$EBC
Eastern Bankshares, Inc. Stock $ebc

$ebc Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000162828021022731 Filed on November 10, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue		$103.5M	$100.5M
YoY Change		2.94%	-10.83%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.600M	$3.300M	$3.700M
YoY Change	27.78%	-10.81%	-26.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$777.0K	$1.771M
YoY Change		-56.13%	-79.35%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$32.20M	$48.42M	$35.93M
YoY Change	-168.77%	34.74%	-20.27%
Income Tax	-$2.900M	$11.31M	$7.429M
% Of Pretax Income	-9.01%	23.36%	20.67%
Net Earnings	$35.10M	$37.11M	$28.51M
YoY Change	-179.66%	30.17%	-20.47%
Net Earnings / Revenue		35.86%	28.36%
Basic Earnings Per Share		$0.22	$0.00
Diluted Earnings Per Share	$203.5K	$0.22	$0.00
COMMON SHARES
Basic Shares Outstanding	186.8M shares	172.3M shares	0.000 shares
Diluted Shares Outstanding		172.3M shares	0.000 shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.232B	$1.252B	$2.328B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$80.98M	$44.05M	$50.54M
YoY Change	66.4%	-12.84%
Goodwill	$631.5M	$372.5M	$369.0M
YoY Change	70.92%	0.93%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$77.00M	$34.00M	$20.00M
YoY Change	492.31%	70.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$23.51B	$17.46B	$15.46B
YoY Change	47.28%	12.94%	34.36%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$89.00M	$79.00M	$89.00M
YoY Change	4.71%	-11.24%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$89.00M	$79.00M	$89.00M
YoY Change	4.71%	-11.24%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$354.0M	$273.0M	$297.0M
YoY Change	32.58%	-8.08%
Total Long-Term Liabilities	$354.0M	$273.0M	$297.0M
YoY Change	32.58%	-8.08%
TOTAL LIABILITIES
Total Short-Term Liabilities	$89.00M	$79.00M	$89.00M
Total Long-Term Liabilities	$354.0M	$273.0M	$297.0M
Total Liabilities	$20.11B	$14.03B	$13.75B
YoY Change	60.38%	2.07%	38.74%
SHAREHOLDERS EQUITY
Retained Earnings	$1.769B	$1.747B	$1.710B
YoY Change	6.19%	2.2%
Common Stock	$1.863M	$1.868M
YoY Change	-0.27%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.406B	$3.429B	$1.713B
YoY Change
Total Liabilities & Shareholders Equity	$23.51B	$17.46B	$15.46B
YoY Change	47.28%	12.94%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$35.10M	$37.11M	$28.51M
YoY Change	-179.66%	30.17%	-20.47%
Depreciation, Depletion And Amortization	$4.600M	$3.300M	$3.700M
YoY Change	27.78%	-10.81%	-26.0%
Cash From Operating Activities	$47.40M	$67.50M	$12.30M
YoY Change	-14.75%	448.78%	-79.47%
INVESTING ACTIVITIES
Capital Expenditures	-$1.900M	-$2.000M	-$1.300M
YoY Change	11.76%	53.85%	-7.14%
Acquisitions
YoY Change
Other Investing Activities	$403.8M	-$765.3M	-$598.7M
YoY Change	-152.33%	27.83%	-772.7%
Cash From Investing Activities	$401.9M	-$767.3M	-$599.9M
YoY Change	-151.97%	27.9%	-784.82%
FINANCING ACTIVITIES
Cash Dividend Paid	$13.70M	$13.80M
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-469.1M	387.2M	1.483B
YoY Change	-205.7%	-73.89%	-1832.71%
NET CHANGE
Cash From Operating Activities	47.40M	67.50M	12.30M
Cash From Investing Activities	401.9M	-767.3M	-599.9M
Cash From Financing Activities	-469.1M	387.2M	1.483B
Net Change In Cash	-19.80M	-312.6M	895.6M
YoY Change	-92.77%	-134.9%	1346.85%
FREE CASH FLOW
Cash From Operating Activities	$47.40M	$67.50M	$12.30M
Capital Expenditures	-$1.900M	-$2.000M	-$1.300M
Free Cash Flow	$49.30M	$69.50M	$13.60M
YoY Change	-13.96%	411.03%	-77.81%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	ebc	Income From Investments Held In Rabbi Trusts IncomeFromInvestmentsHeldInRabbiTrusts	4802000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Central Index Key EntityCentralIndexKey	0001810546
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201602Member
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-39610
	dei	Entity Registrant Name EntityRegistrantName	Eastern Bankshares, Inc.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	84-4199750
	dei	Entity Address Address Line1 EntityAddressAddressLine1	265 Franklin Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Boston
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	02110
	dei	City Area Code CityAreaCode	800
	dei	Local Phone Number LocalPhoneNumber	327-8376
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	EBC
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	No
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
	dei	Entity Ex Transition Period EntityExTransitionPeriod	false
	dei	Entity Shell Company EntityShellCompany	false
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	186758154	shares
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CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	116591000	USD
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CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	1937479000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	1251761000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	2054070000	USD
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CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3183861000	USD
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CY2021Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	9504562000	USD
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CY2021Q3	us-gaap	Trading Gains Losses TradingGainsLosses	0	USD
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	us-gaap	Trading Gains Losses TradingGainsLosses	0	USD
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	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1166000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	285000	USD
CY2021Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	4668000	USD
CY2020Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	5403000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	11276000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	13138000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	43209000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	47709000	USD
	us-gaap	Noninterest Income NoninterestIncome	144154000	USD
	us-gaap	Noninterest Income NoninterestIncome	128735000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	66238000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	66593000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	199554000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	191517000	USD
CY2021Q3	us-gaap	Occupancy Net OccupancyNet	7960000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	8294000	USD
	us-gaap	Occupancy Net OccupancyNet	24271000	USD
	us-gaap	Occupancy Net OccupancyNet	25598000	USD
CY2021Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	12191000	USD
CY2020Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	11721000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	37892000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	33905000	USD
CY2021Q3	us-gaap	Professional Fees ProfessionalFees	4024000	USD
CY2020Q3	us-gaap	Professional Fees ProfessionalFees	5510000	USD
	us-gaap	Professional Fees ProfessionalFees	14611000	USD
	us-gaap	Professional Fees ProfessionalFees	13595000	USD
CY2021Q3	ebc	Charitable Contributions CharitableContributions	0	USD
CY2020Q3	ebc	Charitable Contributions CharitableContributions	0	USD
	ebc	Charitable Contributions CharitableContributions	0	USD
	ebc	Charitable Contributions CharitableContributions	3984000	USD
CY2021Q3	us-gaap	Marketing Expense MarketingExpense	1598000	USD
CY2020Q3	us-gaap	Marketing Expense MarketingExpense	1943000	USD
	us-gaap	Marketing Expense MarketingExpense	6786000	USD
	us-gaap	Marketing Expense MarketingExpense	6056000	USD
CY2021Q3	us-gaap	Loan Processing Fee LoanProcessingFee	1586000	USD
CY2020Q3	us-gaap	Loan Processing Fee LoanProcessingFee	1554000	USD
	us-gaap	Loan Processing Fee LoanProcessingFee	5287000	USD
	us-gaap	Loan Processing Fee LoanProcessingFee	4702000	USD
CY2021Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1056000	USD
CY2020Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	938000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2989000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2788000	USD
CY2021Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	629000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	699000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1786000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2102000	USD
