Segments - Reconciliation of Net Operating Income to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	$ (14,279)	$ (9,904)
Amortization of finance leases	(147)	0
General and administrative expenses	(3,793)	(3,401)
Acquisition, development and other pursuit costs	(27)	(400)
Impairment charges	(158)	0
Interest income	7,226	5,319
Interest expense on finance leases	(229)	0
Equity in income of unconsolidated real estate entities	0	273
Change in fair value of interest rate derivatives	(1,736)	(1,463)
Provision for unrealized credit losses	(377)	0
Other income (expense), net	58	60
Income tax benefit	257	110
Net income	9,135	6,514
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	30,299	21,806
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	(14,279)	(9,904)
Amortization of finance leases	(147)	0
General and administrative expenses	(3,793)	(3,401)
Acquisition, development and other pursuit costs	(27)	(400)
Impairment charges	(158)	0
Interest income	7,226	5,319
Interest expense on indebtedness	(7,959)	(5,886)
Interest expense on finance leases	(229)	0
Equity in income of unconsolidated real estate entities	0	273
Change in fair value of interest rate derivatives	(1,736)	(1,463)
Provision for unrealized credit losses	(377)	0
Other income (expense), net	58	60
Income tax benefit	$ 257	$ 110