Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Rental revenues	$ 116,958	$ 108,737	$ 99,355
Total revenues	193,317	302,771	258,385
Expenses
Rental expenses	27,222	25,422	21,904
Real estate taxes	11,383	10,528	9,629
Depreciation and amortization	39,913	37,321	35,328
General and administrative expenses	11,431	10,435	9,552
Acquisition, development and other pursuit costs	352	648	1,563
Impairment charges	1,619	110	355
Total expenses	165,548	271,054	231,706
Gain on real estate dispositions	4,254	8,087	30,533
Operating income	32,023	39,804	57,212
Interest income	10,729	7,077	3,228
Interest expense	(19,087)	(17,439)	(16,466)
Equity in income of unconsolidated real estate entities	372	0	0
Loss on extinguishment of debt	(11)	(50)	(82)
Change in fair value of interest rate derivatives	(951)	1,127	(941)
Other income	388	131	147
Income before taxes	23,463	30,650	43,098
Income tax benefit (provision)	29	(725)	(343)
Net income	23,492	29,925	42,755
Net income attributable to noncontrolling interests	(6,289)	(8,878)	(14,681)
Net income attributable to stockholders	$ 17,203	$ 21,047	$ 28,074
Net income per share and unit:
Basic and diluted (in dollars per share)	$ 0.36	$ 0.50	$ 0.85
Weighted-average outstanding:
Common shares (in shares)	47,512	42,423	33,057
Common units (in shares)	17,242	17,758	17,167
Basic and diluted (in shares)	64,754	60,181	50,224
Comprehensive income:
Net income	$ 23,492	$ 29,925	$ 42,755
Unrealized cash flow hedge losses	(1,894)	0	0
Realized cash flow hedge losses reclassified to net income	169	0	0
Comprehensive income	21,767	29,925	42,755
Comprehensive income attributable to noncontrolling interests	(5,847)	(8,878)	(14,681)
Comprehensive income attributable to stockholders	15,920	21,047	28,074
General contracting and real estate services revenues
Revenues
General contracting and real estate services revenues	76,359	194,034	159,030
Expenses
General contracting and real estate services expenses	$ 73,628	$ 186,590	$ 153,375