Real Estate Properties - Schedule of Disposal Groups, Including Discontinued Operations, Income Statement and Additional Disclosures (Details) (USD $) In Thousands, unless otherwise specified
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3 Months Ended |
12 Months Ended |
Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Statements of Operations: |
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Rental income |
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$ 691,699us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
$ 763,262us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
$ 774,600us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
Tenant reimbursements and other income |
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170,158eqc_TenantReimbursementsAndOtherRealEstateRevenue |
189,767eqc_TenantReimbursementsAndOtherRealEstateRevenue |
186,487eqc_TenantReimbursementsAndOtherRealEstateRevenue |
Total revenues |
212,808us-gaap_RealEstateRevenueNet |
216,595us-gaap_RealEstateRevenueNet |
215,194us-gaap_RealEstateRevenueNet |
217,260us-gaap_RealEstateRevenueNet |
214,028us-gaap_RealEstateRevenueNet |
214,201us-gaap_RealEstateRevenueNet |
262,188us-gaap_RealEstateRevenueNet |
262,612us-gaap_RealEstateRevenueNet |
861,857us-gaap_RealEstateRevenueNet |
953,029us-gaap_RealEstateRevenueNet |
961,087us-gaap_RealEstateRevenueNet |
Operating expenses |
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387,982us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
410,045us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
397,673us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
Depreciation and amortization |
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227,532us-gaap_DepreciationDepletionAndAmortization |
234,402us-gaap_DepreciationDepletionAndAmortization |
230,284us-gaap_DepreciationDepletionAndAmortization |
General and administrative |
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113,155us-gaap_GeneralAndAdministrativeExpense |
80,504us-gaap_GeneralAndAdministrativeExpense |
49,312us-gaap_GeneralAndAdministrativeExpense |
Total expenses |
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913,741us-gaap_CostsAndExpenses |
849,522us-gaap_CostsAndExpenses |
682,917us-gaap_CostsAndExpenses |
Operating (loss) income |
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(51,884)us-gaap_OperatingIncomeLoss |
103,507us-gaap_OperatingIncomeLoss |
278,170us-gaap_OperatingIncomeLoss |
Interest and other income |
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1,561us-gaap_InterestAndOtherIncome |
1,229us-gaap_InterestAndOtherIncome |
1,410us-gaap_InterestAndOtherIncome |
Interest expense |
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(143,230)us-gaap_InterestExpense |
(173,011)us-gaap_InterestExpense |
(202,055)us-gaap_InterestExpense |
(Loss) income from discontinued operations |
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8,389us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax |
6,393us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax |
(4,341)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax |
Discontinued operations, properties sold or held for sale |
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Statements of Operations: |
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Rental income |
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14,243us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
55,073us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
69,752us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Tenant reimbursements and other income |
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1,900eqc_TenantReimbursementsAndOtherRealEstateRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
6,842eqc_TenantReimbursementsAndOtherRealEstateRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
8,156eqc_TenantReimbursementsAndOtherRealEstateRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Total revenues |
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16,143us-gaap_RealEstateRevenueNet / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
61,915us-gaap_RealEstateRevenueNet / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
77,908us-gaap_RealEstateRevenueNet / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Operating expenses |
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7,138us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
37,027us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
46,705us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Depreciation and amortization |
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0us-gaap_DepreciationDepletionAndAmortization / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
12,550us-gaap_DepreciationDepletionAndAmortization / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
28,008us-gaap_DepreciationDepletionAndAmortization / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
General and administrative |
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10us-gaap_GeneralAndAdministrativeExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
4,268us-gaap_GeneralAndAdministrativeExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
5,420us-gaap_GeneralAndAdministrativeExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Total expenses |
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7,148us-gaap_CostsAndExpenses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
53,845us-gaap_CostsAndExpenses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
80,133us-gaap_CostsAndExpenses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Operating (loss) income |
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8,995us-gaap_OperatingIncomeLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
8,070us-gaap_OperatingIncomeLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
(2,225)us-gaap_OperatingIncomeLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Interest and other income |
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2us-gaap_InterestAndOtherIncome / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
65us-gaap_InterestAndOtherIncome / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
73us-gaap_InterestAndOtherIncome / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Interest expense |
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(608)us-gaap_InterestExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
(1,742)us-gaap_InterestExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
(2,189)us-gaap_InterestExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
(Loss) income from discontinued operations |
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$ 8,389us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
$ 6,393us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |
$ (4,341)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |