$EQC
Equity Commonwealth Stock $eqc

$eqc Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000080364924000025 Filed on February 13, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$15.19M	$15.15M	$60.52M
YoY Change	-2.48%	-4.06%	-4.14%
Cost Of Revenue	$6.534M	$6.542M	$27.46M
YoY Change	-9.95%	-6.36%	13.55%
Gross Profit	$8.656M	$8.604M	$33.06M
YoY Change	4.04%	-2.24%	-15.13%
Gross Profit Margin	56.98%	56.81%	54.63%
Selling, General & Admin	$8.323M	$7.504M	$36.97M
YoY Change	-2.71%	5.14%	21.71%
% of Gross Profit	96.15%	87.22%	111.83%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.626M	$3.514M	$17.44M
YoY Change	-15.87%	-11.33%	-2.06%
% of Gross Profit	41.89%	40.84%	52.76%
Operating Expenses	$12.68M	$11.69M	$54.42M
YoY Change	-1.44%	-0.71%	12.93%
Operating Profit	-$4.024M	-$3.084M	-$21.36M
YoY Change	-11.46%	3.84%	131.33%
Interest Expense	$29.51M	$29.67M	$114.7M
YoY Change	4.0%	22.28%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$25.49M	$26.59M	$93.31M
YoY Change	6.95%	24.82%	146.79%
Income Tax	$30.00K	-$40.00K	$1.866M
% Of Pretax Income	0.12%	-0.15%	2.0%
Net Earnings	$23.41M	$24.55M	$91.16M
YoY Change	3.19%	30.06%	144.65%
Net Earnings / Revenue	154.1%	162.1%	150.62%
Basic Earnings Per Share
Diluted Earnings Per Share	$0.22	$0.23	$0.75
COMMON SHARES
Basic Shares Outstanding	107.0M shares	106.7M shares	108.8M shares
Diluted Shares Outstanding	108.2M shares		110.2M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.171B	$2.161B	$2.161B
YoY Change	1.98%	-16.33%	-16.33%
Cash & Equivalents	$2.171B	$2.200B	$2.161B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$16.59M	$15.74M	$15.74M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.187B	$2.176B	$2.176B
YoY Change	2.01%	-16.24%	-16.24%
LONG-TERM ASSETS
Property, Plant & Equipment	$235.3M	$231.4M	$231.4M
YoY Change	-0.63%	-3.03%	-3.03%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets	$252.3M	$248.8M	$248.8M
YoY Change	-1.09%	-3.07%	-3.07%
TOTAL ASSETS
Total Short-Term Assets	$2.187B	$2.176B	$2.176B
Total Long-Term Assets	$252.3M	$248.8M	$248.8M
Total Assets	$2.440B	$2.425B	$2.425B
YoY Change	1.68%	-15.06%	-15.06%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$20.83M	$27.30M	$27.30M
YoY Change	6.06%	5.26%	5.26%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$24.19M	$32.94M	$32.94M
YoY Change	-11.83%	14.38%	14.38%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$2.166M	$1.990M	$1.990M
YoY Change	-23.06%	-15.5%	-15.5%
Total Long-Term Liabilities	$2.166M	$1.990M	$1.990M
YoY Change	-23.06%	-15.5%	-15.5%
TOTAL LIABILITIES
Total Short-Term Liabilities	$24.19M	$32.94M	$32.94M
Total Long-Term Liabilities	$2.166M	$1.990M	$1.990M
Total Liabilities	$31.33M	$34.93M	$39.97M
YoY Change	3.58%	12.12%	4.22%
SHAREHOLDERS EQUITY
Retained Earnings	$3.952B	$3.927B
YoY Change	2.43%	2.38%
Common Stock	$3.937B	$3.937B
YoY Change	-1.03%	-1.1%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.408B	$2.385B	$2.385B
YoY Change
Total Liabilities & Shareholders Equity	$2.440B	$2.425B	$2.425B
YoY Change	1.68%	-15.06%	-15.06%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$23.41M	$24.55M	$91.16M
YoY Change	3.19%	30.06%	144.65%
Depreciation, Depletion And Amortization	$3.626M	$3.514M	$17.44M
YoY Change	-15.87%	-11.33%	-2.06%
Cash From Operating Activities	$22.44M	$35.87M	$122.3M
YoY Change	-2.88%	9.83%	87.99%
INVESTING ACTIVITIES
Capital Expenditures	$5.055M	$1.091M	$5.691M
YoY Change	330.21%	181.19%	59.1%
Acquisitions
YoY Change
Other Investing Activities		$0.00	$0.00
YoY Change		-100.0%	-100.0%
Cash From Investing Activities	-$5.055M	-$1.091M	-$5.691M
YoY Change	330.21%	186.35%	63.53%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$60.20M
YoY Change			-62.35%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-7.089M	-1.964M	-$538.3M
YoY Change	-98.51%	-98.62%	92.01%
NET CHANGE
Cash From Operating Activities	22.44M	35.87M	$122.3M
Cash From Investing Activities	-5.055M	-1.091M	-$5.691M
Cash From Financing Activities	-7.089M	-1.964M	-$538.3M
Net Change In Cash	10.30M	32.81M	-$421.7M
YoY Change	-102.27%	-129.79%	92.75%
FREE CASH FLOW
Cash From Operating Activities	$22.44M	$35.87M	$122.3M
Capital Expenditures	$5.055M	$1.091M	$5.691M
Free Cash Flow	$17.39M	$34.78M	$116.6M
YoY Change	-20.72%	7.77%	89.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	83176000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29275000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111674000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	121411000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	121411000	shares
CY2022	us-gaap	Real Estate Improvements RealEstateImprovements	4000000	usd
CY2023	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2022	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	97000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-16309000	usd
CY2023	us-gaap	Variable Lease Income VariableLeaseIncome	19328000	usd
CY2022	us-gaap	Variable Lease Income VariableLeaseIncome	20917000	usd
CY2023	us-gaap	Lease Income LeaseIncome	55336000	usd
CY2022	us-gaap	Lease Income LeaseIncome	58763000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000803649
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	1-9317
CY2023	dei	Entity Registrant Name EntityRegistrantName	EQUITY COMMONWEALTH
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	04-6558834
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	Two North Riverside Plaza, Suite 2000
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Chicago
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60606
CY2023	dei	City Area Code CityAreaCode	(312)
CY2023	dei	Local Phone Number LocalPhoneNumber	646-2800
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	2200000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	106991322	shares
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Firm AuditorFirmId	42
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	Chicago, Illinois
CY2023Q4	us-gaap	Land Land	44060000	usd
CY2022Q4	us-gaap	Land Land	44060000	usd
CY2023Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	367827000	usd
CY2022Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	364063000	usd
CY2023Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	411887000	usd
CY2022Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	408123000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	180535000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	169530000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	231352000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	238593000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2160535000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2582222000	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	15737000	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	16009000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	17417000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	18061000	usd
CY2023Q4	us-gaap	Assets Assets	2425041000	usd
CY2022Q4	us-gaap	Assets Assets	2854885000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	27298000	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	25935000	usd
CY2023Q4	us-gaap	Advance Rent AdvanceRent	1990000	usd
CY2022Q4	us-gaap	Advance Rent AdvanceRent	2355000	usd
CY2023Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	5640000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	2863000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	34928000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	31153000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2022	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0650
CY2023	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0650
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	4915196	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	4915196	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	4915196	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	4915196	shares
CY2023Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	122880000	usd
CY2022Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	122880000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	119263000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	119263000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106847438	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106847438	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	109428252	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	109428252	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	1068000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	1094000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3935873000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3979566000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3926979000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3835815000	usd
CY2023Q4	eqc	Cumulative Common Stock Distributions CumulativeCommonStockDistributions	4864440000	usd
CY2022Q4	eqc	Cumulative Common Stock Distributions CumulativeCommonStockDistributions	4393522000	usd
CY2023Q4	eqc	Cumulative Preferred Stock Distributions CumulativePreferredStockDistributions	733676000	usd
CY2022Q4	eqc	Cumulative Preferred Stock Distributions CumulativePreferredStockDistributions	725688000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	2385067000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2816528000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	5046000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	7204000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2390113000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2823732000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2425041000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2854885000	usd
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	55336000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	58763000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	54927000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5188000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4377000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3075000	usd
CY2023	us-gaap	Revenues Revenues	60524000	usd
CY2022	us-gaap	Revenues Revenues	63140000	usd
CY2021	us-gaap	Revenues Revenues	58002000	usd
CY2023	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	27462000	usd
CY2022	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	24184000	usd
CY2021	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	25893000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17444000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17810000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17774000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	36974000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	30378000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	37444000	usd
