v3.26.1
Marketable Securities, Derivative Financial Instruments, Fair Value Measurements and Notes Payable (Tables)
3 Months Ended
Mar. 31, 2026
Marketable Securities Derivative Financial Instruments Fair Value Measurements And Notes Payable [Abstract]  
Schedule of available for sale securities

The following is a summary of the Company’s available for sale securities:

 

   As of March 31, 2026 
   Adjusted
Cost
   Gross
Unrealized
Gains
   Gross
Unrealized
Losses
   Fair
Value
 
Marketable Securities:                
Equity securities:                
Common and Preferred Equity Securities  $4,220   $411   $(81)  $4,550 
Simon OP Units   18,336    19,016    -    37,352 
    22,556    19,427    (81)   41,902 
Debt securities:                    
Corporate Bonds   1,007    7    -    1,014 
                     
Total  $23,563   $19,434   $(81)  $42,916 
   As of December 31, 2025 
   Adjusted
Cost
   Gross
Unrealized
Gains
   Gross
Unrealized
Losses
   Fair
Value
 
Marketable Securities:                
Equity securities:                
Common and Preferred Equity Securities  $4,209   $396   $(93)  $4,512 
Simon OP Units   18,336    18,732    -    37,068 
    22,545    19,128    (93)   41,580 
Debt securities:                    
Corporate Bonds   1,007    47    -    1,054 
                     
Total  $23,552   $19,175   $(93)  $42,634 
Schedule of marketable securities measured at fair value on a recurring basis

Marketable securities, available for sale, and derivative financial instruments measured at fair value on a recurring basis:

 

   Fair Value Measurement Using     
As of March 31, 2026  Level 1   Level 2   Level 3   Total 
Marketable Securities:                
Common and Preferred Equity Securities  $1,808   $2,742   $
-
   $4,550 
Simon OP Units   
-
    37,352    
-
    37,352 
Corporate Bonds   
-
    1,014    
-
    1,014 
                     
Total  $1,808   $41,108   $
-
   $42,916 

 

   Fair Value Measurement Using     
As of December 31, 2025  Level 1   Level 2   Level 3   Total 
Marketable Securities:                
Common and Preferred Equity Securities  $1,794   $2,718   $
-
   $4,512 
Simon OP Units   
-
    37,068    
-
    37,068 
Corporate Bonds   
-
    1,054    
-
    1,054 
                     
Total  $1,794   $40,840   $
-
   $42,634 
Schedule of available-for-sale securities and classified by the contractual maturity date

The following table summarizes the estimated fair value of the Company’s investments in debt securities with stated contractual maturity dates, accounted for as available-for-sale securities and classified by the contractual maturity date of the securities:

 

   As of 
   March 31,
2026
 
Due in 1 year  $- 
Due in 1 year through 5 years   - 
Due in 5 years through 10 years   - 
Due after 10 years   1,014 
Total  $1,014 
Schedule of mortgage debt

The carrying amounts and estimated fair values of the Company’s mortgage debt (amounts in millions) are summarized as follows:

 

   As of March 31, 2026   As of December 31, 2025 
   Carrying Amount   Estimated Fair Value   Carrying Amount   Estimated Fair Value 
Mortgages payable  $222.4   $223.4   $222.6   $224.0