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Long-term debt-Term loans-Additional Information (Details) $ in Thousands |  | 1 Months Ended | 6 Months Ended | 11 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 14, 2011 USD ($) | Apr. 30, 2014 | Mar. 31, 2014 | Jan. 31, 2014 | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Nov. 19, 2010 USD ($) | Dec. 31, 2014 | Apr. 11, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Jun. 29, 2012 USD ($) | Dec. 31, 2011 USD ($) | Oct. 12, 2011 USD ($) | Oct. 06, 2011 USD ($) | Aug. 26, 2011 USD ($) | Aug. 16, 2011 USD ($) | Apr. 07, 2011 USD ($)
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest costs capitalized |  |  |  |  | $ 0 | $ (1,795) |  |  |  |  |  |  |  |  |  |  |  |
Net Settlements on Interest Rate Swaps Qualifying for Cash Flow Hedge |  |  |  |  |  | 489 |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition construction (three tranches - one for each hull) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity | $ 203,343 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments | 40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal | $ 1,412 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Final Payment of Principal | $ 12,713 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition construction [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | April 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 140,000
Percentage of the vessels contract price available for draw down |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | $ 80,220 | $ 26,740 |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 115,873 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 12 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semi-annual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 4,457 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 62,393 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | July 2015 to January 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessel Cosco Beijing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 90,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | June 2006 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 47,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semiannual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 30,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to August 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessel Cosco Guangzhou [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 90,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | February 2006 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 45,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semiannual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 30,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to February 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessels Maersk Kawasaki Maersk Kure [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | December 2007 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity per vessel |  |  |  |  | $ 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 72,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semiannual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 42,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | December 2015 to December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessel Maersk Kokura [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | January 2008 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 34,750 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semiannual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 4,125 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to February 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessels Msc Romanos (tranche) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 38,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | November 2010 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 24,063 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 17 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 962 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 7,700 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to August 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessels Msc Methoni (tranche b) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 42,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | November 2010 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 27,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 18 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,050 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 8,400 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | July 2015 to October 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessels MSC Ulsan (tranche c) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 21,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | November 2010 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 14,175 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 19 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 525 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 4,200 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to February 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessel Koroni (tranche d) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 7,470 |  |  |  |  |  |  |  |  |  |  |  |  |
Date of loan repayment |  |  |  |  | May 21, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of full debt repayment |  |  |  |  | 4,202 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessel Kyparissia (tranche e) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 7,470 |  |  |  |  |  |  |  |  |  |  |  |  |
Date of loan repayment |  |  |  |  | May 29, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of full debt repayment |  |  |  |  | $ 2,334 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Three hulls - Valor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | August 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | June 3, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 66,213 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,273 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 40,745 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | July 2015 to April 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Three hulls - Valiant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | August 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | August 5, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 66,213 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,273 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 40,745 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | September 2015 to June 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Three hulls - Vantage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | August 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | November 8, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 68,759 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 22 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,273 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 40,744 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to November 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Two S hulls - Value [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | October 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | June 25, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 65,486 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,364 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 38,199 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | September 2015 to June 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Two S hulls - Valence [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | October 2011 |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | September 2, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 66,850 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 21 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 1,364 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 38,199 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | August 2015 to August 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan to partly finance agreegate market value eleven vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 120,000 |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 113,700 |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 79,130 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 39,490 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | September 2015 to December 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense (including swap interest interest capitalized) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense excluding amortization |  |  |  |  | $ 39,702 | 41,008 |  |  |  |  |  |  |  |  |  |  |  |
Interest costs capitalized |  |  |  |  |  | 1,795 |  |  |  |  |  |  |  |  |  |  |  |
Interest capitalized Advances for vessel acquisitions |  |  |  |  |  | (1,306) |  |  |  |  |  |  |  |  |  |  |  |
Net Settlements on Interest Rate Swaps Qualifying for Cash Flow Hedge |  |  |  |  |  | $ (489) |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term loans additional information |  |  |  |  | The term loans bear interest at LIBOR plus a spread and are secured by, inter alia, (a) first priority mortgages over the financed vessels, (b) first priority assignments of all insurances and earnings of the mortgaged vessels and (c) corporate guarantees of Costamare or its subsidiaries, as the case may be. The loan agreements contain usual ship finance covenants, including restrictions as to changes in management and ownership of the vessels, additional indebtedness, mortgaging of vessels, as well as minimum requirements regarding hull Value Maintenance Clauses (?VMC?) in the range of 100% to 125% and dividend payments if an event of default has occurred and is continuing or would occur as a result of the payment of such dividend. |  |  |  |  |  |  |  |  |  |  |  |  |
Loan interest rates range |  |  |  |  | 1.11%-6.75% |  |  | 1.03%-6.75% |  |  |  |  |  |  |  |  |  |
Weighted average interest rates |  |  |  |  | 4.20% |  |  | 4.20% |  |  |  |  |  |  |  |  |  |
Loan for acquisition vessels Sealand New York Sealand Washington [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Initiation Date |  |  |  |  | May 2008 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity per vessel |  |  |  |  | $ 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Carrying Amount |  |  |  |  | $ 87,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding installments |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Frequency of Payments |  |  |  |  | semiannual |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Periodic Payment of Principal |  |  |  |  | $ 4,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment |  |  |  |  | $ 60,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Payment of Principal remaining period |  |  |  |  | November 2015 to May 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan available for draw down [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  | $ 120,000 |  |  |  |  |  |  |  |  |  |  |
Available period for draw down |  |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |
Loan To Partly Finance Acquisition Of Eleven Vessels And Sale Of Konstantina [Member ] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan repayment due to sale of vessels |  |  |  |  | $ 6,495 |  |  |  |  |  |  |  |  |  |  |  |  |
Loan To Partly Finance Acquisition Of Eleven Vessels And Sale Of Akritas [Member ] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan repayment due to sale of vessels |  |  |  |  | $ 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Supplemental agreement for loan to partly finance acquisition of eleven vessels and partly finance acquisition of vessel Neapolis [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  | $ 9,000 |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  | $ 9,000 |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of three h hulls first hull tranche [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | 48,765 |  |  |  |  |  |  |  |
Delivery date |  |  |  | January 14, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of three H hulls second hull tranche b [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | 48,765 |  |  |  |  |  |  |  |
Delivery date |  |  | March 14, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of three H hulls first hull tranche c [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | 48,765 |  |  |  |  |  |  |  |
Delivery date |  | April 28, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan for acquisition and construction of Two S hulls - Drawdowns [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | 106,960 | 30,560 |  |  |  |  |  |  |
Loan for acquisition and construction of Three hulls - Drawdowns [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  | $ 168,080 | $ 38,200 |  |  |  |  |  |  |
Supplemental agreement for Loan to partly finance agreegate market value eleven vessels partly finance acquisition Stadt Luebeck [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | $ 11,300 |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  |  |  | $ 11,300 |  |  |  |  |  |
Loan for acquisition construction (first drawdown) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  |  |  |  | $ 26,740 |  |  |  |  |
Loan for acquisition construction (two tranches one for each hull) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 152,800 |  |  |  |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,280 |  |  |  |  |
Loan for acquisition construction new (three tranches one for each hull) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt term loans [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 229,200 |
Draw down amount up to the end of the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,920 |  |

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