INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$ 182,721,000		$ 182,721,000		$ 181,322,000
Assets
Real estate under development	364,360,000		364,360,000		337,353,000
Investments in and advances to unconsolidated affiliates	182,721,000		182,721,000		181,322,000
Total assets	2,372,196,000		2,372,196,000		2,264,957,000
Liabilities and Equity
Other liabilities	19,543,000		19,543,000		18,265,000
Total liabilities and equity	2,372,196,000		2,372,196,000		2,264,957,000
Investments in and advances to unconsolidated affiliates	182,721,000		182,721,000		181,322,000
Company's share of distributions in excess of income from, and investments in, unconsolidated affiliates	(8,491,000)		(8,491,000)		(8,701,000)
Combined and Condensed Statements of Operations
Total revenues	49,511,000	40,808,000	96,196,000	83,097,000
Operating and other expenses	(30,677,000)	(25,945,000)	(62,641,000)	(51,783,000)
Equity in (losses) earnings of unconsolidated affiliates	1,430,000	815,000	4,459,000	3,065,000
Depreciation and amortization	(11,584,000)	(9,599,000)	(23,171,000)	(18,828,000)
Loss on debt extinguishment	(66,000)	0	(269,000)	0
Gain on disposition of property	560,000	4,191,000	560,000	4,191,000
Income from continuing operations	11,308,000	4,242,000	30,423,000	13,797,000
Unconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	21,394,000		21,394,000		63,745,000
Assets
Rental property, net	400,891,000		400,891,000		380,268,000
Real estate under development	38,316,000		38,316,000		5,573,000
Investments in and advances to unconsolidated affiliates	21,394,000		21,394,000		63,745,000
Other assets	53,985,000		53,985,000		66,895,000
Total assets	514,586,000		514,586,000		516,481,000
Liabilities and Equity
Mortgage notes payable	303,987,000		303,987,000		265,982,000
Other liabilities	54,916,000		54,916,000		43,733,000
Partners' equity	155,683,000		155,683,000		206,766,000
Total liabilities and equity	514,586,000		514,586,000		516,481,000
Investments in and advances to unconsolidated affiliates	21,394,000		21,394,000		63,745,000
Combined and Condensed Statements of Operations
Total revenues	12,247,000	10,846,000	24,352,000	21,845,000
Operating and other expenses	(5,503,000)	(4,698,000)	(9,318,000)	(8,979,000)
Interest expense	(2,975,000)	(2,056,000)	(5,500,000)	(4,087,000)
Equity in (losses) earnings of unconsolidated affiliates	0	6,581,000	(328,000)	5,870,000
Depreciation and amortization	(3,475,000)	(2,608,000)	(6,181,000)	(4,688,000)
Loss on debt extinguishment	0	0	(187,000)	0
Gain on disposition of property	239,000	0	239,000	0
Income from continuing operations	533,000	8,065,000	3,077,000	9,961,000
Operating Partnership, as General Partner or Managing Member
Combined and Condensed Statements of Operations
Equity in (losses) earnings of unconsolidated affiliates	1,430,000	815,000	4,459,000	3,065,000
Company's share of net income (loss)	1,528,000	913,000	4,655,000	3,261,000
Amortization of excess investment	(98,000)	(98,000)	(196,000)	(196,000)
Core Portfolio
Schedule of Equity Method Investments [Line Items]
Purchase Price			145,700,000
Combined and Condensed Statements of Operations
Total revenues	30,535,000	27,659,000	60,684,000	54,138,000
Equity in (losses) earnings of unconsolidated affiliates	227,000	(42,000)	323,000	(47,000)
Depreciation and amortization	(8,300,000)	(6,909,000)	(16,633,000)	(13,298,000)
Loss on debt extinguishment	(3,000)		(3,000)
Gain on disposition of property	0	0	0	0
Income from continuing operations	1,763,000	600,000	14,439,000	2,488,000
Core Portfolio | Crossroads
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	49.00%		49.00%
Square Footage of Real Estate Property (in square feet)	311,000		311,000
Core Portfolio | Georgetown Portfolio
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%
Square Footage of Real Estate Property (in square feet)	28,000		28,000
Core Portfolio | Route 202 Shopping Center [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	22.22%		22.22%
Square Footage of Real Estate Property (in square feet)	20,000		20,000
Funds
Schedule of Equity Method Investments [Line Items]
Number of Unaffiliated Partners			2
Combined and Condensed Statements of Operations
Total revenues	13,934,000	9,751,000	26,576,000	22,663,000
Equity in (losses) earnings of unconsolidated affiliates	1,203,000	857,000	4,136,000	3,112,000
Depreciation and amortization	(3,284,000)	(2,690,000)	(6,538,000)	(5,530,000)
Loss on debt extinguishment	(63,000)		(266,000)
Gain on disposition of property	560,000	4,191,000	560,000	4,191,000
Income from continuing operations	4,503,000	244,000	7,048,000	5,013,000
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		63,214,000
Investment Income, Dividend			146,364,000
Assets
Investments in and advances to unconsolidated affiliates	63,214,000		63,214,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	63,214,000		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		12,070,000
Investment Income, Dividend			31,474,000
Assets
Investments in and advances to unconsolidated affiliates	12,070,000		12,070,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	12,070,000		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		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		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		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		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		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		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		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		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		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		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		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		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		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		4,239,000
Equity Method Investment, Dividends or Distributions			16,318,000
Fund IV
Schedule of Equity Method Investments [Line Items]
Purchase Price			26,000,000
Fund IV | Savannah, GA
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	7,100,000		7,100,000
Investments in affiliates subsidiaries associates and joint ventures, loan commitment	45,800,000		45,800,000
Number of properties acquired			18
Purchase Price			26,000,000
Assets
Investments in and advances to unconsolidated affiliates	7,100,000		7,100,000
Liabilities and Equity
Investments in and advances to unconsolidated affiliates	7,100,000		7,100,000
Fund IV | Corporate Joint Venture | Savannah, GA
Schedule of Equity Method Investments [Line Items]
Investments in affiliates subsidiaries associates and joint ventures, loan commitment	$ 21,000,000		$ 21,000,000