Segments - Reconciliation of Net Operating Income to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting [Abstract]
Net operating income	$ 38,557		$ 30,898		$ 75,948	$ 61,789
Depreciation and amortization	(18,781)		(17,285)		(37,338)	(35,351)
Amortization of right-of-use assets - finance leases	(277)		(278)		(555)	(467)
General and administrative expenses	(3,617)		(3,487)		(8,325)	(7,508)
Acquisition, development and other pursuit costs	(26)		(32)		(37)	(103)
Impairment charges	(286)		(83)		(333)	(3,122)
Gain on real estate dispositions, net	19,493		0		19,493	3,717
Interest income	3,352		6,746		6,920	10,862
Interest expense	(9,371)		(8,418)		(18,402)	(16,393)
Loss on extinguishment of debt	(618)		0		(776)	0
Change in fair value of derivatives and other	2,548		314		6,730	707
Unrealized credit loss provision	(295)		(388)		(900)	(333)
Other income (expense), net	68		7		297	186
Income tax benefit	20		461		321	480
Net income	$ 30,767	$ 12,276	$ 8,455	$ 6,009	$ 43,043	$ 14,464