Segments - Reconciliation of Net Operating Income to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	$ 30,891	$ 30,299
Amortization of finance leases	(189)	(147)
General and administrative expenses	(4,021)	(3,793)
Acquisition, development and other pursuit costs	(71)	(27)
Impairment charges	(3,039)	(158)
Gain on real estate dispositions	3,717	0
Interest income	4,116	7,226
Interest expense on indebtedness	(7,613)	(7,959)
Interest expense on finance leases	(362)	(229)
Change in fair value of derivatives and other	393	(1,736)
Unrealized credit loss release (provision)	55	(377)
Other income (expense), net	179	58
Income tax benefit	19	257
Net income	6,009	9,135
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	30,891	30,299
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	(18,066)	(14,279)
Amortization of finance leases	(189)	(147)
General and administrative expenses	(4,021)	(3,793)
Acquisition, development and other pursuit costs	(71)	(27)
Impairment charges	(3,039)	(158)
Gain on real estate dispositions	3,717	0
Interest income	4,116	7,226
Interest expense on indebtedness	(7,613)	(7,959)
Interest expense on finance leases	(362)	(229)
Change in fair value of derivatives and other	393	(1,736)
Unrealized credit loss release (provision)	55	(377)
Other income (expense), net	179	58
Income tax benefit	$ 19	$ 257