Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Net income (loss)	$ 15,995us-gaap_ProfitLoss	$ (3,903)us-gaap_ProfitLoss	$ (53,429)us-gaap_ProfitLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	19,561us-gaap_Depreciation	11,079us-gaap_Depreciation	20,485us-gaap_Depreciation
Amortization of deferred charges	685us-gaap_AmortizationOfFinancingCosts	558us-gaap_AmortizationOfFinancingCosts	879us-gaap_AmortizationOfFinancingCosts
Net (gain) loss on sale of assets	0	(254)	13,088
Impairment loss on vessels	0us-gaap_AssetImpairmentCharges	5,342us-gaap_AssetImpairmentCharges	41,597us-gaap_AssetImpairmentCharges
Amortization of time charter contract value	0vlccf_AmotizationOfTimeCharter	0vlccf_AmotizationOfTimeCharter	2,303vlccf_AmotizationOfTimeCharter
Restricted stock unit expense	242	919	906
Provision for doubtful accounts	0us-gaap_ProvisionForDoubtfulAccounts	226us-gaap_ProvisionForDoubtfulAccounts	10,155us-gaap_ProvisionForDoubtfulAccounts
Changes in operating assets and liabilities:
Trade accounts receivable	528	(1,422)	(4,536)
Related party balances	622	0	(319)
Other receivables	(2,487)	1,748	983
Inventories, net of disposals	(11,514)us-gaap_IncreaseDecreaseInInventories	(1,189)us-gaap_IncreaseDecreaseInInventories	1,535us-gaap_IncreaseDecreaseInInventories
Voyages in progress	(1,322)	0	931
Prepaid expenses and accrued income	(323)	95	1,952
Trade accounts payable	1,862	153	(943)
Accrued expenses	1,354	(392)	(2,400)
Deferred charter revenue	(339)	(647)	3,612
Net cash provided by operating activities	24,864	12,313	36,799
Investing activities
Placement of restricted cash	(3,924)us-gaap_IncreaseInRestrictedCash	0us-gaap_IncreaseInRestrictedCash	0us-gaap_IncreaseInRestrictedCash
Additions to newbuildings	(357,402)vlccf_PaymentsToAcquireNewbuildings	(26,706)vlccf_PaymentsToAcquireNewbuildings	0vlccf_PaymentsToAcquireNewbuildings
Cash acquired upon purchase of SPCs	68,560vlccf_CashAcquiredfromAssetAcquisition	0vlccf_CashAcquiredfromAssetAcquisition	0vlccf_CashAcquiredfromAssetAcquisition
Purchase of vessels	(24,085)	0	0
Proceeds from sale of assets	0	17,075	66,993
Net cash (used in) provided by investing activities	(316,851)	(9,631)	66,993
Financing activities
Proceeds from long-term debt	270,000	0	0
Repayment of long-term debt	(1,500)us-gaap_RepaymentsOfLongTermDebt	(16,678)us-gaap_RepaymentsOfLongTermDebt	(42,062)us-gaap_RepaymentsOfLongTermDebt
Debt fees paid	(3,555)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Net proceeds from share issuance	0	51,167	0
Distributions to shareholders	(28,987)us-gaap_PaymentsOfOrdinaryDividends	(18,180)us-gaap_PaymentsOfOrdinaryDividends	(29,319)us-gaap_PaymentsOfOrdinaryDividends
Net cash provided by (used in) financing activities	235,958	16,309	(71,381)
Net change in cash and cash equivalents	(56,029)	18,991	32,411
Cash and cash equivalents at beginning of year	98,250	79,259	46,848
Cash and cash equivalents at end of year	42,221	98,250	79,259
Supplemental disclosure of cash flow information:
Interest paid, net of capitalized interest	$ 5,848us-gaap_InterestPaidNet	$ 2,851us-gaap_InterestPaidNet	$ 4,477us-gaap_InterestPaidNet

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-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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- Details

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- Definition

Amotization of Time Charter

+ References

No definition available.

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- Definition

Cash Acquired from Asset Acquisition

+ References

No definition available.

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- Definition

The noncash inflow/outflow expense that represents the cost of restricted stock or unit distributed to employees as compensation.

+ References

No definition available.

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- Definition

The net change during the reporting period of voyages in progress that are expected to be completed within one year (or the normal operating cycle, if longer).

+ References

No definition available.

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- Definition

The cash outflow associated with the capital expenditure for the construction of new vessels

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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