Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES
Rental revenues and tenant expense reimbursements	$ 171,022	$ 151,657	$ 132,484
Total revenues	171,022	151,657	132,484
COSTS AND EXPENSES
Property operating expenses	44,201
Property operating expenses		39,988	35,874
Depreciation and amortization	44,015	40,816	37,870
General and administrative	23,924	21,503	19,681
Acquisition costs	45	124	10
Total costs and expenses	112,185	102,431	93,435
OTHER INCOME (EXPENSE)
Interest and other income	3,815	3,664	169
Interest expense, including amortization	(16,338)	(18,211)	(16,777)
Loss on extinguishment of debt	(189)	0	0
Gain on sales of real estate investments	9,391	28,610	30,654
Total other income (expense)	(3,321)	14,063	14,046
Net income	55,516	63,289	53,095
Redemption of preferred stock	0	0	(1,767)
Preferred stock dividends	0	0	(1,961)
Net income, net of redemption of preferred stock and preferred stock dividends	55,516	63,289	49,367
Allocation to participating securities	(351)	(401)	(352)
Net income available to common stockholders, net of redemption of preferred stock and preferred stock dividends	$ 55,165	$ 62,888	$ 49,015
EARNINGS PER COMMON SHARE – BASIC AND DILUTED:
Net income available to common stockholders - basic, net of redemption of preferred stock and preferred stock dividends (in dollars per share)	$ 0.86	$ 1.09	$ 0.95
Net income available to common stockholders - diluted, net of redemption of preferred stock and preferred stock dividends (in dollars per share)	$ 0.85	$ 1.09	$ 0.95
Basic Weighted Average Common Shares Outstanding (in shares)	64,428,406	57,486,399	51,357,719
Diluted Weighted Average Common Shares Outstanding (in shares)	64,722,976	57,486,399	51,357,719