Costamare (CMRE) 20-F21 Feb 142013 FY Annual report (foreign)Financial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	12 Months Ended
Document and Entity Information	Dec. 31, 2013
Document and Entity Information [Abstract]	'
Document Type	'20-F
Document Period End Date	31-Dec-13
Amendment Flag	'false
Entity Registrant Name	'Costamare Inc.
Entity Central Index Key	'0001503584
Entity Current Reporting Status	'Yes
Entity Voluntary Filers	'No
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Accelerated Filer
Entity Well Known Seasoned Issuer	'No
Entity Common Stock Shares Outstanding	74,800,000
Preferred Shares issued	2,000,000
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'FY

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS [Abstract]:	'	'
Cash and cash equivalents	$93,379	$267,321
Restricted cash	9,067	5,330
Accounts receivable, net	16,145	2,237
Inventories	11,005	9,398
Due from related parties	2,679	2,616
Fair value of derivatives	0	165
Insurance claims receivable	1,429	1,454
Accrued charter revenue	409	5,100
Prepayments and other	2,450	1,862
Vessel held for sale	0	4,441
Total current assets	136,563	299,924
FIXED ASSETS, NET [Abstract]:	'	'
Advances for vessel acquisitions	240,871	339,552
Vessels, net	2,187,388	1,582,345
Total fixed assets, net	2,428,259	1,921,897
NON-CURRENT ASSETS [Abstract]:	'	'
Investment in affiliates	23,732	0
Accounts receivable non-current, net	7,334	0
Deferred charges, net	29,864	34,099
Restricted cash	49,826	41,992
Accrued charter revenue, non-current	10,264	13,422
Total assets	2,685,842	2,311,334
CURRENT LIABILITIES [Abstract]:	'	'
Current portion of long-term debt	206,717	162,169
Accounts payable	5,814	5,882
Accrued liabilities	14,386	9,292
Unearned revenue	9,601	5,595
Fair value of derivatives	55,322	55,701
Other current liabilities	3,140	10,772
Total current liabilities	294,980	249,411
NON-CURRENT LIABILITIES [Abstract]:	'	'
Long-term debt, net of current portion	1,660,859	1,399,720
Fair value of derivatives, net of current portion	47,890	125,110
Unearned revenue, net of current portion	25,164	16,641
Total non-current liabilities	1,733,913	1,541,471
COMMITMENTS AND CONTINGENCIES	0	0
STOCKHOLDERS' EQUITY [Abstract]:	'	'
Preferred stock	0	0
Common Stock	8	8
Additional paid-in capital	762,142	714,100
Accumulated deficit	-20,047	-40,814
Accumulated other comprehensive loss	-85,154	-152,842
Total stockholders' equity	656,949	520,452
Total liabilities and stockholders' equity	$2,685,842	$2,311,334

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES [Abstract]:	'	'	'
Voyage revenue	$414,249	$386,155	$382,155
EXPENSES [Abstract]:	'	'	'
Voyage expenses	-3,484	-5,533	-4,218
Voyage expenses-related parties	-3,139	-2,873	-2,877
Vessels' operating expenses	-115,998	-112,462	-110,359
General and administrative expenses	-7,517	-3,045	-3,958
General and administrative expenses-related parties	-1,000	-1,000	-1,000
Management fees-related parties	-16,580	-15,171	-15,349
Amortization of drydocking and special survey costs	-8,084	-8,179	-8,139
Depreciation	-89,958	-80,333	-78,803
Gain/ (Loss) on sale/disposal of vessels, net	518	-2,796	13,077
Foreign exchange gains / (losses), net	8	110	133
Operating income	169,015	154,873	170,662
OTHER INCOME (EXPENSES) [Abstract]:	'	'	'
Interest income	543	1,495	477
Interest and finance costs	-74,533	-74,734	-75,441
Equity in net earnings of investments	692	0	0
Other, net	822	-43	603
Gain /(Loss) on derivative instruments, net	6,548	-462	-8,709
Total other income (expenses)	-65,928	-73,744	-83,070
Net Income	103,087	81,129	87,592
Earnings allocated to Preferred Stock	-1,536	0	0
Net income available to Common Stockholders	$101,551	$81,129	$87,592
Earnings per common share, basic and diluted	$1.36	$1.20	$1.45
Weighted average number of shares, basic and diluted	74,800,000	67,612,842	60,300,000

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income for the year [Abstract]	'	'	'
Net income for the year	$103,087	$81,129	$87,592
Other comprehensive income/ (loss) [Abstract]	'	'	'
Unrealized gain /(loss) on cash flow hedges, net	70,886	-8,509	-55,482
Reclassification adjustment for gain/ (loss) on available for sale securities in net income	0	0	-8
Net settlements on interest rate swaps qualifying for cash flow hedge	-3,253	-3,196	-2,752
Amounts reclassified from Net settlements on interest rate swaps qualifying for hedge accounting to Depreciation	55	0	0
Other comprehensive income /(loss) for the year	67,688	-11,705	-58,242
Total comprehensive income for the year	$170,775	$69,424	$29,350

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Preferred Stock (Series B) [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Income (Loss) [Member]	Retained Earnings (Accumulated Deficit) [Member]
In Thousands, except Share data	Total	Preferred Stock (Series B) [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Income (Loss) [Member]	Retained Earnings (Accumulated Deficit) [Member]
Balance as of, Value at Dec. 31, 2010	$362,142	$0	$6	$519,971	($82,895)	($74,940)
Balance as of, Shares at Dec. 31, 2010	'	0	60,300,000	'	'	'
Net income	87,592	'	'	'	'	87,592
Dividends - Common stock	-61,506	'	'	'	'	-61,506
Other comprehensive income/ (loss)	-58,242	'	'	'	-58,242	'
Balance as of, value at Dec. 31, 2011	329,986	0	6	519,971	-141,137	-48,854
Balance as of, shares at Dec. 31, 2011	'	0	60,300,000	'	'	'
Net income	81,129	'	'	'	'	81,129
Dividends - Common stock	-73,089	'	'	'	'	-73,089
Other comprehensive income/ (loss)	-11,705	'	'	'	-11,705	'
Follow-on offerings proceeds, net, value	194,802	'	2	194,800	'	'
Follow-on offerings proceeds, net, shares	'	'	14,500,000	'	'	'
Follow-on offerings expenses	-671	'	'	-671	'	'
Balance as of, value at Dec. 31, 2012	520,452	0	8	714,100	-152,842	-40,814
Balance as of, shares at Dec. 31, 2012	'	0	74,800,000	'	'	'
Net income	103,087	'	'	'	'	103,087
Preferred stock Series B issuance, value	48,425	'	'	48,425	'	'
Preferred stock Series B issuance, shares	'	2,000,000	'	'	'	'
Preferred stock Series B expenses	-383	'	'	-383	'	'
Dividends - Common stock	-80,784	'	'	'	'	-80,784
Dividends - Preferred stock	-1,536	'	'	'	'	-1,536
Other comprehensive income/ (loss)	67,688	'	'	'	67,688	'
Balance as of, value at Dec. 31, 2013	$656,949	$0	$8	$762,142	($85,154)	($20,047)
Balance as of, shares at Dec. 31, 2013	'	2,000,000	74,800,000	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES [Abstract]:	'	'	'
Net income	$103,087	$81,129	$87,592
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]:	'	'	'
Depreciation	89,958	80,333	78,803
Allowance from doubtful amounts	3,703	0	0
Amortization and write off of financing costs	1,569	1,157	2,747
Amortization of deferred drydocking and special survey	8,084	8,179	8,139
Amortization of unearned revenue	0	-431	-650
Net settlements on interest rate swaps qualifying for cash flow hedge	-3,253	-3,196	-2,752
Loss/ (Gain) on derivative instruments	-6,548	462	8,709
Loss/ (Gain) on sale/disposal of vessels, net	-518	2,796	-13,077
Loss on sale of investments	0	0	8
Equity in net earnings of investments	-692	0	0
Changes in Operating Assets and Liabilities [Abstract]:	'	'	'
Accounts receivable	-22,737	-87	1,210
Due from related parties	-63	969	-2,288
Inventories	-1,607	-63	199
Insurance claims receivable	25	1,622	-2,329
Prepayments and other	-854	48	518
Accounts payable	-68	1,825	-71
Accrued liabilities	4,337	-1,162	665
Unearned revenue	3,194	-901	2,888
Other current liabilities	277	344	677
Drydockings	-6,189	-11,171	-6,122
Accrued charter revenue	14,976	6,261	30,313
Net Cash provided by Operating Activities	186,681	168,114	195,179
CASH FLOWS FROM INVESTING ACTIVITIES [Abstract]:	'	'	'
Investment in affiliates	-8,707	0	0
Proceeds from the sale of subsidiary	16,044	0	0
Advances for vessel acquisitions	-590,431	-191,179	-148,373
Vessels acquisitions/ Addition to vessel cost	-51,853	-74,053	-190,209
Proceeds from sale of available for sale securities	0	0	6,082
Proceeds from the sale of vessels, net	13,891	28,723	48,742
Net cash used in Investing Activities	-621,056	-236,509	-283,758
CASH FLOWS FROM FINANCING ACTIVITIES [Abstract]:	'	'	'
Offering proceeds, net of related expenses	48,042	194,131	0
Proceeds from long-term debt	469,356	288,639	226,293
Repayment of long-term debt	-163,669	-170,170	-124,610
Payment of financing costs	-210	-547	-9,233
Dividends paid	-81,515	-73,089	-61,506
Increase in restricted cash	-11,571	-1,244	-4,143
Net cash provided by Financing Activities	260,433	237,720	26,801
Net increase / (decrease) in cash and cash equivalents	-173,942	169,325	-61,778
Cash and cash equivalents at beginning of the year	267,321	97,996	159,774
Cash and cash equivalents at end of the year	93,379	267,321	97,996
SUPPLEMENTAL CASH INFORMATION [Abstract]:	'	'	'
Cash paid during the year for interest	$31,215	$28,269	$20,783

Organization_Consolidation_and

Organization Consolidation and Presentation of Financial Statements	12 Months Ended
	Dec. 31, 2013
Organization Consolidation and Presentation of Financial Statements [Abstract]:	'
Basis of Presentation and General Information [Text Block]	'

	1. Basis of Presentation and General Information:
	The accompanying consolidated financial statements include the accounts of Costamare Inc. (“Costamare”) and its wholly-owned subsidiaries (collectively, the “Company”). Costamare was formed on April 21, 2008, under the laws of the Republic of the Marshall Islands.
	Costamare was incorporated as part of a reorganization to acquire the ownership interest in 53 ship-owning companies owned by the Konstantakopoulos family (Vasileios Konstantakopoulos and his three sons Messrs. Konstantinos Konstantakopoulos, Achillefs Konstantakopoulos and Christos Konstantakopoulos, together the “Family”). The reorganization was completed in November 2008. On November 4, 2010, Costamare completed its initial public offering (“Initial Public Offering”) in the United States under the United States Securities Act of 1933, as amended (the “Securities Act”). On March 27, 2012 and on October 19, 2012, the Company completed two follow-on public offerings in the United States under the Securities Act and issued 7,500,000 shares and 7,000,000 shares, respectively, par value $0.0001, at a public offering price of $14.10 per share and $14.00 per share, respectively, increasing the issued share capital to 74,800,000 shares. At December 31, 2013, members of the Family owned, directly or indirectly, approximately 64.8% of the outstanding common shares, in the aggregate. Furthermore, on August 7, 2013, the Company completed a public offering of 2,000,000 shares of its 7.625% Series B Cumulative Redeemable Perpetual Preferred Stock (the “Series B Preferred Stock”), par value $0.0001, at a public offering price of $25.00 per share.
	As of December 31, 2012 and 2013, the Company owned and operated a fleet of 47 and 52 container vessels, respectively, with a total carrying capacity of approximately 239,498 TEU and 295,872 TEU, respectively, through wholly-owned subsidiaries incorporated in the Republic of Liberia. The Company provides worldwide marine transportation services by chartering its container vessels to some of the world's leading liner operators under long, medium and short-term time charters.
	At December 31, 2013, Costamare had 86 wholly-owned subsidiaries, all incorporated in the Republic of Liberia, except for one incorporated in the Republic of the Marshall Islands, out of which 52 operate vessels, 28 sold or disposed their vessels and are dormant, three were established in 2010 to be used for the acquisition of three newbuild vessels (Note 6), two were established to be used for future vessel acquisitions and one was established in 2013 to participate in investments (Note 9).

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Significant Accounting Policies [Abstract]:	'
Significant Accounting Policies and Recent Accounting Pronouncements [Text Block]	'

	2. Significant Accounting Policies and Recent Accounting Pronouncements:


	(a) Principles of Consolidation: The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements include the accounts of Costamare and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation.
	Costamare as the holding company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity. Under Accounting Standards Codification (“ASC”) 810 “Consolidation,” (formerly Accounting Research Bulletin (“ARB”) No. 51) a voting interest entity is an entity in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make financial and operating decisions. Costamare consolidates voting interest entities in which it owns all, or at least a majority (generally, greater than 50%), of the voting interest. Variable interest entities (“VIE”) are entities as defined under ASC 810-10, that in general either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. A controlling financial interest in a VIE is present when a company absorbs a majority of an entity's expected losses, receives a majority of an entity's expected residual returns, or both. The company with a controlling financial interest, known as the primary beneficiary, is required to consolidate the VIE. The Company evaluates all arrangements that may include a variable interest in an entity to determine if it may be the primary beneficiary, and would be required to include assets, liabilities and operations of a VIE in its consolidated financial statements. As of December 31, 2012 and 2013 no such interest existed.


	(b) Use of Estimates: The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.


	(c) Comprehensive Income / (Loss): In the statement of comprehensive income, the Company presents the change in equity (net assets) during a period from transactions and other events and circumstances from non-owner sources. It includes all changes in equity during a period except those resulting from investments by shareholders and distributions to shareholders. The Company follows the provisions of ASC 220 “Comprehensive Income”, and presents items of net income, items of other comprehensive income (“OCI”) and total comprehensive income in two separate but consecutive statements. Reclassification adjustments between OCI and net income are required to be presented separately on the statement of comprehensive income.


	(d) Foreign Currency Translation: The functional currency of the Company is the U.S. dollar because the Company's vessels operate in international shipping markets and, therefore, primarily transact business in U.S. dollars. The Company's books of accounts are maintained in U.S. dollars. Transactions involving other currencies during the year are converted into U.S. dollars using the exchange rates in effect at the time of the transactions. At the balance sheet dates, monetary assets and liabilities, which are denominated in other currencies, are translated into U.S. dollars at the year-end exchange rates. Resulting gains or losses are reflected separately in the accompanying consolidated statements of income.


	(e) Cash and Cash Equivalents: The Company considers highly liquid investments such as time deposits and certificates of deposit with an original maturity of three months or less to be cash equivalents.


	(f) Restricted Cash: Restricted cash is additional minimum cash deposits required to be maintained with certain banks under the Company's borrowing arrangements. Restricted cash includes bank deposits and deposits in so-called “retention accounts” that are required under the Company's borrowing arrangements which are used to fund the loan installments coming due. The funds can only be used for the purposes of loan repayment.


	(g) Receivables: The amount shown as receivables, at each balance sheet date, mainly includes receivables from charterers for hire, net of any provision for doubtful accounts. At each balance sheet date, all potentially uncollectible accounts are assessed individually for purposes of determining the appropriate provision for doubtful accounts. The provision established for doubtful accounts as of December 31, 2012 and 2013, is nil and $1,495, respectively.


	(h) Inventories: Inventories consist of bunkers, lubricants and spare parts (propellers and tail shafts) which are stated at the lower of cost or market on a consistent basis. Cost incurred to bring inventories to their present location and condition is determined by the first in, first out method.


	(i) Insurance Claims Receivable: The Company records insurance claim recoveries for insured losses incurred on damage to fixed assets and for insured crew medical expenses. Insurance claim recoveries are recorded, net of any deductible amounts, at the time the Company's fixed assets suffer insured damages or when crew medical expenses are incurred, recovery is probable under the related insurance policies and the claim is not subject to litigation.


	(j) Available-for-Sale Securities: Investments consisting of marketable government bonds (see Note 4) are classified as available-for-sale securities and reported at fair value as determined based on quoted market prices. Those investments with maturities of less than one year from the balance sheet date are considered short-term investments. Investments with maturities greater than one year from the balance sheet date are considered long-term investments. Unrealized gains and losses are reported in the statement of comprehensive income, with realized gains and losses recognized upon sale of the security and reported in investment income.


	(k) Vessels, Net: Vessels are stated at cost, which consists of the contract price and any material expenses incurred upon acquisition (initial repairs, improvements and delivery expenses, interest and on-site supervision costs incurred during the construction periods). Subsequent expenditures for conversions and major improvements are also capitalized when they appreciably extend the life, increase the earning capacity or improve the efficiency or safety of the vessels; otherwise these amounts are charged to expense as incurred.
	The cost of each of the Company's vessels is depreciated from the date of acquisition on a straight-line basis over the vessel's remaining estimated economic useful life, after considering the estimated residual value which is equal to the product of vessels' lightweight tonnage and estimated scrap rate (in the range of $0.150 to $0.300 per light weight ton). Management estimates the useful life of the Company's vessels to be 30 years from the date of initial delivery from the shipyard. Secondhand vessels are depreciated from the date of their acquisition through their remaining estimated useful life. When regulations place limitations over the ability of a vessel to trade on a worldwide basis, its remaining useful life is adjusted at the date such regulations are adopted.


	(l) Accrued Charter Revenue/Unearned Revenue: The Company records identified assets or liabilities associated with the acquisition of a vessel at fair value, determined by reference to market data. The Company values any asset or liability arising from the market value of the time charters assumed when a vessel is acquired from entities that are not under common control. This policy does not apply when a vessel is acquired from entities that are under common control. The amount to be recorded as an asset or liability at the date of vessel delivery is based on the difference between the current fair market value of the charter and the net present value of future contractual cash flows. When the present value of the contractual cash flows of the time charter assumed is greater than its current fair value, the difference is recorded as accrued charter revenue. When the opposite situation occurs, any difference, capped to the vessel's fair value on a charter free basis, is recorded as unearned revenue. Such assets and liabilities, respectively, are amortized as a reduction of, or an increase in, revenue over the period of the time charter assumed.


	(m) Impairment of Long-Lived Assets: The Company uses ASC 360 “Property plant and equipment”, which addresses financial accounting and reporting for the impairment or disposal of long-lived assets. The standard requires that long-lived assets and certain identifiable intangibles held and used by an entity be reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable.
	As of December 31, 2012 and 2013, the Company concluded that, as conditions in the worldwide shipping industry remain highly volatile, indicators existed which triggered the existence of potential impairment of its long-lived assets. These indicators included deterioration in the spot market, vessels' market values and the potential impact the current marketplace may have on its future operations. As a result, the Company performed an impairment assessment of the Company's long-lived assets by comparing the undiscounted projected net operating cash flows for each vessel to its respective carrying value. The Company's strategy is mainly to charter its vessels under long-term, fixed or variable rate time charters, providing the Company with contracted future cash flows.
	In developing estimates of future undiscounted cash flows, the Company makes assumptions and estimates about the vessels' future performance, with the significant assumptions being related to time charter rates, vessels' operating expenses, vessels' capital expenditures, vessels' residual value, fleet utilization and the estimated remaining useful life of each vessel. The assumptions used to develop estimates of future undiscounted cash flows are based on historical trends as well as future expectations and taking into consideration growth rates.
	The Company determines undiscounted projected net operating cash flows for each vessel and compares it to the vessel's carrying value. To the extent impairment indicators are present, the projected net operating cash flows are determined by considering the charter revenues from existing time charters for the fixed fleet days and an estimated daily time charter rate for the unfixed days (based on the most recent ten year historical average rates, inflated annually by a 3.30% growth rate being the historical and forecasted average world GDP nominal growth rate) over the remaining estimated life of the vessel assumed to be 30 years from the delivery of the vessel from the shipyard, expected outflows for vessels' operating expenses assuming an annual inflation rate of 3.50% (in line with the average world Consumer Price Index forecasted), planned dry-docking and special survey expenditures, management fees expenditures which are adjusted every year, after December 31, 2012, as provided under the Company's management agreements, by an inflation rate of 4.0% and fleet utilization of 99.2% (excluding the scheduled off-hire days for planned dry-dockings and special surveys which are determined separately ranging from 12 to 30 days depending on the size and age of each vessel) based on historical experience. The salvage value used in the impairment test is estimated to be in the range from $0.150 to $0.300 per light weight ton in accordance with the vessels' depreciation policy.
	The Company's assessment concluded that step two of the impairment analysis was not required and no impairment of vessels existed as of December 31, 2012 and 2013, as the undiscounted projected net operating cash flows per vessel exceeded the carrying value of each vessel. No impairment loss was recorded in 2011, 2012 or 2013.


	(n) Reporting Assets held-for-sale: It is the Company's policy to dispose of vessels and other fixed assets when suitable opportunities occur and not necessarily to keep them until the end of their useful life. Long-lived assets classified as held for sale are measured at the lower of their carrying amount or fair value less cost to sell. These assets are not depreciated once they meet the criteria to be held for sale. At December 31, 2012 and 2013, one vessel and no vessels, respectively, were classified as held-for-sale.


	(o) Accounting for Special Survey and Dry-docking Costs: The Company follows the deferral method of accounting for special survey and dry-docking costs whereby actual costs incurred are deferred and are amortized on a straight-line basis over the period through the date the next survey is scheduled to become due. Costs deferred are limited to actual costs incurred at the yard and parts used in the dry-docking or special survey. If a survey is performed prior to the scheduled date, the remaining unamortized balances are immediately written off. Unamortized balances of vessels that are sold are written off and included in the calculation of the resulting gain or loss in the period of the vessel's sale. Furthermore, unamortized dry-docking and special survey balances of vessels that are classified as Assets held for sale and are not recoverable as of the date of such classification are immediately written off to the statement of income.


	(p) Financing Costs: Costs associated with new loans or refinancing of existing loans, including fees paid to lenders or required to be paid to third parties on the lender's behalf for obtaining new loans or refinancing existing loans, are recorded as deferred charges. Such fees are deferred and amortized to interest and finance costs during the life of the related debt using the effective interest method. Unamortized fees relating to loans repaid or refinanced, meeting the criteria of debt extinguishment, are expensed in the period the repayment or refinancing is made.


	(q) Concentration of Credit Risk: Financial instruments, which potentially subject the Company to significant concentrations of credit risk, consist principally of cash and cash equivalents, accounts receivable (included in current and non current assets), investments in affiliates and derivative contracts (interest rate swaps and foreign currency contracts). The Company places its cash and cash equivalents, consisting mostly of deposits, with high credit rated financial institutions. The Company performs periodic evaluations of the relative credit standing of those financial institutions. The Company is exposed to credit risk in the event of non-performance by counterparties to derivative instruments; however, the Company limits its exposure by diversifying among counterparties with high credit ratings. The Company limits its credit risk with accounts receivable and investments in affiliates by performing ongoing credit evaluations of its customers' and affiliates' financial condition and generally does not require collateral for its accounts receivable.


	(r) Voyage Revenues: Voyage revenues are generated from time charter agreements and are usually paid 15 days in advance. Time charter agreements with the same charterer are accounted for as separate agreements according to the terms and conditions of each agreement. Time charter revenues over the term of the charter are recorded as service is provided, when they become fixed and determinable.
	Revenues from time charter agreements providing for varying annual rates are accounted for as operating leases and thus recognized on a straight-line basis as the average revenue over the rental periods of such agreements, as service is performed. A voyage is deemed to commence upon the completion of discharge of the vessel's previous cargo and the sea passage for the next fixed cargo and is deemed to end upon the completion of discharge of the current cargo, provided an agreed non-cancelable charter agreement between the Company and the charterer is in existence, the charter rate is fixed or determinable and collectability is reasonably assured. Unearned revenue includes cash received prior to the balance sheet date for which all criteria to recognize as revenue have not been met, including any unearned revenue resulting from charter agreements providing for varying annual rates, which are accounted for on a straight-line basis. Unearned revenue also includes the unamortized balance of the liability associated with the acquisition of second-hand vessels with time charters attached which were acquired at values below fair market value at the date the acquisition agreement is consummated, as well as revenue recognized based on the average hire rate as derived from the entire duration of the charter party, rather than being recognized on the per year hire rates provided in the charter party when the daily hire rate decreases over time.
Revenues for 2011, 2012 and 2013, derived from significant charterers individually accounting for 10% or more of revenues (in percentages of total revenues) were as follows:







		2011		2012		2013
A		18	%	24	%	24	%
B		34	%	33	%	31	%
C		16	%	17	%	16	%
D		10	%	10	%	9	%
E		6	%	7	%	13	%
Total		84	%	91	%	93	%





(s) Voyage Expenses: Voyage expenses primarily consist of port, canal and bunker expenses that are unique to a particular charter and are paid for by the charterer under time charter arrangements or by the Company under voyage charter arrangements and commissions and fees, which are always paid for by the Company, regardless of the charter type. All voyage and vessel operating expenses are expensed as incurred, except for commissions. Commissions are deferred over the related voyage charter period to the extent revenue has been deferred since commissions are earned as the Company's revenues are earned.


(t) Repairs and Maintenance: All repair and maintenance expenses, including underwater inspection expenses, are expensed in the year incurred. Such costs are included in vessel operating expenses in the accompanying consolidated statements of income.


(u) Derivative Financial Instruments: The Company enters into interest rate swap contracts to manage its exposure to fluctuations of interest rate risks associated with specific borrowings. Interest rate differentials paid or received under these swap agreements are recognized as part of the interest expense related to the hedged debt. All derivatives are recognized in the consolidated financial statements at their fair value. On the inception date of the derivative contract, the Company designates the derivative as a hedge of a forecasted transaction or the variability of cash flow to be paid (“cash flow” hedge). Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in the consolidated statement of comprehensive income until earnings are affected by the forecasted transaction or the variability of cash flow and are then reported in earnings. Changes in the fair value of undesignated derivative instruments and the ineffective portion of designated derivative instruments are reported in earnings in the period in which those fair value changes have occurred. Realized gains or losses on early termination of the derivative instruments are also classified in earnings in the period of termination of the respective derivative instrument. The Company may re-designate an undesignated hedge after its inception as a hedge but then will consider its non zero value at re-designation in its assessment of effectiveness of the cash flow hedge.
The Company, at each reporting date, formally documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions.
This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions or variability of cash flow.
The Company also formally assesses, both at the hedge's inception and, on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flow of hedged items. The Company considers a hedge to be highly effective if the change in fair value of the derivative hedging instrument is within 80% to 125% of the opposite change in the fair value of the hedged item attributable to the hedged risk. When it is determined that a derivative is not highly effective as a hedge or that it has ceased to be a highly effective hedge, the Company discontinues hedge accounting prospectively, in accordance with ASC 815 “Derivatives and Hedging”.
The Company also enters forward exchange rate contracts to manage its exposure to currency exchange risk on certain foreign currency liabilities. The Company has not designated these forward exchange rate contracts for hedge accounting.


(v) Earnings per Share: Basic earnings per share are computed by dividing net income attributable to common equity holders by the weighted average number of shares of common stock outstanding during the year. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised. The Company had no dilutive securities outstanding during the three-year period ended December 31, 2013. Earnings per share attributable to common equity holders is adjusted by the contractual amount of dividends related to the preferred stock holders that accrue for the period.


(w) Fair Value Measurements: The Company adopted, as of January 1, 2008, ASC 820 “Fair Value Measurements and Disclosures”, which defines, and provides guidance as to the measurement of, fair value. This standard creates a hierarchy of measurement and indicates that, when possible, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The fair value hierarchy gives the highest priority (Level 1) to quoted prices in active markets and the lowest priority (Level 3) to unobservable data, for example, the reporting entity's own data. Under the standard, fair value measurements are separately disclosed by level within the fair value hierarchy. The standard applies when assets or liabilities in the financial statements are to be measured at fair value, but does not require additional use of fair value beyond the requirements in other accounting principles (Notes 18 and 19).
ASC 825 “Financial Instruments”, permits companies to report certain financial assets and financial liabilities at fair value. ASC 825 was effective for the Company as of January 1, 2008, at which time the Company could elect to apply the standard prospectively and measure certain financial instruments at fair value.
The Company has evaluated the guidance contained in ASC 825, and has elected not to report any existing financial assets or liabilities at fair value that are not already so reported; therefore, the adoption of the statement had no impact on its financial position and results of operations. The Company retains the ability to elect the fair value option for certain future assets and liabilities acquired under this standard.


(x) Segment Reporting: The Company reports financial information and evaluates its operations by charter revenues and not by the length of ship employment for its customers, i.e., spot or time charters. The Company does not use discrete financial information to evaluate the operating results for each such type of charter. Although revenue can be identified for these types of charters, management cannot and does not identify expenses, profitability or other financial information for these charters. Furthermore, when the Company charters a vessel to a charterer, the charterer is free to trade the vessel worldwide (subject to certain agreed exclusions) and, as a result, the disclosure of geographic information is impracticable. As a result, management, including the chief operating decision maker, reviews operating results solely by revenue per day and operating results of the fleet and thus the Company has determined that it operates under one reportable segment.





(y) Investments in Affiliate: Investments in the common stock of entities, in which the Company has significant influence over operating and financial policies, are accounted for using the equity method. Under this method, the investment in the affiliate is initially recorded at cost and is adjusted to recognize the Company's share of the earnings or losses of the investee after the acquisition date and is adjusted for impairment whenever facts and circumstances indicate that a decline in fair value below the cost basis is other than temporary. The amount of the adjustment is included in the determination of net income / (loss). Dividends received from an affiliate reduce the carrying amount of the investment. When the Company's share of losses in an affiliate equals or exceeds its interest in the affiliate, the Company does not recognize further losses unless the Company has incurred obligations or made payments on behalf of the affiliate.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2013
Related Party Transactions [Abstract]:	'
Transactions with Related Parties [Text Block]	'

	3. Transactions with Related Parties:
	(a) Costamare Shipping Company S.A. *(the “Manager” or “Costamare Shipping”):* Costamare Shipping is a ship management company wholly-owned by Mr. Konstantinos Konstantakopoulos, the Company's Chief Executive Officer and, as such, is not part of the consolidated group of the Company, but is a related party. Costamare Shipping provides the Company with general administrative services, certain commercial services, director and officer related insurance services and the services of the Company's officers. Costamare Shipping receives $1,000 annually on a prorated basis for the services of the Company's officers in aggregate.
	Costamare Shipping, itself or through Shanghai Costamare Ship Management Co., Ltd. (“Shanghai Costamare”), which is also controlled by Mr. Konstantakopoulos, or through or together with a third party sub-manager, provides technical, crewing, commercial, provisioning, bunkering, sale and purchase, chartering, accounting, insurance and administrative services in exchange for a daily fee for each containership. Up to April 2013, Costamare Shipping also provided such services through Ciel Shipmanagement S.A. (“CIEL”), another company controlled by Mr. Konstantakopoulos. We refer to Costamare Shipping and Shanghai Costamare and, up to April 2013, CIEL as our “affiliated managers”.
	Pursuant to the management agreement, Costamare Shipping receives a daily fee for each containership as follows: (i) for each containership (subject to any charter other than a bareboat charter) it receives a daily fee of $0.884 since January 1, 2013 ( $0.850 for 2012 and 2011), prorated for the calendar days the Company owns each containership and for the three-month period following the date of the sale of a vessel, (ii) for each containership subject to a bareboat charter it receives a daily fee of $0.442 since January 1, 2013 ($0.425 for 2012 and 2011), prorated for the calendar days the Company owns each containership and for the three-month period following the date of the sale of a vessel.
	The Company also pays to Costamare Shipping (i) a flat fee of $700 for the supervision of the construction of any newbuild vessel contracted by the Company, provided that such flat fee (which is fixed at the time of the ordering of any newbuild and remains constant until its delivery) will be annually adjusted upwards by 4% for any vessels ordered after December 31, 2012, with further annual increases permitted to reflect any strengthening of the Euro against the U.S. dollar and/or material unforeseen cost increases, and (ii) a fee of 0.75% on all gross freight, demurrage, charter hire, ballast bonus or other income earned with respect to each containership in the Company's fleet.
	The initial term of the management agreement expires on December 31, 2015 and will be automatically extended in additional one-year increments until December 31, 2020, at which point it will expire. The daily management fee for each containership was fixed until December 31, 2012 and is thereafter annually adjusted upwards by 4%, with further annual increases permitted to reflect the strengthening of the Euro against the U.S. dollar and/or material unforeseen cost increases. After the initial term expires on December 31, 2015, the Company will be able to terminate the management agreement, subject to a termination fee, by providing written notice to Costamare Shipping at least 12 months before the end of the subsequent one-year term. The termination fee is equal to (a) the lesser of (i) five and (ii) the number of full years remaining prior to December 31, 2020, times (b) the aggregate fees due and payable to Costamare Shipping during the 12-month period ending on the date of termination; provided that the termination fee will always be at least two times the aggregate fees over the 12-month period described above.
	On January 7, 2013, Costamare Shipping entered into a co-operation agreement (the “Co-operation Agreement”) with third-party ship managers V.Ships Greece Ltd. (“V.Ships Greece”), pursuant to which the two companies established a ship management cell (the “Cell”) under V.Ships Greece. Since April 2013, the Cell has provided technical, crewing, provisioning, bunkering, sale and purchase and accounting services, as well as certain commercial and insurance services to certain of the Company's container vessels (including all container vessels previously managed by CIEL), pursuant to separate management agreements entered into between V.Ships Greece and the ship-owning company of the respective container vessel, for a daily management fee. Costamare Shipping remains the head manager for all vessels owned by the Company.
	The Cell also offers ship management services to third-party owners. Costamare Shipping passes to the Company the net profit, if any, it receives pursuant to the Co-operation Agreement as a refund or reduction of the management fees payable by the Company to Costamare Shipping under the Group Management Agreement. As at December 31, 2013, the Cell provided technical, crewing, provisioning, bunkering, sale and purchase and accounting services, as well as certain commercial management services to 18 Costamare Inc. vessels.
	Management fees charged by the Manager in the years ended December 31, 2011, 2012 and 2013, amounted to $12,038, $12,208 and $15,570, respectively, and are included in Management fees-related parties in the accompanying consolidated statements of income. In addition, the Manager charged (i) $3,139 for the year ended December 31, 2013 ($2,873 for the year ended December 31, 2012 and $2,877 for the year ended December 31, 2011), representing a fee of 0.75% on all gross revenues, as provided in the management agreements with each subsidiary, which is separately reflected as Voyage expenses-related parties in the accompanying consolidated statements of income for the years ended December 31, 2011, 2012 and 2013, respectively, (ii) $1,000 for the services of the Company's officers in aggregate, which is separately reflected as General and administrative expenses-related parties in the accompanying consolidated statements of income for the year ended December 31, 2013 ($1,000 for the year ended December 31, 2012 and $1,000 for the year ended December 31, 2011) and (iii) $2,450 supervision fees for seven newbuild vessels, which is included in Advances for vessels acquisition in the accompanying 2013 consolidated balance sheet ($3,500 for ten vessels which is recorded in Advances for vessels acquisition in the accompanying 2012 consolidated balance sheet). Furthermore, in accordance with the management agreement with V.Ships Greece, V.Ships Greece has been provided the amount of $1,350 ($75 per vessel) as working capital security, which is included in Accounts receivable, non-current in the accompanying 2013 consolidated balance sheet.
	During the year ended December 31, 2013, the Manager charged in aggregate to the companies established pursuant to the Framework Agreement (Notes 9 and 10) the amount of $1,070 for services provided in accordance with the respective management agreements
	The balance due from the Manager at December 31, 2012 and 2013, amounted to $1,561 and $2,076, respectively, which are included in Due from related parties in the accompanying 2012 and 2013 consolidated balance sheets.
	(b) Ciel Shipmanagement S.A.: CIEL, a company incorporated in the Republic of Liberia, is wholly-owned, effective November 30, 2012, by Mr. Konstantinos Konstantakopoulos, the Company's Chairman and Chief Executive Officer (prior to November 30, 2012, Mr. Konstantinos Konstantakopoulos owned 50.2% and Mr. Dimitrios Lemonidis owned 49.8% of CIEL). CIEL was not part of the consolidated group of the Company but was an affiliated manager up to April 2013. CIEL, up to April 2013, provided the Company's vessels certain ship management services such as technical support and maintenance, financial and accounting services, under separate management agreements signed between CIEL and each ship-owning company, in exchange for a daily fixed fee of $0.600 per vessel ($0.600 in 2012 and 2011). CIEL specialized, although not exclusively, in managing containerships of up to 3,500 TEU. As of December 31, 2013, CIEL did not provide technical, crewing, provisioning, bunkering, sale and purchase and accounting services, or other commercial services, to any (twelve at December 31, 2012) of the Company's containerships. Management fees charged by CIEL in 2011, 2012 and 2013 amounted to $3,311, $2,963 and $1,010, respectively, and are included in Management fees-related parties in the accompanying consolidated statements of income. The balance due from CIEL at December 31, 2012 and 2013, amounted to $1,055 and $603, respectively and is included in Due from related parties in the accompanying consolidated balance sheets.

	(c) Shanghai Costamare Ship Management Co. Ltd.: Shanghai Costamare is owned (indirectly) 70% by the Company's Chairman and Chief Executive Officer and 30% (indirectly) by Shanghai Costamare's General Manager, Mr. Shen Xiao Dong. Shanghai Costamare is a company incorporated in the Peoples' Republic of China in September 2004 and is not part of the consolidated group of the Company but is an affiliated manager. The technical, crewing, provisioning, bunkering, sale and purchase and accounting services, as well as certain commercial services of certain of the Company's vessels have been subcontracted from the Manager to Shanghai Costamare. As of December 31, 2013, Shanghai Costamare provided such services to nine (nine as of December 31, 2012) of the Company's containerships. There was no balance due from/to Shanghai Costamare at both December 31, 2012 and 2013.

Investments

Investments	12 Months Ended
Investments	Dec. 31, 2013
Available For Sale Securities [Abstract]:	'
Investments [Text Block]	'

	4. Investments:

	As at December 31, 2010, the Company held, at fair value, a Province of Ontario bond amounting to $6,080 upon maturity of which, on February 22, 2011, the Company collected the amount of $6,082 and the amount of $8 was transferred to Interest Income from Other Comprehensive Income in the accompanying 2011 consolidated statement of income.

Inventories

Inventories	12 Months Ended
Inventories	Dec. 31, 2013
Inventory Disclosure [Abstract]:	'
Inventories [Text Block]	'

	5. Inventories:
	The amounts in the accompanying consolidated balance sheets are analyzed as follows:



		2012		2013
	Bunkers		268		303
	Lubricants		7,448		9,044
	Spare parts		1,682		1,658
	Total		9,398		11,005

Advances_for_Vessel_Acquisitio

Advances for Vessel Acquisitions	12 Months Ended
	Dec. 31, 2013
Advances for Vessel Acquisitions Disclosure [Abstract]	'
Advances for Vessel Acquisitions [Text Block]	'

	6. Advances for Vessels Acquisitions:
	On September 21, 2010, the Company through its three wholly-owned subsidiaries, Adele Shipping Co., Bastian Shipping Co. and Cadence Shipping Co., contracted with a shipyard for the construction and purchase of three newbuild vessels (Hulls H1068A, H1069A and H1070A), each of approximately 9,403 TEU capacity at a contract price per newbuild vessel of $95,080. These three newbuild vessels are scheduled to be delivered between January 2014 and April 2014 (Note 21(c)) and the Company entered into ten-year charter party agreements from their delivery from the shipyard at a daily rate of $43 each.
	On January 28, 2011, the Company, through its two wholly-owned subsidiaries Jodie Shipping Co. and Kayley Shipping Co., contracted with a shipyard for the construction and purchase of two newbuild vessels (Hulls S4010 and S4011), each of approximately 8,827 TEU capacity. The Company entered into ten-year charter party agreements from their delivery from the shipyard. Both the contract price and the daily charter rate are similar to those agreed with respect to the three 9,403 TEU vessels discussed in the preceding paragraph. The newbuild vessels MSC Athens (Hull S4010) and MSC Athos (Hull S4011) were delivered to the Company on March 14, 2013 and April 8, 2013, respectively, and the amount of $196,675, in aggregate, which includes the contract price, capitalized interest and financing costs and other capitalized costs, was transferred to Vessels, net. Upon their delivery, MSC Athens and MSC Athos commenced their ten-year charter party employment.
	On April 20, 2011, the Company, through its five wholly-owned subsidiaries Quentin Shipping Co., Raymond Shipping Co., Sander Shipping Co., Terance Shipping Co. and Undine Shipping Co., contracted with a shipyard for the construction and purchase of five newbuild vessels (Hulls S4020, S4021, S4022, S4023 and S4024), each of approximately 8,827 TEU capacity. The Company entered into long-term time charter agreements for the employment of each of the above newbuild vessels immediately upon delivery from the shipyard. Both the contract price and the daily charter rate are similar to those agreed on September 21, 2010, for the three approximately 9,403 TEU vessels discussed above. The newbuild vessels Valor (Hull S4020), Value (Hull S4021), Valiant (Hull S4022), Valence (Hull S4023) and Vantage (Hull S4024) were delivered to the Company on June 3, 2013, June 25, 2013, August 5, 2013, September 2, 2013 and November 8, 2013, respectively, and the amount of $492,437, in aggregate, which includes the contract price, capitalized interest and financing costs and other capitalized costs, was transferred to Vessels, net. Upon their delivery, Valor, Value, Valiant, Valence and Vantage commenced their long-term charter party employment.
	The total aggregate price for all ten newbuild vessels is $953,740, payable in installments until their deliveries, of which $896,825 was paid up to December 31, 2013 ($324,329 paid up to December 31, 2012 and $143,131 paid during the year ended December 31, 2011).
	The amount of $339,552 and $240,871 is included in Advances for vessel acquisitions in the accompanying 2012 and 2013 consolidated balance sheets, respectively and represents amounts paid to the shipyards and other costs, as analyzed below:



		2012	2013
	Pre-delivery installments	324,329	896,825
	Capitalized interest and finance costs	8,053	15,898
	Other capitalized costs	7,170	17,260
	Transferred to Vessels, net	-	(689,112	)
	Total	339,552	240,871



	The shipbuilding contracts in respect of the vessels under construction as at December 31, 2013, have been assigned to the lending banks as security under the loans discussed in Note 11.

Vessels

Vessels	12 Months Ended
Vessels	Dec. 31, 2013
Property Plant and Equipment [Abstract]:	'
Vessels, Net [Text Block]	'

	7. Vessels, Net:
	The amounts in the accompanying consolidated balance sheets are analyzed as follows:

		Vessel Cost			Accumulated			Net Book
		Vessel Cost			Depreciation			Value
	Balance, January 1, 2011		2,148,860			-617,250			1,531,610
	Depreciation		-			(78,803	)		(78,803	)
	Vessel acquisitions and other vessels' cost		194,040			-			194,040
	Disposals		(44,792	)		16,832			(27,960	)
	Balance, December 31, 2011		2,298,108			-679,221			1,618,887
	Depreciation		-			(80,333	)		(80,333	)
	Transfer to assets held for sale		(25,000	)		20,697			(4,303	)
	Vessel acquisitions and other vessels' cost		74,053			-			74,053
	Disposals		(43,125	)		17,166			(25,959	)
	Balance, December 31, 2012		2,304,036			-721,691			1,582,345
	Depreciation		-			(89,903	)		(89,903	)
	Vessel acquisitions and other vessels' cost		51,853			-			51,853
	Transfer from advances for vessel acquisitions		689,112			-			689,112
	Derecognition of vessels		(29,659	)		53			(29,606	)
	Disposals		(54,343	)		37,930			(16,413	)
	Balance, December 31, 2013		2,960,999			-773,611			2,187,388



	During the year ended December 31, 2011, the Company acquired the secondhand containerships Prosper, MSC Reunion, MSC Sierra II, MSC Namibia II, MSC Romanos and MSC Methoni at an aggregate cost of $154,826.
	During the year ended December 31, 2011, the Company contracted to sell for scrap the vessels MSC Namibia, MSC Sierra, MSC Sudan, MSC Fado, MSC Tuscany and Garden, while the vessel Rena was determined to be a constructive total loss (“CTL”) for insurance purposes in October 2011. From the sale of these six vessels and the CTL of Rena, the Company received in aggregate $48,742 and recognized an aggregate gain of $13,077 (including the effect of a provision recorded for potential costs associated with the grounding of Rena), which is included in Gain / (Loss) on sale / disposal of vessels, net in the accompanying 2011 consolidated statement of income.
	During the year ended December 31, 2012, the Company acquired five secondhand containerships, MSC Ulsan, Koroni, Kyparissia, Stadt Luebeck and Messini at an aggregate price of $73,000.
	During the year ended December 31, 2012, the Company sold for scrap the container vessels Gather, Gifted, Genius I and Horizon at an aggregate price of $22,110 and recognized a net loss of $2,796 (including the effect of the partial reversal of a provision recorded in 2011 for costs associated with the grounding of Rena), which is separately reflected in Gain / (Loss) on sale / disposal of vessels, net in the accompanying 2012 statement of income.
	During the year ended December 31, 2013, the Company took delivery from the shipyard of the seven newbuild container vessels MSC Athens, MSC Athos, Valor, Value, Valiant, Valence and Vantage at an aggregate cost of $689,112 (Note 6). Furthermore, during the year ended December 31, 2013, the Company acquired the four secondhand container vessels Venetiko, Petalidi, Ensenada Express and X-Press Padma at an aggregate price of $51,853. On July 12, 2013, pursuant to the Framework Agreement (Notes 9 and 10), York (as defined below) participated with 51% interest in the share capital of the ship-owning companies of the vessels Petalidi, Ensenada Express and X-Press Padma (Note 10). As at that date, the net book value of these vessels was $29,606, in aggregate.
	On December 3, 2012, the Company contracted to sell for scrap the vessel MSC Washington at a sale price of $8,154. The vessel was delivered to her scrap buyers on January 2, 2013. As of December 31, 2012, the Company had received the total sale price from the scrap buyers amounting to $7,909, net of expenses related to the sale, which is included in Other current liabilities in the 2012 consolidated balance sheet. During the year ended December 31, 2013, the Company sold for scrap the container vessels MSC Austria and MSC Antwerp at an aggregate sale price of $15,655. From the aforementioned 2013 sales, the Company recognized a net gain of $518, which is separately reflected in Gain / (Loss) on sale / disposal of vessels, net in the accompanying 2013 consolidated statement of income.
	As of December 31, 2013, one of the Company's vessels, having total carrying value of $4,751 was fully depreciated.
	Forty-nine of the Company's vessels, having a total carrying value of $2,051,038 as of December 31, 2013, have been provided as collateral to secure the long-term debt discussed in Note 11.

Deferred_Charges

Deferred Charges	12 Months Ended
Deferred Charges	Dec. 31, 2013
Deferred Charges Disclosure [Abstract]:	'
Deferred Charges [Text Block]	'

	8. Deferred Charges:
	The amounts in the accompanying consolidated balance sheets are analyzed as follows:


		Financing Costs			Dry-docking			Total
					and Special
					Survey Costs
	Balance, January 1, 2011		5,437			25,430			30,867
	Additions		9,233			6,122			15,355
	Amortization		(2,747	)		(8,139	)		(10,886	)
	Write-off		-			(2,695	)		(2,695	)
	Balance, December 31, 2011		11,923			20,718			32,641
	Additions		547			11,171			11,718
	Amortization		(1,143	)		(8,179	)		(9,322	)
	Write-off		(14	)		(786	)		(800	)
	Transfer to assets held for sale		-			(138	)		(138	)
	Balance, December 31, 2012		11,313			22,786			34,099
	Additions		210			6,189			6,399
	Amortization		(1,569	)		(8,084	)		(9,653	)
	Derecognition of deferred charges		-			(553	)		(553	)
	Write-off		-			(428	)		(428	)
	Balance, December 31, 2013		9,954			19,910			29,864




	Financing costs represent fees paid to the lenders for the conclusion of the bank loans discussed in Note 11. The amortization of loan financing costs is included in interest and finance costs in the accompanying consolidated statements of income and the amortization of the dry-docking and special survey costs is separately reflected in the accompanying consolidated statements of income.
	During the years ended December 31, 2011, 2012 and 2013, eight, nine and eight vessels (including the Petalidi (Note 10)), respectively, underwent their special survey.

Costamare_Ventures_Inc

Costamare Ventures Inc.	12 Months Ended
Costamare Ventures Inc.	Dec. 31, 2013
Costamare Ventures Inc. [Abstract]:	'
Costamare Ventures Inc. [Text Block]	'

	9. Costamare Ventures Inc.:

	On May 15, 2013, the Company, along with its wholly-owned subsidiary, Costamare Ventures Inc. (“Costamare Ventures”), entered into a Framework Deed (the “Framework Agreement”) with York Capital Management Global Advisors LLC and its affiliate Sparrow Holdings, L.P. (collectively, “York”) to invest jointly in the acquisition of container vessels. Under the Framework Agreement the decisions regarding vessel acquisitions will be made jointly by Costamare Ventures and York and the Company reserves the right to acquire any vessels that York decides not to pursue.
	Under the terms of the Framework Agreement, York has agreed to invest up to $250 million in mutually agreed vessel acquisitions and Costamare Ventures has agreed to invest a minimum of $75 million with an option to invest up to $240 million in these transactions. Depending on the amount Costamare Ventures elects to invest, it is expected that it will hold between 25% and 49% of the equity in the entities that will be formed under the Framework Agreement (the “affiliate ship-owning companies”) and York will hold the balance. Costamare Shipping provides shipmanagement and administrative services to the vessels acquired under the Framework Agreement, with the right to subcontract to V.Ships Greece and/or Shanghai Costamare. The Framework Agreement will terminate on its sixth anniversary or upon the occurrence of certain extraordinary events as defined therein. At that time, Costamare Ventures may elect to divide the vessels owned by all such vessel-owning entities between itself and York to reflect their cumulative participation in all such entities. The Company accounts for the entities formed under the Framework Agreement as equity investments. As at December 31, 2013, the Company holds a range of 25% to 49% of the capital stock of eight jointly-owned companies formed pursuant to the Framework Agreement with York (Note 10).

Investments_in_affiliate

Investments in affiliate	12 Months Ended
Investments in affiliate	Dec. 31, 2013
Investments in affiliate [Abstract]:	'
Investments in affiliate [Text Block]	'


	10. Investments in Affiliate:

	The affiliate ship-owning companies, all of which are incorporated in the Marshall Islands and are accounted for under the equity method, are as follows:


					Participation %	Year Established /Acquired
	Entity		Vessel/Hull		31-Dec-13	Year Established /Acquired
	Steadman Maritime Co.		Ensenada Express		49%	1-Jul-13
	Marchant Maritime Co.		X-Press Padma		49%	8-Jul-13
	Horton Maritime Co.		Petalidi		49%	26-Jun-13
	Kemp Maritime Co.		Hull NCP0113		49%	6-Jun-13
	Hyde Maritime Co.		Hull NCP0114		49%	6-Jun-13
	Ainsley Maritime Co.		Hull NCP0115		25%	25-Jun-13
	Ambrose Maritime Co.		Hull NCP0116		25%	25-Jun-13
	Connell Maritime Co.		n/a	40%		18-Dec-13



	On July 12, 2013, in accordance with the Framework Agreement, York contributed $16,044, in the aggregate, in order to acquire a 51% equity interest in the affiliate ship-owning companies Steadman Maritime Co., Marchant Maritime Co. and Horton Maritime Co., and for initial working capital of such affiliate ship-owning companies. There was no difference between (a) the aggregate of the fair value of the consideration received and the fair value of the retained investment, as compared with (b) the carrying amount of the former subsidiaries assets and liabilities, in each case at the date the subsidiaries were deconsolidated.
	Furthermore, in July 2013, Costamare Ventures participated with 49% in the equity of Kemp Maritime Co. and Hyde Maritime Co. who entered into ship-building contracts for the construction of two 9,000 TEU container vessels, subject to upgrade, by contributing $8,707, in the aggregate.
	The summarized financial information of the affiliates is as follows:


		31-Dec-13
	Non-current assets	49,072
	Current assets	3,184
		52,256

	Current liabilities	2,196


		Period July 12, 2013 to December 31, 2013
	Voyage revenue	5,580
	Net Income	1,410

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Long-Term Debt [Abstract]:	'
Long-Term Debt [Text Block]	'

	11. Long-Term Debt:
	The amounts shown in the accompanying consolidated balance sheets consist of the following:



	Borrower(s)				2012					2013
	1	Credit Facility					767,164				675,774
	2	Term Loans:
		1	Costis Maritime Corporation and Christos Maritime Corporation			109,500			100,500
		2	Mas Shipping Co.			54,750			47,000
		3	Montes Shipping Co. and Kelsen Shipping Co.			102,000			90,000
		4	Marathos Shipping Inc.			-			-
		5	Capetanissa Maritime Corporation			60,000			55,000
		6	Rena Maritime Corporation			57,500			52,500
		7	Bullow Investments Inc.			-			-
		8	Merin Shipping Co., Lytton Shipping Co., Venor Shipping Co. and Volk Shipping Co.
						-			-
		9	Costamare Inc.			103,986			90,100
		10	Adele Shipping Co., Bastian Shipping Co. and Cadence Shipping Co.			32,199			146,295
		11	Costamare Inc.			53,480			129,243
		12	Undine Shipping Co., Quentin Shipping Co. and Sander Shipping Co.			61,120			224,107
		13	Raymond Shipping Co. and Terance Shipping Co.			45,840			148,707
		14	Costamare Inc.			114,350			108,350
						794,725			1,191,802
			Total			1,561,889			1,867,576
			Less-current portion			(162,169		)	(206,717			)
			Long-term portion			1,399,720			1,660,859



	1. Credit Facility: On July 22, 2008, the Company signed a loan agreement with a consortium of banks, for a $1,000,000 Credit Facility (the “Facility”) for general corporate and working capital purposes. The Company used $631,340 of the proceeds from the Facility to repay the then existing indebtedness. The Facility bears interest at the 3, 6, 9 or 12 months (at the Company's option) LIBOR plus margin. Following the sale of MSC Antwerp (ex. Sophia Britannia) (Note 7) the Company, on September 30, 2013, repaid $1,500 of the Facility.
	The outstanding balance of the Facility as of December 31, 2013, is repayable in 18 equal, consecutive quarterly installments, of $22,473 each plus a balloon payment of $271,260 payable together with the last installment. The quarterly installments were calculated using a formula specified in the agreement, following the amalgamation of the Facility's compounds on June 30, 2011, as documented in the third supplemental agreement to the Facility that the Company entered into on September 6, 2011.
	On December 17, 2012, the Company entered into a fourth supplemental agreement which released two of the Company's subsidiaries guarantors and the mortgages over their vessels and replaced them with mortgages over two other vessels. On May 28, 2013, the Company entered into a fifth supplemental agreement under which the bank agreed to the change of flags of five of the Company's vessels and to the transfer of the technical management of two of the Company's vessels to V.Ships Greece. On August 30, 2013, the Company entered into a sixth supplemental agreement which released one of the Company's subsidiary guarantor and the mortgage over its vessel and replaced it with mortgages over two other vessels.
	The Facility, as of December 31, 2013, was secured with, among others, first priority mortgages over 18 of the Company's vessels, first priority assignment of vessels' insurances and earnings, charter party assignments, first priority pledges over the operating accounts and corporate guarantees of 18 ship-owning companies.
	The Facility and certain of the term loans described under Note 11.2 below include among others, financial covenants requiring (i) the ratio of Total Liabilities (after deducting cash and cash equivalents) to Market Value Adjusted Total Assets (after deducting cash and cash equivalents) not to exceed 0.75 to 1.00; (ii) minimum liquidity of the greater of $30,000 or 3% of the total debt of the Company, (iii) the ratio of EBITDA to net interest expense not to be less than 2.50 to 1.00, (iv) Market Value Adjusted Net Worth, defined as the amount by which the Market Value Adjusted Total Assets exceed the Total Liabilities, to exceed $500,000 and (v) the ratio of net funded debt to total net assets ratio not to exceed 80% on a charter inclusive valuation basis. The Company's other term loans described under Note 11.2 below also contain financial covenants that are either equal to or less stringent than the foregoing financial covenants.
	2. Term loans:
	1. In May 2008, Costis Maritime Corporation and Christos Maritime Corporation entered into a loan agreement with a bank for an amount of up to $150,000 in the aggregate ($75,000 each) on a joint and several basis in order to partly finance the acquisition cost of the vessels Sealand New York and Sealand Washington. As at December 31, 2013, the outstanding balance of the loan of $100,500 is repayable in 9 equal semi-annual installments of $4,500, each from May 2014 to May 2018 and a balloon payment of $60,000 payable together with the last installment.
	2. In January 2008, Mas Shipping Co. entered into a loan agreement with a bank for an amount of up to $75,000 in order to partly finance the acquisition cost of vessel Maersk Kokura. As at December 31, 2013, the outstanding balance of the loan of $47,000 is repayable in 9 variable semi-annual installments from February 2014 to February 2018 and a balloon payment of $10,000 payable together with the last installment.
	3. In December 2007, Montes Shipping Co. and Kelsen Shipping Co. entered into a loan agreement with a bank for an amount of up to $150,000 in the aggregate ($75,000 each) on a joint and several basis in order to partly finance the acquisition cost of the vessels Maersk Kawasaki and Maersk Kure. As at December 31, 2013, the outstanding balance of the loan of $90,000 is repayable in 8 equal semi-annual installments of $6,000 each from June 2014 to December 2017 and a balloon payment of $42,000 payable together with the last installment.
	4. In June 2006, Marathos Shipping Inc. entered into a loan agreement with a bank for an amount of up to $24,800, in order to partly finance the acquisition cost of the vessel MSC Mandraki (ex. Maersk Mandraki). The loan was fully repaid on November 16, 2012.
	5. In June 2006, Capetanissa Maritime Corporation entered into a loan agreement with a bank for an amount of up to $90,000, in order to partly finance the acquisition cost of the vessel Cosco Beijing. As at December 31, 2013, the outstanding balance of the loan of $55,000 is repayable in 10 equal semi-annual installments of $2,500 each from February 2014 to August 2018 and a balloon payment of $30,000 payable together with the last installment.
	6. In February 2006, Rena Maritime Corporation entered into a loan agreement with a bank for an amount of up to $90,000 in order to partly finance the acquisition cost of the vessel Cosco Guangzhou. As at December 31, 2013, the outstanding balance of the loan of $52,500 is repayable in 9 equal semi-annual installments of $2,500 each from February 2014 to February 2018 and a balloon payment of $30,000 payable together with the last installment.
	7. In February 2005, Bullow Investments Inc. entered into a loan agreement with a bank for an amount of up to $31,000 in order to partly finance the acquisition cost of the vessel MSC Mykonos (ex. Maersk Mykonos). The loan was fully repaid on November 16, 2012.
	8. In December 2009, Merin Shipping Co., Lytton Shipping Co., Venor Shipping Co. and Volk Shipping Co. entered into a loan agreement with a bank for an amount of up to $30,000 in order to partly finance the acquisition cost of the vessels Gather, Garden, Genius I and Gifted. Following the sale of Garden in December 2011, the Company repaid the amount of $2,921 and following the sale of Gather (Note 7) in March 2012, the Company repaid the amount of $3,479. In May 2012 the Company repaid the remaining balance of the loan, amounting to $6,958, following the sale of Gifted and Genius I (Note 7).
	9. On November 19, 2010, Costamare entered into a term loan agreement with a consortium of banks for an amount of up to $120,000, which was available for drawing for a period up to 18 months. As of December 31, 2013, the Company has drawn the amount of $38,500 (tranche a), the amount of $42,000 (tranche b), the amount of $21,000 (tranche c), the amount of $7,470 (tranche d) and the amount of $7,470 (tranche e) under this term loan agreement in order to finance part of the acquisition cost of MSC Romanos, MSC Methoni, MSC Ulsan, Koroni and Kyparissia, respectively. As at December 31, 2013, the outstanding balance of the tranche (a) of the loan of $29,837.5 is repayable in 23 equal quarterly installments of $962.5 from February 2014 to August 2019 and a balloon payment of $7,700 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (b) of the loan of $33,600 is repayable in 24 equal quarterly installments of $1,050 from January 2014 to October 2019 and a balloon payment of $8,400 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (c) of the loan of $17,325 is repayable in 25 equal quarterly installments of $525 from February 2014 to February 2020 and a balloon payment of $4,200 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (d) of the loan of $4,668.8 is repayable in 6 equal quarterly installments of $466.9 from February 2014 to May 2015 and a balloon payment of $1,867.4 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (e) of the loan of $4,668.8 is repayable in 6 equal quarterly installments of $466.9 from February 2014 to May 2015 and a balloon payment of $1,867.4 payable together with the last installment.
	10. On January 14, 2011, Adele Shipping Co., Bastian Shipping Co. and Cadence Shipping Co., wholly-owned subsidiaries of Costamare, concluded a credit facility with a consortium of banks, as joint-and-several borrowers, for an amount of up to $203,343 to finance part of the acquisition and construction cost of Hulls H1068A, H1069A and H1070A (Note 6). The drawdown of the facility will be made in three tranches, one for each hull. The credit facility is repayable in forty consecutive quarterly installments, the first thirty-nine (1-39) in the amount of $1,412 per tranche each, and a final (fortieth) installment of $12,713 per tranche. As of December 31, 2013, the Company has drawn the amount of $48,765 (tranche (a) - H1068A) (Note 21), $48,765 (tranche (b) - H1069A) and $48,765 (tranche (c) - H1070A), in order to partly refinance the second installment and fully finance the third and fourth pre-delivery installment of hulls H1068A, H1069A and H1070A.
	11. On April 7, 2011, Costamare, as borrower, concluded a credit facility with a bank, for an amount up to the lesser of $140,000 and 70% of the contract price of the vessels, to finance part of the acquisition and construction cost of Hulls S4010 and S4011 (Note 6). In April 2011, the Company drew down the amount of $26,740 in order to partly refinance the first pre-delivery installment of Hulls S4010 and S4011. During the year ended December 31, 2012, the Company drew down the amount of $26,740, in aggregate, in order to partly finance the second and third pre-delivery installments of Hulls S4010 and S4011. Furthermore, during the year ended December 31, 2013, the Company drew down in aggregate the amount of $80,220, in order to partly finance the final installments of Hulls S4010 (MSC Athens), which was delivered to the Company on March 14, 2013 and S4011 (MSC Athos), which was delivered to the Company on April 8, 2013. As at December 31, 2013, the outstanding balance of the loan of $129,243 is repayable in 15 equal semi-annual installments of $4,456.7 from January 2014 until January 2021 and a balloon payment of $62,392.5 payable together with the last installment.
	12. On August 16, 2011, Undine Shipping Co., Quentin Shipping Co. and Sander Shipping Co., wholly-owned subsidiaries of Costamare concluded a credit facility with a consortium of banks, as joint-and-several borrowers, for an amount of up to $229,200 to finance part of the acquisition and construction cost of Hulls S4020, S4022 and S4024 (Note 6). The drawdown of the facility will be made in three tranches, one for each Hull. On August 26, 2011, the Company drew down an amount of $22,920 in order to partly refinance the first pre-delivery installment of Hulls S4020, S4022 and S4024. During the year ended December 31, 2012, the Company drew down in aggregate the amount of $38,200 in order to partly finance the second and the third pre-delivery installments of Hulls S4020, S4022 and S4024. Furthermore, during the year ended December 31, 2013, the Company drew down in aggregate the amount of $168,080 in order to partly finance the third pre-delivery and the delivery final installments of Hulls S4020 (Valor), S4022 (Valiant) and S4024 (Vantage), which were delivered to the Company on June 3, 2013, August 5, 2013 and November 8, 2013, respectively. As at December 31, 2013, the outstanding balance of the tranche (a) of $73,853.2 relating to Hull S4020 (Valor), is repayable in 26 equal quarterly installments of $1,273.4 from January 2014 to April 2020 and a balloon payment of $40,744.8 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (b) of $73,853.3 relating to Hull S4022 (Valiant), is repayable in 26 equal quarterly installments of $1,273.4 from March 2014 to June 2020 and a balloon payment of $40,744.9 payable together with the last installment. As at December 31, 2013, the outstanding balance of the tranche (c) of $76,400 relating to Hull S4024 (Vantage) is repayable in 28 equal quarterly installments of $1,273.4 and a balloon payment payable together with the last installment of $40,744.8 from February 2014 to November 2020.
	13. On October 12, 2011, Raymond Shipping Co. and Terance Shipping Co. wholly-owned subsidiaries of the Company concluded a credit facility with a bank, as joint and several borrowers, for an amount of up to $152,800 to finance part of the construction and acquisition cost of Hulls S4021 and S4023 (Note 6). On October 25, 2011, the Company drew down an amount of $15,280 in order to partly refinance the first pre-delivery installment of Hulls S4021 and S4023. During the year ended December 31, 2012, the Company drew down in aggregate the amount of $30,560 in order to partly finance the second and third pre-delivery installments of Hulls S4021 and S4023. Furthermore, during the year ended December 31, 2013 the Company drew down in the aggregate the amount $106,960 in order to partly finance the final installments of Hulls S4021 (Value) and S4023 (Valence), which vessels were delivered to the Company on June 25, 2013, and September 2, 2013, respectively. As at December 31, 2013, the outstanding balance of the tranche (a) of $73,671.4 relating to Hull S4021 (Value), is repayable in 26 equal quarterly installments of $1,364.3 from March 2014 to June 2020 and a balloon payment of $38,199.6 payable together with the last installment. As at December 31, 2013, the tranche (b) of the loan of $75,035.7 relating to Hull S4023 (Valence) and is repayable in 27 equal quarterly installments of $1,364.3 from February 2014 to August 2020 and a balloon payment of $38,199.6 payable together with the last installment.
	14. On October 6, 2011, the Company concluded a loan facility with a bank for an amount of up to $120,000, in order to partly finance the aggregate market value of eleven vessels in its fleet. In March 2012, the Company drew the amount of $113,700. Furthermore, on June 29, 2012, the Company entered into a supplemental agreement for a further amount of $11,300 to finance the acquisition of the vessel Stadt Luebeck which was drawn down in August 2012 upon the delivery of the vessel. As at December 31, 2013, the outstanding balance of $108,350 is repayable in 20 quarterly variable consecutive installments from March 2014 to December 2018 and a balloon payment of $47,850 payable together with the last installment.
	The term loans discussed above 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 restrictions in dividend payments if an event of default has occurred and is continuing or would occur as a result of the payment of such dividend.
	The annual principal payments required to be made after December 31, 2013, are as follows:



	Year ending			Amount
	December 31,
	2014			206,717
	2015			211,445
	2016			201,343
	2017			243,343
	2018			582,390
2019 and thereafter			422,338
			1,867,576




The interest rates of Costamare's long-term debt at December 31, 2011, 2012 and 2013, were in the range of 1.21%-6.75%, 2.71%-6.75% and 1.25%-6.75%, respectively. The weighted average interest rate as at December 31, 2011, 2012 and 2013, was 4.8%, 4.4% and 4.3%, respectively.

