INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES - Funds (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2015 USD ($)	Apr. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) partner	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates			$ 162,101		$ 162,101		$ 184,352
Gain on disposition of property of unconsolidated affiliates			6,938	$ 102,855	$ 24,043	$ 102,855
White City
Schedule of Equity Method Investments [Line Items]
Net sales proceeds		$ 96,800
Parkway Crossing
Schedule of Equity Method Investments [Line Items]
Net sales proceeds	$ 27,300
Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Number of unaffiliated partners | partner					2
Gain on disposition of property of unconsolidated affiliates			6,938	$ 102,855	$ 24,043	$ 102,855
Fund III | White City
Schedule of Equity Method Investments [Line Items]
Gain on disposition of property of unconsolidated affiliates		$ 17,100
Fund III | Parkway Crossing
Schedule of Equity Method Investments [Line Items]
Gain on disposition of property of unconsolidated affiliates	$ 6,900
Mervyns I and Mervyns II | Opportunity Funds | KLA/Mervyns LLC
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					48,547
Equity Method Investments			26,058		26,058
Mervyns I | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					5,900
Mervyns II | Opportunity Funds | KLA A Markets LLC
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					81,594
Equity Method Investments			20,717		20,717
Corporate Joint Venture | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Distributions					155,503
Investments in and advances to unconsolidated affiliates			63,216		63,216
KLA/Mervyns LLC Add-On Investments | Mervyns I and Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			7,547		7,547
Distributions					9,272
KLAC Rex Venture LLC | Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			2,701		2,701
Distributions					4,927
KLA A Markets LLC Add-On Investments | Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			2,416		2,416
Distributions					4,864
KA-Shopko LLC | Fund II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			1,110		1,110
Distributions					3,358
Marsh and Add-On Investments | Fund II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			2,667		2,667
Distributions					2,941
Operating Partnership, as General Partner or Managing Member | Mervyns I and Mervyns II | Opportunity Funds | KLA/Mervyns LLC
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					11,801
Equity Method Investments			4,901		4,901
Operating Partnership, as General Partner or Managing Member | Mervyns II | Opportunity Funds | KLA A Markets LLC
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					16,318
Equity Method Investments			4,239		4,239
Operating Partnership, as General Partner or Managing Member | Corporate Joint Venture | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Distributions					33,354
Investments in and advances to unconsolidated affiliates			12,070		12,070
Operating Partnership, as General Partner or Managing Member | KLA/Mervyns LLC Add-On Investments | Mervyns I and Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			1,252		1,252
Distributions					2,017
Operating Partnership, as General Partner or Managing Member | KLAC Rex Venture LLC | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Distributions, equity method investment					1,200
Operating Partnership, as General Partner or Managing Member | KLAC Rex Venture LLC | Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			535		535
Distributions					986
Operating Partnership, as General Partner or Managing Member | KLA A Markets LLC Add-On Investments | Mervyns II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			388		388
Distributions					972
Operating Partnership, as General Partner or Managing Member | KA-Shopko LLC | Fund II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			222		222
Distributions					672
Operating Partnership, as General Partner or Managing Member | Marsh and Add-On Investments | Fund II | Opportunity Funds
Schedule of Equity Method Investments [Line Items]
Invested Capital and Advances, cost method investments			$ 533		533
Distributions					$ 588