Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) (USD $)	3 Months Ended		1 Months Ended		3 Months Ended							3 Months Ended					3 Months Ended							1 Months Ended		3 Months Ended					3 Months Ended													3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Apr. 30, 2014 Subsequent Event [Member] KIF [Member]	Apr. 30, 2013 Expected to Result in Losses [Member] Latin America Portfolio [Member] MEXICO Operating Properties [Member]	Mar. 31, 2013 KimPru and KimPru II [Member] Parent Company [Member]	Mar. 31, 2013 KimPru and KimPru II [Member]	Mar. 31, 2014 KimPru and KimPru II [Member]		Dec. 31, 2013 KimPru and KimPru II [Member]		Mar. 31, 2014 KimPru [Member]	Mar. 31, 2014 KIR [Member]		Dec. 31, 2013 KIR [Member]		Mar. 31, 2014 Other Institutional Programs [Member] Acquired [Member]	Mar. 31, 2014 Other Institutional Programs [Member] Parent Company [Member] Operating Properties [Member]	Mar. 31, 2014 Other Institutional Programs [Member] Operating Properties [Member]	Mar. 31, 2014 Other Institutional Programs [Member]		Dec. 31, 2013 Other Institutional Programs [Member]		Mar. 31, 2014 Latin America Portfolio [Member] Sold [Member] MEXICO Operating Properties [Member]	Apr. 30, 2013 Latin America Portfolio [Member] Parent Company [Member] MEXICO Operating Properties [Member]	Apr. 30, 2013 Latin America Portfolio [Member] MEXICO Operating Properties [Member]	Mar. 31, 2014 Latin America Portfolio [Member] MEXICO Operating Properties [Member]	Mar. 31, 2014 Latin America Portfolio [Member]		Dec. 31, 2013 Latin America Portfolio [Member]		Mar. 31, 2014 Other Joint Venture Programs [Member] Parent Company [Member] Operating Properties [Member]	Mar. 31, 2013 Other Joint Venture Programs [Member] Parent Company [Member]	Mar. 31, 2014 Other Joint Venture Programs [Member] Operating Properties [Member]	Mar. 31, 2013 Other Joint Venture Programs [Member]	Mar. 31, 2014 Other Joint Venture Programs [Member]		Dec. 31, 2013 Other Joint Venture Programs [Member]		Mar. 31, 2014 Kimstone [Member]		Dec. 31, 2013 Kimstone [Member]		Jun. 30, 2013 Kimstone [Member]	Mar. 31, 2013 BIG Shopping Centers [Member] Parent Company [Member]	Mar. 31, 2013 BIG Shopping Centers [Member]	Mar. 31, 2014 BIG Shopping Centers [Member]		Dec. 31, 2013 BIG Shopping Centers [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) [Line Items]
Number of Joint Ventures							4				3
Number of Accounts							4
Sales of Real Estate												$ 5,300,000						$ 11,300,000								$ 106,700,000							$ 10,000,000
Impairment of Real Estate					500,000	3,700,000						800,000																				900,000		1,800,000
Number of Real Estate Properties				3			60	[1],[2]	60	[1],[2]		56	[2],[3]	57	[2],[3]	3			52	[2],[4],[5]	56	[2],[4],[5]	6		9		22	[6]	28	[6]			2		73	[7]	75	[7]	39	[2]	39	[2]				21	[2],[8]	21	[2],[8]
Payments to Acquire Real Estate	95,321,000	64,717,000	408,000,000																93,200,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	3,744,000	23,170,000																	3,700,000
Gains (Losses) on Sales of Investment Real Estate																	100,000	300,000						(2,300,000)	(4,600,000)	28,400,000					300,000		500,000
Equity Method Investment, Ownership Percentage							15.00%	[1],[2]	15.00%	[1],[2]		48.60%	[2],[3]	48.60%	[2],[3]					[2],[4],[5]		[2],[4],[5]						[6]		[6]						[7]		[7]	33.30%	[2]	33.30%	[2]	33.30%			37.90%	[2],[8]	37.90%	[2],[8]
Gains (Losses) on Extinguishment of Debt																																												2,400,000	13,700,000
Business Combination, Consideration Transferred, Liabilities Incurred	112,987,000		38,200,000
Repayments of Debt			$ 118,900,000

[1] This venture represents four separate joint ventures, with four separate accounts managed by Prudential Real Estate Investors ("PREI"), three of these ventures are collectively referred to as KimPru and the remaining venture is referred to as KimPru II.

[2] The Company manages these joint venture investments and, where applicable, earns acquisition fees, leasing commissions, property management fees, asset management fees and construction management fees.

[3] During the three months ended March 31, 2014, KIR sold an operating property for a sales price of $5.3 million. In connection with this transaction, the Company recognized its share of an impairment charge of $0.8 million.

[4] During the three months ended March 31, 2014, the Company acquired three properties from a joint venture in which the Company has a noncontrolling interest for a total sales price of $93.2 million. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. As such, the Company recognized a gain of $3.7 million from the fair value adjustment associated with the Company's original ownership due to a change in control and now consolidates these operating properties.

[5] During the three months ended March 31, 2014, a joint venture in which the Company holds a noncontrolling interest sold an operating property for a sales price of $11.3 million and recognized a gain of $0.3 million. The Company's share of this gain was $0.1 million.

[6] During the three months ended March 31, 2014, the Company sold its noncontrolling interest in six operating properties located throughout Mexico for a sales price of $106.5 million. The Company recognized a gain of $28.4 million, before income taxes, associated with the transaction.

[7] During the three months ended March 31, 2014, a joint venture in which the Company holds a noncontrolling interest sold two operating properties for an aggregate sales price of $10.0 million and recognized an aggregate gain of $0.5 million. The Company's share of this gain was $0.3 million.

[8] Ownership % is a blended rate