Total interest expense incurred on long-term debt (including the effect of the interest rate swaps discussed in Note 16) for 2011, 2012 and 2013, amounted to $73,597, $76,831 and $81,471, respectively and is included in Interest and finance costs in the accompanying consolidated statements of income. Of the above amount incurred in 2011, $5,525 was capitalized and is included (a) in Advances for vessel acquisitions ($2,773) and (b) in the statement of comprehensive income / (loss) ($2,752), representing net settlements on interest rate swaps qualifying for cash flow hedge. Of the above amount incurred in 2012, $8,476 was capitalized and is included (a) in Advances for vessel acquisitions ($5,280) in the accompanying 2012 consolidated balance sheet and (b) in the statement of comprehensive income/ (loss) ($3,196), representing net settlements on interest rate swaps qualifying for cash flow hedge. Of the above amount incurred in 2013, $11,098 was capitalized and is included (a) in Advances for vessel acquisitions ($7,845) in the accompanying 2013 consolidated balance sheet and (b) in the statement of comprehensive income / (loss) ($3,253), representing net settlements on interest rate swaps qualifying for cash flow hedge.

Accrued_Charter_Revenue_and_Un

Accrued Charter Revenue and Unearned Revenue	12 Months Ended
Accrued Charter Revenue and Unearned Revenue	Dec. 31, 2013
Accrued Charter Revenue and Unearned Revenue Disclosure [Abstract]	'
Accrued Charter Revenue, Current and Non-Current and Unearned Revenue, Current and Non-Current [Text Block]	'

	12. Accrued Charter Revenue, Current and Non-Current and Unearned Revenue, Current and Non-Current:
	(a) Accrued charter revenue, Current and Non-Current: The amounts presented as current and non-current accrued charter revenue in the accompanying consolidated balance sheets as of December 31, 2012 and 2013, reflect revenue earned, but not collected, resulting from charter agreements providing for varying annual charter rates over their term, which were accounted for on a straight-line basis at their average rates. As at December 31, 2012, the net accrued charter revenue totaling to $288 is comprised of $5,100 separately reflected in Current assets, $13,422 separately reflected in Non-current assets, and $18,234 (discussed in (b) below) included in Unearned revenue in current and non-current liabilities in the accompanying 2012 consolidated balance sheet. As at December 31, 2013, the net accrued charter revenue, reduced by the allowance for doubtful amounts of $2,208, totaling to ($16,896) is comprised of $409 separately reflected in Current assets, $10,264 separately reflected in Non-current assets, and $27,569 (discussed in (b) below) included in Unearned revenue in current and non-current liabilities in the accompanying 2013 consolidated balance sheet. The maturities of the net accrued charter revenue as of December 31 of each year is as follows:



	Year ending	Amount
	December 31,	Amount
	2014	(1,996	)
	2015	(4,425	)
	2016	(9,431	)
	2017	(9,639	)
	2018	(237	)
	2019 and thereafter	8,832
		-16,896


	(b) Unearned Revenue, Current and Non-Current: The amounts presented as current and non-current unearned revenue in the accompanying consolidated balance sheets as of December 31, 2012 and 2013, reflect (a) cash received prior to the balance sheet date for which all criteria to recognize as revenue have not been met and, (b) any unearned revenue resulting from charter agreements providing for varying annual charter rates over their term, which were accounted for on a straight-line basis at their average rate.



		2012		2013
	Hires collected in advance	4,002		7,196
	Charter revenue resulting from varying charter rates	18,234		27,569
	Total	22,236		34,765
	Less current portion	(5,595	)	(9,601	)
	Non-current portion	16,641		25,164

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]:	'
Commitments and Contingencies [Text Block]	'

	13. Commitments and Contingencies:

	1. Long-term time charters: As at December 31, 2013, the Company has entered into time charter arrangements on all of its vessels in operation, including the three hulls under construction, with the exception of vessel Konstantina, with international liner operators. These arrangements as at December 31, 2013, have remaining terms of up to 121 months (including the time charter agreements for vessels under construction as at December 31, 2013). As of the same date, future minimum contractual charter revenues assuming 365 revenue days per annum per vessel and the earliest redelivery dates possible, based on vessels' committed, non-cancelable, long-term time charter contracts, are as follows:



		Amount

	Year ending
	December 31,
	2014		468,546
	2015		446,855
	2016		417,343
	2017		371,709
	2018		198,759
	2019 and thereafter		429,611
		2,332,823



	(b) As at December 31, 2013, as further disclosed in Note 6, the Company has entered into three shipbuilding contracts for the construction and acquisition of three newbuild vessels. The total aggregate price for all three newbuild vessels is $285,240, payable in installments until their deliveries. The remaining balance as of December 31, 2013 of $57,048 is payable in 2014.

	Furthermore, pursuant to the Framework Agreement the Company has a contractual commitment of approximately $120,977 representing 49% of the remaining construction cost of two vessels under construction and 25% of the construction cost of two vessels under construction (Note 10).
	(c) Other: Various claims, suits, and complaints, including those involving government regulations and product liability, arise in the ordinary course of the shipping business. In addition, losses may arise from disputes with charterers, agents, insurance and other claims with suppliers relating to the operations of the Company's vessels. Currently, management is not aware of any such claims not covered by insurance or contingent liabilities, which should be disclosed, or for which a provision has not been established in the accompanying consolidated financial statements. One of the Company's charterers, Zim Integrated Shipping Services (“ZIM”), is engaged in ongoing discussions with its creditors, including vessel and container lenders, ship-owners, shipyards, unsecured lenders and bond holders, to restructure its debt. Costamare is participating in these discussions which could result in concessions or modification to the existing charter arrangements with ZIM or could result in Costamare taking remedial actions under the charter agreements with ZIM.
	The Company accrues for the cost of environmental liabilities when management becomes aware that a liability is probable and is able to reasonably estimate the probable exposure. Currently, management is not aware of any other claims or contingent liabilities which should be disclosed or for which a provision should be established in the accompanying consolidated financial statements. The Company is covered for liabilities associated with the individual vessels' actions to the maximum limits as provided by Protection and Indemnity (P&I) Clubs, members of the International Group of P&I Clubs.

Common_Stock_Preferred_stock_a

Common Stock, Preferred stock and Additional Paid-In Capital	12 Months Ended
	Dec. 31, 2013
Stockholders Equity Note [Abstract]:	'
Common Stock, Preferred stock and additional paid-in Capital [Text Block]	'

	14. Common Stock, Preferred Stock and Additional Paid-In Capital:
	(a) Common Stock: From inception through July 11, 2010, the authorized common stock of Costamare consisted of 2,000,000 shares with a par value of $0.0001 per share out of which 1,000,000 shares were issued to the Family. On July 12, 2010, the Company's articles of incorporation were amended. Under the amended articles of incorporation, the Company's authorized capital stock consists of 1,000,000,000 shares of common stock, par value $0.0001 per share and 100,000,000 preferred shares, par value $0.0001 per share of which no shares were issued. Of these preferred shares, 10,000,000 shares have been designated Series A Participating Preferred Stock in connection with the adoption of a stockholder rights plan. All shares of stock are in registered form.
	On July 20, 2010, pursuant to a rights offering authorized by the Board of Directors on July 14, 2010, the Company issued 24,000,000 shares of common stock in exchange of $2,400, increasing the issued share capital of the Company to 25,000,000 shares of common stock.
	On October 19, 2010, within the context of the Initial Public Offering completed in November 2010, the Company effected a dividend of 0.88 shares for each share of common stock outstanding on the record date of August 27, 2010 (the “Stock Split”). As a result of this dividend, the Company issued 22,000,000 additional shares in respect of its 25,000,000 shares of the then outstanding common stock.
	On November 4, 2010, the Company completed its Initial Public Offering in the United States under the Securities Act. In this respect 13,300,000 common shares at par value $0.0001 were issued at a public offering price of $12.00 per share, increasing the issued share capital to 60,300,000 shares. The net proceeds of the Initial Public Offering were $145,543.
	On March 27, 2012, the Company completed a follow-on public equity offering in the United States under the Securities Act. In this respect 7,500,000 shares at par value $0.0001 were issued at a public offering price of $14.10 per share, increasing the issued share capital to 67,800,000 shares. The net proceeds of the follow-on offering were $100,584.
	On October 19, 2012, the Company completed a follow-on public equity offering in the United States under the Securities Act. In this respect 7,000,000 shares at par value $0.0001 were issued at a public offering price of $14.00 per share, increasing the issued share capital to 74,800,000 shares. The net proceeds of the follow-on offering were $93,547.
	(b) Preferred Stock: On August 7, 2013, the Company issued 2,000,000, Series B Cumulative Redeemable Perpetual Preferred Stock (the “Series B Preferred Stock”) in the United States under the Securities Act, which pay dividends of 7.625% per annum in arrears on a quarterly basis (equal to $1.90625 per annum per share) at $25 per share. At any time after August 6, 2018, the Series B Preferred Stock may be redeemed, at Company's election at a price of $25 of liquidation preference per share. The net proceeds from the offering were $48,042.
	(c) Additional Paid-in Capital: The amounts shown in the accompanying consolidated balance sheets, as additional paid-in capital, include (i) payments made by the stockholders at various dates to finance vessel acquisitions in excess of the amounts of bank loans obtained, (ii) advances for working capital purposes and (iii) the difference between the par value of the shares issued in the Initial Public Offering in November 2010 and the offerings in March 2012, October 2012 and August 2013 and the net proceeds obtained for those shares.
	(d) Dividends paid: During the year ended December 31, 2012, the Company declared and paid to its common stockholders, (i) the amount of $16,281 or $0.27 per common share for the fourth quarter of 2011, (ii) the amount of $18,306 or $0.27 per common share for the first quarter of 2012 and (iii) the amount of $18,306 or $0.27 per common share for the second quarter of 2012 and (iv) the amount of $20,196 or $0.27 per common share for the third quarter of 2012. During the year ended December 31, 2013, the Company declared and paid to its common stockholders, (i) the amount of $20,196 or $0.27 per common share for the fourth quarter of 2012, (ii) the amount of $20,196 or $0.27 per common share for the first quarter of 2013, (iii) the amount of $20,196 or $0.27 per common share for the second quarter of 2013 and (iv) the amount of $20,196 or $0.27 per common share for the third quarter of 2013. During the year ended December 31, 2013, the Company declared and paid to its holders of Series B Preferred Stock, the amount of $731 or $0.3654 per share for the period from August 6, 2013 to October 14, 2013.

Earnings_Loss_per_share

Earnings/ (Loss) per share	12 Months Ended
	Dec. 31, 2013
Earnings per share, Basic [Abstract]:	'
Earnings per share [Text Block]	'

	15. Earnings / (Loss) per share (EPS)

	All common shares issued are Costamare Inc. common stock and have equal rights to vote and participate in dividends. In August 2013, the Company issued Series B Preferred Stock, receiving an annual dividend of 7.625% in arrears on the 15th day of January, April, July and October of each year. Profit or loss attributable to common equity holders is adjusted by the contractual amount of dividends on Series B Preferred Stock that should be paid for the period. Dividends paid and accrued on Series B Preferred Stock during the years ended December 31, 2011, 2012 and 2013, amounted to nil, nil and $1,536, respectively.




			2011		2012			2013
			Basic EPS		Basic EPS		Basic EPS
	Net income	$	87,592	$	81,129	$	103,087
	Less paid and accrued earnings allocated to Preferred Stock				-		(1,536		)

			-
	Net income available to common stockholders				81,129		101,551
			87,592

	Weighted average number of common shares, basic				67,612,842		74,800,000
			60,300,000

	Earnings per common share	$	1.45	$	1.20	$	1.36

Interest_and_Finance_Costs

Interest and Finance Costs	12 Months Ended
Interest and Finance Costs	Dec. 31, 2013
Interest and Finance Costs [Abstract]:	'
Interest and Finance Costs [Text Block]	'

	16. Interest and Finance Costs:
	The amounts in the accompanying consolidated statements of income are analyzed as follows:



		2011		2012		2013
	Interest expense	21,218		28,485		33,018
	Interest capitalized	(5,525	)	(8,476	)	(11,098	)
	Swap effect	52,379		48,346		48,453
	Amortization and write-off of financing costs			1,157		1,569
	Amortization and write-off of financing costs	2,747		1,157		1,569
	Commitment fees	4,369		4,921		2,283
	Bank charges and other	253		301		308
		75,441		74,734		74,533

Taxes

Taxes	12 Months Ended
Taxes	Dec. 31, 2013
Income Tax Disclosure [Abstract]:	'
Taxes [Text Block]	'

	17. Taxes:
	Under the laws of the countries of the companies' incorporation and/or vessels' registration, the companies are not subject to tax on international shipping income; however, they are subject to registration and tonnage taxes, which are included in Vessel operating expenses in the accompanying consolidated statements of income.
	The vessel owning companies with vessels that have called on the United States during the relevant year of operation are obliged to file tax returns with the Internal Revenue Service. The applicable tax is 50% of 4% of U.S. related gross transportation income unless an exemption applies. Management believes that based on current legislation the relevant vessel owning companies are entitled to an exemption because they satisfy the relevant requirements, namely that (i) the related vessel owning companies are incorporated in a jurisdiction granting an equivalent exemption to U.S. corporations and (ii) over 50% of the ultimate stockholders of the vessel owning companies are residents of a country granting an equivalent exemption to U.S. persons.

Derivatives

Derivatives	12 Months Ended
Derivatives	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]:	'
Derivatives [Text Block]	'

	18. Derivatives:
	(a) Interest rate swaps that meet the criteria for hedge accounting: The Company, according to its long-term strategic plan to maintain stability in its interest rate exposure, has decided to minimize exposure to floating interest rates by entering into interest rate swap agreements. To this effect, the Company has entered into interest rate swap transactions with varying start and maturity dates, in order to proactively and efficiently manage its floating rate exposure.
	These interest rate swaps are designed to hedge the variability of interest cash flows arising from floating rate debt, attributable to movements in three-month or six-month USD LIBOR. According to the Company's Risk Management Accounting Policy, after putting in place the formal documentation required by ASC 815 in order to designate these swaps as hedging instruments as from their inception, these interest rate swaps qualified for hedge accounting. Accordingly, since that time, only hedge ineffectiveness amounts arising from the differences in the change in fair value of the hedging instrument and the hedged item are recognized in the Company's earnings. Assessment and measurement of prospective and retrospective effectiveness for these interest rate swaps are being performed on a quarterly basis. For qualifying cash flow hedges, the fair value gain or loss associated with the effective portion of the cash flow hedge is recognized initially in stockholders' equity and recognized to the consolidated statement of income in the periods when the hedged item affects profit or loss. Any ineffective portion of the gain or loss on the hedging instrument is recognized in the consolidated statement of income immediately.
	The interest rate swap agreements designed as hedging instruments, as of December 31, 2012 and 2013, were as follows:



	Effective			Termination		Notional		Fixed rate		Floating rate		Fair		Fair
	date			date		amount		(Costamare		(Costamare		value		value Dec. 31,
						on		pays)		receives)		Dec. 31,		2013
						effective						2012
						date
	30/6/2008			30/6/2015		425,000		4.03%p.a.		USD LIBOR 3M BBA		(18,407	)	(8,916	)
	30/6/2008			30/6/2015		75,000		4.03%p.a.		USD LIBOR 3M BBA		(3,248	)	(1,573	)
	30/9/2008			30/6/2015		100,000		4.09%p.a.		USD LIBOR 3M BBA		(4,403	)	(2,132	)
	30/9/2008			30/6/2015		250,000		4.02%p.a.		USD LIBOR 3M BBA		(10,775	)	(5,231	)
	16/5/2008			16/5/2014		75,000		3.88%p.a.		USD LIBOR 6M BBA		(2,671	)	(880	)
	16/5/2008			16/5/2014		75,000		3.88%p.a.		USD LIBOR 6M BBA		(2,671	)	(880	)
	17/6/2008			17/6/2013		73,000		3.57%p.a.		USD LIBOR 6M BBA		(787	)	-
	17/6/2008			17/6/2013		73,000		3.57%p.a.		USD LIBOR 6M BBA		(787	)	-
	21/2/2007			21/2/2017		85,000		Zero cost Interest rate Collar*				(11,122	)	(7,771	)
	4/8/08			5/8/13		74,000		3.60%p.a.		USD LIBOR 6M BBA		(1,592	)	-
	30/6/2011			29/6/2018		50,000		3.45%p.a.		USD LIBOR 3M BBA		(19,783	)	(12,933	)
	30/9/2011			29/6/2018		20,000		4.05%p.a.		USD LIBOR 3M BBA		(26,075	)	(21,125	)
	28/9/2012			29/6/2018		40,000		3.60%p.a.		USD LIBOR 3M BBA		(5,852	)	(3,737	)
	22/8/2011			22/8/2018		65,000		2.79%p.a.		USD LIBOR 6M BBA		(5,087	)	(3,015	)
	31/1/2013			29/01/2021		133,700		3.51%p.a.		USD LIBOR 6M BBA		(16,672	)	(9,981	)
	15/1/2014 (**)			15/1/2021		67,781		2.94%p.a.		USD LIBOR 3M BBA		(4,931	)	(2,603	)
	15/2/2014			15/2/2021		67,781		2.99%p.a.		USD LIBOR 3M BBA		(4,990	)	(2,595	)
	15/3/2014			15/3/2021		67,781		3.03%p.a.		USD LIBOR 3M BBA		(5,019	)	(2,555	)
	5/4/13			6/4/20		30,000		2.39%p.a.		USD LIBOR 3M BBA		(1,892	)	(754	)
	17/6/2013			15/6/2020		30,000		2.49%p.a.		USD LIBOR 3M BBA		(1,949	)	(728	)
	15/8/2013			17/8/2020		30,000		2.58%p.a.		USD LIBOR 3M BBA		(2,009	)	(878	)
	15/8/2013			17/8/2020		30,000		2.41%p.a.		USD LIBOR 3M BBA		(1,751	)	(606	)
	5/4/13			6/4/20		30,000		2.24%p.a.		USD LIBOR 3M BBA		(1,684	)	(522	)
	17/6/2013			15/6/2020		30,000		2.32%p.a.		USD LIBOR 3M BBA		(1,703	)	(467	)
	15/8/2013			17/8/2020		16,400		2.46%p.a.		USD LIBOR 3M BBA		(1,050	)	(374	)
	17/6/2013			15/6/2020		16,400		2.38%p.a.		USD LIBOR 3M BBA		(1,030	)	(304	)
	5/4/13			6/4/20		16,400		2.29%p.a.		USD LIBOR 3M BBA		(1,006	)	(325	)
	28/6/2013			23/6/2020		76,400		1.53%p.a.		USD LIBOR 3M BBA		-		1,587
	28/8/2013			28/8/2020		76,400		1.60%p.a.		USD LIBOR 3M BBA		-		1,492

										Total fair value		-158,946		-87,806


	* Notional amount $85,000 amortizing zero-cost collar (2.23%-6.00%) with knock-in floor sold at 2.23% and struck at 6.00%, as a 10-year forward hedge, covering the period from February 2007 to February 2017. The agreement guarantees that the interest rate payable on the Company's loans throughout the 10-year period will always remain between 2.23% and 6.00% excluding margin.
	** This swap was terminated on January 14, 2014 (Note 21(d)).



	The interest rate swaps included in the table above are designated for the Credit Facility discussed in Note 11 and the term loans discussed in Notes 11.2.1, 11.2.5, 11.2.6, 11.2.10, 11.2.11, 11.2.12, and 11.2.13.
	In the years ended December 31, 2011, 2012 and 2013, the realized ineffectiveness on the interest rate swaps discussed under (a) above was nil, nil and a gain of $254, respectively, and is included in Gain / (Loss) on derivative instruments in the accompanying 2013 consolidated statement of income.
	(b) Interest rate swaps that do not meet the criteria for hedge accounting: As of both December 31, 2012 and 2013, the Company had outstanding one interest rate swap agreement for the purpose of managing risks associated with the variability of changing LIBOR-related interest rates. Such agreement did not meet hedge accounting criteria and, therefore, changes in its fair value are reflected in earnings. More specifically, the swap has a notional amount $100,000 non-amortizing zero-cost collar (1.37%-6.00%) with a knock-in floor sold at 1.37% and struck at 6.00%, as a nine-year forward hedge, covering the period from September 2008 to March 2017. At December 31, 2012 and 2013, the fair value of this swap was a liability of $21,865 and $15,406, respectively and is included in Fair value of derivatives in the accompanying consolidated balance sheets.
	(c) Foreign currency agreements: As of December 31, 2013, the Company had no outstanding Euro/USD foreign currency agreements.
	As of December 31, 2012, the Company was engaged in two Euro/U.S. dollar forward agreements totaling $5,000 at an average forward rate of Euro/U.S. dollar 1.280 expiring in monthly intervals up to February 2013.
	As of December 31, 2011, the Company was engaged in sixteen Euro/U.S. dollar contracts totaling $25,000 at an average forward rate of Euro/U.S. dollar 1.3422 expiring in monthly intervals in 2012.
	The total fair value adjustment of forward contracts for the year ended December 31, 2013, was a loss of $165, for the year ended December 31, 2012, was a gain of $1,149 and for the year ended December 31, 2011, was a loss of $1,442 and are included in Gain / (Loss) on derivative instruments in the accompanying consolidated statements of income.




				The Effect of Derivative Instruments for the years ended December 31, 2011, 2012 and 2013

									Derivatives in ASC 815 Cash Flow Hedging Relationships
															Location of Gain / (Loss) Recognized in Income on Derivative (Ineffective Portion)

	Amount of Gain / (Loss) Recognized in Accumulated OCI on Derivative															Amount of Gain / (Loss)
	(Effective Portion)															Recognized in Income on
																Derivative
																(Ineffective Portion)
	2011		2012				2013										2011	2012	2013
Interest rate swaps	(102,262	)	(51,386	)			27,964								Gain / (Loss) on derivative instruments		-	-	254

Reclassification to interest and finance costs
	46,780		42,877				42,922
Total	-55,482		-8,509				70,886										-	-	254




















Derivatives Not Designated as Hedging Instruments
under ASC 815
	Location of Gain / (Loss)				Amount of Gain / (Loss)
	Recognized on				Recognized in Income
	Derivative				on Derivative
							2011		2012		2013
Interest rate swaps	Gain / (Loss) on derivative instruments						(7,267	)	(1,611	)	6,459
Realized ineffectiveness	Gain / (Loss) on derivative instruments						-		-		254
Forward contracts	Gain / (Loss) on derivative instruments
Forward contracts	Gain / (Loss) on derivative instruments						-1,442		1,149		-165
Total							-8,709		-462		6,548

Financial_Instruments

Financial Instruments

12 Months Ended

Dec. 31, 2013

Fair Value Disclosure [Abstract]:

Financial Instruments [Text Block]

19. Financial Instruments:

(a) Interest rate risk: The Company's interest rates and loan repayment terms are described in Note 11.

