Above / Below Market Acquired Time Charters / Other Intangible Assets (Details) (USD $)	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012
Property Plant And Equipment [Line Items]
Fair value of above market acquired time charter at acquisition		$ 22,149,258
Fair value of below market acquired time charter at acquisition		4,020,335
Amortization of above market acquired time charters	3,289,855	1,698,834
Amortization of below market acquired time charters	678,142	681,888
OOCL Hong Kong and OOCL China
Property Plant And Equipment [Line Items]
Amortization of other intangible assets	523,828	0
Other intangible assets relating to attached manning agreements		$ 3,169,014
Other intangible assets amortization period	3 years 0 months 0 days

Aggregate amount of above market acquired time charter amortization recognized during the period.

No definition available.

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- Definition

Aggregate amount of below market acquired time charter accretion recognized during the period.

+ References

No definition available.

+ Details

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of the asset arising from the market value of the time charter contract assumed from a vessel acquisition.

+ References

No definition available.

+ Details

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of the liability arising from the market value of the time charter assumed from a vessel acquisition.

+ References

No definition available.

+ Details

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- Definition

The aggregate expense charged against earnings to allocate the cost of acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

+ References

No definition available.

+ Details

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of intangible assets not otherwise specified in the taxonomy having a reasonably expected period of economic benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

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