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Capital Stock and Changes in Capital Accounts, textuals (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 6 Months Ended
Jun. 22, 2021
USD ($)
Vote
$ / shares
shares
Feb. 28, 2021
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
shares
Dec. 31, 2020
$ / shares
shares
Class Of Stock [Line Items]          
Cash dividends on preferred stock | $     $ 2,884 $ 2,884  
Payments for Repurchase of Common Stock | $     15,136 11,999  
Proceeds from issuance of stock, net of expenses | $     $ 264    
Series D preferred stock          
Class Of Stock [Line Items]          
Stock Issued During Period Shares New Issues     400    
Preferred Stock          
Class Of Stock [Line Items]          
Preferred Stock, Shares Authorized     25,000,000   25,000,000
Preferred Stock Par Or Stated Value Per Share | $ / shares     $ 0.01   $ 0.01
Preferred Stock | Series A Participating Preferred Stock [Member]          
Class Of Stock [Line Items]          
Preferred Stock, Shares Authorized     1,000,000   1,000,000
Preferred Stock, Shares Issued     0   0
Preferred Stock, Shares Outstanding     0   0
Preferred Stock | Preferred Stock Series B          
Class Of Stock [Line Items]          
Preferred Stock, Shares Authorized     5,000,000   5,000,000
Preferred Stock Par Or Stated Value Per Share | $ / shares     $ 0.01   $ 0.01
Preferred Stock, Shares Issued     2,600,000   2,600,000
Preferred Stock, Shares Outstanding     2,600,000   2,600,000
Shares Issued Price Per Share | $ / shares     $ 25.00   $ 25.00
Preferred Stock Liquidation Preference Per Share | $ / shares     $ 25.00   $ 25.00
Preferred Stock Voting Rights     Holders of series B preferred shares have no voting rights other than the ability, subject to certain exceptions, to elect one director if dividends for six quarterly dividend periods (whether or not consecutive) are in arrears and certain other limited protective voting rights.    
Preferred Stock Dividend Rate Percentage     8.875%    
Preferred Stock Dividend Rate Per Dollar Amount | $ / shares     $ 2.21875    
Cash dividends on preferred stock | $     $ 2,884 $ 2,884  
Preferred Stock, Redemption Price Per Share | $ / shares     $ 25.00    
Preferred Stock | Preferred Stock Series C          
Class Of Stock [Line Items]          
Preferred Stock, Shares Authorized     10,675   10,675
Preferred Stock Par Or Stated Value Per Share | $ / shares     $ 0.01   $ 0.01
Preferred Stock, Shares Issued     10,675   10,675
Preferred Stock, Shares Outstanding     10,675   10,675
Preferred Stock Voting Rights     . The Series C Preferred Stock votes with the common shares of the Company, and each share entitles the holder thereof to 1,000 votes on all matters submitted to a vote of the stockholders of the Company.    
Preferred Stock | Series D preferred stock          
Class Of Stock [Line Items]          
Stock Issued During Period Shares New Issues 400        
Preferred Stock Par Or Stated Value Per Share | $ / shares $ 0.01        
Preferred Stock Voting Rights the Company held by the holder to be equal to the lesser of (i) 36% of the total number of votes entitled to vote on any matter put to shareholders of the Company and (ii) the sum of the holder’s aggregate voting power derived from securities other than the Series D Preferred Stock and 15% of the total number of votes entitled to be cast on matters put to shareholders of the Company.        
Cash dividends on preferred stock | $ $ 0        
Preferred Stock Designated to Class     400   400
Preferred Stock Number Of Voting Rights | Vote 100,000        
Gross purchase price | $ $ 360        
Proceeds from issuance of stock, net of expenses | $ $ 264        
Common Stock          
Class Of Stock [Line Items]          
Stock repurchased and retired, shares   6,000,000 6,000,000 4,118,337  
Treasury Stock Acquired, Average Cost Per Share | $ / shares   $ 2.50      
Payments for Repurchase of Common Stock | $   $ 15,136