(b) Concentration of credit risk: Financial instruments consist principally of cash, trade accounts receivable, investments and derivatives. The Company places its temporary cash investments, consisting mostly of deposits, primarily with high credit rated financial institutions. The Company performs periodic evaluations of the relative credit standing of those financial institutions that are considered in the Company's investment strategy. The Company limits its credit risk with accounts receivable by performing ongoing credit evaluations of its customers' financial condition and generally does not require collateral for its accounts receivable and does not have any agreements to mitigate credit risk. The Company limits the exposure of non-performance by counterparties to derivative instruments by diversifying among counterparties with high credit ratings and performing periodic evaluations of the relative credit standing of the counterparties.

(c) Fair value: The carrying amounts reflected in the accompanying consolidated balance sheet of financial assets and accounts payable approximate their respective fair values due to the short maturity of these instruments. The fair value of long-term bank loans with variable interest rates approximate the recorded values, generally due to their variable interest rates. The fair value of the interest rate swap agreements discussed in Note 18 above are determined through Level 2 of the fair value hierarchy as defined in FASB guidance for Fair Value Measurements and are derived principally from or corroborated by observable market data, interest rates, yield curves and other items that allow value to be determined.

The fair value of the interest rate swap agreements discussed in Note 18(a) and (b) equates to the amount that would be paid by the Company to cancel the agreements. As at December 31, 2012 and 2013, the fair value of these interest rate swaps in aggregate amounted to a liability of $180,811 and $103,212, respectively.

The fair market value of the forward contracts discussed in Note 18(c) determined through Level 2 of the fair value hierarchy as at December 31, 2012 and 2013, amounted to an asset of $165 and nil, respectively.

The following tables summarize the hierarchy for determining and disclosing the fair value of assets and liabilities by valuation technique on a recurring basis as of the valuation date.

December 31,

Quoted Prices in

Significant

Unobservable

2012

Active Markets for

Other

Inputs

Identical Assets

Observable

(Level 3)

(Level 1)

Inputs

(Level 2)

Recurring measurements:

Forward contracts—asset position

165

Interest rate swaps—liability position

(180,811

)

(180,811

)

Total

-180,646

December 31,

Quoted Prices in

Significant

Unobservable

2013

Active Markets for

Other

Inputs

Identical Assets

Observable

(Level 3)

(Level 1)

Inputs

(Level 2)

Recurring measurements:

Forward contracts—asset position

Interest rate swaps—liability position

(103,212

)

(103,212

)

Total

-103,212

Comprehensive_Income_Loss

Comprehensive Income (Loss)	12 Months Ended
Comprehensive Income (Loss)	Dec. 31, 2013
Comprehensive Income (Loss) Disclosure [Abstract]	'
Comprehensive income (loss) [Text Block]	'

	20. Comprehensive Income / (Loss):
	During the year ended December 31, 2011, Other comprehensive income / (loss) decreased with net losses of $58,242 relating to (i) the change of the fair value of derivatives that qualify for hedge accounting (loss of $102,262), net of the settlements to net income of derivatives that qualify for hedge accounting (gain of $46,780), (ii) the reclassification adjustment for gain / (loss) on available for sale securities in net income ($8) and (iii) the Net settlements on interest rate swaps qualifying for cash flow hedge ($2,752). During the year ended December 31, 2012, Other comprehensive income / (loss) decreased with net losses of $11,705 relating to (i) the change of the fair value of derivatives that qualify for hedge accounting (loss of $51,386), net of the settlements to net income of derivatives that qualify for hedge accounting (gain of $42,877) and (ii) the Net settlements on interest rate swaps qualifying for cash flow hedge ($3,196). During the year ended December 31, 2013, Other comprehensive income / (loss) increased with net gains of $67,688 relating to (i) the change of the fair value of derivatives that qualify for hedge accounting (gain of $27,964), net of the settlements to net income of derivatives that qualify for hedge accounting (gain of $42,922), (ii) the Net settlements on interest rate swaps qualifying for cash flow hedge ($3,253) and (iii) the amounts reclassified from Net settlements on interest rate swaps qualifying for hedge accounting to depreciation ($55). As at December 31, 2011, 2012 and 2013, Comprehensive income / (loss) amounted to $29,350, $69,424 and $170,775, respectively.

Subsequent_Events

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2013
Subsequent Events [Abstract]:	'
Subsequent Events [Text Block]	'

	21. Subsequent Events:

	(a) Declaration and payment of Dividends (preferred stock): On January 2, 2014, the Company declared a cash dividend of $0.476563 per share on its 7.625% Series B Preferred Stock for the period from October 15, 2013, to January 14, 2014. The dividend was paid on January 15, 2014, to all Series B Preferred Stock holders of record as of January 14, 2014.

	(b) Declaration and payment of Dividends (common stock): On January 6, 2014, the Company declared a dividend of $0.27 per share for the fourth quarter ended December 31, 2013, which was paid on February 4, 2014, to stockholders of record at the close of trading of the Company's common stock on the New York Stock Exchange on January 21, 2014.

	(c) *Sale and leaseback transaction:* On January 14, 2014, the Company took delivery of the vessel MSC Azov (Hull H1068A) (Note 6). At the same time, the Company agreed with a financial institution to refinance the then outstanding balance of the loan relating to MSC Azov (Hull H1068A) (Note 11.2.10), under a ten-year sale and leaseback transaction. Under the sale and leaseback transaction, the vessel MSC Azov (Hull H1068A) was chartered back on a bareboat basis to Adele Shipping Co., wholly-owned subsidiary of the Company and remained on time charter with its initial time charterer.

	(d) Swap termination: On January 14, 2014, the Company following the sale and leaseback transaction described in (c) above terminated an interest rate swap (Note 18(a)) and paid the amount of $3,021.

	(e) *Follow-on offering:* On January 21, 2014, the Company completed a public offering of 4,000,000 shares of its 8.50% Series C Cumulative Redeemable Perpetual Preferred Stock (the “Series C Preferred Stock”). The net proceeds from the offering were $96,440.

	(f) Investments in Affiliates: During January 2014, pursuant to the Framework Agreement, Costamare Ventures invested in the equity of certain affiliated companies (i) the amount of $17,613 related to the predelivery installments to shipyards for the construction of vessels and (ii) the amount of $6,669 for a swaption agreement.

Significant_Accounting_Policie1

Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2013
Significant Accounting Policies [Abstract]:	'
Principles of consolidation	'
	(a) Principles of Consolidation: The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements include the accounts of Costamare and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation.
	Costamare as the holding company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity. Under Accounting Standards Codification (“ASC”) 810 “Consolidation,” (formerly Accounting Research Bulletin (“ARB”) No. 51) a voting interest entity is an entity in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make financial and operating decisions. Costamare consolidates voting interest entities in which it owns all, or at least a majority (generally, greater than 50%), of the voting interest. Variable interest entities (“VIE”) are entities as defined under ASC 810-10, that in general either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. A controlling financial interest in a VIE is present when a company absorbs a majority of an entity's expected losses, receives a majority of an entity's expected residual returns, or both. The company with a controlling financial interest, known as the primary beneficiary, is required to consolidate the VIE. The Company evaluates all arrangements that may include a variable interest in an entity to determine if it may be the primary beneficiary, and would be required to include assets, liabilities and operations of a VIE in its consolidated financial statements. As of December 31, 2012 and 2013 no such interest existed.

Use of estimates	'
	(b) Use of Estimates: The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Comprehensive income (loss)	'
	(c) Comprehensive Income / (Loss): In the statement of comprehensive income, the Company presents the change in equity (net assets) during a period from transactions and other events and circumstances from non-owner sources. It includes all changes in equity during a period except those resulting from investments by shareholders and distributions to shareholders. The Company follows the provisions of ASC 220 “Comprehensive Income”, and presents items of net income, items of other comprehensive income (“OCI”) and total comprehensive income in two separate but consecutive statements. Reclassification adjustments between OCI and net income are required to be presented separately on the statement of comprehensive income.

Foreign currency translation	'
	(d) Foreign Currency Translation: The functional currency of the Company is the U.S. dollar because the Company's vessels operate in international shipping markets and, therefore, primarily transact business in U.S. dollars. The Company's books of accounts are maintained in U.S. dollars. Transactions involving other currencies during the year are converted into U.S. dollars using the exchange rates in effect at the time of the transactions. At the balance sheet dates, monetary assets and liabilities, which are denominated in other currencies, are translated into U.S. dollars at the year-end exchange rates. Resulting gains or losses are reflected separately in the accompanying consolidated statements of income.

Cash and cash equivalents	'
	(e) Cash and Cash Equivalents: The Company considers highly liquid investments such as time deposits and certificates of deposit with an original maturity of three months or less to be cash equivalents.

Restricted cash	'
	(f) Restricted Cash: Restricted cash is additional minimum cash deposits required to be maintained with certain banks under the Company's borrowing arrangements. Restricted cash includes bank deposits and deposits in so-called “retention accounts” that are required under the Company's borrowing arrangements which are used to fund the loan installments coming due. The funds can only be used for the purposes of loan repayment.

Receivables	'
	(g) Receivables: The amount shown as receivables, at each balance sheet date, mainly includes receivables from charterers for hire, net of any provision for doubtful accounts. At each balance sheet date, all potentially uncollectible accounts are assessed individually for purposes of determining the appropriate provision for doubtful accounts. The provision established for doubtful accounts as of December 31, 2012 and 2013, is nil and $1,495, respectively.

Inventories	'
	(h) Inventories: Inventories consist of bunkers, lubricants and spare parts (propellers and tail shafts) which are stated at the lower of cost or market on a consistent basis. Cost incurred to bring inventories to their present location and condition is determined by the first in, first out method.

Insurance claim receivables	'
	(i) Insurance Claims Receivable: The Company records insurance claim recoveries for insured losses incurred on damage to fixed assets and for insured crew medical expenses. Insurance claim recoveries are recorded, net of any deductible amounts, at the time the Company's fixed assets suffer insured damages or when crew medical expenses are incurred, recovery is probable under the related insurance policies and the claim is not subject to litigation.

Available for sale securities	'
	(j) Available-for-Sale Securities: Investments consisting of marketable government bonds (see Note 4) are classified as available-for-sale securities and reported at fair value as determined based on quoted market prices. Those investments with maturities of less than one year from the balance sheet date are considered short-term investments. Investments with maturities greater than one year from the balance sheet date are considered long-term investments. Unrealized gains and losses are reported in the statement of comprehensive income, with realized gains and losses recognized upon sale of the security and reported in investment income.

Vessels, net	'
	(k) Vessels, Net: Vessels are stated at cost, which consists of the contract price and any material expenses incurred upon acquisition (initial repairs, improvements and delivery expenses, interest and on-site supervision costs incurred during the construction periods). Subsequent expenditures for conversions and major improvements are also capitalized when they appreciably extend the life, increase the earning capacity or improve the efficiency or safety of the vessels; otherwise these amounts are charged to expense as incurred.
	The cost of each of the Company's vessels is depreciated from the date of acquisition on a straight-line basis over the vessel's remaining estimated economic useful life, after considering the estimated residual value which is equal to the product of vessels' lightweight tonnage and estimated scrap rate (in the range of $0.150 to $0.300 per light weight ton). Management estimates the useful life of the Company's vessels to be 30 years from the date of initial delivery from the shipyard. Secondhand vessels are depreciated from the date of their acquisition through their remaining estimated useful life. When regulations place limitations over the ability of a vessel to trade on a worldwide basis, its remaining useful life is adjusted at the date such regulations are adopted.

Accrued charter revenue/ unearned revenue	'
	(l) Accrued Charter Revenue/Unearned Revenue: The Company records identified assets or liabilities associated with the acquisition of a vessel at fair value, determined by reference to market data. The Company values any asset or liability arising from the market value of the time charters assumed when a vessel is acquired from entities that are not under common control. This policy does not apply when a vessel is acquired from entities that are under common control. The amount to be recorded as an asset or liability at the date of vessel delivery is based on the difference between the current fair market value of the charter and the net present value of future contractual cash flows. When the present value of the contractual cash flows of the time charter assumed is greater than its current fair value, the difference is recorded as accrued charter revenue. When the opposite situation occurs, any difference, capped to the vessel's fair value on a charter free basis, is recorded as unearned revenue. Such assets and liabilities, respectively, are amortized as a reduction of, or an increase in, revenue over the period of the time charter assumed.

Impairment of long lived assets	'
	(m) Impairment of Long-Lived Assets: The Company uses ASC 360 “Property plant and equipment”, which addresses financial accounting and reporting for the impairment or disposal of long-lived assets. The standard requires that long-lived assets and certain identifiable intangibles held and used by an entity be reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable.
	As of December 31, 2012 and 2013, the Company concluded that, as conditions in the worldwide shipping industry remain highly volatile, indicators existed which triggered the existence of potential impairment of its long-lived assets. These indicators included deterioration in the spot market, vessels' market values and the potential impact the current marketplace may have on its future operations. As a result, the Company performed an impairment assessment of the Company's long-lived assets by comparing the undiscounted projected net operating cash flows for each vessel to its respective carrying value. The Company's strategy is mainly to charter its vessels under long-term, fixed or variable rate time charters, providing the Company with contracted future cash flows.
	In developing estimates of future undiscounted cash flows, the Company makes assumptions and estimates about the vessels' future performance, with the significant assumptions being related to time charter rates, vessels' operating expenses, vessels' capital expenditures, vessels' residual value, fleet utilization and the estimated remaining useful life of each vessel. The assumptions used to develop estimates of future undiscounted cash flows are based on historical trends as well as future expectations and taking into consideration growth rates.
	The Company determines undiscounted projected net operating cash flows for each vessel and compares it to the vessel's carrying value. To the extent impairment indicators are present, the projected net operating cash flows are determined by considering the charter revenues from existing time charters for the fixed fleet days and an estimated daily time charter rate for the unfixed days (based on the most recent ten year historical average rates, inflated annually by a 3.30% growth rate being the historical and forecasted average world GDP nominal growth rate) over the remaining estimated life of the vessel assumed to be 30 years from the delivery of the vessel from the shipyard, expected outflows for vessels' operating expenses assuming an annual inflation rate of 3.50% (in line with the average world Consumer Price Index forecasted), planned dry-docking and special survey expenditures, management fees expenditures which are adjusted every year, after December 31, 2012, as provided under the Company's management agreements, by an inflation rate of 4.0% and fleet utilization of 99.2% (excluding the scheduled off-hire days for planned dry-dockings and special surveys which are determined separately ranging from 12 to 30 days depending on the size and age of each vessel) based on historical experience. The salvage value used in the impairment test is estimated to be in the range from $0.150 to $0.300 per light weight ton in accordance with the vessels' depreciation policy.
	The Company's assessment concluded that step two of the impairment analysis was not required and no impairment of vessels existed as of December 31, 2012 and 2013, as the undiscounted projected net operating cash flows per vessel exceeded the carrying value of each vessel. No impairment loss was recorded in 2011, 2012 or 2013.

Reporting assets held for sale	'
	(n) Reporting Assets held-for-sale: It is the Company's policy to dispose of vessels and other fixed assets when suitable opportunities occur and not necessarily to keep them until the end of their useful life. Long-lived assets classified as held for sale are measured at the lower of their carrying amount or fair value less cost to sell. These assets are not depreciated once they meet the criteria to be held for sale. At December 31, 2012 and 2013, one vessel and no vessels, respectively, were classified as held-for-sale.

Accounting for special survey and drydocking costs	'
	(o) Accounting for Special Survey and Dry-docking Costs: The Company follows the deferral method of accounting for special survey and dry-docking costs whereby actual costs incurred are deferred and are amortized on a straight-line basis over the period through the date the next survey is scheduled to become due. Costs deferred are limited to actual costs incurred at the yard and parts used in the dry-docking or special survey. If a survey is performed prior to the scheduled date, the remaining unamortized balances are immediately written off. Unamortized balances of vessels that are sold are written off and included in the calculation of the resulting gain or loss in the period of the vessel's sale. Furthermore, unamortized dry-docking and special survey balances of vessels that are classified as Assets held for sale and are not recoverable as of the date of such classification are immediately written off to the statement of income.

Financing costs	'
	(p) Financing Costs: Costs associated with new loans or refinancing of existing loans, including fees paid to lenders or required to be paid to third parties on the lender's behalf for obtaining new loans or refinancing existing loans, are recorded as deferred charges. Such fees are deferred and amortized to interest and finance costs during the life of the related debt using the effective interest method. Unamortized fees relating to loans repaid or refinanced, meeting the criteria of debt extinguishment, are expensed in the period the repayment or refinancing is made.

Concentration of credit risk	'
	(q) Concentration of Credit Risk: Financial instruments, which potentially subject the Company to significant concentrations of credit risk, consist principally of cash and cash equivalents, accounts receivable (included in current and non current assets), investments in affiliates and derivative contracts (interest rate swaps and foreign currency contracts). The Company places its cash and cash equivalents, consisting mostly of deposits, with high credit rated financial institutions. The Company performs periodic evaluations of the relative credit standing of those financial institutions. The Company is exposed to credit risk in the event of non-performance by counterparties to derivative instruments; however, the Company limits its exposure by diversifying among counterparties with high credit ratings. The Company limits its credit risk with accounts receivable and investments in affiliates by performing ongoing credit evaluations of its customers' and affiliates' financial condition and generally does not require collateral for its accounts receivable.

Voyage revenues	'
	(r) Voyage Revenues: Voyage revenues are generated from time charter agreements and are usually paid 15 days in advance. Time charter agreements with the same charterer are accounted for as separate agreements according to the terms and conditions of each agreement. Time charter revenues over the term of the charter are recorded as service is provided, when they become fixed and determinable.
	Revenues from time charter agreements providing for varying annual rates are accounted for as operating leases and thus recognized on a straight-line basis as the average revenue over the rental periods of such agreements, as service is performed. A voyage is deemed to commence upon the completion of discharge of the vessel's previous cargo and the sea passage for the next fixed cargo and is deemed to end upon the completion of discharge of the current cargo, provided an agreed non-cancelable charter agreement between the Company and the charterer is in existence, the charter rate is fixed or determinable and collectability is reasonably assured. Unearned revenue includes cash received prior to the balance sheet date for which all criteria to recognize as revenue have not been met, including any unearned revenue resulting from charter agreements providing for varying annual rates, which are accounted for on a straight-line basis. Unearned revenue also includes the unamortized balance of the liability associated with the acquisition of second-hand vessels with time charters attached which were acquired at values below fair market value at the date the acquisition agreement is consummated, as well as revenue recognized based on the average hire rate as derived from the entire duration of the charter party, rather than being recognized on the per year hire rates provided in the charter party when the daily hire rate decreases over time.
	Revenues for 2011, 2012 and 2013, derived from significant charterers individually accounting for 10% or more of revenues (in percentages of total revenues) were as follows:







		2011		2012		2013
	A	18	%	24	%	24	%
	B	34	%	33	%	31	%
	C	16	%	17	%	16	%
	D	10	%	10	%	9	%
	E	6	%	7	%	13	%
	Total	84	%	91	%	93	%




Voyage expenses	'
	(s) Voyage Expenses: Voyage expenses primarily consist of port, canal and bunker expenses that are unique to a particular charter and are paid for by the charterer under time charter arrangements or by the Company under voyage charter arrangements and commissions and fees, which are always paid for by the Company, regardless of the charter type. All voyage and vessel operating expenses are expensed as incurred, except for commissions. Commissions are deferred over the related voyage charter period to the extent revenue has been deferred since commissions are earned as the Company's revenues are earned.

Repairs and maintenance	'
	(t) Repairs and Maintenance: All repair and maintenance expenses, including underwater inspection expenses, are expensed in the year incurred. Such costs are included in vessel operating expenses in the accompanying consolidated statements of income.

Derivative financial instruments	'
	(u) Derivative Financial Instruments: The Company enters into interest rate swap contracts to manage its exposure to fluctuations of interest rate risks associated with specific borrowings. Interest rate differentials paid or received under these swap agreements are recognized as part of the interest expense related to the hedged debt. All derivatives are recognized in the consolidated financial statements at their fair value. On the inception date of the derivative contract, the Company designates the derivative as a hedge of a forecasted transaction or the variability of cash flow to be paid (“cash flow” hedge). Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in the consolidated statement of comprehensive income until earnings are affected by the forecasted transaction or the variability of cash flow and are then reported in earnings. Changes in the fair value of undesignated derivative instruments and the ineffective portion of designated derivative instruments are reported in earnings in the period in which those fair value changes have occurred. Realized gains or losses on early termination of the derivative instruments are also classified in earnings in the period of termination of the respective derivative instrument. The Company may re-designate an undesignated hedge after its inception as a hedge but then will consider its non zero value at re-designation in its assessment of effectiveness of the cash flow hedge.
	The Company, at each reporting date, formally documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions.
	This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions or variability of cash flow.
	The Company also formally assesses, both at the hedge's inception and, on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flow of hedged items. The Company considers a hedge to be highly effective if the change in fair value of the derivative hedging instrument is within 80% to 125% of the opposite change in the fair value of the hedged item attributable to the hedged risk. When it is determined that a derivative is not highly effective as a hedge or that it has ceased to be a highly effective hedge, the Company discontinues hedge accounting prospectively, in accordance with ASC 815 “Derivatives and Hedging”.
	The Company also enters forward exchange rate contracts to manage its exposure to currency exchange risk on certain foreign currency liabilities. The Company has not designated these forward exchange rate contracts for hedge accounting.

Earnings per share	'
	(v) Earnings per Share: Basic earnings per share are computed by dividing net income attributable to common equity holders by the weighted average number of shares of common stock outstanding during the year. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised. The Company had no dilutive securities outstanding during the three-year period ended December 31, 2013. Earnings per share attributable to common equity holders is adjusted by the contractual amount of dividends related to the preferred stock holders that accrue for the period.

