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Subsequent events, textuals (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
[DividendDeclaredMember] |
Subsequent Event [Line Items] |
Subsequent Event, Date | Feb. 19, 2013
Subsequent Event, Amount | $ 9,658
Dividend per share | $ 0.3
Dividend Payment Date | Mar. 21, 2013
Record date of shareholders | Mar. 05, 2013
[AcquisitionOfNewVesselMember] |
Subsequent Event [Line Items] |
Subsequent Event, Date | Feb. 19, 2013
Subsequent Event, Amount | $ 22,000

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- Definition The date of record of the shareholders entitled to receive dividends. + References No definition available. + Details
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Namespace Prefix: | dcix_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount per share of dividends to be paid. + References No definition available. + Details
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Namespace Prefix: | dcix_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition The date at which or close to which the dividend will be paid. + References No definition available. + Details
Name: | dcix_SubsequentEventDividendsPaymentDate
Namespace Prefix: | dcix_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the known or estimated financial effect of the event, or transaction that occurred between the balance sheet date and the date the financial statements are issued or available to be issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 165 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_SubsequentEventAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Period Type: | duration

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- Definition Date the event occurred after the balance sheet date but before financial statements are issues or available to be issued, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration