Real Estate Investments (Unconsolidated Joint Ventures) (Details) $ in Thousands, ft² in Millions	Dec. 31, 2015 USD ($) ft² property joint_venture	Dec. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying Amount of Investment	$ 56,824	$ 98,053
Carrying Amount of Investment	52,760
Underlying equity in net assets	$ 10,000
Cole/Mosaic JV South Elgin IL, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	50.00%
Carrying Amount of Investment	$ 6,591
Cole/LBA JV OF Pleasanton CA, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	90.00%
Carrying Amount of Investment	$ 32,947
Cole/Faison JV Bethlehem GA, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	90.00%
Carrying Amount of Investment	$ 13,222
REI segment [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount of Investment	$ 52,800
REI segment [Member] \| Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated joint ventures \| joint_venture	3
Number of properties owned \| property	3
Net rentable area (in square feet) \| ft²	0.9

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Net rentable area for properties owned.

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of Unconsolidated Joint Ventures

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