Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Rental income	$ 128,486	$ 122,358	$ 256,874	$ 245,001
Interest from financing receivable, net	510		510
Other operating	2,427	1,332	4,378	3,496
Revenues	131,423	123,690	261,762	248,497
Expenses
Property operating	51,509	46,580	103,724	96,134
General and administrative	8,545	7,434	17,044	16,199
Acquisition and pursuit costs	670	431	1,414	1,181
Depreciation and amortization	49,826	47,691	99,905	95,188
Expenses	110,550	102,136	222,087	208,702
Other Income (Expense)
Gain on sales of real estate properties	20,970	68,267	39,860	68,218
Interest expense	(13,261)	(14,442)	(26,523)	(28,402)
Impairment of real estate properties	(5,078)		(5,912)
Equity loss from unconsolidated joint ventures	(146)	(116)	(220)	(127)
Interest and other income (expense), net	(262)	250	238	344
Total other income (expense)	2,223	53,959	7,443	40,033
Net Income	$ 23,096	$ 75,513	$ 47,118	$ 79,828
Basic earnings per common share (in dollars per share)	$ 0.16	$ 0.56	$ 0.33	$ 0.59
Diluted earnings per common share (in dollars per share)	$ 0.16	$ 0.56	$ 0.33	$ 0.59
Weighted average common shares outstanding - basic	141,917,213	133,633,646	140,354,167	133,334,946
Weighted average common shares outstanding - diluted	142,048,988	133,695,912	140,467,777	133,420,312
Revenue, Product and Service [Extensible List]	us-gaap:ServiceMember	us-gaap:ServiceMember