CY2021	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	281000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	91164000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	37263000	usd
CY2023	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-24384000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3243164000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-16429000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	174407000	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	7081000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	15442000	usd
CY2021	eqc	Dividends And Other Distributions DividendsAndOtherDistributions	5419000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3055270000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	37357000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	155710000	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4160000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	11939000	usd
CY2022	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	1000	usd
CY2022	eqc	Dividends And Other Distributions DividendsAndOtherDistributions	120965000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2823732000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	91445000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	56803000	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3395000	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	15977000	usd
CY2023	eqc	Dividends And Other Distributions DividendsAndOtherDistributions	480843000	usd
CY2023	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	0	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2390113000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	91445000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	37357000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-16429000	usd
CY2023	us-gaap	Depreciation Depreciation	14914000	usd
CY2022	us-gaap	Depreciation Depreciation	15230000	usd
CY2021	us-gaap	Depreciation Depreciation	15235000	usd
CY2023	us-gaap	Straight Line Rent StraightLineRent	93000	usd
CY2022	us-gaap	Straight Line Rent StraightLineRent	-238000	usd
CY2021	us-gaap	Straight Line Rent StraightLineRent	1407000	usd
CY2023	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	2530000	usd
CY2022	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	2580000	usd
CY2021	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	2539000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	15977000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	11939000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	15442000	usd
CY2023	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2022	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	97000	usd
CY2021	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	usd
CY2023	eqc	Increase Decrease In Rents Receivable And Other Assets IncreaseDecreaseInRentsReceivableAndOtherAssets	1739000	usd
CY2022	eqc	Increase Decrease In Rents Receivable And Other Assets IncreaseDecreaseInRentsReceivableAndOtherAssets	6089000	usd
CY2021	eqc	Increase Decrease In Rents Receivable And Other Assets IncreaseDecreaseInRentsReceivableAndOtherAssets	-81000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-401000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	5513000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-410000	usd
CY2023	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	-365000	usd
CY2022	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	-1631000	usd
CY2021	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	1058000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	122268000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	65040000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	16109000	usd
CY2023	eqc	Cash Paid For Real Estate Improvements CashPaidForRealEstateImprovements	5691000	usd
CY2022	eqc	Cash Paid For Real Estate Improvements CashPaidForRealEstateImprovements	3577000	usd
CY2021	eqc	Cash Paid For Real Estate Improvements CashPaidForRealEstateImprovements	6803000	usd
CY2023	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	97000	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5691000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3480000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6803000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	60198000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	159870000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	181488000	usd
CY2023	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	usd
CY2022	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	1000	usd
CY2021	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	usd
CY2023	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	468232000	usd
CY2022	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	112199000	usd
CY2021	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	6024000	usd
CY2023	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	7988000	usd
CY2022	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	7988000	usd
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	7988000	usd
CY2023	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	1846000	usd
CY2022	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	280000	usd
