Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at January 1,	$ 1,255,127		$ 1,251,869	$ 1,298,836
Improvements, net of master lease	5,948		3,258	9,706
Impairment of investment property				(4,222)
Real estate sold				(13,053)
Property held for sale				(39,398)
Balance at December 31,	$ 1,261,075	[1],[2]	$ 1,255,127	$ 1,251,869

[1] Reconciliation of real estate owned:

[2] The aggregate cost of real estate owned at December 31, 2021 for federal income tax purposes was $1,393,620.