Consolidated Statements Of Income (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Rental income	$ 166,279,000	$ 106,029,000	$ 81,482,000
Interest income from mortgage and other notes	7,013,000	7,633,000	7,426,000
Investment income and other	4,217,000	4,166,000	4,409,000
Revenues	177,509,000	117,828,000	93,317,000
Expenses:
Depreciation	38,078,000	20,101,000	14,772,000
Interest expense	26,372,000	9,229,000	3,492,000
Legal expense	209,000	784,000	766,000
Franchise, excise and other taxes	620,000	616,000	771,000
General and administrative	9,107,000	9,254,000	7,799,000
Loan and realty losses (recoveries), net	0	1,976,000	(2,195,000)
Total operating expenses	74,386,000	41,960,000	25,405,000
Income before equity-method investee, discontinued operations and noncontrolling interest	103,123,000	75,868,000	67,912,000
Income from equity-method investee	(71,000)	324,000	45,000
Investment and other gains	0	3,306,000	4,877,000
Income from continuing operations	103,052,000	79,498,000	72,834,000
Discontinued operations
Income from operations - discontinued	0	5,426,000	6,098,000
Gain on sale of real estate	0	22,258,000	11,966,000
Total discontinued operations	0	27,684,000	18,064,000
Net income	103,052,000	107,182,000	90,898,000
Less: net income attributable to noncontrolling interest	(1,443,000)	(999,000)	(167,000)
Net income attributable to common stockholders	$ 101,609,000	$ 106,183,000	$ 90,731,000
Weighted average common shares outstanding:
Basic	33,375,966	28,362,398	27,811,813
Diluted	33,416,014	28,397,702	27,838,720
Basic:
Income from continuing operations attributable to common stockholders	$ 3.04	$ 2.77	$ 2.61
Discontinued operations	$ 0.00	$ 0.97	$ 0.65
Net income per common share attributable to common stockholders	$ 3.04	$ 3.74	$ 3.26
Diluted:
Income from continuing operations attributable to common stockholders	$ 3.04	$ 2.77	$ 2.61
Discontinued operations	$ 0.00	$ 0.97	$ 0.65
Net income per common share attributable to common stockholders	$ 3.04	$ 3.74	$ 3.26