Subsequent events, textuals (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
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

The date of record of the shareholders entitled to receive dividends.

No definition available.

Name:	dcix_SubsequentEventDividendsEntitledShareholdersDateOfRecord
Namespace Prefix:	dcix_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount per share of dividends to be paid.

+ References

No definition available.

+ Details

Name:	dcix_SubsequentEventDividendsPayableAmountPerShare
Namespace Prefix:	dcix_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- 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

- 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_SubsequentEventsDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration