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Earnings per share, detail (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income / (loss)	$ 3,238us-gaap_NetIncomeLoss	$ (57,346)us-gaap_NetIncomeLoss	$ 5,969us-gaap_NetIncomeLoss
Weighted Average Number Of Share Outstanding Basic And Diluted	51,645,071us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	33,159,328us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	26,934,533us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Earnings Per Share, Basic and Diluted	$ 0.06us-gaap_EarningsPerShareBasicAndDiluted	$ (1.73)us-gaap_EarningsPerShareBasicAndDiluted	$ 0.22us-gaap_EarningsPerShareBasicAndDiluted
[EarningsLossPerShareBasicMember]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income / (loss)	3,238us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	(57,346)us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	5,969us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Distributed earnings allocated to restricted shares	(50)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	0us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	(104)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Net Income / (loss) Available to Common Stockholders	3,188us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	(57,346)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	5,865us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Weighted average number of common shares, basic	51,645,071us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	33,159,328us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	26,934,533us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Effect of dilutive restricted shares	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Weighted average number of common shares, diluted	51,645,071us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	33,159,328us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	26,934,533us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
Earnings Per Share, Basic and Diluted	$ 0.06us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	$ (1.73)us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember	$ 0.22us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareBasicMember
[EarningsLossPerShareDilutedMember]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income / (loss)	3,238us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	(57,346)us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	5,969us-gaap_NetIncomeLoss / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Distributed earnings allocated to restricted shares	(50)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	0us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	(104)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Net Income (Loss) Available to Common Stockholders, Diluted	$ 3,188us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	$ (57,346)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	$ 5,865us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Weighted average number of common shares, basic	51,645,071us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	33,159,328us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	26,934,533us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Effect of dilutive restricted shares	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Weighted average number of common shares, diluted	51,645,071us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	33,159,328us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	26,934,533us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember
Earnings Per Share, Basic and Diluted	$ 0.06us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	$ (1.73)us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember	$ 0.22us-gaap_EarningsPerShareBasicAndDiluted / dcix_EffectsOfIncrementalSharesAxis = dcix_EarningsLossPerShareDilutedMember

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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