Fair value measurements	'
	(w) Fair Value Measurements: The Company adopted, as of January 1, 2008, ASC 820 “Fair Value Measurements and Disclosures”, which defines, and provides guidance as to the measurement of, fair value. This standard creates a hierarchy of measurement and indicates that, when possible, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The fair value hierarchy gives the highest priority (Level 1) to quoted prices in active markets and the lowest priority (Level 3) to unobservable data, for example, the reporting entity's own data. Under the standard, fair value measurements are separately disclosed by level within the fair value hierarchy. The standard applies when assets or liabilities in the financial statements are to be measured at fair value, but does not require additional use of fair value beyond the requirements in other accounting principles (Notes 18 and 19).
	ASC 825 “Financial Instruments”, permits companies to report certain financial assets and financial liabilities at fair value. ASC 825 was effective for the Company as of January 1, 2008, at which time the Company could elect to apply the standard prospectively and measure certain financial instruments at fair value.
	The Company has evaluated the guidance contained in ASC 825, and has elected not to report any existing financial assets or liabilities at fair value that are not already so reported; therefore, the adoption of the statement had no impact on its financial position and results of operations. The Company retains the ability to elect the fair value option for certain future assets and liabilities acquired under this standard.

Segment reporting	'
	(x) Segment Reporting: The Company reports financial information and evaluates its operations by charter revenues and not by the length of ship employment for its customers, i.e., spot or time charters. The Company does not use discrete financial information to evaluate the operating results for each such type of charter. Although revenue can be identified for these types of charters, management cannot and does not identify expenses, profitability or other financial information for these charters. Furthermore, when the Company charters a vessel to a charterer, the charterer is free to trade the vessel worldwide (subject to certain agreed exclusions) and, as a result, the disclosure of geographic information is impracticable. As a result, management, including the chief operating decision maker, reviews operating results solely by revenue per day and operating results of the fleet and thus the Company has determined that it operates under one reportable segment.


Investments in Affiliate	'
	(y) Investments in Affiliate: Investments in the common stock of entities, in which the Company has significant influence over operating and financial policies, are accounted for using the equity method. Under this method, the investment in the affiliate is initially recorded at cost and is adjusted to recognize the Company's share of the earnings or losses of the investee after the acquisition date and is adjusted for impairment whenever facts and circumstances indicate that a decline in fair value below the cost basis is other than temporary. The amount of the adjustment is included in the determination of net income / (loss). Dividends received from an affiliate reduce the carrying amount of the investment. When the Company's share of losses in an affiliate equals or exceeds its interest in the affiliate, the Company does not recognize further losses unless the Company has incurred obligations or made payments on behalf of the affiliate.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	12 Months Ended
Significant Accounting Policies (Tables)	Dec. 31, 2013
Significant Accounting Policies [Abstract]:	'
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	'


		2011		2012		2013
	A	18	%	24	%	24	%
	B	34	%	33	%	31	%
	C	16	%	17	%	16	%
	D	10	%	10	%	9	%
	E	6	%	7	%	13	%
	Total	84	%	91	%	93	%

Inventories_Tables

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Dec. 31, 2013
Inventory Disclosure [Abstract]:	'
Schedule of Inventory, Current [Table Text Block]	'


		2012		2013
	Bunkers		268		303
	Lubricants		7,448		9,044
	Spare parts		1,682		1,658
	Total		9,398		11,005

Advances_For_Vessels_Acquisiti

Advances For Vessels Acquisitions (Tables)	12 Months Ended
Advances For Vessels Acquisitions (Tables)	Dec. 31, 2013
Advances for Vessel Acquisitions Disclosure [Abstract]	'
Schedule of Advances for Vessels Acquisitions [Table Text Block]	'


		2012	2013
	Pre-delivery installments	324,329	896,825
	Capitalized interest and finance costs	8,053	15,898
	Other capitalized costs	7,170	17,260
	Transferred to Vessels, net	-	(689,112	)
	Total	339,552	240,871

Vessels_Net_Tables

Vessels, Net (Tables)	12 Months Ended
Vessels, Net (Tables)	Dec. 31, 2013
Property Plant and Equipment [Abstract]:	'
Schedule of Vessels, Net [Table Text Block]	'

		Vessel Cost			Accumulated			Net Book
		Vessel Cost			Depreciation			Value
	Balance, January 1, 2011		2,148,860			-617,250			1,531,610
	Depreciation		-			(78,803	)		(78,803	)
	Vessel acquisitions and other vessels' cost		194,040			-			194,040
	Disposals		(44,792	)		16,832			(27,960	)
	Balance, December 31, 2011		2,298,108			-679,221			1,618,887
	Depreciation		-			(80,333	)		(80,333	)
	Transfer to assets held for sale		(25,000	)		20,697			(4,303	)
	Vessel acquisitions and other vessels' cost		74,053			-			74,053
	Disposals		(43,125	)		17,166			(25,959	)
	Balance, December 31, 2012		2,304,036			-721,691			1,582,345
	Depreciation		-			(89,903	)		(89,903	)
	Vessel acquisitions and other vessels' cost		51,853			-			51,853
	Transfer from advances for vessel acquisitions		689,112			-			689,112
	Derecognition of vessels		(29,659	)		53			(29,606	)
	Disposals		(54,343	)		37,930			(16,413	)
	Balance, December 31, 2013		2,960,999			-773,611			2,187,388

Deferred_Charges_Tables

Deferred Charges (Tables)	12 Months Ended
Deferred Charges (Tables)	Dec. 31, 2013
Deferred Charges Disclosure [Abstract]:	'
Schedule of deferred charges [table text block]	'

		Financing Costs			Dry-docking			Total
					and Special
					Survey Costs
	Balance, January 1, 2011		5,437			25,430			30,867
	Additions		9,233			6,122			15,355
	Amortization		(2,747	)		(8,139	)		(10,886	)
	Write-off		-			(2,695	)		(2,695	)
	Balance, December 31, 2011		11,923			20,718			32,641
	Additions		547			11,171			11,718
	Amortization		(1,143	)		(8,179	)		(9,322	)
	Write-off		(14	)		(786	)		(800	)
	Transfer to assets held for sale		-			(138	)		(138	)
	Balance, December 31, 2012		11,313			22,786			34,099
	Additions		210			6,189			6,399
	Amortization		(1,569	)		(8,084	)		(9,653	)
	Derecognition of deferred charges		-			(553	)		(553	)
	Write-off		-			(428	)		(428	)
	Balance, December 31, 2013		9,954			19,910			29,864

Investements_in_affiliate_Tabl

Investements in affiliate (Tables)	12 Months Ended
Investements in affiliate (Tables)	Dec. 31, 2013
Investments in affiliate [Abstract]:	'
Schedule of Investments In Affiliate - Jointly owned companies additional information [Table Text Block]	'

					Participation %	Year Established /Acquired
	Entity		Vessel/Hull		31-Dec-13	Year Established /Acquired
	Steadman Maritime Co.		Ensenada Express		49%	1-Jul-13
	Marchant Maritime Co.		X-Press Padma		49%	8-Jul-13
	Horton Maritime Co.		Petalidi		49%	26-Jun-13
	Kemp Maritime Co.		Hull NCP0113		49%	6-Jun-13
	Hyde Maritime Co.		Hull NCP0114		49%	6-Jun-13
	Ainsley Maritime Co.		Hull NCP0115		25%	25-Jun-13
	Ambrose Maritime Co.		Hull NCP0116		25%	25-Jun-13
	Connell Maritime Co.		n/a	40%		18-Dec-13


Schedule of Investments In Affiliate - Summarized financial information of the affiliates [Table text block]	'

		31-Dec-13
	Non-current assets	49,072
	Current assets	3,184
		52,256

	Current liabilities	2,196


		Period July 12, 2013 to December 31, 2013
	Voyage revenue	5,580
	Net Income	1,410

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
Long-Term Debt (Tables)	Dec. 31, 2013
Long-Term Debt [Abstract]:	'
Schedule of Debt [Table Text Block]	'


	Borrower(s)				2012					2013
	1	Credit Facility					767,164				675,774
	2	Term Loans:
		1	Costis Maritime Corporation and Christos Maritime Corporation			109,500			100,500
		2	Mas Shipping Co.			54,750			47,000
		3	Montes Shipping Co. and Kelsen Shipping Co.			102,000			90,000
		4	Marathos Shipping Inc.			-			-
		5	Capetanissa Maritime Corporation			60,000			55,000
		6	Rena Maritime Corporation			57,500			52,500
		7	Bullow Investments Inc.			-			-
		8	Merin Shipping Co., Lytton Shipping Co., Venor Shipping Co. and Volk Shipping Co.
		8				-			-
		9	Costamare Inc.			103,986			90,100
		10	Adele Shipping Co., Bastian Shipping Co. and Cadence Shipping Co.			32,199			146,295
		11	Costamare Inc.			53,480			129,243
		12	Undine Shipping Co., Quentin Shipping Co. and Sander Shipping Co.			61,120			224,107
		13	Raymond Shipping Co. and Terance Shipping Co.			45,840			148,707
		14	Costamare Inc.			114,350			108,350
						794,725			1,191,802
			Total			1,561,889			1,867,576
			Less-current portion			(162,169		)	(206,717			)
			Long-term portion			1,399,720			1,660,859


Schedule of Maturities of Long-Term Debt [Table Text Block]	'


	Year ending			Amount
	December 31,			Amount
	2014			206,717
	2015			211,445
	2016			201,343
	2017			243,343
	2018			582,390
	2019 and thereafter			422,338
				1,867,576

Accrued_Charter_Revenue_Curren

Accrued Charter Revenue, Current and Non-Current and Unearned Revenue, Current and Non-Current (Tables)	12 Months Ended
	Dec. 31, 2013
Accrued Charter Revenue and Unearned Revenue Disclosure [Abstract]	'
Schedule of the maturities of the net accrued charter revenue [Table Text Block]	'


	Year ending	Amount
	December 31,	Amount
	2014	(1,996	)
	2015	(4,425	)
	2016	(9,431	)
	2017	(9,639	)
	2018	(237	)
	2019 and thereafter	8,832
		-16,896

Schedule of Unearned Revenue, Current and Non-Current [Table Text Block]	'


		2012		2013
	Hires collected in advance	4,002		7,196
	Charter revenue resulting from varying charter rates	18,234		27,569
	Total	22,236		34,765
	Less current portion	(5,595	)	(9,601	)
	Non-current portion	16,641		25,164

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]:	'
Schedule of Non Cancelable Long-Term Time Charter Contracts [Table Text Block]	'

		Amount

	Year ending
	December 31,
	2014		468,546
	2015		446,855
	2016		417,343
	2017		371,709
	2018		198,759
	2019 and thereafter		429,611
		2,332,823

Earnings_Loss_per_share_Basic_

Earnings/ (Loss) per share - Basic and Diluted (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings per share, Basic [Abstract]:	'
Schedule Of Earnings per share, Basic and Diluted [Table TextBlock]	'


			2011		2012			2013
			Basic EPS		Basic EPS		Basic EPS
	Net income	$	87,592	$	81,129	$	103,087
	Less paid and accrued earnings allocated to Preferred Stock				-		(1,536		)

			-
	Net income available to common stockholders				81,129		101,551
			87,592

	Weighted average number of common shares, basic				67,612,842		74,800,000
			60,300,000

	Earnings per common share	$	1.45	$	1.20	$	1.36

Interest_and_Finance_Costs_Tab

Interest and Finance Costs (Tables)	12 Months Ended
Interest and Finance Costs (Tables)	Dec. 31, 2013
Interest and Finance Costs [Abstract]:	'
Interest And Finance Costs [Table Text Block]	'


		2011		2012		2013
	Interest expense	21,218		28,485		33,018
	Interest capitalized	(5,525	)	(8,476	)	(11,098	)
	Swap effect	52,379		48,346		48,453
	Amortization and write-off of financing costs			1,157		1,569
	Amortization and write-off of financing costs	2,747		1,157		1,569
	Commitment fees	4,369		4,921		2,283
	Bank charges and other	253		301		308
		75,441		74,734		74,533

Derivatives_Tables

Derivatives (Tables)	12 Months Ended
Derivatives (Tables)	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]:	'
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]	'


	Effective			Termination		Notional	Fixed rate		Floating rate		Fair		Fair
	date			date		amount	(Costamare		(Costamare		value		value Dec. 31,
						on	pays)		receives)		Dec. 31,		2013
						effective					2012
						date
	30/6/2008			30/6/2015		425,000	4.03%p.a.		USD LIBOR 3M BBA		(18,407	)	(8,916	)
	30/6/2008			30/6/2015		75,000	4.03%p.a.		USD LIBOR 3M BBA		(3,248	)	(1,573	)
	30/9/2008			30/6/2015		100,000	4.09%p.a.		USD LIBOR 3M BBA		(4,403	)	(2,132	)
	30/9/2008			30/6/2015		250,000	4.02%p.a.		USD LIBOR 3M BBA		(10,775	)	(5,231	)
	16/5/2008			16/5/2014		75,000	3.88%p.a.		USD LIBOR 6M BBA		(2,671	)	(880	)
	16/5/2008			16/5/2014		75,000	3.88%p.a.		USD LIBOR 6M BBA		(2,671	)	(880	)
	17/6/2008			17/6/2013		73,000	3.57%p.a.		USD LIBOR 6M BBA		(787	)	-
	17/6/2008			17/6/2013		73,000	3.57%p.a.		USD LIBOR 6M BBA		(787	)	-
	21/2/2007			21/2/2017		85,000	Zero cost Interest rate Collar*				(11,122	)	(7,771	)
	4/8/08			5/8/13		74,000	3.60%p.a.		USD LIBOR 6M BBA		(1,592	)	-
	30/6/2011			29/6/2018		50,000	3.45%p.a.		USD LIBOR 3M BBA		(19,783	)	(12,933	)
	30/9/2011			29/6/2018		20,000	4.05%p.a.		USD LIBOR 3M BBA		(26,075	)	(21,125	)
	28/9/2012			29/6/2018		40,000	3.60%p.a.		USD LIBOR 3M BBA		(5,852	)	(3,737	)
	22/8/2011			22/8/2018		65,000	2.79%p.a.		USD LIBOR 6M BBA		(5,087	)	(3,015	)
	31/1/2013			29/01/2021		133,700	3.51%p.a.		USD LIBOR 6M BBA		(16,672	)	(9,981	)
	15/1/2014 (**)			15/1/2021		67,781	2.94%p.a.		USD LIBOR 3M BBA		(4,931	)	(2,603	)
	15/2/2014			15/2/2021		67,781	2.99%p.a.		USD LIBOR 3M BBA		(4,990	)	(2,595	)
	15/3/2014			15/3/2021		67,781	3.03%p.a.		USD LIBOR 3M BBA		(5,019	)	(2,555	)
	5/4/13			6/4/20		30,000	2.39%p.a.		USD LIBOR 3M BBA		(1,892	)	(754	)
	17/6/2013			15/6/2020		30,000	2.49%p.a.		USD LIBOR 3M BBA		(1,949	)	(728	)
	15/8/2013			17/8/2020		30,000	2.58%p.a.		USD LIBOR 3M BBA		(2,009	)	(878	)
	15/8/2013			17/8/2020		30,000	2.41%p.a.		USD LIBOR 3M BBA		(1,751	)	(606	)
	5/4/13			6/4/20		30,000	2.24%p.a.		USD LIBOR 3M BBA		(1,684	)	(522	)
	17/6/2013			15/6/2020		30,000	2.32%p.a.		USD LIBOR 3M BBA		(1,703	)	(467	)
	15/8/2013			17/8/2020		16,400	2.46%p.a.		USD LIBOR 3M BBA		(1,050	)	(374	)
	17/6/2013			15/6/2020		16,400	2.38%p.a.		USD LIBOR 3M BBA		(1,030	)	(304	)
	5/4/13			6/4/20		16,400	2.29%p.a.		USD LIBOR 3M BBA		(1,006	)	(325	)
	28/6/2013			23/6/2020		76,400	1.53%p.a.		USD LIBOR 3M BBA		-		1,587
	28/8/2013			28/8/2020		76,400	1.60%p.a.		USD LIBOR 3M BBA		-		1,492

									Total fair value		-158,946		-87,806


	* Notional amount $85,000 amortizing zero-cost collar (2.23%-6.00%) with knock-in floor sold at 2.23% and struck at 6.00%, as a 10-year forward hedge, covering the period from February 2007 to February 2017. The agreement guarantees that the interest rate payable on the Company's loans throughout the 10-year period will always remain between 2.23% and 6.00% excluding margin.
	** This swap was terminated on January 14, 2014 (Note 21(d)).

Schedule of Derivatives in ASC 815 Cash Flow Hedging Relationships [Table Text Block]	'




				The Effect of Derivative Instruments for the years ended December 31, 2011, 2012 and 2013

									Derivatives in ASC 815 Cash Flow Hedging Relationships
															Location of Gain / (Loss) Recognized in Income on Derivative (Ineffective Portion)

		Amount of Gain / (Loss) Recognized in Accumulated OCI on Derivative														Amount of Gain / (Loss)
		(Effective Portion)														Recognized in Income on
																Derivative
																(Ineffective Portion)
		2011		2012			2013										2011	2012	2013
	Interest rate swaps	(102,262	)	(51,386	)		27,964								Gain / (Loss) on derivative instruments		-	-	254

	Reclassification to interest and finance costs
		46,780		42,877			42,922
	Total	-55,482		-8,509			70,886										-	-	254




Schedule of Derivatives Not Designated as Hedging Instruments under ASC 815 [Table Text Block]	'








	Derivatives Not Designated as Hedging Instruments
	under ASC 815
		Location of Gain / (Loss)				Amount of Gain / (Loss)
		Recognized on				Recognized in Income
		Derivative				on Derivative
							2011		2012		2013
	Interest rate swaps	Gain / (Loss) on derivative instruments					(7,267	)	(1,611	)	6,459
	Realized ineffectiveness	Gain / (Loss) on derivative instruments					-		-		254
	Forward contracts	Gain / (Loss) on derivative instruments
	Forward contracts	Gain / (Loss) on derivative instruments					-1,442		1,149		-165
	Total						-8,709		-462		6,548

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosure [Abstract]:	'
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]	'



		December 31,		Quoted Prices in		Significant			Unobservable
		2012		Active Markets for		Other			Inputs
				Identical Assets		Observable			(Level 3)
				(Level 1)		Inputs
						(Level 2)
	Recurring measurements:
	Forward contracts—asset position	165		-		165			-
	Interest rate swaps—liability position	(180,811	)	-		(180,811		)	-
	Total	-180,646		-		-180,646			-



Fair value liabilities of the current reporting period measured on recurring basis [Table Text Block]	'



		December 31,			Quoted Prices in		Significant			Unobservable
		2013			Active Markets for		Other			Inputs
					Identical Assets		Observable			(Level 3)
					(Level 1)		Inputs
							(Level 2)
	Recurring measurements:
	Forward contracts—asset position	-			-		-			-
	Interest rate swaps—liability position	(103,212	)		-		(103,212	)		-
	Total	-103,212			-		-103,212			-

Basis_of_Presentation_and_Gene

Basis of Presentation and General Information-Additional Information (Details) (USD $)	12 Months Ended	3 Months Ended	10 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2013	Mar. 27, 2012	Oct. 19, 2012	Aug. 07, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
	Dec. 31, 2013	Follow on offering [Member]	Second follow-on offering [Member]	Public offering of Series B Cumulative Redeemable Perpetual Preferred Stock [Member]	Costamare Inc [Member]	Fleet information [Member]	Fleet information [Member]	Number of Subsidiaries [Member]
Entity Incorporation State Country Name	'	'	'	'	'Republic of Marshall Islands	'	'	'
Entity Incorporation Date Of Incorporation	'	'	'	'	21-Apr-08	'	'	'
Number of shipowning companies acquired during the entity's reorganization	'	'	'	'	53	'	'	'
Date of reorganization completion	'	'	'	'	'November 2008	'	'	'
Date of IPO completion	'	'	'	'	'November 4, 2010	'	'	'
Preferred stock dividend rate	7.63%	'	'	7.63%	'	'	'	'
Stock Issued During Period Shares New Issues	'	7,500,000	7,000,000	2,000,000	'	'	'	'
Common Stock Par Or Stated Value Per Share	'	$0.00	$0.00	$0.00	'	'	'	'
Sale of Stock, Price Per Share	'	$14.10	$14	$25	'	'	'	'
Balance of shares as at year end	'	'	'	'	74,800,000	'	'	'
Percentage of outstanding common shares owned by the Family	'	'	'	'	64.80%	'	'	'
Number of vessels at period end	'	'	'	'	'	52	47	'
Carrying capacity of vessels at period end (TEU)	'	'	'	'	'	295,872	239,498	'
Number of wholly owned subsidiaries with vessels	'	'	'	'	'	'	'	52
Number of wholly owned subsidiaries that sold or disposed their vessels and became dormant	'	'	'	'	'	'	'	28
Number of wholly owned subsidiaries established for the newbuilds	'	'	'	'	'	'	'	3
Number of wholly owned subsidiaries established for future acquisitions or investments	'	'	'	'	'	'	'	3
Total wholly owned subsidiaries as at period end	'	'	'	'	'	'	'	86

Significant_Accounting_Policie3

Significant Accounting Policies-Addittional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Significant Accounting policies_Receivables [Abstract]:	'	'
Allowance for doubtful accounts	$1,495	$0
Significant Accounting Policies_Vessels, Net [Abstract]	'	'
Estimated scrap rate	'$0.150 to $0.300 per light weight ton	'
Estimated useful life	'30 years	'
Significant Accounting Policies_Impairment of Long-Lived Assets [Abstract]	'	'
Estimated scrap rate	'$0.150 to $0.300 per light weight ton	'
Growth rate	3.30%	'
Estimated useful life	'30 years	'
Annual inflation rate	3.50%	'
Drydock and Special survey off-hire days range	'12-30 days	'
Annual adjustment on management fees after December 31, 2012	4.00%	'
Fleet Utilization	99.20%	'
Significant Accounting Policies_Reporting Assets Held for sale [Abstract]:	'	'
Number of vessels held for sale	0	1
Significant Accounting Policies_Derivative Financial Instruments [Abstact]	'	'
Hedge effectiveness criteria	'80% to 125%	'

Significant_Accounting_Policie4

Significant Accounting Policies (Table) (Details)	12 Months Ended
Significant Accounting Policies (Table) (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	93.00%	91.00%	84.00%
Major customer A [member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	24.00%	24.00%	18.00%
Major customer B [member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	31.00%	33.00%	34.00%
Major customer C [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	16.00%	17.00%	16.00%
Major customer D [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	9.00%	10.00%	10.00%
Major customer E [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk percentage	13.00%	7.00%	6.00%

