Subsequent Events (Details Textual) $ / shares in Units, ft² in Thousands, $ in Thousands				1 Months Ended	6 Months Ended		21 Months Ended
	Jul. 27, 2016 $ / shares	Jul. 14, 2016 USD ($) ft²	Jul. 12, 2016 USD ($) shares	Jul. 31, 2016 USD ($) shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) shares	Sep. 30, 2016 USD ($)
Subsequent Event [Line Items]
Proceeds from the sale of common stock					$ 39,964	$ 9,936
OP Unit redemption (in shares) | shares					244,126
Equity, redemption basis					1
Registration expenditures					$ (626)	$ (325)
Subsequent Event
Subsequent Event [Line Items]
Shares sold during the year (shares) | shares				75,000
Proceeds from the sale of common stock			$ 133,100
Repayments of debt			$ 500,000
OP Unit redemption (in shares) | shares				75,000
Equity, redemption basis				1
Dividend declared (usd per share) | $ / shares	$ 0.18
Sales Agreement
Subsequent Event [Line Items]
Shares sold during the year (shares) | shares					1,943,059		2,487,626
Proceeds from the sale of common stock					$ 40,000		$ 49,900
Registration expenditures					$ (524)		$ (673)
Sales Agreement | Subsequent Event
Subsequent Event [Line Items]
Shares sold during the year (shares) | shares				259,195
Proceeds from the sale of common stock				$ 5,600
Registration expenditures				$ (60)
Bouquet Center | Bouquet Center | Subsequent Event
Subsequent Event [Line Items]
Purchase price		$ 12,100
Area of real estate property acquired | ft²		26
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Shares sold during the year (shares) | shares			6,555,000
Unsecured Debt | Senior Notes Due 2026 | Scenario, Forecast | Subsequent Event
Subsequent Event [Line Items]
Agreement to issue unsecured debt								$ 200,000
Interest rate (percentage)								3.95%