FAIR VALUE MEASUREMENTS AND THE FAIR VALUE OPTION (Schedule of the Funds and Fair Value Option Investments, Significant Inputs) (Details)	12 Months Ended
	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value option, number of investments	2
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk	1.75%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk	12.00%
Multifamily Properties [Member] | Minimum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	5.75%
Fair Value Inputs, Discount Rate	7.50%
Multifamily Properties [Member] | Maximum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	7.00%
Fair Value Inputs, Discount Rate	9.00%
Office [Member] | Minimum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	6.25%
Fair Value Inputs, Discount Rate	7.00%
Office [Member] | Maximum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	7.50%
Fair Value Inputs, Discount Rate	9.75%
Retail [Member] | Minimum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	6.00%
Fair Value Inputs, Discount Rate	9.00%
Retail [Member] | Maximum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Capitalization Rate	10.00%
Fair Value Inputs, Discount Rate	12.00%
Land and condominium units [Member] | Minimum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.00%
Land and condominium units [Member] | Maximum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	12.00%
Loans [Member] | Minimum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	2.00%
Loans [Member] | Maximum [Member] | Income and Market Approach Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	9.30%
Equity Method Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value option, number of investments	2