Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Revenues from rental properties	$ 25,425	$ 21,591	$ 72,360	$ 72,078
Interest on notes and mortgages receivable	707	726	2,467	2,107
Other revenue (note 2)	3,126		3,126
Total revenues	29,258	22,317	77,953	74,185
Operating expenses:
Rental property expenses	6,385	7,576	20,563	20,375
Impairment charges	538	999	1,364	2,919
Environmental expenses	6,184	165	8,653	201
General and administrative expenses	(4,613)	5,003	851	25,047
Allowance for deferred rent receivable			1,531
Depreciation and amortization expense	2,414	2,734	7,047	8,644
Total operating expenses	10,908	16,477	40,009	57,186
Operating income	18,350	5,840	37,944	16,999
Other income, net	19	211	53	503
Interest expense	(3,074)	(2,896)	(8,966)	(7,071)
Earnings from continuing operations	15,295	3,155	29,031	10,431
Discontinued operations:
Loss from operating activities	(420)	(7,196)	(3,673)	(7,604)
Gains from dispositions of real estate (note 2)	27,002	576	39,608	3,819
Earnings (loss) from discontinued operations	26,582	(6,620)	35,935	(3,785)
Net earnings (loss)	$ 41,877	$ (3,465)	$ 64,966	$ 6,646
Basic and diluted earnings per common share:
Earnings from continuing operations	$ 0.45	$ 0.09	$ 0.86	$ 0.31
Earnings (loss) from discontinued operations	$ 0.80	$ (0.19)	$ 1.08	$ (0.11)
Net earnings (loss)	$ 1.25	$ (0.10)	$ 1.94	$ 0.20
Basic and diluted weighted-average shares outstanding	33,397	33,396	33,397	33,395