XML 101 R83.htm IDEA: XBRL DOCUMENT v3.22.0.1
Preferred Stock (Details)
 3 Months Ended 12 Months Ended
Apr. 02, 2021
$ / shares
shares
Dec. 04, 2019
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
day
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Class of Stock [Line Items]              
Series Preferred Stock       $ 8,745,000 $ 10,219,000 $ 10,142,000  
Common Stock              
Class of Stock [Line Items]              
Common Shares Issued (in shares) | shares       7,291,000      
Equity Distribution Agreements              
Class of Stock [Line Items]              
Maximum offering price   $ 40,000,000          
Percentage of the gross sales price   2.00%          
Series B Preferred Stock              
Class of Stock [Line Items]              
Initial conversion/redemption price (in dollars per share) | $ / shares       $ 18.70      
Temporary equity conversion rate       1.3372      
Annual preferred stock dividend (in dollars per share) | $ / shares       $ 1.375      
Consecutive trading days | day       45      
Days ending prior to notice of conversion       3 days      
Redemption price (in dollars per share) | $ / shares       $ 25.00      
Redemption percent of liquidation preference       103.00%      
Liquidation preference per share (in dollars per share) | $ / shares       $ 25.00      
Series Preferred Stock       $ 4,747,000 $ 6,919,000 $ 6,842,000  
Preferred Shares Tendered (in shares) | shares       1,953,000      
Series preferred stock, par value (in dollars per share) | $ / shares       $ 0.01 $ 0.01    
Temporary equity, dividend rate (as a percent)       5.50% 5.50% 5.50%  
Series Preferred Stock       $ 65,426,000 $ 106,949,000    
Series B Preferred Stock | Minimum              
Class of Stock [Line Items]              
Percent of conversion price       110.00%      
Series B Preferred Stock | Preferred Stock              
Class of Stock [Line Items]              
Series Preferred Stock shares issued (in shares) | shares       0 23,000 42,000  
Gross proceeds received       $ 0 $ 439,000 $ 809,000  
Commissions       0 7,000 12,000  
Net proceeds       0 $ 432,000 $ 797,000  
Issuance of preferred stock (in shares) | shares         23,000 42,000  
Series Preferred Stock       $ 65,426,000 $ 106,949,000 $ 106,920,000 $ 106,123,000
Series B Preferred Stock | Equity Distribution Agreements              
Class of Stock [Line Items]              
Shares sold (in shares) | shares       65,000      
Proceeds received       $ 1,200,000      
Series E Preferred Stock              
Class of Stock [Line Items]              
Initial conversion/redemption price (in dollars per share) | $ / shares       $ 25.00      
Temporary equity conversion rate       5.69476      
Series preferred stock, par value (in dollars per share) | $ / shares       $ 0.01 $ 0.01    
Sale of temporary equity, offering price (in dollars per share) | $ / shares       $ 25.00      
Period of preferred dividends in arrears (in months)       18 months      
Redemption fee, percent of stated value on the original issue date       8.00%      
Redemption fee, percent of stated value beginning on the first anniversary       5.00%      
Redemption fee, percent of stated value beginning on the third anniversary       0.00%      
Issuance of preferred stock (in shares) | shares       1,709,000      
Net proceeds       $ 38,450,000      
Series Preferred Stock       39,339,000 $ 0    
Adjustments to Series Preferred Stock     $ 0 3,128,000      
Dividends declared on Series Preferred Stock       $ 683,000      
Series E Preferred Stock | Initial Closing Date              
Class of Stock [Line Items]              
Temporary equity, dividend rate (as a percent)       0.0008%      
Series E Preferred Stock | First Anniversary From Initial Closing Date              
Class of Stock [Line Items]              
Temporary equity, dividend rate (as a percent)       0.0775%      
Series E Preferred Stock | Second Anniversary From Initial Closing Date              
Class of Stock [Line Items]              
Temporary equity, dividend rate (as a percent)       0.00075%      
Series E Preferred Stock | Preferred Stock              
Class of Stock [Line Items]              
Issuance of preferred stock (in shares) | shares       1,710,000      
Series Preferred Stock       $ 39,339,000 $ 0 0 0
Series E Preferred Stock | Equity Distribution Agreements              
Class of Stock [Line Items]              
Sale of temporary equity, number of shares authorized in transaction (in shares) | shares 20,000,000            
Sale of temporary equity, offering price (in dollars per share) | $ / shares $ 25.00            
Series E Preferred Stock | Dividend Reinvestment Plan              
Class of Stock [Line Items]              
Sale of temporary equity, number of shares authorized in transaction (in shares) | shares 8,000,000            
Sale of temporary equity, offering price (in dollars per share) | $ / shares $ 25.00            
Series M Preferred Stock              
Class of Stock [Line Items]              
Preferred stock dividend rate (in dollars per share)       0.00082%      
Series preferred stock, par value (in dollars per share) | $ / shares 0.01     $ 0.01 $ 0.01    
Sale of temporary equity, offering price (in dollars per share) | $ / shares $ 25.00     $ 25.00      
Redemption fee, percent of stated value on the original issue date       1.50%      
Redemption fee, percent of stated value beginning on the first anniversary       0.00%      
Issuance of preferred stock (in shares) | shares       29,000      
Net proceeds       $ 704,000      
Series Preferred Stock       715,000 $ 0    
Adjustments to Series Preferred Stock       133,000 0    
Dividends declared on Series Preferred Stock       $ 15,000      
Dividend rate (in dollars per share) | $ / shares       $ 2.05      
Dividend rate increase each year from original issuance (as a percent)       0.10%      
Dividend rate, maximum percentage of stated value       8.70%      
Series M Preferred Stock | Preferred Stock              
Class of Stock [Line Items]              
Issuance of preferred stock (in shares) | shares       29,000      
Series Preferred Stock       $ 715,000 $ 0 $ 0 $ 0
Series M Preferred Stock | Equity Distribution Agreements              
Class of Stock [Line Items]              
Sale of temporary equity, number of shares authorized in transaction (in shares) | shares 20,000,000            
Sale of temporary equity, offering price (in dollars per share) | $ / shares $ 25.00            
Series M Preferred Stock | Dividend Reinvestment Plan              
Class of Stock [Line Items]              
Sale of temporary equity, number of shares authorized in transaction (in shares) | shares 8,000,000            
Sale of temporary equity, offering price (in dollars per share) | $ / shares $ 25.00