Transactions_with_Related_Part

Transactions with Related Parties (Details) (USD $)	12 Months Ended
Transactions with Related Parties (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]	'	'	'
Annual adjustment on management fees after December 31, 2012	4.00%	'	'
Management fees charged during the year	$16,580,000	$15,171,000	$15,349,000
Commission charged on charter hire agreements during the year	3,139,000	2,873,000	2,877,000
Due From Related Parties, Current	2,679,000	2,616,000	'
Costamare Shipping Company SA [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Management fee per day per vessel	884	850	850
Management fee per day per vessel under bareboat charter	442	425	425
Annual fee for Company's officers	1,000,000	'	'
Portion of annual fee for Company's officers charged during the period	1,000,000	1,000,000	1,000,000
Management Agreement Expiration Date	'December 31, 2015	'	'
Management agreement's automatic extention expiration date	'December 31, 2020	'	'
Annual adjustment on management fees after December 31, 2012	4.00%	'	'
Months required for cancellation written notice for management agreement	12	'	'
Management fees calculated on the sale of a vessel	'3 months	'	'
Construction supervisory fee	700,000	'	'
Annual adjustment on supervisory fees after December 31, 2012	4.00%	'	'
Construction supervisory fee, paid	2,450,000	3,500,000	'
Commission charged on charter hire agreements	0.75%	'	'
Management agreement date with V-Ships Greece Ltd.	'January 7, 2013	'	'
Termination fee, description	'The termination fee is equal to (a) the lesser of (i) five and (ii) the number of full years remaining prior to December 31, 2020, times (b) the aggregate fees due and payable to Costamare Shipping during the 12-month period ending on the date of termination; 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	'	'
Working capital security	1,350,000	'	'
Working capital security, per vessel	75,000	'	'
Number of vessels under the Cell	18	'	'
Total charges by the manager to Company's affiliates	1,070,000	'	'
Management fees charged during the year	15,570,000	12,208,000	12,038,000
Commission charged on charter hire agreements during the year	3,139,000	2,873,000	2,877,000
Due From Related Parties, Current	2,076,000	1,561,000	'
Ciel shipmanagement SA [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Management fee per day per vessel	600	600	600
Date when the services provided stopped	'April 2013	'	'
Management fees charged during the year	1,010,000	2,963,000	3,311,000
Due From Related Parties, Current	603,000	1,055,000	'
Number of vessels managed	0	12	'
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	9	9	'

Transactions_with_Related_Part1

Transactions with Related Parties-Ciel Shipmanagement SA (Details)	Dec. 31, 2013	Nov. 29, 2012
Company's Chairman and CEO [Member]	'	'
Related Party Transaction [Line Items]	'	'
Percentage of ownership	100.00%	50.20%
Ciel CEO [Member]	'	'
Related Party Transaction [Line Items]	'	'
Percentage of ownership	'	49.80%

Transactions_with_Related_Part2

Transactions with Related Parties-Shanghai Costamare Ship Management Co Ltd (Details)	Dec. 31, 2013
Company's Chairman and CEO [Member]	'
Related Party Transaction [Line Items]	'
Percentage of ownership	70.00%
SCSC CEO [Member]	'
Related Party Transaction [Line Items]	'
Percentage of ownership	30.00%

InvestmentsAdditional_Informat

Investments-Additional Information (Details) (USD $)	12 Months Ended			2 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 22, 2011	Dec. 31, 2011	Dec. 31, 2010
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Province of Ontario Bond [Member]	Province of Ontario Bond [Member]	Province of Ontario Bond [Member]
Schedule of Available for Sale Securities [Line Items]	'	'	'	'	'	'
Investments	'	'	'	'	'	$6,080
Proceeds from sale of available for sale securities	0	0	6,082	6,082	'	'
Unrealized gain loss on available for sale securities	'	'	'	'	$8	'

Inventories_Table_Details

Inventories (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]:	'	'
Inventories, Bunkers	$303	$268
Inventories, Lubricants	9,044	7,448
Inventories, Spare parts	1,658	1,682
Total	$11,005	$9,398

Recovered_Sheet1

Advances for Vessels Acquisitions-Additional Information (Details) (USD $)

12 Months Ended

9 Months Ended

1 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Sep. 21, 2010

Jan. 28, 2011

Dec. 31, 2013

Apr. 20, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2012

Adele Shipping Co, Bastian Shipping Co Cadence Shipping Co [Member]

Jodie Shipping Co (S4010), Kayley Shipping Co (S4011) [Member]

Jodie Shipping Co. (S4010) - MSC Athens (Hull 4010) [Member]

Kayley Shipping Co. (S4011) - MSC Athos (Hull 4011) [Member]

MSC Athens (Hull S4010) and MSC Athos (Hull S4011) [Member]

Undine Shipping Co, Terance Shipping Co, Quentin Shipping Co, Raymond Shipping Co, Sander Shipping Co [Member]

Quentin Shipping Co. - Valor (Hull S4020) [Member]

Raymond Shipping Co. - Value (Hull S4021) [Member]

Sander Shipping Co. - Valiant (Hull S4022) [Member]

Terance Shipping Co. - Valence (Hull S4023) [Member]

Undine Shipping Co. - Vantage (Hull S4024) [Member]

Valor, Value, Valiant, Valence and Vantage [Member]

Ten newbuild vessels [Member]

Capacity of Vessels

9,403

8,827

Vessels under construction cost

$285,240

$95,080

$953,740

Contracted time charter period

'10 years

Daily time charter rate

Expected delivery

'January 2014- April 2014

Delivery date

'March 14, 2013

'April 8, 2013

'June 3, 2013

'June 25, 2013

'August 5, 2013

'September 2, 2013

'November 8, 2013

Transferred to Vessels, net

-689,112

196,675

492,437

Advances for vessel acquisitions

240,871

339,552

240,871

339,552

Number of future contracted acquisitions

Pre-delivery installments

896,825

324,329

896,825

324,329

Pre-delivery installments paid during the reporting period

$143,131

Advances_for_Vessels_Acquisiti1

Advances for Vessels Acquisitions (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Advances for Vessel Acquisitions Disclosure [Abstract]	'	'
Pre-delivery installments	$896,825	$324,329
Capitalized interest and finance costs	15,898	8,053
Other capitalized costs	17,260	7,170
Transferred to Vessels, net	-689,112	0
Total	$240,871	$339,552

Vessels_Net_Table_Details

Vessels, Net (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Balance at the beginning of the period	$1,582,345	'	'
Depreciation	89,958	80,333	78,803
Transfer to assets held for sale	'	-138	'
Transfer from advances for vessel acquisitions	-689,112	0	'
Balance at the end of the period	2,187,388	1,582,345	'
Vessel Cost [Member]	'	'	'
Balance at the beginning of the period	2,304,036	2,298,108	2,148,860
Vessel acquisitions and other vessels cost	51,853	74,053	194,040
Disposals	-54,343	-43,125	-44,792
Transfer to assets held for sale	'	-25,000	'
Transfer from advances for vessel acquisitions	689,112	'	'
Derecognition of veesels	-29,659	'	'
Balance at the end of the period	2,960,999	2,304,036	2,298,108
Accumulated Depreciation [Member]	'	'	'
Balance at the beginning of the period	-721,691	-679,221	-617,250
Depreciation	-89,903	-80,333	-78,803
Disposals	37,930	17,166	16,832
Transfer to assets held for sale	'	20,697	'
Derecognition of veesels	53	'	'
Balance at the end of the period	-773,611	-721,691	-679,221
Net Book Value [Member]	'	'	'
Balance at the beginning of the period	1,582,345	1,618,887	1,531,610
Depreciation	-89,903	-80,333	-78,803
Vessel acquisitions and other vessels cost	51,853	74,053	194,040
Disposals	-16,413	-25,959	-27,960
Transfer to assets held for sale	'	-4,303	'
Transfer from advances for vessel acquisitions	689,112	'	'
Derecognition of veesels	-29,606	'	'
Balance at the end of the period	$2,187,388	$1,582,345	$1,618,887

Vessels_NetAdditional_Informat

Vessels, Net-Additional Information (Details) (USD $)

12 Months Ended

6 Months Ended

12 Months Ended

11 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jul. 12, 2013

Dec. 31, 2013

Dec. 03, 2012

Dec. 31, 2012

Dec. 31, 2013

Secondhand Containership vessel MSC Ulsan, Koroni, Kyparisia, Stadt Luebeck and Messini [Member]

Containership vessel Gather, Gifted, Genius I and Horizon [Member]

Secondhand containerships (Prosper, MSC Reunion, MSC Sierra II, MSC Namibia II, MSC Romanos and MSC Methoni)

MSC Namibia, MSC Sierra, MSC Sudan, MSC Fado, MSC Tuscany, Garden and Rena (CTL) [Member]

MSC Athens, MSC Athos, Valor, Value, Valiant, Valence and Vantage [Member]

Venetiko, Petalidi, Ensenada Express and X-Press Padma [Member]

Petalidi, Ensenada Express and X-Press Padma under Framework Agreement with York [Member]

MSC Washington, MSC Austria and MSC Antwerp disposal [Member]

MSC Washington disposal [Member]

MSC Austria and MSC Antwerp disposal [Member]

Vessels, net, additional information [Member]

Vessels' cost

$73,000

$154,826

$689,112

$51,853

Vessels' disposal price

22,110

48,742

7,909

15,655

Gain on sale of vessel

-518

2,796

-13,077

-2,796

13,077

518

Disposal contracted price

8,154

Disposal date

'January 2, 2013

Participation in the share capital of shipowning companies by counter party

51.00%

Vessels value at time of acquisition

29,606

Carrying value of fully depreciated vessels

4,751

Number of fully depreciated vessels

Carrying value of vessels provided as collaterals to secure loans

$2,051,038

Number of vessels provided as collaterals to secure loans

Deferred_Charges_Table_Details

Deferred Charges (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Balance at beginning of the period	$34,099	$32,641	$30,867
Additions	6,399	11,718	15,355
Amortization	-9,653	-9,322	-10,886
Write-off	-428	-800	-2,695
Transfer to assets held for sale	'	-138	'
Derecognition of deferred charges	-553	'	'
Balance at the end of the period	29,864	34,099	32,641
Financing Costs [Member]	'	'	'
Balance at beginning of the period	11,313	11,923	5,437
Additions	210	547	9,233
Amortization	-1,569	-1,143	-2,747
Write-off	0	-14	0
Transfer to assets held for sale	'	0	'
Derecognition of deferred charges	0	'	'
Balance at the end of the period	9,954	11,313	11,923
Dry-docking and Special Survey Costs [Member]	'	'	'
Balance at beginning of the period	22,786	20,718	25,430
Additions	6,189	11,171	6,122
Amortization	-8,084	-8,179	-8,139
Write-off	-428	-786	-2,695
Transfer to assets held for sale	'	-138	'
Derecognition of deferred charges	-553	'	'
Balance at the end of the period	$19,910	$22,786	$20,718

Deferred_ChargesAdditional_Inf

Deferred Charges-Additional Information (Details)	12 Months Ended
Deferred Charges-Additional Information (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Charges Disclosure [Abstract]:	'	'	'
Number of vessels underwent DD during the year	8	9	8

Costamare_Ventures_IncAddition

Costamare Ventures Inc.-Additional information (Details)	12 Months Ended
Costamare Ventures Inc.-Additional information (Details)	Dec. 31, 2013
Costamare Ventures Disclosure [Abstarct]:	'
Date of entry into Agreement	'May 15, 2013
Subsidiary involved into agreement	'Costamare Ventures Inc.
Counterparty involved into the agreement	'Sparrow Holdings LP (York)
Range of participation of Costamare Ventures	'between 25% and 49%
Term of the agreement in years	6
Number of jointly owned companies	8
Maximum investment amount by York (in millions of USD)	'up to $250 million
Minimum investment amount by Costamare Ventures (in millions of USD)	'$75 million
Option for maximum investment amount by Costamare Ventures (in millions of USD)	'up to $240 million

Investments_In_Affiliate_Joint

Investments In Affiliate - Jointly owned companies (Table) (Details)	12 Months Ended
	Dec. 31, 2013
Steadman Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Ensenada Express
Participation percentage of Costamare Ventures	49.00%
Year of establishment or acquisition	'2013-07-01
Marchant Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'X-Press Padma
Participation percentage of Costamare Ventures	49.00%
Year of establishment or acquisition	'2013-07-08
Horton Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Petalidi
Participation percentage of Costamare Ventures	49.00%
Year of establishment or acquisition	'2013-06-26
Kemp Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Hull NCP0113
Participation percentage of Costamare Ventures	49.00%
Year of establishment or acquisition	'2013-06-06
Hyde Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Hull NCP0114
Participation percentage of Costamare Ventures	49.00%
Year of establishment or acquisition	'2013-06-06
Ainsley Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Hull NCP0115
Participation percentage of Costamare Ventures	25.00%
Year of establishment or acquisition	'2013-06-25
Ambrose Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'Hull NCP0116
Participation percentage of Costamare Ventures	25.00%
Year of establishment or acquisition	'2013-06-25
Connell Maritime Co. [Member]	'
Affiliate jointly - owned companies [Line Items]	'
Vessel name or hull name	'n/a
Participation percentage of Costamare Ventures	40.00%
Year of establishment or acquisition	'2013-12-18

Investments_In_Affiliate_Table

Investments In Affiliate (Table) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jul. 12, 2013	Dec. 31, 2013
	York participation in the share capital of Steadman Maritime Co., Marchant Maritime Co. and Horton Maritime Co. [Member]	July 2013, Costamare Ventures participation in the share capital of Kemp Maritime Co. and Hyde Maritime Co. for the construction of two 9000 TEU containerships, subject to upgrade [Member]
Affiliate jointly - owned companies [Line Items]	'	'
Percentage of participation	51.00%	49.00%
Aggregate contributing amount	$16,044	$8,707

Investments_In_Affiliate_Summa

Investments In Affiliate - Summarized financial information of the affiliates (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Affiliate jointly - owned companies - summarized financial information [Line Items]	'	'	'
Voyage revenue	$414,249	$386,155	$382,155
December 31, 2013 [Member]	'	'	'
Affiliate jointly - owned companies - summarized financial information [Line Items]	'	'	'
Non-current assets	49,072	'	'
Current assets	3,184	'	'
Total assets of affiliates	52,256	'	'
Current liabilities	2,196	'	'
Period July 12, 2013 to December 31, 2013 [Member]	'	'	'
Affiliate jointly - owned companies - summarized financial information [Line Items]	'	'	'
Voyage revenue	5,580	'	'
Net income	$1,410	'	'

LongTerm_Debt_Table_Details

Long-Term Debt (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Long-Term Debt [Abstract]:	'	'
Credit Facility	$675,774	$767,164
Costis Maritime Corporation and Christos Maritime Corporation	100,500	109,500
Mas Shipping Co	47,000	54,750
Montes Shipping Co and Kelsen Shipping Co	90,000	102,000
Marathos Shipping Inc	0	0
Capetanissa Maritime Corporation	55,000	60,000
Rena Maritime Corporation	52,500	57,500
Bullow Investments Inc	0	0
Merin Shipping Co., Lytton Shipping Co., Venor Shipping Co. and Volk Shipping Co	0	0
Costamare Inc.	90,100	103,986
Adele Shipping Co., Bastian Shipping Co. and Cadence Shipping Co.	146,295	32,199
Costamare Inc.	129,243	53,480
Undine Shipping Co., Quentin Shipping Co. and Sander Shipping Co.	224,107	61,120
Raymond Shipping Co. and Terance Shipping Co.	148,707	45,840
Costamare Inc.	108,350	114,350
Total Term Loans	1,191,802	794,725
Total	1,867,576	1,561,889
Less-current portion	-206,717	-162,169
Long-term Portion	$1,660,859	$1,399,720

Longterm_debtCredit_facilityAd

Long-term debt-Credit facility-Additional Information (Details) (USD $)	8 Months Ended	12 Months Ended		12 Months Ended		9 Months Ended	5 Months Ended
In Thousands, unless otherwise specified	Aug. 22, 2008	Dec. 31, 2013	Jul. 22, 2008	Dec. 31, 2013	Dec. 17, 2012	Sep. 30, 2013	28-May-13	Aug. 30, 2013
	Credit facility [Member]	Credit facility [Member]	Credit facility [Member]	Credit facility and certain term loans [Member]	Fourth supplemental agreement [Member]	MSC Antwerp (ex Sophia Britannia) disposal [Member]	Fifth supplemental agreement [Member]	Sixth supplemental agreement [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Maximum Borrowing Capacity	'	'	$1,000,000	'	'	'	'	'
Portion of the Facility used to repay existing indebtness	'	'	631,340	'	'	'	'	'
Line of Credit Facility Frequency of Payments	'quarterly	'	'	'	'	'	'	'
Facility repayments due to sale of vessel	'	'	'	'	'	1,500	'	'
Line of Credit number of outstanding periodic payments of principal	'	18	'	'	'	'	'	'
Line of Credit Periodic Payment of Principal	'	22,473	'	'	'	'	'	'
Balloon payment	'	271,260	'	'	'	'	'	'
Loan facility amalgamation date	'	'June 30, 2011	'	'	'	'	'	'
Third supplemental agreement date	'	'September 6,2011	'	'	'	'	'	'
Minimum liquidity ratio	'	'	'	3.00%	'	'	'	'
Maximum ratio of Total Liabilities to Market Value Adjusted Total Assets	'	'	'	'0.75:1	'	'	'	'
Number of vessels secured the Facility with First priority Mortgages	'	18	'	'	'	'	'	'
Number of ship owning companies as corporate guarantees	'	18	'	'	'	'	'	'
Number of vessels replaced existing vessels with first priority mortgage(s)	'	'	'	'	2	'	'	2
Number of vessels changed their flag	'	'	'	'	'	'	5	'
Maximum net funded debt to total net assets ratio	'	'	'	80.00%	'	'	'	'
Minimum liquidity amount	'	'	'	30,000	'	'	'	'
Minimum Ratio of EBITDA to net interest expense	'	'	'	'2.50:1	'	'	'	'
Minimum Market Value Adjusted Net Worth	'	'	'	$500,000	'	'	'	'

Longterm_debtTerm_loansAdditio

Long-term debt-Term loans-Additional Information (Details) (USD $)

12 Months Ended

11 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Nov. 19, 2010

Dec. 31, 2013

Jan. 14, 2011

Dec. 31, 2013

Apr. 07, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Aug. 16, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Oct. 12, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Oct. 06, 2011

Jun. 29, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Loan for the acquisition of the vessels Sealand New York and Sealand Washington [Member]

Loan for the acquisition of the vessel Maersk Kokura [Member]

Loan for the acquisition of the vessels Maersk Kawasaki and Maersk Kure [Member]

Loan for the acquisition of the vessel MSC Mandraki (ex. Maersk Mandraki) (Fully repaid) [Member]

Loan for the acquisition of the vessel Cosco Beijing [Member]

Loan for the acquisition of the vessel Cosco Guangzhou [Member]

Loan for the acquisition of the vessel MSC Mykonos (ex. Maersk Mykonos) (Fully repaid) [Member]

Loan for the acquisition of the vessels Gather Garden Genius I and Gifted [Member]

Loan for the acquisition of the vessels Gather Garden Genius I and Gifted Loan repayment following sale of vessel Garden [Member]

Loan for the acquisition of the vessels Gather Garden Genius I and Gifted Loan repayment folowing sale of vessel Gather [Member]

Loan for the acquisition of the vessels Gather, Garden, Genius I and Gifted- Loan repayment following sale of vessel Gifted and Genius I [Member]

Loan available for draw down (Vessels: MSC Romanos, MSC Methoni, MSC Ulsan, Koroni and Kyparissia) [Member]

Loan for the acquisition of the vessels MSC Romanos (tranche a) [Member]

Loan for the acquisition of the vessels MSC Methoni (tranche b) [Member]

Loan for the acquisition of the vessels MSC Ulsan (tranche c) [Member]

Loan for the acquisition of the vessel Koroni (tranche d) [Member]

Loan for the acquisition of the vessel Kyparissia (tranche e) [Member]

Loan for the acquisition and construction of H1068A, H1069A and H1070A (three tranches - one for each hull) [Member]

Loan for the acquisition and construction of H1068A, H1069A and H1070A - Hull H1068A (tranche a) [Member]

Loan for the acquisition and construction of H1068A, H1069A and H1070A - Hull H1069A (tranche b) [Member]

Loan for the acquisition and construction of H1068A, H1069A and H1070A - Hull H1070A (tranche c) [Member]

Loan for the acquisition and construction of S4010 and S4011 [Member]

Loan for the acquisition and construction of S4010 and S4011 (first drawdown) [Member]

Loan for the acquisition and construction of S4010 and S4011 (Drawdowns) [Member]

Loan for the acquisition and construction of S4010 and S4011 - MSC Athens (S4010) [Member]

Loan for the acquisition and construction of S4010 and S4011 - MSC Athos (S4011) [Member]

Loan for the acquisition and construction of S4020 S4022 and S4024 (three tranches one for each hull) [Member]

Loan for the acquisition and construction of S4020, S4022 and S4024 (Drawdowns) [Member]

Loan for the acquisition and construction of S4020, S4022 and S4024 - Valor (S4020) tranche a [Member]

Loan for the acquisition and construction of S4020, S4022 and S4024 - Valor (S4020) tranche b [Member]

Loan for the acquisition and construction of S4020, S4022 and S4024 - Valor (S4020) tranche c [Member]

Loan for the acquisition and construction of S4021 and S4023 (two tranches one for each hull) [Member]

Loan for the acquisition and construction of S4021 and S4023 (Drawdowns) [Member]

Loan for the acquisition and construction of S4021 and S4023 - Value [Member]

Loan for the acquisition and construction of S4021 and S4023 - Valence [Member]

Loan to partly finance the agreegate market value of eleven vessels [Member]

Supplemental agreement for the Loan to partly finance the agreegate market value of eleven vessels and partly finance the acquisition of the Stadt Luebeck [Member]

Long-term debt [Member]

Interest expense (including swap interest and interest capitalized) [Member]

Long term debt term loans [Line Items]

