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Investment in Unconsolidated Joint Ventures (Details)		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) property	Jun. 30, 2015 USD ($) property	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) property item	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) property item
Investment in Unconsolidated Joint Ventures
Number of unconsolidated joint ventures | item					5		5
Number of properties owned and operated by each unconsolidated joint venture | property		1	1		1		1
Equity in loss (earnings) of unconsolidated joint ventures			$ 183,000	$ (130,000)	$ 36,000	$ (263,000)
Variable Interest Entities
Payments to acquire interest in joint venture					12,686,000
Investment in unconsolidated joint ventures		$ 11,118,000	$ 11,118,000		$ 11,118,000		$ 4,907,000
Shopko retail stores, Lincoln, Nebraska
Variable Interest Entities
Percentage of equity method investments acquired	50.00%
Payments to acquire interest in joint venture	$ 6,300,000
Retail center located in Manahawkin, New Jersey
Variable Interest Entities
Percentage of equity method investments acquired		50.00%
Payments to acquire interest in joint venture		$ 43,500,000
Debt financed		$ 26,100,000
Annual fixed interest rate (as a percent)		4.00%	4.00%		4.00%
Investment in unconsolidated joint ventures		$ 8,559,000	$ 8,559,000		$ 8,559,000
Company share of acquisition expense			$ 400,000		$ 400,000

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Represents the number of properties owned and operated by each unconsolidated joint venture.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

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