Fair Value Measurements (Schedule of Significant Inputs) (Details)	9 Months Ended
	Sep. 30, 2014
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Entity Credit Risk	0.76%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Entity Credit Risk	12.00%
Office [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	6.00%
Discount Rates	7.00%
Office [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	7.50%
Discount Rates	9.75%
Retail [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	6.00%
Discount Rates	9.00%
Retail [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	10.00%
Discount Rates	12.00%
Hotel [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	6.50%
Hotel [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	7.50%
Hotel [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	8.00%
Multifamily [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	4.40%
Discount Rates	4.90%
Multifamily [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization Rates	6.75%
Discount Rates	9.00%
Loans [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	1.75%
Loans [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	12.00%
Land and condominium units [Member] | Minimum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	8.00%
Land and condominium units [Member] | Maximum [Member] | Income and Market Approach Technique [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rates	12.00%