v3.26.1
Assets and Liabilities Measured at Fair Value on a Recurring Basis - Schedule of Unobservable Inputs Related to Level 3 Fair Value Measurements (Details) - Level 3: Significant Unobservable Inputs
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Discount Rate | Real Estate Properties and Joint Ventures | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.068 0.068
Discount Rate | Real Estate Properties and Joint Ventures | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.128 0.110
Discount Rate | Real Estate Properties and Joint Ventures | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.085 0.085
Discount Rate | Real Estate Properties and Joint Ventures | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.065 0.065
Discount Rate | Real Estate Properties and Joint Ventures | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.085 0.081
Discount Rate | Real Estate Properties and Joint Ventures | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.072 0.072
Discount Rate | Real Estate Properties and Joint Ventures | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.065 0.065
Discount Rate | Real Estate Properties and Joint Ventures | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.100 0.093
Discount Rate | Real Estate Properties and Joint Ventures | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.070 0.070
Discount Rate | Real Estate Properties and Joint Ventures | Retail | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.063 0.065
Discount Rate | Real Estate Properties and Joint Ventures | Retail | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.120 0.120
Discount Rate | Real Estate Properties and Joint Ventures | Retail | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.074 0.074
Discount Rate | Real Estate Properties and Joint Ventures | Hotel | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.100 0.100
Discount Rate | Real Estate Operating Business | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.130 0.130
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.055 0.055
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Minimum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.050 0.050
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.095 0.103
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Maximum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.123 0.125
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.069 0.069
Capitalization Rate | Real Estate Properties and Joint Ventures | Office | Weighted Average | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.069 0.069
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.053 0.052
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Minimum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.038 0.038
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.068 0.068
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Maximum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.063 0.063
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.057 0.056
Capitalization Rate | Real Estate Properties and Joint Ventures | Industrial | Weighted Average | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.052 0.052
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.053 0.050
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Minimum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.048 0.048
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.085 0.078
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Maximum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.078 0.070
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.055 0.055
Capitalization Rate | Real Estate Properties and Joint Ventures | Residential | Weighted Average | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.050 0.050
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.053 0.055
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Minimum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.050 0.050
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.095 0.095
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Maximum | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.090 0.090
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.063 0.063
Capitalization Rate | Real Estate Properties and Joint Ventures | Retail | Weighted Average | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.060 0.060
Capitalization Rate | Real Estate Properties and Joint Ventures | Hotel | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.080 0.080
Capitalization Rate | Real Estate Properties and Joint Ventures | Hotel | Income Approach—Direct Capitalization    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.070 0.078
Price per projected unit | Real Estate Properties and Joint Ventures | Land | Minimum | Sales Comparison Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input, amount $ 55.00 $ 55.00
Price per projected unit | Real Estate Properties and Joint Ventures | Land | Maximum | Sales Comparison Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input, amount 142.86 140.00
Price per projected unit | Real Estate Properties and Joint Ventures | Land | Weighted Average | Sales Comparison Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input, amount $ 101.70 $ 101.00
Terminal Growth Rate | Real Estate Operating Business | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 0.114 0.114
Measurement Input, Terminal EBITDA Multiple | Real Estate Operating Business | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 20.0  
Measurement Input, Terminal EBITDA Multiple | Real Estate Operating Business | Market Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input   20.0
EBITDA Multiple | Real Estate Operating Business | Market Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Debt securities, available-for-sale, measurement input 32.0 30.3
Loan to Value Ratio | Loans Receivable, including those with related parties | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.552 0.550
Loan to Value Ratio | Loans Receivable, including those with related parties | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 1.246 0.733
Loan to Value Ratio | Loans Receivable, including those with related parties | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.729 0.636
Loan to Value Ratio | Loans Receivable, including those with related parties | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.516
Loan to Value Ratio | Loans Receivable, including those with related parties | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.688
Loan to Value Ratio | Loans Receivable, including those with related parties | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.559
Loan to Value Ratio | Loans Receivable, including those with related parties | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.582 0.583
Loan to Value Ratio | Loans Receivable, including those with related parties | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.617 0.617
