Real Estate Investments Business Acquisitions (Details) - Real Estate Properties [Domain]						6 Months Ended
		Jun. 02, 2014 USD ($)	Mar. 07, 2014 USD ($) property	Feb. 14, 2014 USD ($)	Jan. 31, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Business Acquisition [Line Items]
Document Period End Date						Jun. 30, 2015
Purchase Price						$ 0	$ 189,386,000
Proceeds from Deposits on Real Estate Sales						4,500,000
Debt Assumed, Net of Premiums							78,049,000
Intangible Assets							14,979,000
Intangible Liabilities							5,892,000
Persimmon Place [Member]
Business Acquisition [Line Items]
Date Purchased					Jan. 31, 2014
Property Name					Persimmon Place
City/State					Dublin, CA
Property Type					Development
Ownership					100.00%
Purchase Price					$ 14,200,000
Debt Assumed, Net of Premiums					0
Intangible Assets					0
Intangible Liabilities					$ 0
Shops at Mira Vista [Member]
Business Acquisition [Line Items]
Date Purchased				Feb. 14, 2014
Property Name				Shops at Mira Vista
City/State				Austin, TX
Property Type				Operating
Ownership				100.00%
Purchase Price				$ 22,500,000
Debt Assumed, Net of Premiums				319,000
Intangible Assets				2,329,000
Intangible Liabilities				$ 291,000
Fairfield Portfolio [Member]
Business Acquisition [Line Items]
Date Purchased	[1]		Mar. 07, 2014
Property Name	[1]		Fairfield Portfolio (1)
City/State	[1]		Fairfield, CT
Property Type	[1]		Operating
Ownership			80.00%
Purchase Price	[1]		$ 149,344,000
Non-controlling interest recorded, fair value			$ 15,400,000
Number of real estate properties acquired | property			3
Debt Assumed, Net of Premiums	[1]		$ 77,730,000
Intangible Assets	[1]		12,650,000
Intangible Liabilities	[1]		$ 5,601,000
Willow Oaks Crossing [Member]
Business Acquisition [Line Items]
Date Purchased	[1]	Jun. 02, 2014
Property Name	[1]	Willow Oaks Crossing
City/State	[1]	Concord, NC
Property Type	[1]	Development
Ownership		100.00%
Purchase Price	[1]	$ 3,342,000
Debt Assumed, Net of Premiums	[1]	0
Intangible Assets	[1]	0
Intangible Liabilities	[1]	$ 0
Partnership Interest [Member]
Business Acquisition [Line Items]
Proceeds from Deposits on Real Estate Sales						(4,500,000)	0
Non-controlling interest recorded, fair value						0	15,385,000
Mortgage loans assumed for the acquisition of real estate						$ 0	$ 78,049,000

[1] On March 7, 2014, the Company acquired an 80% controlling interest in the Fairfield Portfolio. As a result of consolidation, the Company recorded the non-controlling interest of approximately $15.4 million at fair value. The portfolio consists of three operating properties located in Fairfield, CT.