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Note 16 - Interest and Finance Costs
 6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Interest Finance Costs [Text Block]
16.
Interest and Finance Costs:
 
The interest and finance costs in the accompanying consolidated statements of income are as follows:
 
    For the six-month periods ended
June 30,
    2016   2017
Interest expense   $
23,301
     $
27,685
  
Swap effect    
11,489
      
6,459
  
Amortization and write-off of financing costs    
885
      
1,068
  
Bank charges and other financing costs    
1,001
      
126
  
Total   $
36,676
     $
35,338