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Income taxes, textuals (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Income Tax Uncertainties [Abstract] |  |  |
Minimum Stock Ownership Percentage For Tax Exemption | 50.00% |  |
Minimum Vote And Value Percentage Of Regularly Traded Stock | 50.00% |  |
Significant Shareholder Percentage | 5.00% |  |
Unrecognised Tax Expense For Tax Exempt Entity | $ 459 | $ 22 | $ 8

X
- Definition The percentage of the value of the Company's common stock that is owned, directly or indirectly, by "qualified shareholders". + References No definition available. + Details
Name: | dcix_MinimumStockOwnershipPercentageForTaxExemption
Namespace Prefix: | dcix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership in the vote and value of the Company's outstanding shares for more than half of the days of the taxable year, needed for the "5 Percent Ovverride Rule". + References No definition available. + Details
Name: | dcix_MinimumVoteAndValuePercentageOfRegularlyTradedStock
Namespace Prefix: | dcix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of personal onwership in the vote and value of a specific class of the Company's outstanding shares, needed for the "5 Percent Override Rule". + References No definition available. + Details
Name: | dcix_SignificantShareholderPercentage
Namespace Prefix: | dcix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The estimated tax expense not recorded by the company due to tax exemption. + References No definition available. + Details
Name: | dcix_UnrecognisedTaxExpenseForTaxExemptEntity
Namespace Prefix: | dcix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration