Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities:
Net (loss) / income	$ (11,723)us-gaap_NetIncomeLoss	$ 1,850us-gaap_NetIncomeLoss	$ (314,521)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	37,150us-gaap_Depreciation	16,061us-gaap_Depreciation	33,045us-gaap_Depreciation
Amortization of fair value of above market acquired time charters (Note 7)	6,113	6,352	6,369
Amortization of deferred finance charges (Note 9)	681us-gaap_AmortizationOfFinancingCosts	522us-gaap_AmortizationOfFinancingCosts	502us-gaap_AmortizationOfFinancingCosts
Loss on debt extinguishment (Note 9)	652	0	0
Vessels' impairment loss (Note 19)	0us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges	303,219us-gaap_AssetImpairmentCharges
Loss on sale of vessel (Note 5)	0	87	3,190
Stock-based compensation (Note 14)	5,834us-gaap_ShareBasedCompensation	1,488us-gaap_ShareBasedCompensation	1,546us-gaap_ShareBasedCompensation
Change in fair value of derivatives (Note 19)	1,717us-gaap_UnrealizedGainLossOnDerivatives	(91)us-gaap_UnrealizedGainLossOnDerivatives	(82)us-gaap_UnrealizedGainLossOnDerivatives
Other non-cash charges	66us-gaap_OtherNoncashIncomeExpense	38us-gaap_OtherNoncashIncomeExpense	67us-gaap_OtherNoncashIncomeExpense
Bad debt expense	215us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts
Gain from insurance claim	(237)sblk_GainFromInsuranceClaim	(1,030)sblk_GainFromInsuranceClaim	(812)sblk_GainFromInsuranceClaim
Gain from bargain purchase (Note 1)	(12,318)	0	0
Write-off of liability in other operational gain (non cash gain) (Note 11)	(1,361)sblk_GainFromWriteOffLiability	0sblk_GainFromWriteOffLiability	0sblk_GainFromWriteOffLiability
Equity in income of investee (Note 3)	(106)	0	0
Changes in operating assets and liabilities:
Restricted cash for forward freight and bunker derivatives	0	0	153
Trade accounts receivable	(16,057)	2,766	(1,207)
Inventories	(5,409)us-gaap_IncreaseDecreaseInInventories	1,887us-gaap_IncreaseDecreaseInInventories	254us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(2,328)	(131)	(8,581)
Due from related parties	287	(339)	(147)
Due from managers	0	0	(11)
Accounts payable	1,995	(1,626)	(237)
Due to related parties	(449)	297	(174)
Accrued liabilities	6,713	350	(719)
Due to managers	0	0	(48)
Deferred revenue	1,384	(986)	(2,807)
Net cash provided by Operating Activities	12,819	27,495	18,999
Cash Flows from Investing Activities:
Advances for vessels under construction and acquisition of vessels and other assets	(518,447)	(127,814)	(91)
Cash paid for above market acquired time charters (Note 7)	(4,856)	0	0
Cash proceeds from vessel sale (Note 5)	1,100	8,267	7,962
Long term investment (Note 3)	(200)	0	0
Cash received from Merger & Pappas Transaction (Note 1)	96,268us-gaap_CashAcquiredFromAcquisition	0us-gaap_CashAcquiredFromAcquisition	0us-gaap_CashAcquiredFromAcquisition
Hull and Machinery Insurance proceeds	550	4,265	6,983
Decrease in restricted cash	35us-gaap_DecreaseInRestrictedCash	7,664us-gaap_DecreaseInRestrictedCash	2,579us-gaap_DecreaseInRestrictedCash
Increase in restricted cash	(11,525)us-gaap_IncreaseInRestrictedCash	0us-gaap_IncreaseInRestrictedCash	(195)us-gaap_IncreaseInRestrictedCash
Net cash provided by / (used in) Investing Activities	(437,075)	(107,618)	17,238
Cash Flows from Financing Activities:
Proceeds from bank loans and 8.00% 2019 Notes	637,207us-gaap_ProceedsFromIssuanceOfDebt	0us-gaap_ProceedsFromIssuanceOfDebt	0us-gaap_ProceedsFromIssuanceOfDebt
Loan prepayments and repayments	(173,986)us-gaap_RepaymentsOfDebt	(33,780)us-gaap_RepaymentsOfDebt	(42,026)us-gaap_RepaymentsOfDebt
Financing fees paid	(6,513)us-gaap_PaymentsOfFinancingCosts	(271)us-gaap_PaymentsOfFinancingCosts	(91)us-gaap_PaymentsOfFinancingCosts
Proceeds from issuance of common stock	0	150,905	0
Offering expenses paid related to the issuance of common stock	0us-gaap_PaymentsOfStockIssuanceCosts	(4,883)us-gaap_PaymentsOfStockIssuanceCosts	0us-gaap_PaymentsOfStockIssuanceCosts
Repurchase of common shares	0	0	(861)
Cash dividend	0us-gaap_PaymentsOfDividendsCommonStock	0us-gaap_PaymentsOfDividendsCommonStock	(3,631)us-gaap_PaymentsOfDividendsCommonStock
Net cash (used in) / provided by Financing Activities	456,708	111,971	(46,609)
Net (decrease) / increase in cash and cash equivalents	32,452	31,848	(10,372)
Cash and cash equivalents at beginning of year	53,548	21,700	32,072
Cash and cash equivalents at end of the year	86,000	53,548	21,700
SUPPLEMENTAL CASH FLOW INFORMATION
Interest, net of amount capitalized	$ 5,803us-gaap_InterestPaidNet	$ 6,156us-gaap_InterestPaidNet	$ 7,612us-gaap_InterestPaidNet

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (SX 210.7-04.19)

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-Number 210

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Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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- Definition

The cash outflow for loan and debt issuance costs.

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-Publisher FASB

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, beyond the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the long-term.

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No definition available.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to investments, for example fixed assets. It excludes insurance settlements classified as operating cash flows.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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No definition available.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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No definition available.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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