Quarterly report pursuant to Section 13 or 15(d)

Mandatorily-Redeemable Preferred Stock (Details)

v3.21.1
Mandatorily-Redeemable Preferred Stock (Details) - USD ($)
 1 Months Ended 3 Months Ended
Feb. 12, 2021
Jan. 13, 2021
Jan. 31, 2021
Aug. 31, 2016
Mar. 31, 2021
Mar. 31, 2020
May 12, 2021
May 07, 2021
Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items]                  
Proceeds from issuance of preferred and common equity         $ 35,868,000 $ 35,589,000      
Redemptions of preferred stock         28,750,000 185,000      
Offering costs         $ (1,447,000) $ (2,523,000)      
Series A Preferred Stock                  
Subsidiary, Sale of Stock [Line Items]                  
Dividend rate (as percent)       6.375%          
Preferred stock, par value (in dollars per share)       $ 0.001 $ 0.001       $ 0.001
Preferred stock, shares issued (in shares)       1,150,000 0       1,150,000
Redemption price (in dollars per share) $ 25.00                
Redemptions of preferred stock $ 28,800,000                
Preferred stock, shares authorized (in shares)         850,000       2,000,000
Series A Preferred Stock | Subsequent Event                  
Subsidiary, Sale of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)               850,000  
Series A Preferred Stock | Preferred Stock                  
Subsidiary, Sale of Stock [Line Items]                  
Average sales price price (in dollars per share)       $ 25.00          
Proceeds from issuance of preferred stock       $ 28,800,000          
Proceeds from issuance of preferred and common equity       27,600,000          
Allowance for credit loss, writeoff         $ 127,000        
Series D Preferred Stock                  
Subsidiary, Sale of Stock [Line Items]                  
Dividend rate (as percent)     5.00%            
Preferred stock, par value (in dollars per share)     $ 0.001   $ 0.001       $ 0.001
Preferred stock, shares issued (in shares)     2,415,000   2,415,000       0
Redemption price (in dollars per share)         $ 25.00        
Preferred stock, shares authorized (in shares)         3,600,000       0
Offering costs       $ (2,100,000)          
Series D Preferred Stock | Subsequent Event                  
Subsidiary, Sale of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)             850,000 3,600,000  
Series D Preferred Stock | Preferred Stock                  
Subsidiary, Sale of Stock [Line Items]                  
Dividend rate (as percent)   5.00%              
Average sales price price (in dollars per share)     $ 25.00            
Proceeds from issuance of preferred stock     $ 60,400,000   $ 61,700,000        
Proceeds from issuance of preferred and common equity     $ 58,300,000            
Series D Preferred Stock | Preferred Stock | Level 1                  
Subsidiary, Sale of Stock [Line Items]                  
Average sales price price (in dollars per share)         $ 25.54