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Note 5 - Investments In and Advances to Real Estate Joint Ventures - Joint Venture Investments Accounted for Under the Equity Method, Debt Details (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
		Sep. 30, 2019	Dec. 31, 2018
Mortgage and notes payable		$ 1,613.2	$ 1,782.6
Prudential Investment Program [Member]
Mortgage and notes payable		$ 539.3	$ 572.6
Weighted average interest rate		3.64%	4.29%
Weighted average remaining term (Month)	[1]	49 months 24 days	49 months
KIR [Member]
Mortgage and notes payable		$ 568.8	$ 651.4
Weighted average interest rate		4.46%	4.43%
Weighted average remaining term (Month)	[1]	30 months 27 days	40 months 12 days
CPP [Member]
Mortgage and notes payable		$ 84.7	$ 84.4
Weighted average interest rate		3.25%	3.85%
Weighted average remaining term (Month)	[1]	45 months	54 months
Other Joint Venture Programs [Member]
Mortgage and notes payable		$ 420.4	$ 474.2
Weighted average interest rate		3.93%	4.26%
Weighted average remaining term (Month)	[1]	83 months 9 days	78 months 18 days
[1] Includes extension options

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The average remaining term of the joint venture investments.

+ References

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+ 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(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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