Investments - Activity in Real Estate Investments and Intangible Lease Liabilities Held for Sale (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) property
Number of Properties
Beginning balance | property	9	8
Transfers to held for sale classification | property	11	20
Sales | property	(16)	(15)
Transfers to held and used classification | property	0	(4)
Ending balance | property	4	9
Real Estate Investments
Beginning balance	$ 15,434	$ 17,058
Transfers to held for sale classification	28,393	25,767
Sales	(39,047)	(13,501)
Transfers to held and used classification	0	(13,890)
Ending balance	4,780	15,434
Intangible Lease Liabilities
Beginning balance	0	0
Transfers to held for sale classification	0	0
Sales	0	0
Transfers to held and used classification	0	0
Ending balance	0	0
Net Carrying Value
Beginning balance	15,434	17,058
Transfers to held for sale classification	28,393	25,767
Sales	(39,047)	(13,501)
Transfers to held and used classification	0	(13,890)
Ending balance	$ 4,780	$ 15,434