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Note 4 - Investments in and Advances to Real Estate Joint Ventures - Joint Venture Investments Accounted for Under the Equity Method, Debt Details (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2017	Dec. 31, 2016
Mortgage and notes payable		$ 1,738.7	$ 2,063.0
Kim Pru and Kim Pru II [Member]
Weighted average interest rate		3.34%	3.07%
Weighted average remaining term (Month)	[1]	5 years 180 days	5 years 225 days
Mortgage and notes payable		$ 628.1	$ 647.4
KIR [Member]
Weighted average interest rate		4.62%	4.64%
Weighted average remaining term (Month)	[1]	4 years 57 days	4 years 207 days
Mortgage and notes payable		$ 735.8	$ 746.5
CPP [Member]
Weighted average interest rate		2.55%	2.17%
Weighted average remaining term (Month)	[1]	300 days	1 year 120 days
Mortgage and notes payable		$ 84.9	$ 84.8
Other Joint Venture Programs [Member]
Weighted average interest rate		4.33%	5.40%
Weighted average remaining term (Month)	[1]	2 years 267 days	1 year 342 days
Mortgage and notes payable		$ 289.9	$ 584.3
[1] Average Remaining Term includes extension options.

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The average remaining term of the joint venture investments.

+ References

No definition available.

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Weighted average interest rate of debt outstanding.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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

Reference 3: 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(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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