Real Estate Investments and Related Intangibles - Unconsolidated Joint Ventures (Details)	12 Months Ended
Dec. 31, 2019 USD ($) property Joint_Ventures	Dec. 31, 2018 USD ($) property Joint_Ventures	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Unconsolidated Joint Ventures debt outstanding	$ 269,300,000	$ 0
Number of Properties \| property	3,858
Underlying equity in net assets	$ 4,700,000	4,700,000
Cole/Faison JV Bethlehem GA, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	90.00%
Number of Properties \| property	1
Carrying Amount of Investment	$ 40,416,000	35,289,000
Equity in Income	$ 2,364,000	1,219,000	$ 3,068,000
Industrial Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	20.00%
Number of Properties \| property	6
Carrying Amount of Investment	$ 28,409,000	0
Equity in Income	$ 254,000	$ 0	0
Unconsolidated Properties [Member]
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated joint ventures \| Joint_Ventures	1	1
Unconsolidated Property Dispositions, 2018 [Member]
Schedule of Equity Method Investments [Line Items]
Number of disposed properties owned by unconsolidated joint ventures \| property		1
Equity in Income		$ 700,000	$ 200,000

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property.

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- Definition

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

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=119400593&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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Number of Unconsolidated Joint Ventures Disposed of

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Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures, Equity in Income

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