Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Revenues from rental properties	$ 107,035	$ 96,748	$ 96,295
Interest on notes and mortgages receivable	3,698	3,145	3,397
Other revenue			3,126
Total revenues	110,733	99,893	102,818
Operating expenses:
Property costs	23,649	23,768	29,382
Impairments	11,615	12,938	3,677
Environmental	6,222	4,612	12,056
General and administrative	16,930	15,777	20,369
Allowance (recoveries) for uncollectible accounts	1,053	3,408	(10,952)
Depreciation and amortization	16,974	10,549	9,346
Total operating expenses	76,443	71,052	63,878
Operating income	34,290	28,841	38,940
Gains on dispositions of real estate	2,272	1,223
Other income, net	18,301	147	103
Interest expense	(14,493)	(9,806)	(11,667)
Earnings from continuing operations	40,370	20,405	27,376
Discontinued operations:
Loss from operating activities	(3,299)	(5,982)	(2,870)
Gains on dispositions of real estate	339	8,995	45,505
(Loss) earnings from discontinued operations	(2,960)	3,013	42,635
Net earnings	$ 37,410	$ 23,418	$ 70,011
Basic and diluted earnings per common share:
Earnings from continuing operations	$ 1.20	$ 0.60	$ 0.81
(Loss) earnings from discontinued operations	(0.09)	0.09	1.27
Net earnings	$ 1.11	$ 0.69	$ 2.08
Weighted average common shares outstanding:
Basic and diluted	33,420	33,409	33,397