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Debt - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 15, 2022
Apr. 27, 2021
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Debt Instrument [Line Items]                
Long-term debt       $ 544,743,000   $ 544,743,000    
Net (payments made on) proceeds received from mortgages payable on real estate           131,875,000 $ (2,475,000)  
Loss on extinguishment of collateralized debt obligations and mortgages payable on real estate     $ 600,000 1,863,000 $ 0 693,000 $ 603,000  
VIE, Primary Beneficiary | Multi-Family Apartment Properties                
Debt Instrument [Line Items]                
Net (payments made on) proceeds received from mortgages payable on real estate     37,000,000 (150,200,000)        
Loss on extinguishment of collateralized debt obligations and mortgages payable on real estate     $ 600,000 1,900,000        
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       $ 2,300,000   $ 2,300,000   $ 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