Maximum Borrowing Capacity

$150,000

$75,000

$150,000

$24,800

$90,000

$31,000

$30,000

$38,500

$42,000

$21,000

$7,470

Line of Credit Facility Initiation Date

'May 2008

'January 2008

'December 2007

'June 2006

'February 2006

'February 2005

'December 2009

Line of Credit Facility Remaining Borrowing Capacity

120,000

203,343

140,000

229,200

152,800

120,000

11,300

Percentage of the vessels contract price available for draw down

70.00%

Draw down amount up to the end of the period

48,765

26,740

80,220

26,740

168,080

38,200

22,920

15,280

106,960

30,560

113,700

11,300

Draw down date

'April 2011

'August 26, 2011

'October 25, 2011

'March 2012

'August 2012

Date of vessel's disposal

'December 2011

'March 2012

Delivery date

'March 14, 2013

'April 8, 2013

'June 3, 2013

'August 5, 2013

'November 8, 2013

'June 25, 2013

'September 2, 2013

Date of loan repayment

'November 16, 2012

'May 2012

Maximum borrowing capacity per vessel

75,000

Debt Instrument Carrying Amount

100,500

47,000

90,000

55,000

52,500

29,838

33,600

17,325

4,669

129,243

73,853

76,400

73,671

75,036

108,350

Loan repayment due to sale of vessels

2,921

3,479

6,958

Available period for draw down

'18 months

Number of outstanding installments

Line of Credit Facility Frequency of Payments

'semiannual

'quarterly

'semi-annual

'quarterly

Line of Credit Periodic Payment of Principal

4,500

6,000

2,500

962

1,050

525

467

1,412

4,457

1,273

1,364

Balloon payment

60,000

10,000

42,000

30,000

7,700

8,400

4,200

1,867

62,392

40,745

38,200

47,850

Line of Credit Final Payment of Principal

12,713

Line of Credit Payment of Principal remaining period

'May 2014 to May 2018

'February 2014 to February 2018

'June 2014 to December 2017

'February 2014 to August 2018

'February 2014 to February 2018

'February 2014 to August 2019

'January 2014 to October 2019

'February 2014 to February 2020

'February 2014 to May 2015

'January 2014 to January 2021

'January 2014 to April 2020

'March 2014 to June 2020

'February 2014 to November 2020

'March 2014 to June 2020

'February 2014 to August 2020

'March 2014 to December 2018

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

'1.25%-6.75%

'2.71%-6.75%

'1.21%-6.75%

Weighted average interest rates

4.30%

4.40%

4.80%

Interest expense excluding amortization

81,471

76,831

73,597

Interest costs capitalized

-11,098

-8,476

-5,525

11,098

8,476

5,525

Interest capitalized Advances for vessel acquisitions

-7,845

-5,280

-2,773

Net Settlements on Interest Rate Swaps Qualifying for Cash Flow Hedge

$3,253

$3,196

$2,752

($3,253)

($3,196)

($2,752)

Longterm_debtPrincipal_payment

Long-term debt-Principal payments (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Long Term Debt by Maturity [Abstract]	'	'
2014	$206,717	'
2015	211,445	'
2016	201,343	'
2017	243,343	'
2018	582,390	'
2019 and thereafter	422,338	'
Total	$1,867,576	$1,561,889

Recovered_Sheet2

Accrued charter revenue, current and non-current-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Charter Revenue Current and Non-Current [Abstract]	'	'
Accrued charter revenue, net	($16,896)	$288
Accrued charter revenue	409	5,100
Accrued charter revenue, non-current	10,264	13,422
Accrued charter revenue reductions	2,208	0
Charter revenue resulting from varying charter rates	$27,569	$18,234

Accrued_Charter_Revenue_Curren1

Accrued Charter Revenue, Current and Non-Current and Unearned Revenue, Current and Non-Current (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Net accrued charter revenue by maturities [Abstract]	'	'
2014	($1,996)	'
2015	-4,425	'
2016	-9,431	'
2017	-9,639	'
2018	-237	'
2019 and thereafter	8,832	'
Total	($16,896)	$288

Unearned_Revenue_Current_and_N

Unearned Revenue, Current and Non-current (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Unearned Revenue, Current and Non-Current [Abstract]	'	'
Hires collected in advance	$7,196	$4,002
Charter revenue resulting from varying charter rates	27,569	18,234
Total deferred revenue	34,765	22,236
Less current portion	-9,601	-5,595
Non-current portion	$25,164	$16,641

Commitments_and_Contitngencies

Commitments and Contitngencies - Long-Term Time Charters-Additional Information (Details)	12 Months Ended
	Dec. 31, 2013
Long-term time charters (including the charter agreements of vessels under construction) [Member]	'
Time charter arrangements remaining terms period	'up to 121 months
Number of unchartered vessels	1
Future minimum contractual charter revenues assumptions [Member]	'
Revenue days per annum	'365 days
Redelivery dates	'earliest possible redelivery dates

Commitments_and_Contitngencies1

Commitments and Contitngencies - Long-Term Time Charters (Table) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Unbilled Receivables not Billable at Balance Sheet Date [Abstract]	'
2014	$468,546
2015	446,855
2016	417,343
2017	371,709
2018	198,759
2019 and thereafter	429,611
Total	$2,332,823

Commitments_and_Contingencies_1

Commitments and Contingencies - Vessels Under Construction-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Number of shipbuilding contacts	3
Number of vessels under construction	3
Vessels under construction cost	$285,240
Total amount of contractual purchase obligation	57,048
Contractual obligation on JV newbuilds	$120,977
Number of JV newbuilds owned 49%	2
Number of JV newbuilds owned 25%	2

Recovered_Sheet3

Common stock Preferred stock and additional paid in capital-Additional Information (Details) (USD $)

12 Months Ended

6 Months Ended

10 Months Ended

3 Months Ended

7 Months Ended

10 Months Ended

12 Months Ended

In Thousands, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jul. 11, 2010

Jul. 20, 2010

Oct. 19, 2010

Jul. 12, 2010

Nov. 04, 2010

Mar. 27, 2012

Aug. 07, 2013

Oct. 19, 2012

Dec. 31, 2012

Dec. 31, 2013

Company's authorized capital stock [Member]

Authorized capital stock (amended articles of incorporation) [Member]

Company's IPO completion [Member]

Follow-on offering completion [Member]

Issuance of two million Series B Cumulative Redeemable Perpetual Preferred Stock [Member]

Second follow-on offering completion [Member]

Q4 2011 Dividends paid [Member]

Q1 2012 Dividends paid [Member]

Q2 2012 Dividends paid [Member]

Q3 2012 Dividends paid [Member]

Q4 2012 Dividends paid [Member]

Q1 2013 Dividends paid [Member]

Q2 2013 Dividends paid [Member]

Q3 2013 Dividends paid [Member]

August 6 to October 14, 2013 Preferred Dividends paid [Member]

Common stock authorization date

'July 14, 2010

Common stock shares authorized

2,000,000

1,000,000,000

Stock split date

'August 27, 2010

Common stock shares issued

1,000,000

24,000,000

22,000,000

13,300,000

7,500,000

7,000,000

Dividend per share

$0.88

$1.91

Preferred Stock Shares Issued

2,000,000

Preferred stock dividend rate

7.63%

Preferred Stock, Redemption Terms

'At any time after August 6, 2018, the Series B Preferred Stock may be redeemed, at Company's election at a price of $25 of liquidation preference per share.

Common Stock, Preferred Stock Issuance, value

$194,802

$2,400

Total Common stock shares issued as at period end.

25,000,000

60,300,000

67,800,000

74,800,000

Common stock shares par value

$0.00

Public offering per share price

$12

$14.10

$25

$14.10

Preferred Stock, Shares Authorized

100,000,000

Initial Public offering proceeds, net

145,543

Follow-on offering proceeds, net

100,584

48,042

93,547

Preferred stock shares designated as Series A Participating Preferred Stock

10,000,000

Preferred stock shares par value

$0.00

Dividends paid

($81,515)

($73,089)

($61,506)

$16,281

$18,306

$20,196

$731

Dividends paid, per common share

$0.27

$0.37

Earnings_Loss_per_share_Additi

Earnings/ (Loss) per share - Additional information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings per share, Basic [Abstract]:	'	'	'
Issuance date of Series B preferred stock	'August 2013	'	'
Preferred stock dividend rate	7.63%	'	'
Preferred Stock, Dividend Payment Terms	'Annual dividend of 7.625% in arrears on the 15th day of January, April, July and October of each year. Profit or loss attributable to common equity holders is adjusted by the contractual amount of dividends on Series B Preferred Stock that should be paid for the period.	'	'
Dividends paid and accrued during the year	$1,536	$0	$0

Earnings_Loss_per_share_Basic_1

Earnings/ (Loss) per share - Basic and Diluted (Table) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings per share, Basic EPS [Abstract]:	'	'	'
Net income	$103,087	$81,129	$87,592
Less paid and accrued earnings allocated to Preferred Stock	-1,536	0	0
Net income available to common stockholders	$101,551	$81,129	$87,592
Weighted average number of shares, basic	74,800,000	67,612,842	60,300,000
Earnings per common share	$1.36	$1.20	$1.45

Interest_and_Finance_Costs_Tab1

Interest and Finance Costs (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest and Debt Expense [Abstract]	'	'	'
Interest expense	$33,018	$28,485	$21,218
Interest capitalized	-11,098	-8,476	-5,525
Swap effect	48,453	48,346	52,379
Amortization and write off of financing costs	1,569	1,157	2,747
Commitment fees	2,283	4,921	4,369
Bank charges and other	308	301	253
Total	$74,533	$74,734	$75,441

TaxesAdditional_Information_De

Taxes-Additional Information (Details)	12 Months Ended
Taxes-Additional Information (Details)	Dec. 31, 2013
Income Tax Disclosure [Abstract]:	'
Applicable Tax	4.00%
US related gross transportation income that tax applies	50.00%
Ownership Income Tax Percentage	50.00%

Derivatives_Interest_Rate_Swap

Derivatives - Interest Rate Swap Agreements (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'
Notional Amount	$85,000	'
Fair value of financial instruments	-87,806	-158,946
Interest rate swap agreement 1 [member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Jun-08	'
Termination date	30-Jun-15	'
Notional Amount	425,000	'
Fixed rate	4.03%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-8,916	-18,407
Interest rate swap agreement 2 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Jun-08	'
Termination date	30-Jun-15	'
Notional Amount	75,000	'
Fixed rate	4.03%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-1,573	-3,248
Interest rate swap agreement 3 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Sep-08	'
Termination date	30-Jun-15	'
Notional Amount	100,000	'
Fixed rate	4.09%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-2,132	-4,403
Interest rate swap agreement 4 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Sep-08	'
Termination date	30-Jun-15	'
Notional Amount	250,000	'
Fixed rate	4.02%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-5,231	-10,775
Interest rate swap agreement 5 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	16-May-08	'
Termination date	16-May-14	'
Notional Amount	75,000	'
Fixed rate	3.88%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	-880	-2,671
Interest rate swap agreement 6 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	16-May-08	'
Termination date	16-May-14	'
Notional Amount	75,000	'
Fixed rate	3.88%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	-880	-2,671
Interest rate swap agreement 7 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	17-Jun-08	'
Termination date	17-Jun-13	'
Notional Amount	73,000	'
Fixed rate	3.57%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	0	-787
Interest rate swap agreement 8 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	17-Jun-08	'
Termination date	17-Jun-13	'
Notional Amount	73,000	'
Fixed rate	3.57%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	0	-787
Interest rate swap agreement 9 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	21-Feb-07	'
Termination date	21-Feb-17	'
Notional Amount	85,000	'
Fair value of financial instruments	-7,771	-11,122
Interest rate swap agreement 10 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	4-Aug-08	'
Termination date	5-Aug-13	'
Notional Amount	74,000	'
Fixed rate	3.60%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	0	-1,592
Interest rate swap agreement 11 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Jun-11	'
Termination date	29-Jun-18	'
Notional Amount	50,000	'
Fixed rate	3.45%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-12,933	-19,783
Interest rate swap agreement 12 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	30-Sep-11	'
Termination date	29-Jun-18	'
Notional Amount	20,000	'
Fixed rate	4.05%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-21,125	-26,075
Interest rate swap agreement 13 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	28-Sep-12	'
Termination date	29-Jun-18	'
Notional Amount	40,000	'
Fixed rate	3.60%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-3,737	-5,852
Interest rate swap agreement 14 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	22-Aug-11	'
Termination date	22-Aug-18	'
Notional Amount	65,000	'
Fixed rate	2.79%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	-3,015	-5,087
Interest rate swap agreement 15 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	31-Jan-13	'
Termination date	29-Jan-21	'
Notional Amount	133,700	'
Fixed rate	3.51%	'
Floating rate	'USD LIBOR 6M BBA	'
Fair value of financial instruments	-9,981	-16,672
Interest rate swap agreement 16 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Jan-14	'
Termination date	15-Jan-21	'
Notional Amount	67,781	'
Fixed rate	2.94%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-2,603	-4,931
Interest rate swap agreement 17 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Feb-14	'
Termination date	15-Feb-21	'
Notional Amount	67,781	'
Fixed rate	2.99%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-2,595	-4,990
Interest rate swap agreement 18 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Mar-14	'
Termination date	15-Mar-21	'
Notional Amount	67,781	'
Fixed rate	3.03%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-2,555	-5,019
Interest rate swap agreement 19 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	5-Apr-13	'
Termination date	6-Apr-20	'
Notional Amount	30,000	'
Fixed rate	2.39%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-754	-1,892
Interest rate swap agreement 20 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	17-Jun-13	'
Termination date	15-Jun-20	'
Notional Amount	30,000	'
Fixed rate	2.49%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-728	-1,949
Interest rate swap agreement 21 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Aug-13	'
Termination date	17-Aug-20	'
Notional Amount	30,000	'
Fixed rate	2.58%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-878	-2,009
Interest rate swap agreement 22 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Aug-13	'
Termination date	17-Aug-20	'
Notional Amount	30,000	'
Fixed rate	2.41%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-606	-1,751
Interest rate swap agreement 23 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	5-Apr-13	'
Termination date	6-Apr-20	'
Notional Amount	30,000	'
Fixed rate	2.24%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-522	-1,684
Interest rate swap agreement 24 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	17-Jun-13	'
Termination date	15-Jun-20	'
Notional Amount	30,000	'
Fixed rate	2.32%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-467	-1,703
Interest rate swap agreement 25 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	15-Aug-13	'
Termination date	17-Aug-20	'
Notional Amount	16,400	'
Fixed rate	2.46%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-374	-1,050
Interest rate swap agreement 26 [Member]	'	'
Derivative [Line Items]	'	'
Effective date	17-Jun-13	'
Termination date	15-Jun-20	'
Notional Amount	16,400	'
Fixed rate	2.38%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-304	-1,030
Interest rate swap agreement 27 [member]	'	'
Derivative [Line Items]	'	'
Effective date	5-Apr-13	'
Termination date	6-Apr-20	'
Notional Amount	16,400	'
Fixed rate	2.29%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	-325	-1,006
Interest rate swap agreement 28 [member]	'	'
Derivative [Line Items]	'	'
Effective date	28-Jun-13	'
Termination date	23-Jun-20	'
Notional Amount	76,400	'
Fixed rate	1.53%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	1,587	0
Interest rate swap agreement 29 [member]	'	'
Derivative [Line Items]	'	'
Effective date	28-Aug-13	'
Termination date	28-Aug-20	'
Notional Amount	76,400	'
Fixed rate	1.60%	'
Floating rate	'USD LIBOR 3M BBA	'
Fair value of financial instruments	1,492	0
Fair value of Company's interest rate swap agreements designed as hedging instruments [Member]	'	'
Derivative [Line Items]	'	'
Fair value of financial instruments	($87,806)	($158,946)

Derivatives_Interest_Rate_Swap1

Derivatives - Interest Rate Swap Agreement 9 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]:	'
Notional Amount	$85,000
Interest rate range	'2.23%-6.00%
Knock-in floor	2.23%
Struck	6.00%
Types of Interest Rate Derivatives Used	'ten-year zero cost collar agreement
Forward hedging period	'February 2007 to February 2017

Derivatives_not_Designated_as_

Derivatives not Designated as Hedging Instruments-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'
Notional Amount	$85,000	'
Interest rate swaps that do not meet the criteria for hedge accounting [Member]	'	'
Derivative [Line Items]	'	'
Notional Amount	100,000	'
Interest rate range	'1.37%-6.00%	'
Knock-in floor	1.37%	'
Struck	6.00%	'
Nine-Year Forward Hedging Period	'September 2008 to March 2017	'
Fair value as at the period end	$15,406	$21,865

Derivatives_Interest_Rate_Swap2

Derivatives - Interest Rate Swaps-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Rate Derivatives [Abstract]	'	'	'
Realized ineffectiveness of interest rate swaps	$254	$0	$0

Derivatives_Foreign_currency_a

Derivatives - Foreign currency agreements-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments and Hedging Activities Disclosure [Abstract]:	'	'	'
Number of foreign currency agreements (Euro/US dollar contracts)	0	2	16
Foreign currency agreements value	$0	$5,000	$25,000
Average forward rate	'	1.28	1.3422
Forward rate contract expiration frequency	'	'monthly intervals up to February 2013	'monthly intervals in2012
Gain (Loss) on derivative instruments from forward contracts	($165)	$1,149	($1,442)

Derivatives_in_ASC_815_Cash_Fl

Derivatives in ASC 815 Cash Flow Hedging Relationships (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]	'	'	'
Interest rate swaps	$27,964	($51,386)	($102,262)
Reclassification to Interest and Finance Costs	42,922	42,877	46,780
Total	70,886	-8,509	-55,482
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion) [Member]	'	'	'
Derivative [Line Items]	'	'	'
Interest rate swaps	27,964	-51,386	-102,262
Reclassification to Interest and Finance Costs	42,922	42,877	46,780
Total	70,886	-8,509	-55,482
Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion) [Member]	'	'	'
Derivative [Line Items]	'	'	'
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement	'Gain (Loss) on derivative instruments	'	'
Amount of Gain (Loss) recognized in income of derivative Ineffective Portion [Member]	'	'	'
Derivative [Line Items]	'	'	'
Interest rate swaps	254	0	0
Total	$254	$0	$0

Recovered_Sheet4

Derivatives - Not Designated as Hedging Instruments under ASC 815 (Table) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]	'	'	'
Forward contracts	($165)	$1,149	($1,442)
Gain /(Loss) on derivative instruments, net	6,548	-462	-8,709
Location of Gain (Loss) recognized on derivative [Member]	'	'	'
Derivative [Line Items]	'	'	'
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement	'Gain (Loss) on derivative instruments	'	'
Description of Location of Gain (Loss) on Cash Flow Hedge Ineffectiveness in Financial Statements	'Gain (Loss) on derivative instruments	'	'
Description of Location of Gain (Loss) on Foreign Currency Derivative in Financial Statements	'Gain (Loss) on derivative instruments	'	'
Amount of Gain (Loss) recognized in income on derivative [Member]	'	'	'
Derivative [Line Items]	'	'	'
Interest rate swaps	6,459	-1,611	-7,267
Gain Loss On Cash Flow Hedge Ineffectiveness, Net	254	0	0
Forward contracts	-165	1,149	-1,442
Gain /(Loss) on derivative instruments, net	$6,548	($462)	($8,709)

Financial_Instruments_Fair_val

Financial Instruments - Fair value-Additional Information (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value Disclosure [Abstract]:	'	'
Interest rate swaps-liability position, at fair value	$103,212	$180,811
Forward contracts-asset position	$0	$165

Financial_Instruments_Fair_val1

Financial Instruments - Fair value of Assets and Liabilities (Table) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivatives Fair Value [Line Items]	'	'
Interest rate swaps-liability position	($103,212)	($180,811)
Forward contracts-asset position	0	165
Total	-103,212	-180,646
Quoted Prices Active Markets for Identical Assets (Level 1) [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Interest rate swaps-liability position	0	0
Forward contracts-asset position	0	0
Total	0	0
Significant Other Observable Inputs (Level 2) [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Interest rate swaps-liability position	-103,212	-180,811
Forward contracts-asset position	0	165
Total	-103,212	-180,646
Unobservable Inputs (Level 3) [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Interest rate swaps-liability position	0	0
Forward contracts-asset position	0	0
Total	$0	$0

Comprehensive_Income_LossAddit

Comprehensive Income (Loss)-Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive Income (Loss) Disclosure [Abstract]	'	'	'
Other comprehensive loss for the year	$67,688	($11,705)	($58,242)
Comprehensive income (loss)	170,775	69,424	29,350
Interest rate swaps	27,964	-51,386	-102,262
Reclassification to Net Income	42,922	42,877	46,780
Reclassification adjustment for gain/ (loss) on available for sale securities in net income	0	0	-8
Net settlements on interest rate swaps qualifying for cash flow hedge	-3,253	-3,196	-2,752
Amounts reclassified from Net settlements on interest rate swaps qualifying for hedge accounting to Depreciation	($55)	$0	$0

Subsequent_EventsAdditional_In

Subsequent Events-Additional Information (Table) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013
Subsequent Event [Line Items]	'
Preferred stock dividend rate	7.63%
January 6, 2014, Dividend declared for fourth quarter of 2013 [Member]	'
Subsequent Event [Line Items]	'
Dividends payable, per share	0.27
Date of payment of dividends	4-Feb-14
Dividends date of record	21-Jan-14
January 2, 2014, Series B Preferred Stock Dividend declared for period October 15, 2013 to January 14, 2014 [Member]	'
Subsequent Event [Line Items]	'
Dividends payable, per share	0.476563
Date of payment of dividends	15-Jan-14
Dividends date of record	14-Jan-14
Preferred stock dividend rate	7.63%
January 21, 2014, Four million Series C Cumulative Redeemable Perpetual Preferred Stock offering [Member]	'
Subsequent Event [Line Items]	'
Preferred stock dividend rate	8.50%
Follow-on offering proceeds, net	96,440
Sale and lease back transaction - Delivery of the 9403 TEU, MSC Azov (Hull H1068A) [Member]	'
Subsequent Event [Line Items]	'
Sale Leaseback Transaction, Lease Terms	'The Company agreed with a financial institution to refinance the then outstanding balance of the loan relating to MSC Azov (Hull H1068A), under a ten-year sale and leaseback transaction. Under the sale and leaseback transaction, the vessel MSC Azov (Hull H1068A) was chartered back on a bareboat basis to Adele Shipping Co., wholly-owned subsidiary of the Company and remained on time charter to its current time charterer.
Delivery date	'January 14, 2014
Swap termination due to sale and leaseback transaction [Member]	'
Subsequent Event [Line Items]	'
Interest rate swap termination date	'January 14, 2014
Interest rate swap settlement amount	3,021
January 2014, Investments in Affiliates [Member]	'
Subsequent Event [Line Items]	'
Invested amount in affiliates for newbuilds	17,613
Invested amount in affiliates for swaption agreement	6,669