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	33000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-538264000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-280336000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-195533000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-421687000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-218776000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-186227000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2582222000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2800998000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2987225000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2160535000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2582222000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2800998000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1946000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	456000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	246000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2881000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	934000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	509000	usd
CY2023Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	5640000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	2863000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	2365000	usd
CY2023	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	2572000	usd
CY2022	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	0	usd
CY2021	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	0	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2200000000	usd
CY2023Q4	eqc	Ownership Percentage Held In Subsidiary OwnershipPercentageHeldInSubsidiary	1
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	eqc	Operating Leases Committed Expenditures On Leases Executed In Period Area Of Leased Property OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty	200000	sqft
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:8pt;margin-top:8pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Reclassifications.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> Reclassifications have been made to the prior years' financial statements and notes to conform to the current year's presentation.</span></div>
CY2023	eqc	Deferred Tax Assets Minimum Percentage Of Probability Of Realization Of Largest Amount Of Tax Benefit DeferredTaxAssetsMinimumPercentageOfProbabilityOfRealizationOfLargestAmountOfTaxBenefit	0.50
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:8pt;margin-top:8pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Use of Estimates.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> Preparation of these financial statements in conformity with U.S. generally accepted accounting principles, or GAAP, requires us to make estimates and assumptions that may affect the amounts reported in these financial statements and related notes. The actual results could differ from these estimates.</span></div>
CY2021	us-gaap	Real Estate Improvements RealEstateImprovements	6300000	usd
CY2023	eqc	Operating Leases Committed Expenditures On Leases Executed In Period OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod	9600000	usd
CY2023Q4	eqc	Operating Leases Committed Expenditures On Leases Executed In Period Committed But Unspent Tenant Related Obligations OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations	13100000	usd
CY2023	eqc	Number Of Real Estate Properties Sold NumberOfRealEstatePropertiesSold	0	property
CY2022	eqc	Number Of Real Estate Properties Sold NumberOfRealEstatePropertiesSold	0	property
CY2021	eqc	Number Of Real Estate Properties Sold NumberOfRealEstatePropertiesSold	0	property
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	34544000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	32955000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	30033000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	25066000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	20031000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	46434000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	189063000	usd
CY2023	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	36008000	usd
CY2022	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	37846000	usd
CY2021	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	36461000	usd
CY2021	us-gaap	Variable Lease Income VariableLeaseIncome	18466000	usd
CY2021	us-gaap	Lease Income LeaseIncome	54927000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	21356000	usd
CY2022Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	22034000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	10540000	usd
CY2022Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	11320000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	10816000	usd
CY2022Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	10714000	usd
CY2023Q4	eqc	Capital Lease Incentives Gross Properties Heldand Usedin Operations CapitalLeaseIncentivesGrossPropertiesHeldandUsedinOperations	3471000	usd
CY2022Q4	eqc	Capital Lease Incentives Gross Properties Heldand Usedin Operations CapitalLeaseIncentivesGrossPropertiesHeldandUsedinOperations	3352000	usd
CY2023Q4	eqc	Accumulated Amortizationof Capital Lease Incentives Properties Heldand Usedin Operations AccumulatedAmortizationofCapitalLeaseIncentivesPropertiesHeldandUsedinOperations	2278000	usd
