CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Rental income	$ 137,657	$ 133,527	$ 113,080
Interest income from mortgage loans	26,769	27,321	22,119
Interest and other income	3,639	735	1,004
Total revenues	168,065	161,583	136,203
Expenses:
Interest expense	29,949	26,442	17,497
Depreciation and amortization	37,610	35,932	29,431
Impairment charges	1,880	766	2,250
(Recovery) provision for doubtful accounts	(206)	457	619
Transaction costs	56	179	744
General and administrative expenses	17,513	17,412	14,986
Total expenses	86,802	81,188	65,527
Operating income	81,263	80,395	70,676
Income from unconsolidated joint ventures	2,263	1,138	1,819
Gain on sale of real estate, net	3,814	3,582	586
Net income	87,340	85,115	73,081
Income allocated to participating securities	(362)	(385)	(484)
Income allocated to preferred stockholders			(2,454)
Net income available to common stockholders	$ 86,978	$ 84,730	$ 70,143
Earnings per common share:
Basic (in dollars per share)	$ 2.21	$ 2.21	$ 1.97
Diluted (in dollars per share)	$ 2.20	$ 2.21	$ 1.94
Weighted average shares used to calculate earnings per common share:
Basic (in shares)	39,409	38,388	35,590
Diluted (in shares)	39,637	38,597	37,329