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Supplemental Cash Flow Information (Details) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Supplemental Cash Flow Information [Abstract] |  |
Cash paid for interest | $ 58,000us-gaap_InterestPaid | $ 69,000us-gaap_InterestPaid
Non-cash investing and financing activities: |  |
Loss from change in fair value of interest rate swap derivatives | (16,000)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments | (10,000)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Accrued liabilities with related parties settled with equity |  | 134,000dss_SettlementOfAccruedLiabilitiesWithRelatedPartiesWithEquity
Financing of building improvements |  | 200,000dss_FinancingOfBuildingImprovements
Change in non-controlling interest |  | $ 820,000us-gaap_MinorityInterestChangeInRedemptionValue

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- Definition Represents the amount of financing of building improvements in noncash investing or financing activities. + References No definition available. + Details
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- Definition Amount of accrued liabilities with related parties settled through noncash transactions with equity. + References No definition available. + Details
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- Details
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- Definition Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest. + References No definition available. + Details
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