v3.26.1
Marketable Securities, Derivative Financial Instruments, Fair Value Measurements and Notes Payable - Schedule of marketable securities measured at fair value on a recurring basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Marketable Securities:    
Available-for-sale Securities $ 42,916 $ 42,634
Equity Securities [Member]    
Marketable Securities:    
Available-for-sale Securities 4,550 4,512
Simon OP Units [Member]    
Marketable Securities:    
Available-for-sale Securities 37,352 37,068
Corporate Bonds [Member]    
Marketable Securities:    
Available-for-sale Securities 1,014 1,054
Level 1 [Member]    
Marketable Securities:    
Available-for-sale Securities 1,808 1,794
Level 1 [Member] | Equity Securities [Member]    
Marketable Securities:    
Available-for-sale Securities 1,808 1,794
Level 1 [Member] | Simon OP Units [Member]    
Marketable Securities:    
Available-for-sale Securities
Level 1 [Member] | Corporate Bonds [Member]    
Marketable Securities:    
Available-for-sale Securities
Level 2 [Member]    
Marketable Securities:    
Available-for-sale Securities 41,108 40,840
Level 2 [Member] | Equity Securities [Member]    
Marketable Securities:    
Available-for-sale Securities 2,742 2,718
Level 2 [Member] | Simon OP Units [Member]    
Marketable Securities:    
Available-for-sale Securities 37,352 37,068
Level 2 [Member] | Corporate Bonds [Member]    
Marketable Securities:    
Available-for-sale Securities 1,014 1,054
Level 3 [Member]    
Marketable Securities:    
Available-for-sale Securities
Level 3 [Member] | Equity Securities [Member]    
Marketable Securities:    
Available-for-sale Securities
Level 3 [Member] | Simon OP Units [Member]    
Marketable Securities:    
Available-for-sale Securities
Level 3 [Member] | Corporate Bonds [Member]    
Marketable Securities:    
Available-for-sale Securities