Condensed Consolidated and Combined Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES
Net income	$ 7,533	$ 11,587
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	10,611	9,482
Amortization of deferred leasing costs and in-place lease intangibles	1,982	1,630
Accrued straight-line rental revenue	(1,730)	(763)
Amortization of lease incentives and above or below-market rents	461	537
Accrued straight-line ground rent expense	236	273
Bad debt expense	48	155
Noncash stock compensation	720	1,012
Impairment charges	15	533
Noncash interest expense	410	482
Noncash loss on extinguishment of debt		542
Gain on acquisitions		(9,460)
Change in the fair value of derivatives	123	(41)
Income from real estate joint ventures		(210)
Changes in operating assets and liabilities:
Property assets	(1,932)	6,438
Property liabilities	234	(563)
Construction assets	(4,298)	(2,375)
Construction liabilities	6,879	(1,071)
Net cash provided by operating activities	21,292	18,188
INVESTING ACTIVITIES
Development of real estate investments	(77,094)	(24,928)
Tenant and building improvements	(4,622)	(2,452)
Acquisitions of real estate investments, net of cash acquired	(2,754)	(2,106)
Government development grants	300	300
(Increase) decrease in restricted cash	(1,713)	455
Contributions to real estate joint ventures		(81)
Return of capital from real estate joint ventures		511
Leasing costs	(1,524)	(671)
Leasing incentives	(63)	(243)
Net cash used for investing activities	(87,470)	(29,215)
FINANCING ACTIVITIES
Proceeds from sale of common stock	49,566	203,245
Offering costs	(320)	(7,604)
Formation Transactions		(47,221)
Debt issuances, credit facility and construction loan borrowings	92,409	62,700
Debt and credit facility repayments, including principal amortization	(61,494)	(184,606)
Debt issuance costs	(35)	(1,825)
Predecessor distributions, net		(10,709)
Dividends and distributions	(15,729)	(2,578)
Net cash (used for) provided by financing activities	64,397	11,402
Net (decrease) increase in cash and cash equivalents	(1,781)	375
Cash and cash equivalents, beginning of period	18,882	9,400
Cash and cash equivalents, end of period	17,101	9,775
Supplemental cash flow information:
Cash paid for interest	8,967	10,170
Debt assumed in acquisitions of real estate investments	$ 27,100	$ 36,048