CY2022Q4	eqc	Accumulated Amortizationof Capital Lease Incentives Properties Heldand Usedin Operations AccumulatedAmortizationofCapitalLeaseIncentivesPropertiesHeldandUsedinOperations	1873000	usd
CY2023Q4	eqc	Capital Lease Incentives Net Properties Heldand Usedin Operations CapitalLeaseIncentivesNetPropertiesHeldandUsedinOperations	1193000	usd
CY2022Q4	eqc	Capital Lease Incentives Net Properties Heldand Usedin Operations CapitalLeaseIncentivesNetPropertiesHeldandUsedinOperations	1479000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense Year Two CapitalLeaseIncentivesFutureAmortizationExpenseYearTwo	222000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense Year Three DeferredChargesFutureAmortizationExpenseYearThree	1811000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense Year One DeferredChargesFutureAmortizationExpenseYearOne	2548000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense Year One CapitalLeaseIncentivesFutureAmortizationExpenseYearOne	283000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense Year Two DeferredChargesFutureAmortizationExpenseYearTwo	1833000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense Year Three CapitalLeaseIncentivesFutureAmortizationExpenseYearThree	216000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense Year Four DeferredChargesFutureAmortizationExpenseYearFour	1411000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense Year Four CapitalLeaseIncentivesFutureAmortizationExpenseYearFour	170000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense Year Five DeferredChargesFutureAmortizationExpenseYearFive	1098000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense Year Five CapitalLeaseIncentivesFutureAmortizationExpenseYearFive	107000	usd
CY2023Q4	eqc	Deferred Charges Future Amortization Expense After Year Five DeferredChargesFutureAmortizationExpenseAfterYearFive	2115000	usd
CY2023Q4	eqc	Capital Lease Incentives Future Amortization Expense After Year Five CapitalLeaseIncentivesFutureAmortizationExpenseAfterYearFive	195000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	10816000	usd
CY2023Q4	eqc	Capital Lease Incentives Net Properties Heldand Usedin Operations CapitalLeaseIncentivesNetPropertiesHeldandUsedinOperations	1193000	usd
CY2022Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.00
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	4.25
CY2020Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	4.25
CY2023Q1	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	468300000	usd
CY2022Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2022Q4	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	111000000	usd
CY2023Q1	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	1800000	usd
CY2022Q1	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	1500000	usd
CY2021Q1	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	6000000	usd
CY2023	eqc	Common Stock Dividends Ordinary Income Distribution Percentage CommonStockDividendsOrdinaryIncomeDistributionPercentage	0.6391
CY2022	eqc	Common Stock Dividends Ordinary Income Distribution Percentage CommonStockDividendsOrdinaryIncomeDistributionPercentage	0.9907
CY2021	eqc	Common Stock Dividends Ordinary Income Distribution Percentage CommonStockDividendsOrdinaryIncomeDistributionPercentage	0
CY2023	eqc	Common Stock Dividends Returnof Capital Distribution Percentage CommonStockDividendsReturnofCapitalDistributionPercentage	0.3609
CY2022	eqc	Common Stock Dividends Returnof Capital Distribution Percentage CommonStockDividendsReturnofCapitalDistributionPercentage	0.0093
CY2021	eqc	Common Stock Dividends Returnof Capital Distribution Percentage CommonStockDividendsReturnofCapitalDistributionPercentage	0
CY2023	eqc	Common Stock Dividends Capital Gain Distribution Percentage CommonStockDividendsCapitalGainDistributionPercentage	0
CY2022	eqc	Common Stock Dividends Capital Gain Distribution Percentage CommonStockDividendsCapitalGainDistributionPercentage	0
CY2021	eqc	Common Stock Dividends Capital Gain Distribution Percentage CommonStockDividendsCapitalGainDistributionPercentage	0
CY2023	eqc	Common Stock Dividends Depreciation Recapture Gain Percentage CommonStockDividendsDepreciationRecaptureGainPercentage	0
CY2022	eqc	Common Stock Dividends Depreciation Recapture Gain Percentage CommonStockDividendsDepreciationRecaptureGainPercentage	0
CY2021	eqc	Common Stock Dividends Depreciation Recapture Gain Percentage CommonStockDividendsDepreciationRecaptureGainPercentage	0
CY2023	eqc	Common Stock Dividends Distribution Percentage CommonStockDividendsDistributionPercentage	1.0000
CY2022	eqc	Common Stock Dividends Distribution Percentage CommonStockDividendsDistributionPercentage	1.0000
CY2021	eqc	Common Stock Dividends Distribution Percentage CommonStockDividendsDistributionPercentage	0
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	4915196	shares
CY2022	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0650
CY2023	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0650
CY2023	eqc	Preferred Stock Dividends Ordinary Income Distribution Percentage PreferredStockDividendsOrdinaryIncomeDistributionPercentage	1.0000
CY2022	eqc	Preferred Stock Dividends Ordinary Income Distribution Percentage PreferredStockDividendsOrdinaryIncomeDistributionPercentage	1.0000
