INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$ 178,068,000		$ 181,322,000
Payments to Acquire Equity Method Investments	21,568,000	2,000
Assets
Real estate under development	369,407,000		337,353,000
Investments in and advances to unconsolidated affiliates	178,068,000		181,322,000
Total assets	2,345,862,000		2,264,957,000
Liabilities and Equity
Other liabilities	20,155,000		18,265,000
Total liabilities and equity	2,345,862,000		2,264,957,000
Investments in and advances to unconsolidated affiliates	178,068,000		181,322,000
Company's share of distributions in excess of income from, and investments in, unconsolidated affiliates	(8,670,000)		(8,701,000)
Combined and Condensed Statements of Operations
Total revenues	46,685,000	42,289,000
Operating and other expenses	(31,964,000)	(25,838,000)
Equity in (losses) earnings of unconsolidated affiliates	3,029,000	2,250,000
Depreciation and amortization	(11,587,000)	(9,229,000)
Gain on sale of properties	12,387,000	0
Income from continuing operations	19,115,000	9,555,000
Unconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	21,394,000		63,745,000
Assets
Rental property, net	385,592,000		380,268,000
Real estate under development	30,187,000		5,573,000
Investments in and advances to unconsolidated affiliates	21,394,000		63,745,000
Other assets	67,570,000		66,895,000
Total assets	504,743,000		516,481,000
Liabilities and Equity
Mortgage notes payable	299,210,000		265,982,000
Other liabilities	46,143,000		43,733,000
Partners' equity	159,390,000		206,766,000
Total liabilities and equity	504,743,000		516,481,000
Investments in and advances to unconsolidated affiliates	21,394,000		63,745,000
Combined and Condensed Statements of Operations
Total revenues	12,105,000	10,999,000
Operating and other expenses	(3,815,000)	(4,281,000)
Interest expense	(2,524,000)	(2,031,000)
Equity in (losses) earnings of unconsolidated affiliates	(328,000)	(711,000)
Depreciation and amortization	(2,706,000)	(2,081,000)
Gain on sale of properties	(187,000)	0
Income from continuing operations	2,545,000	1,895,000
Operating Partnership, as General Partner or Managing Member
Combined and Condensed Statements of Operations
Equity in (losses) earnings of unconsolidated affiliates	3,029,000	2,250,000
Company's share of net income (loss)	3,127,000	2,348,000
Amortization of excess investment	(98,000)	(98,000)
Core Portfolio
Schedule of Equity Method Investments [Line Items]
Purchase Price	90,600,000
Combined and Condensed Statements of Operations
Total revenues	30,149,000	26,478,000
Equity in (losses) earnings of unconsolidated affiliates	95,000	(5,000)
Depreciation and amortization	(8,333,000)	(6,389,000)
Income from continuing operations	12,675,000	1,665,000
Core Portfolio | Crossroads
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	49.00%
Square Footage of Real Estate Property (in square feet)	311,000
Core Portfolio | Georgetown Portfolio
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Square Footage of Real Estate Property (in square feet)	28,000
Core Portfolio | Route 202 Shopping Center [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	22.22%
Square Footage of Real Estate Property (in square feet)	20,000
Funds
Schedule of Equity Method Investments [Line Items]
Number of Unaffiliated Partners	2
Combined and Condensed Statements of Operations
Total revenues	12,642,000	12,913,000
Equity in (losses) earnings of unconsolidated affiliates	2,934,000	2,255,000
Depreciation and amortization	(3,254,000)	(2,840,000)
Income from continuing operations	2,546,000	4,992,000
Funds | KLAC Rex Venture LLC
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Dividends or Distributions	1,200,000
Funds | KLAC Rex Venture LLC | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Dividends or Distributions	200,000
Funds | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	63,214,000
Investment Income, Dividend	146,364,000
Assets
Investments in and advances to unconsolidated affiliates	63,214,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	63,214,000
Funds | Corporate Joint Venture | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	12,070,000
Investment Income, Dividend	31,474,000
Assets
Investments in and advances to unconsolidated affiliates	12,070,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	12,070,000
Funds | Mervyns I and Mervyns II | KLA/Mervyns LLC Add-On Investments
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	7,547,000
Investment Income, Dividend	5,935,000
Funds | Mervyns I and Mervyns II | KLA/Mervyns LLC Add-On Investments | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	1,252,000
Investment Income, Dividend	1,321,000
Funds | Mervyns II | KLA A Markets LLC Add-On Investments
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	2,416,000
Investment Income, Dividend	4,864,000
Funds | Mervyns II | KLA A Markets LLC Add-On Investments | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	388,000
Investment Income, Dividend	972,000
Funds | Mervyns II | KLAC Rex Venture LLC
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	2,701,000
Investment Income, Dividend	1,956,000
Funds | Mervyns II | KLAC Rex Venture LLC | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	535,000
Investment Income, Dividend	392,000
Funds | Fund II | KA-Shopko LLC
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	1,108,000
Investment Income, Dividend	2,460,000
Funds | Fund II | KA-Shopko LLC | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	222,000
Investment Income, Dividend	492,000
Funds | Fund II | Marsh and Add-On Investments
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	2,667,000
Investment Income, Dividend	2,639,000
Funds | Fund II | Marsh and Add-On Investments | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	533,000
Investment Income, Dividend	528,000
Funds | KLA/Mervyns LLC | Mervyns I and Mervyns II
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	26,058,000
Equity Method Investment, Dividends or Distributions	46,916,000
Funds | KLA/Mervyns LLC | Mervyns I and Mervyns II | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	4,901,000
Equity Method Investment, Dividends or Distributions	11,451,000
Funds | KLA A Markets LLC | Mervyns II
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	20,717,000
Equity Method Investment, Dividends or Distributions	81,594,000
Funds | KLA A Markets LLC | Mervyns II | Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	4,239,000
Equity Method Investment, Dividends or Distributions	16,318,000
Fund IV
Schedule of Equity Method Investments [Line Items]
Purchase Price	4,900,000
Fund IV | Savannah, GA
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	6,300,000
Investments in affiliates subsidiaries associates and joint ventures, loan commitment	29,400,000
Number of properties acquired	4
Purchase Price	4,900,000
Assets
Investments in and advances to unconsolidated affiliates	6,300,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	6,300,000
Fund IV | Corporate Joint Venture | Savannah, GA
Schedule of Equity Method Investments [Line Items]
Investments in affiliates subsidiaries associates and joint ventures, loan commitment	$ 15,300,000