Subsequent Events (Details Textual) $ / shares in Units, ft² in Thousands, $ in Thousands					1 Months Ended	9 Months Ended		24 Months Ended
	Oct. 25, 2016 $ / shares	Oct. 15, 2016 USD ($) ft²	Oct. 03, 2016 USD ($) ft²	Jul. 12, 2016 USD ($)	Oct. 31, 2016 shares	Sep. 30, 2016 USD ($) shares	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) shares
Subsequent Event [Line Items]
Proceeds from the sale of common stock				$ 133,000		$ 184,881	$ 101,293
OP Unit redemption (in shares) | shares						613,762
Equity, redemption basis						1
Registration expenditures						$ (6,983)	$ (4,286)
Subsequent Event [Member]
Subsequent Event [Line Items]
Shares sold during the year (shares) | shares					142,000
OP Unit redemption (in shares) | shares					142,000
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						2,202,254		2,746,821
Proceeds from the sale of common stock						$ 45,600		$ 55,500
Registration expenditures						$ (584)		$ (733)
Long Beach, California [Member] | Trader Joe's at the Knolls [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price			$ 29,200
Area of real estate property acquired | ft²			52
Kirkland, Washington [Member] | Bridle Trail Shopping Center [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price		$ 32,800
Area of real estate property acquired | ft²		106