CY2021	eqc	Preferred Stock Dividends Ordinary Income Distribution Percentage PreferredStockDividendsOrdinaryIncomeDistributionPercentage	0
CY2023	eqc	Preferred Stock Dividends Return Of Capital Distribution Percentage PreferredStockDividendsReturnOfCapitalDistributionPercentage	0
CY2022	eqc	Preferred Stock Dividends Return Of Capital Distribution Percentage PreferredStockDividendsReturnOfCapitalDistributionPercentage	0
CY2021	eqc	Preferred Stock Dividends Return Of Capital Distribution Percentage PreferredStockDividendsReturnOfCapitalDistributionPercentage	1.0000
CY2023	eqc	Preferred Stock Dividends Capital Gain Distribution Percentage PreferredStockDividendsCapitalGainDistributionPercentage	0
CY2022	eqc	Preferred Stock Dividends Capital Gain Distribution Percentage PreferredStockDividendsCapitalGainDistributionPercentage	0
CY2021	eqc	Preferred Stock Dividends Capital Gain Distribution Percentage PreferredStockDividendsCapitalGainDistributionPercentage	0
CY2023	eqc	Preferred Stock Dividends Depreciation Recapture Gain Percentage PreferredStockDividendsDepreciationRecaptureGainPercentage	0
CY2022	eqc	Preferred Stock Dividends Depreciation Recapture Gain Percentage PreferredStockDividendsDepreciationRecaptureGainPercentage	0
CY2021	eqc	Preferred Stock Dividends Depreciation Recapture Gain Percentage PreferredStockDividendsDepreciationRecaptureGainPercentage	0
CY2023	eqc	Preferred Stock Dividends Distribution Percentage PreferredStockDividendsDistributionPercentage	1.000
CY2022	eqc	Preferred Stock Dividends Distribution Percentage PreferredStockDividendsDistributionPercentage	1.000
CY2021	eqc	Preferred Stock Dividends Distribution Percentage PreferredStockDividendsDistributionPercentage	1.0000
CY2023	eqc	Common Stock Conversion Term CommonStockConversionTerm	P6M
CY2023	eqc	Common Stock Basis For Conversion CommonStockBasisForConversion	1
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	50000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	103000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	120000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1816000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	350000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1866000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	453000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	120000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	100000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	100000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.2100
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.2100
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.2100
CY2023	eqc	Effective Income Tax Rate Reconciliation Federal Taxon Builtin Gains EffectiveIncomeTaxRateReconciliationFederalTaxonBuiltinGains	0.0195
CY2022	eqc	Effective Income Tax Rate Reconciliation Federal Taxon Builtin Gains EffectiveIncomeTaxRateReconciliationFederalTaxonBuiltinGains	0.0093
CY2021	eqc	Effective Income Tax Rate Reconciliation Federal Taxon Builtin Gains EffectiveIncomeTaxRateReconciliationFederalTaxonBuiltinGains	0
CY2023	eqc	Effective Income Tax Rate Reconciliation State Localand Foreign Income Taxes EffectiveIncomeTaxRateReconciliationStateLocalandForeignIncomeTaxes	0.0005
CY2022	eqc	Effective Income Tax Rate Reconciliation State Localand Foreign Income Taxes EffectiveIncomeTaxRateReconciliationStateLocalandForeignIncomeTaxes	0.0027
CY2021	eqc	Effective Income Tax Rate Reconciliation State Localand Foreign Income Taxes EffectiveIncomeTaxRateReconciliationStateLocalandForeignIncomeTaxes	-0.0074
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.0200
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.0120
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.0074
CY2023Q4	eqc	Taxable Gain TaxableGain	200000000	usd
CY2022Q4	eqc	Taxable Gain TaxableGain	82000000	usd
CY2023Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	29000000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	29000000	usd
CY2023Q4	eqc	Tax Credit Carryforward Expiring In Year Fifteen TaxCreditCarryforwardExpiringInYearFifteen	18000000	usd
CY2023Q4	eqc	Tax Credit Carryforward No Expiration Date TaxCreditCarryforwardNoExpirationDate	11000000	usd
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	1650000	shares
CY2023Q2	eqc	Numberof Trustees In Boardof Trustees NumberofTrusteesInBoardofTrustees	6	trustee
CY2022Q2	eqc	Numberof Trustees In Boardof Trustees NumberofTrusteesInBoardofTrustees	6	trustee
CY2021Q2	eqc	Numberof Trustees In Boardof Trustees NumberofTrusteesInBoardofTrustees	6	trustee
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	5200000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	400000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	3500000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	2073350	shares
CY2022Q4	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	0	usd
CY2023Q4	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	0	usd
CY2023	us-gaap	Profit Loss ProfitLoss	91445000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	37357000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-16429000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	281000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	94000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-33000	usd
