Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUES
Rental revenues and tenant expense reimbursements	$ 221,930	$ 186,884	$ 171,022
Total revenues	221,930	186,884	171,022
COSTS AND EXPENSES
Property operating expenses	56,248	49,096	44,201
Depreciation and amortization	50,687	45,875	44,015
General and administrative	26,964	23,489	23,924
Acquisition costs	172	271	45
Total costs and expenses	134,071	118,731	112,185
OTHER INCOME (EXPENSE)
Interest and other income	822	873	3,815
Interest expense, including amortization	(18,054)	(15,997)	(16,338)
Loss on extinguishment of debt	0	0	(189)
Gain on sales of real estate investments	16,627	26,766	9,391
Total other income (expense)	(605)	11,642	(3,321)
Net income	87,254	79,795	55,516
Allocation to participating securities	(311)	(400)	(351)
Net income available to common stockholders	$ 86,943	$ 79,395	$ 55,165
EARNINGS PER COMMON SHARE - BASIC AND DILUTED:
Net income available to common stockholders - basic (in dollars per share)	$ 1.23	$ 1.17	$ 0.86
Net income available to common stockholders - diluted (in dollars per share)	$ 1.23	$ 1.16	$ 0.85
BASIC WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in shares)	70,534,202	67,762,927	64,428,406
DILUTED WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in shares)	70,793,670	68,170,066	64,722,976