Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Rental income	$ 85,115	$ 76,078	$ 70,917
Interest income from mortgage and other notes	7,426	6,652	6,743
Investment income and other	4,412	4,483	4,919
Revenues	96,953	87,213	82,579
Expenses:
Depreciation	16,579	11,549	10,601
Interest expense	3,492	3,848	1,552
Legal expense	766	559	1,152
Franchise, excise and other taxes	771	837	539
General and administrative	7,799	7,588	7,794
Loan and realty losses (recoveries)	2,195	99	573
Total operating expenses	27,212	24,282	21,065
Income before unconsolidated entity, investment and other gains, discontinued operations and noncontrolling interest	69,741	62,931	61,514
Income from unconsolidated entity	45	0	0
Investment and other gains	4,877	10,261	272
Income from continuing operations	74,663	73,192	61,786
Discontinued operations
Income from operations - discontinued	4,269	4,592	5,631
Gain on sales of real estate	11,966	3,348	2,004
Income from discontinued operations	16,235	7,940	7,635
Net income	90,898	81,132	69,421
Less: net income attributable to noncontrolling interest	(167)	0	0
Net income attributable to common stockholders	$ 90,731	$ 81,132	$ 69,421
Weighted average common shares outstanding:
Basic	27,811,813	27,719,096	27,664,482
Diluted	27,838,720	27,792,592	27,732,959
Basic:
Income from continuing operations attributable to common stockholders	$ 2.68	$ 2.64	$ 2.23
Discontinued operations	$ 0.58	$ 0.29	$ 0.28
Net income per common share attributable to common stockholders	$ 3.26	$ 2.93	$ 2.51
Diluted:
Income from continuing operations attributable to common stockholders	$ 2.68	$ 2.63	$ 2.23
Discontinued operations	$ 0.58	$ 0.29	$ 0.27
Net income per common share attributable to common stockholders	$ 3.26	$ 2.92	$ 2.50