Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES
Net income	$ 29,664	$ 18,403
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	11,105	8,950
Amortization of leasing costs and in-place lease intangibles	5,646	1,724
Accrued straight-line rental revenue	(448)	(1,349)
Amortization of leasing incentives and above or below-market rents	(49)	394
Accrued straight-line ground rent expense	132	158
Bad debt expense	95	72
Noncash stock compensation	652	582
Impairment charges	35	23
Noncash interest expense	475	558
Noncash loss on extinguishment of debt	0	407
Gain on real estate dispositions	(26,687)	(13,407)
Change in the fair value of derivatives	2,762	187
Changes in operating assets and liabilities:
Property assets	(2,019)	(2,067)
Property liabilities	(1,543)	810
Construction assets	3,264	(20,040)
Construction liabilities	(4,136)	9,900
Net cash provided by operating activities	18,948	5,305
INVESTING ACTIVITIES
Development of real estate investments	(32,669)	(31,050)
Tenant and building improvements	(2,875)	(2,471)
Acquisitions of real estate investments, net of cash received	(164,978)	(35,372)
Dispositions of real estate investments	92,775	50,613
Notes receivable issuances	(31,486)	0
(Decrease) increase in restricted cash	(179)	1,179
Leasing costs	(1,003)	(1,508)
Leasing incentives	(87)	(1,563)
Contributions to equity method investments	(8,887)	0
Net cash used for investing activities	(149,389)	(20,172)
FINANCING ACTIVITIES
Proceeds from sales of common stock	31,180	3,596
Offering costs	(793)	(203)
Debt issuances, credit facility and construction loan borrowings	185,239	173,994
Debt and credit facility repayments, including principal amortization	(75,700)	(146,378)
Debt issuance costs	(559)	(1,446)
Redemption of operating partnership units	(58)	(79)
Dividends and distributions	(15,873)	(13,144)
Net cash provided by financing activities	123,436	16,340
Net (decrease) increase in cash and cash equivalents	(7,005)	1,473
Cash and cash equivalents, beginning of period	26,989	25,883
Cash and cash equivalents, end of period	$ 19,984	$ 27,356