v3.25.4
Mortgages Payable - Outstanding Mortgages Payable (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 23, 2025
Dec. 31, 2025
Dec. 05, 2025
Dec. 31, 2024
Mortgage Loans on Real Estate        
Notes payable   $ 829,451   $ 988,019
Mortgages        
Mortgage Loans on Real Estate        
Notes payable, gross   836,691   996,544
Deferred debt issuance costs, net of accumulated amortization of $5,263 and $7,381, respectively   (7,240)   (8,525)
Deferred debt issuance costs, accumulated amortization   $ 5,263   7,381
Mortgages | 731 Lexington Avenue | Office space        
Mortgage Loans on Real Estate        
Interest rate   5.04%    
Notes payable, gross   $ 400,000   400,000
Mortgages | 731 Lexington Avenue | Retail space        
Mortgage Loans on Real Estate        
Interest rate   4.55%    
Notes payable, gross   $ 167,691   300,000
Rate spread 1.51%      
Paid-in-kind interest   $ 191    
Mortgages | Rego Park II | Retail space        
Mortgage Loans on Real Estate        
Interest rate   5.72%    
Notes payable, gross   $ 175,000 $ 175,000 202,544
Rate spread   2.00%    
Mortgages | Rego Park II | Retail space | Maximum        
Mortgage Loans on Real Estate        
Rate spread   4.50%    
Mortgages | The Alexander apartment tower | Retail space        
Mortgage Loans on Real Estate        
Interest rate   2.63%    
Notes payable, gross   $ 94,000   $ 94,000