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Debt - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2023
Jan. 15, 2022
Apr. 27, 2021
Aug. 31, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Debt Instrument [Line Items]                    
Long-term debt           $ 544,351,000   $ 544,351,000    
Net payments made on mortgages payable on real estate               128,232,000 $ 13,105,000  
Loss on extinguishment of collateralized debt obligations and mortgages payable on real estate         $ 600,000 $ 0 $ 489,000 693,000 $ 1,092,000  
VIE, Primary Beneficiary | Multifamily                    
Debt Instrument [Line Items]                    
Net payments made on mortgages payable on real estate       $ 26,000,000 37,000,000     (150,200,000)    
Loss on extinguishment of collateralized debt obligations and mortgages payable on real estate       $ 500,000 $ 600,000     $ 2,000,000    
CME Term, SOFR                    
Debt Instrument [Line Items]                    
Spread on variable interest rate           0.26161%   0.26161%    
5.75% Senior Notes Due 2026 | Senior unsecured notes                    
Debt Instrument [Line Items]                    
Principal value of trust preferred securities     $ 100,000,000              
Interest rate     5.75%              
Debt instrument, percentage of principal issued     100.00%              
Proceeds from issuance of senior unsecured notes, net     $ 96,300,000              
Long-term debt           $ 100,000,000   $ 100,000,000    
Deferred loan fees, net           $ 2,100,000   $ 2,100,000   $ 2,600,000
Debt issuance costs, amortization rate           6.64%   6.64%    
5.75% Senior Notes Due 2026 | Senior unsecured notes | Debt Instrument, Redemption, Period One                    
Debt Instrument [Line Items]                    
Debt instrument, redemption price, percentage     100.00%              
5.75% Senior Notes Due 2026 | Senior unsecured notes | April 30, 2023 - April 29, 2024                    
Debt Instrument [Line Items]                    
Debt instrument, redemption price, percentage 100.00%                  
Debt instrument, redemption price, percentage multiplyer     2.875%              
5.75% Senior Notes Due 2026 | Senior unsecured notes | Between BB+ and B+ Credit Rating                    
Debt Instrument [Line Items]                    
Interest rate increase     0.50%              
5.75% Senior Notes Due 2026 | Senior unsecured notes | B+ or Below Credit Rating                    
Debt Instrument [Line Items]                    
Interest rate increase     0.75%              
6.25% senior convertible notes due 2022 | Convertible notes                    
Debt Instrument [Line Items]                    
Interest rate   6.25%                
Extinguishment of debt, amount   $ 138,000,000