Equity Investments - Summary of Income Statement Information of Equity Method Investee (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified
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1 Months Ended |
3 Months Ended |
12 Months Ended |
6 Months Ended |
Mar. 31, 2013
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jul. 09, 2014
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Equity Investments |
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Rental income |
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$ 691,699us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
$ 763,262us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
$ 774,600us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
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Tenant reimbursements and other income |
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170,158eqc_TenantReimbursementsAndOtherRealEstateRevenue |
189,767eqc_TenantReimbursementsAndOtherRealEstateRevenue |
186,487eqc_TenantReimbursementsAndOtherRealEstateRevenue |
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Total revenues |
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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 |
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Operating expenses |
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387,982us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
410,045us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
397,673us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment |
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General and administrative |
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113,155us-gaap_GeneralAndAdministrativeExpense |
80,504us-gaap_GeneralAndAdministrativeExpense |
49,312us-gaap_GeneralAndAdministrativeExpense |
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Total expenses |
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913,741us-gaap_CostsAndExpenses |
849,522us-gaap_CostsAndExpenses |
682,917us-gaap_CostsAndExpenses |
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Operating (loss) income |
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(51,884)us-gaap_OperatingIncomeLoss |
103,507us-gaap_OperatingIncomeLoss |
278,170us-gaap_OperatingIncomeLoss |
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Interest and other income |
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1,561us-gaap_InterestAndOtherIncome |
1,229us-gaap_InterestAndOtherIncome |
1,410us-gaap_InterestAndOtherIncome |
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Interest expense |
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(143,230)us-gaap_InterestExpense |
(173,011)us-gaap_InterestExpense |
(202,055)us-gaap_InterestExpense |
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Gain (loss) on early extinguishment of debt |
(60,000)us-gaap_GainsLossesOnExtinguishmentOfDebt |
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4,909us-gaap_GainsLossesOnExtinguishmentOfDebt |
(60,052)us-gaap_GainsLossesOnExtinguishmentOfDebt |
(287)us-gaap_GainsLossesOnExtinguishmentOfDebt |
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(Loss) income from continuing operations before income tax expense and equity in earnings of investees |
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(63)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
(62,034)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
84,484us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
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Income tax (expense) benefit |
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(3,191)us-gaap_IncomeTaxExpenseBenefit |
(2,634)us-gaap_IncomeTaxExpenseBenefit |
(3,207)us-gaap_IncomeTaxExpenseBenefit |
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Equity in earnings of an investee |
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24,460us-gaap_IncomeLossFromEquityMethodInvestments |
25,754us-gaap_IncomeLossFromEquityMethodInvestments |
11,420us-gaap_IncomeLossFromEquityMethodInvestments |
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Income (loss) from continuing operations |
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21,206us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |
(38,914)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |
92,697us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |
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Net income (loss) |
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24,012us-gaap_ProfitLoss |
(156,967)us-gaap_ProfitLoss |
(79,845)us-gaap_ProfitLoss |
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GOV |
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Equity Investments |
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Rental income |
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203,700us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Operating expenses |
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75,326us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Depreciation and amortization |
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49,070us-gaap_DepreciationAndAmortization / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Acquisition related costs |
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1,614us-gaap_AcquisitionCosts / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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General and administrative |
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11,924us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Total expenses |
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137,934us-gaap_CostsAndExpenses / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Operating (loss) income |
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65,766us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Interest and other income |
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29us-gaap_InterestAndOtherIncome / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Interest expense |
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(16,892)us-gaap_InterestExpense / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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(Loss) income from continuing operations before income tax expense and equity in earnings of investees |
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48,903us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Income tax (expense) benefit |
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(159)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Equity in earnings of an investee |
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316us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Income (loss) from continuing operations |
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49,060us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Income from discontinued operations |
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900us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Net income (loss) |
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49,960us-gaap_ProfitLoss / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Weighted average common shares outstanding (in shares) |
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48,617us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Income from continuing operations (in dollars per share) |
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$ 1.01us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Income from discontinued operations (in dollars per share) |
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$ 0.02us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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Net income per common share (in dollars per share) |
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$ 1.03us-gaap_EarningsPerShareBasic / dei_LegalEntityAxis = eqc_GovernmentPropertiesIncomeTrustMember |
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SIR |
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Equity Investments |
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Rental income |
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159,011us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
105,559us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
98,226us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Tenant reimbursements and other income |
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29,312eqc_TenantReimbursementsAndOtherRealEstateRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
17,231eqc_TenantReimbursementsAndOtherRealEstateRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
16,980eqc_TenantReimbursementsAndOtherRealEstateRevenue / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Total revenues |
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188,323us-gaap_RealEstateRevenueNet / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
122,790us-gaap_RealEstateRevenueNet / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
115,206us-gaap_RealEstateRevenueNet / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Operating expenses |
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36,382us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
23,796us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
20,982us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Depreciation and amortization |
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31,091us-gaap_DepreciationAndAmortization / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
14,860us-gaap_DepreciationAndAmortization / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
20,832us-gaap_DepreciationAndAmortization / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Acquisition related costs |
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2,002us-gaap_AcquisitionCosts / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
2,470us-gaap_AcquisitionCosts / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
374us-gaap_AcquisitionCosts / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
General and administrative |
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12,423us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
8,203us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
7,731us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Total expenses |
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81,898us-gaap_CostsAndExpenses / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
49,329us-gaap_CostsAndExpenses / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
49,919us-gaap_CostsAndExpenses / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Operating (loss) income |
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106,425us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
73,461us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
65,287us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Interest expense |
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(13,763)us-gaap_InterestExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
(7,565)us-gaap_InterestExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
(7,287)us-gaap_InterestExpense / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Gain (loss) on early extinguishment of debt |
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0us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
0us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
243us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
(Loss) income from continuing operations before income tax expense and equity in earnings of investees |
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92,662us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
65,896us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
58,243us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Income tax (expense) benefit |
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96us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
(290)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
(90)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Equity in earnings of an investee |
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334us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
269us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
32us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Net income (loss) |
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$ 93,092us-gaap_ProfitLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
$ 65,875us-gaap_ProfitLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
$ 58,185us-gaap_ProfitLoss / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Weighted average common shares outstanding (in shares) |
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44,565us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
27,122us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
52,394us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
Net income per common share (in dollars per share) |
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$ 2.09us-gaap_EarningsPerShareBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
$ 2.43us-gaap_EarningsPerShareBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |
$ 1.11us-gaap_EarningsPerShareBasic / dei_LegalEntityAxis = eqc_SelectIncomeREITMember |