Loan to Value Ratio | Loans Receivable, including those with related parties | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.606 0.606
Loan to Value Ratio | Loans Payable | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.415 0.424
Loan to Value Ratio | Loans Payable | Office | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.415 0.424
Loan to Value Ratio | Loans Payable | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.792 0.800
Loan to Value Ratio | Loans Payable | Office | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.792 0.800
Loan to Value Ratio | Loans Payable | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.663 0.714
Loan to Value Ratio | Loans Payable | Office | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.663 0.714
Loan to Value Ratio | Loans Payable | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.303 0.303
Loan to Value Ratio | Loans Payable | Industrial | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.303 0.303
Loan to Value Ratio | Loans Payable | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.402 0.406
Loan to Value Ratio | Loans Payable | Industrial | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.402 0.406
Loan to Value Ratio | Loans Payable | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.349 0.351
Loan to Value Ratio | Loans Payable | Industrial | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.349 0.351
Loan to Value Ratio | Loans Payable | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.445 0.448
Loan to Value Ratio | Loans Payable | Residential | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.445 0.448
Loan to Value Ratio | Loans Payable | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.729 0.728
Loan to Value Ratio | Loans Payable | Residential | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.729 0.728
Loan to Value Ratio | Loans Payable | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.547 0.563
Loan to Value Ratio | Loans Payable | Residential | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.547 0.563
Loan to Value Ratio | Loans Payable | Retail | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.480 0.487
Loan to Value Ratio | Loans Payable | Retail | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.480 0.487
Loan to Value Ratio | Loans Payable | Retail | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.770 0.754
Loan to Value Ratio | Loans Payable | Retail | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.770 0.754
Loan to Value Ratio | Loans Payable | Retail | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.539 0.539
Loan to Value Ratio | Loans Payable | Retail | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.539 0.539
Equivalency Rate | Loans Receivable, including those with related parties | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.057 0.062
Equivalency Rate | Loans Receivable, including those with related parties | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 1.579 0.093
Equivalency Rate | Loans Receivable, including those with related parties | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.229 0.067
Equivalency Rate | Loans Receivable, including those with related parties | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.053
Equivalency Rate | Loans Receivable, including those with related parties | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.083
Equivalency Rate | Loans Receivable, including those with related parties | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input   0.060
Equivalency Rate | Loans Receivable, including those with related parties | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.065 0.070
Equivalency Rate | Loans Receivable, including those with related parties | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.083 0.083
Equivalency Rate | Loans Receivable, including those with related parties | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans receivable, measurement input 0.070 0.074
Equivalency Rate | Loans Payable | Office | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.057 0.058
Equivalency Rate | Loans Payable | Office | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.068 0.067
Equivalency Rate | Loans Payable | Office | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.066 0.065
Equivalency Rate | Loans Payable | Industrial | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.052 0.054
Equivalency Rate | Loans Payable | Industrial | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.061 0.059
Equivalency Rate | Loans Payable | Industrial | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.057 0.056
Equivalency Rate | Loans Payable | Residential | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.049 0.047
Equivalency Rate | Loans Payable | Residential | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.060 0.060
Equivalency Rate | Loans Payable | Residential | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.053 0.052
Equivalency Rate | Loans Payable | Retail | Minimum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.054 0.055
Equivalency Rate | Loans Payable | Retail | Maximum | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.079 0.073
Equivalency Rate | Loans Payable | Retail | Weighted Average | Income Approach—Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 0.061 0.063
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Office | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.1 1.1
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Office | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.8 1.9
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Office | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.5 1.7
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Industrial | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.1 1.1
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Industrial | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.1 1.1
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Industrial | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.1 1.1
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Residential | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.2 1.2
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Residential | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.5 1.5
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Residential | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.3 1.3
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Retail | Minimum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.2 1.2
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Retail | Maximum | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.7 1.6
Weighted Average Cost of Capital Risk Premium Multiple | Loans Payable | Retail | Weighted Average | Net Present Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 1.3 1.3