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Note 9 - Shareholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
$ / shares
shares
May 31, 2025
USD ($)
Dec. 31, 2017
USD ($)
Common Stock, Shares Authorized (in shares)   500,000,000   500,000,000   500,000,000    
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.01   $ 0.01   $ 0.01    
Common Stock, Shares, Outstanding (in shares)   46,565,171   46,565,171   47,708,587    
Proceeds from Issuance of Common Stock | $       $ 26 $ 27      
Stock Repurchased During Period, Value | $   $ 2,828 $ 144 $ 9,476 $ 148      
Preferred Stock, Shares Authorized (in shares)   100,000,000   100,000,000   100,000,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.01   $ 0.01   $ 0.01    
Preferred Stock, Shares Issued (in shares)   4,800,000   4,800,000   4,800,000    
Preferred Stock, Shares Outstanding (in shares)   4,800,000   4,800,000   4,800,000    
Long-term Incentive Plan Units [Member] | Unit Distribution [Member]                
Capital Units, Outstanding (in shares)   2,399,044   2,399,044        
Series A Redeemable Preferred Stock [Member]                
Stock Issued During Period, Shares, New Issues (in shares) 4,800,000              
Preferred Stock, Shares Authorized (in shares)   100,000,000   100,000,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.01 $ 0.01   $ 0.01        
Preferred Stock, Dividend Rate, Percentage 6.625%              
Proceeds from Issuance of Preferred Stock and Preference Stock | $ $ 115,900              
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares $ 25              
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares $ 1.65625              
Preferred Stock, Convertible, Conversion Ratio 3.701              
Preferred Stock, Shares Issued (in shares)   4,800,000   4,800,000        
Preferred Stock, Shares Outstanding (in shares)   4,800,000   4,800,000        
Payments of Dividends | $       $ 2,000        
Share Repurchase Program Authorized May 2025 [Member]                
Share Repurchase Program, Authorized, Amount | $             $ 25,000  
Stock Repurchased During Period, Shares (in shares)   311,745   1,216,672        
Shares Acquired, Average Cost Per Share (in dollars per share) | $ / shares   $ 9.07   $ 7.79        
Stock Repurchased During Period, Value | $   $ 2,800   $ 9,500        
Share Repurchase Program, Remaining Authorized, Amount | $   $ 6,600   $ 6,600        
Dividend Reinvestment and Stock Purchase Plan (DRSPP) [Member]                
Equity Offering, Maximum Offering Amount | $               $ 50,000
Stock Issued During Period, Shares, New Issues (in shares)   1,555   3,124        
Stock Issued During Period, Weighted Average Price Per Share (in dollars per share) | $ / shares   $ 9.53   $ 8.45        
Proceeds from Issuance of Common Stock | $   $ 15   $ 26        
Equity Offering, Amount Available | $   $ 49,900   $ 49,900