Shareholders' Equity - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified
|
1 Months Ended |
3 Months Ended |
12 Months Ended |
0 Months Ended |
12 Months Ended |
0 Months Ended |
Jan. 31, 2014
|
Dec. 31, 2014
|
Sep. 30, 2014
|
Jun. 30, 2014
|
Mar. 31, 2014
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2014
|
Jul. 25, 2014
|
Dec. 31, 2013
|
May 14, 2014
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Distributions on common stock declared (in dollars per share) |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.00us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.00us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.00us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
$ 0.25us-gaap_CommonStockDividendsPerShareDeclared |
|
|
|
|
Distributions paid or declared on common shares |
$ 29.6us-gaap_DividendsCommonStockCash |
|
|
|
|
|
|
|
|
|
|
|
|
Distribution percentage to shareholders consisting of an alternative minimum tax adjustment |
|
|
|
|
|
|
|
|
|
15.41%eqc_DividendsPercent |
|
|
|
Series D |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion of stock, common shares issued (in shares) |
|
|
|
|
|
|
|
|
|
10,412,499us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Conversion of stock, preferred shares outstanding (in shares) |
|
|
|
|
|
|
|
|
|
10,264,503us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Preferred shares outstanding (in shares) |
|
4,915,497us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
15,180,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
4,915,497us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
15,180,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
Preferred shares dividend (in dollars per share) |
|
|
|
|
|
|
|
|
|
1.625us-gaap_PreferredStockDividendRatePerDollarAmount / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Preferred shares, percent dividend yield |
|
|
|
|
|
|
|
|
|
6.50%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
6.50%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
Initial conversion rate |
|
0.480775eqc_ConvertiblePreferredStockConversionRatio / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
|
|
|
|
0.480775eqc_ConvertiblePreferredStockConversionRatio / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Initial conversion price per share (in dollars per share) |
|
$ 52.00eqc_ConvertiblePreferredStockConversionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
|
|
|
|
52.00eqc_ConvertiblePreferredStockConversionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Additional common shares (in shares) |
|
|
|
|
|
|
|
|
|
2,363,248eqc_ConvertiblePreferredStockSharesToBeIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Liquidation preference (in dollars per share) |
|
$ 25.00us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
|
|
|
|
25.00us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Percentage of average closing market price of the entity's common stock based on which ratio for conversion of preferred shares into common shares is determined |
|
|
|
|
|
|
|
|
|
98.00%eqc_ConvertiblePreferredStockConversionPricePercentageOfMarketPriceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Purchase price as a percentage of liquidation preference |
|
|
|
|
|
|
|
|
|
100.00%eqc_PreferredStockRedemptionPriceAsPercentageOfLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Number of consecutive trading days for calculating the average closing sale price of common shares |
|
|
|
|
|
|
|
|
|
5 days |
|
|
|
Outstanding convertible shares (in shares) |
|
4,915,497us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
|
|
|
|
4,915,497us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
|
Distributions on preferred stock declared (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.8125us-gaap_PreferredStockDividendsPerShareDeclared / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
Common Stock |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Fundamental change conversion rate, numerator (in shares) |
|
|
|
|
|
|
|
|
|
1.0145eqc_NumberOfSharesPerSpecifiedLiquidationPreferenceConsideredForCalculatingFundamentalChangeConversionRate / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
|
|
|
Outstanding convertible shares (in shares) |
|
2,363,248us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
|
|
|
|
|
|
|
2,363,248us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
|
|
|
Series E |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Preferred shares outstanding (in shares) |
|
11,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
11,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
11,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
11,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
Preferred shares dividend (in dollars per share) |
|
|
|
|
|
|
|
|
|
1.8125us-gaap_PreferredStockDividendRatePerDollarAmount / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
Preferred shares, percent dividend yield |
|
|
|
|
|
|
|
|
|
7.25%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
7.25%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
Liquidation preference (in dollars per share) |
|
$ 25.00us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
|
|
|
|
25.00us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
Redemption price (in dollars per share) |
|
$ 25.00us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
|
|
|
|
25.00us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
|
Distributions on preferred stock declared (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.90625us-gaap_PreferredStockDividendsPerShareDeclared / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
RMR |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Common shares issued (in shares) |
|
|
|
|
|
|
|
|
|
90,135us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = eqc_ReitManagementAndResearchLLCMember |
|
|
|
Fundamental Change Conversion Right | Series D |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion of stock, preferred shares outstanding (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
10,263,003us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = eqc_FundamentalChangeConversionRightMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
Distribution for the excess of the market value of common shares issued above carrying value of series D preferred shares redeemed |
|
|
|
|
|
|
|
|
|
|
|
|
$ 16.2eqc_PreferredStockDistributionAmountInExcessOfMarketValueOfCommonStockIssuedOverCarryingValueOfPreferredStockUponConversionOfPreferredStock / us-gaap_ConversionOfStockByUniqueDescriptionAxis = eqc_FundamentalChangeConversionRightMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
Fundamental Change Conversion Right | Common Stock |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion of stock, preferred shares outstanding (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
10,411,779us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = eqc_FundamentalChangeConversionRightMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
Period from February 15, 2014 to May 14, 2014 | Series D |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividends payable (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.40625us-gaap_DividendsPayableAmountPerShare / eqc_AccruedDividendPeriodAxis = eqc_AccruedDividendPeriodOneMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
Period from February 15, 2014 to May 14, 2014 | Series E |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividends payable (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.453125us-gaap_DividendsPayableAmountPerShare / eqc_AccruedDividendPeriodAxis = eqc_AccruedDividendPeriodOneMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|
Period from May 15, 2014 to August 14, 2014 | Series D |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividends payable (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.40625us-gaap_DividendsPayableAmountPerShare / eqc_AccruedDividendPeriodAxis = eqc_AccruedDividendPeriodTwoMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |
|
|
Period from May 15, 2014 to August 14, 2014 | Series E |
|
|
|
|
|
|
|
|
|
|
|
|
|
Shareholders' Equity |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dividends payable (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
$ 0.453125us-gaap_DividendsPayableAmountPerShare / eqc_AccruedDividendPeriodAxis = eqc_AccruedDividendPeriodTwoMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
|
|