CY2023	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7988000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	83176000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29275000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-24384000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	91445000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	37357000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-16429000	usd
CY2023	eqc	Net Income Loss Attributable To Noncontrolling Interest Diluted NetIncomeLossAttributableToNoncontrollingInterestDiluted	281000	usd
CY2022	eqc	Net Income Loss Attributable To Noncontrolling Interest Diluted NetIncomeLossAttributableToNoncontrollingInterestDiluted	94000	usd
CY2021	eqc	Net Income Loss Attributable To Noncontrolling Interest Diluted NetIncomeLossAttributableToNoncontrollingInterestDiluted	-33000	usd
CY2023	us-gaap	Dilutive Securities DilutiveSecurities	-7988000	usd
CY2022	us-gaap	Dilutive Securities DilutiveSecurities	-7988000	usd
CY2021	us-gaap	Dilutive Securities DilutiveSecurities	-7988000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	83176000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	29275000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-24384000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	108841000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111674000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	121411000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110185000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112825000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	121411000	shares
CY2023	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.76
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.26
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.20
CY2023	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.75
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.26
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.20
CY2023	eqc	Weighted Average Number Of Shares Restricted Stock Units Unvested WeightedAverageNumberOfSharesRestrictedStockUnitsUnvested	127000	shares
CY2022	eqc	Weighted Average Number Of Shares Restricted Stock Units Unvested WeightedAverageNumberOfSharesRestrictedStockUnitsUnvested	105000	shares
CY2021	eqc	Weighted Average Number Of Shares Restricted Stock Units Unvested WeightedAverageNumberOfSharesRestrictedStockUnitsUnvested	256000	shares
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	44060000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	272927000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	112792000	usd
CY2023Q4	eqc	Sec Schedule Iii Real Estateand Accumulated Depreciation Carrying Amountof Impairment SECScheduleIIIRealEstateandAccumulatedDepreciationCarryingAmountofImpairment	17892000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	44060000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	367827000	usd
CY2023Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	411887000	usd
CY2023Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	180535000	usd
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	143319000	usd
CY2021	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	15054000	usd
CY2021	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	1934000	usd
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	156439000	usd
CY2022	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	15072000	usd
CY2022	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	1981000	usd
CY2022Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	169530000	usd
CY2023	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	14879000	usd
CY2023	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	3874000	usd
CY2023Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	180535000	usd
CY2023Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	545860000	usd

Files In Submission

Name	View Source	Status
0000803649-24-000025-index-headers.html	Edgar Link	pending
0000803649-24-000025-index.html	Edgar Link	pending
0000803649-24-000025.txt	Edgar Link	pending
0000803649-24-000025-xbrl.zip	Edgar Link	pending
eqc-20231231.htm	Edgar Link	pending
eqc-20231231.xsd	Edgar Link	pending
eqc-20231231_g1.jpg	Edgar Link	pending
eqc-20231231_cal.xml	Edgar Link	unprocessable
eqc-20231231_def.xml	Edgar Link	unprocessable
eqc-20231231_lab.xml	Edgar Link	unprocessable
eqc-20231231_pre.xml	Edgar Link	unprocessable
eqc-20231231_htm.xml	Edgar Link	completed
eqc123123exhibit1010.htm	Edgar Link	pending
eqc123123exhibit1017.htm	Edgar Link	pending
eqc123123exhibit107.htm	Edgar Link	pending
eqc123123exhibit108.htm	Edgar Link	pending
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eqc123123exhibit311.htm	Edgar Link	pending
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eqc123123exhibit321.htm	Edgar Link	pending
eqc123123exhibit43.htm	Edgar Link	pending
eqc123123exhibit971.htm	Edgar Link	pending
ewc123123exhibit1018.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable

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$EQC
Equity Commonwealth Stock $eqc

2024 Q1 Form 10-K Financial Statement

#000080364924000025 Filed on February 13, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQC Equity Commonwealth Stock $eqc

2024 Q1 Form 10-K Financial Statement

#000080364924000025 Filed on February 13, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQC
Equity Commonwealth Stock $eqc