Consolidated Statements Of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Rental income	$ 232,393,000	$ 214,447,000	$ 166,279,000
Interest income from mortgage and other notes	13,805,000	10,206,000	7,013,000
Investment income and other	2,302,000	4,335,000	4,217,000
Revenues	248,500,000	228,988,000	177,509,000
Expenses:
Depreciation	59,565,000	53,163,000	38,078,000
Interest expense	43,108,000	37,629,000	26,372,000
Legal expense	422,000	464,000	209,000
Franchise, excise and other taxes	1,009,000	985,000	605,000
General and administrative	9,773,000	10,519,000	9,107,000
Loan and realty losses (recoveries), net	(15,856,000)	491,000	0
Total operating expenses	129,733,000	102,269,000	74,371,000
Income before equity-method investee, tax benefit (expense), investment and other gains, discontinued operations and noncontrolling interest	118,767,000	126,719,000	103,138,000
Income from equity-method investee	1,214,000	1,767,000	71,000
Income tax benefit (expense) of taxable REIT subsidiary	(749,000)	707,000	(15,000)
Investment and other gains	35,912,000	24,655,000	0
Discontinued operations
Net income	152,716,000	150,314,000	103,052,000
Less: net income attributable to noncontrolling interest	(1,176,000)	(1,452,000)	(1,443,000)
Net income attributable to common stockholders	$ 151,540,000	$ 148,862,000	$ 101,609,000
Weighted average common shares outstanding:
Basic	39,013,412	37,604,594	33,375,966
Diluted	39,155,380	37,644,171	33,416,014
Basic:
Net income per common share attributable to common stockholders	$ 3.88	$ 3.96	$ 3.04
Diluted:
Net income per common share attributable to common stockholders	$ 3.87	$ 3.95	$ 3.04