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Transactions with Related Parties (Details Narrative)
 12 Months Ended
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Related Party Transaction [Line Items]      
Issuance of common stock, value $ 93,848,000 $ 8,623,000  
Management fees charged during the period 18,629,000 18,877,000 $ 18,469,000
Commission charged on charter hire agreements during period 3,512,000 3,673,000 3,629,000
Due From Related Parties, Current 3,447,000 6,012,000  
Due to Related Parties, Current $ 191,000 $ 371,000  
Costamare Shipping Company SA and Costamare Shipping Services Ltd. [member]      
Related Party Transaction [Line Items]      
Issuance of common stock, shares | shares 598,400 598,400  
Portion of annual fee for Company's officers charged during the period $ 2,500,000 $ 2,500,000 1,000,000
Annual fee to Costamare Shipping and Costamare Services $2,500 (in thousands of USD) and 598,400 shares    
Months required for cancellation written notice for management agreement 12    
Management fees calculated on the sale of a vessel 3 months    
Construction supervisory fee $ 787,400    
Commission charged on charter hire agreements 0.75%    
Management agreement date with V-Ships Greece Ltd. Jan. 07, 2013    
Termination fee, description

The termination fee is equal to (a) the number of full years remaining prior to December 31, 2025, times (b) the aggregate fees due and payable to Costamare Shipping or Costamare Services, as applicable, during the 12-month period ending on the date of termination (without taking into account any reduction in fees under the Framework Agreement to reflect that certain obligations have been delegated to a sub-manager or a sub-provider, as applicable); provided that the termination fee will always be at least two times the aggregate fees over the 12-month period described above.

    
Date the Cell commenced April 2013    
Net profit earned pursuant to the Co-operation agreement $ 561,000 718,000 392,000
Working capital security 1,575,000 1,425,000  
Working capital security, per vessel $ 75,000 75,000  
Number of vessels under the Cell 21    
Total charges by the manager to Company's affiliates $ 2,996,000 1,856,000 1,572,000
Management fees charged during the period 19,190,000 19,411,000 18,642,000
Commission charged on charter hire agreements during period 3,512,000 3,673,000 3,629,000
Due From Related Parties, Current 2,841,000 3,728,000  
Due to Related Parties, Current $ 191,000 $ 371,000  
Date of amendement and restatement of group management agreement   Mar. 03, 2015  
Date of new management agreements   Nov. 02, 2015  
Management Fee Per Day Per Vessel 956    
Management Fee Per Day Per Vessel Under Bareboat Charter 478    
Fair Value Of Shares Issued To Manager $ 4,951,000 $ 8,623,000  
Ciel shipmanagement SA [Member]      
Related Party Transaction [Line Items]      
Management fees charged during the period 0 184,000 $ 219,000
Due From Related Parties, Current 606,000 606,000  
Shanghai Costamare Ship Management Co Ltd [Member]      
Related Party Transaction [Line Items]      
Due From Related Parties, Current 0 0  
Due to Related Parties, Current $ 0 $ 0  
Number of vessels managed 15 13