Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Revenues from rental properties	$ 36,336,000	$ 33,560,000	$ 70,986,000	$ 66,847,000
Interest on notes and mortgages receivable	668,000	728,000	1,381,000	1,490,000
Total revenues	37,004,000	34,288,000	72,367,000	68,337,000
Operating expenses:
Property costs	6,391,000	5,643,000	11,326,000	11,138,000
Impairments	507,000	701,000	1,538,000	1,472,000
Environmental	830,000	855,000	1,051,000	1,758,000
General and administrative	4,545,000	3,685,000	8,613,000	7,747,000
Depreciation and amortization	7,325,000	6,151,000	14,422,000	12,250,000
Total operating expenses	19,598,000	17,035,000	36,950,000	34,365,000
Gain (loss) on dispositions of real estate	187,000	427,000	1,056,000	376,000
Operating income	17,593,000	17,680,000	36,473,000	34,348,000
Other income (expense), net	61,000	1,504,000	556,000	1,709,000
Interest expense	(6,681,000)	(5,986,000)	(13,356,000)	(11,932,000)
Net earnings	$ 10,973,000	$ 13,198,000	$ 23,673,000	$ 24,125,000
Basic earnings per common share:
Net earnings	$ 0.26	$ 0.32	$ 0.56	$ 0.58
Diluted earnings per common share:
Net earnings	$ 0.26	$ 0.32	$ 0.56	$ 0.58
Weighted average common shares outstanding:
Basic	41,456	41,024	41,420	40,949
Diluted	41,467	41,049	41,445	40,968