-for-sale
Net investment in leases [Line Items]
Loan receivable held for sale	$ 42,000
Land Parcel Three
Net investment in leases [Line Items]
Purchase price for properties acquired				$ 36,000
Funding for land purchase commitment		$ 28,200

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