Unconsolidated Affiliates and Noncontrolling Interests (Variable Interest Entities) (Details) - USD ($)	Sep. 30, 2017	Mar. 31, 2016
Ambassador Infrastructure, LLC
Noncontrolling Interest [Line Items]
Investment in Real Estate Joint Ventures and Partnerships	$ 0
Maximum Risk of Loss	$ 11,035,000
Percentage of debt guaranteed	100.00%
Percentage of equity interest in real estate property	65.00%
Shoppes at Eagle Point, LLC
Noncontrolling Interest [Line Items]
Investment in Real Estate Joint Ventures and Partnerships	$ 14,754,000
Maximum Risk of Loss	$ 14,754,000
Percentage of equity interest in real estate property	50.00%
Shoppes at Eagle Point, LLC \| Corporate Joint Venture
Noncontrolling Interest [Line Items]
Percentage of equity interest in real estate property		50.00%
Shoppes at Eagle Point, LLC \| Parent Company
Noncontrolling Interest [Line Items]
Percentage of equity interest in real estate property		50.00%
G&I VIII CBL Triangle LLC
Noncontrolling Interest [Line Items]
Investment in Real Estate Joint Ventures and Partnerships	$ 1,464,000
Maximum Risk of Loss	$ 1,464,000

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- Definition

Real Estate Investment, Maximum Loss

+ References

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- Definition

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

+ 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)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

The book value of investments in real estate joint ventures including 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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