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3688000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12565000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7178000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	21507000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	98970000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	109817000	USD
	us-gaap	Noninterest Expense NoninterestExpense	300354000	USD
	us-gaap	Noninterest Expense NoninterestExpense	305754000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	48418000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	35934000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	156558000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	82724000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11312000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7429000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36980000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15924000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	37106000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	28505000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119578000	USD
	us-gaap	Net Income Loss NetIncomeLoss	66800000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	37106000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	28505000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119578000	USD
	us-gaap	Net Income Loss NetIncomeLoss	66800000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-21610000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-4321000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-71086000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	22158000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-5644000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-6144000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-17501000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	20286000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-426000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1702000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1278000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-5106000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-26828000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8763000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-87309000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	47550000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10278000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19742000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	32269000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	114350000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	1693630000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	28505000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8763000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1713372000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	3430622000	USD
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	13785000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	37106000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-26828000	USD
CY2021Q3	ebc	Employee Stock Ownership Plan Esop Value Committed To Be Released Shares EmployeeStockOwnershipPlanESOPValueCommittedToBeReleasedShares	2177000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	3429292000	USD
CY2021Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.08
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1600153000	USD
	us-gaap	Net Income Loss NetIncomeLoss	66800000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	47550000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1713372000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	3428052000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	37885000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119578000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-87309000	USD
	ebc	Employee Stock Ownership Plan Esop Value Committed To Be Released Shares EmployeeStockOwnershipPlanESOPValueCommittedToBeReleasedShares	6856000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	3429292000	USD
CY2021Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2021Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.08
CY2021Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.08
	us-gaap	Net Income Loss NetIncomeLoss	119578000	USD
	us-gaap	Net Income Loss NetIncomeLoss	66800000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-5368000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	37900000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9932000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12246000	USD
	ebc	Change In Unamortized Net Loan Costs And Premiums ChangeInUnamortizedNetLoanCostsAndPremiums	-19126000	USD
	ebc	Change In Unamortized Net Loan Costs And Premiums ChangeInUnamortizedNetLoanCostsAndPremiums	-5582000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5606000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7511000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	11084000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3057000	USD
	ebc	Right Of Use Asset Amortization RightOfUseAssetAmortization	9172000	USD
	ebc	Right Of Use Asset Amortization RightOfUseAssetAmortization	9086000	USD
	us-gaap	Increase Decrease In Insurance Settlements Receivable IncreaseDecreaseInInsuranceSettlementsReceivable	1598000	USD
	us-gaap	Increase Decrease In Insurance Settlements Receivable IncreaseDecreaseInInsuranceSettlementsReceivable	1685000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1166000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	285000	USD
	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	-24344000	USD
	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	-7409000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6856000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	0	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	755000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	672000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	0	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-961000	USD
	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	610000	USD
	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	4644000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-2515000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	26391000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-34227000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	122883000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-18904000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	61326000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	127099000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	14314000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	23237000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	9097000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	573135000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	289151000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	3202995000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	971990000	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	749000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	1796000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	527000	USD
	ebc	Contributions To Low Income Housing Tax Credit Investments ContributionsToLowIncomeHousingTaxCreditInvestments	-10168000	USD
	ebc	Contributions To Low Income Housing Tax Credit Investments ContributionsToLowIncomeHousingTaxCreditInvestments	-9614000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2294000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1631000	USD
	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	258000	USD
	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	54000	USD
	ebc	Proceeds From Payments For Outstanding Loans ProceedsFromPaymentsForOutstandingLoans	240354000	USD
	ebc	Proceeds From Payments For Outstanding Loans ProceedsFromPaymentsForOutstandingLoans	-929237000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4354000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	3791000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	3386000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	736000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	125000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	546000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2387553000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1616788000	USD
	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	1527724000	USD
	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	3830588000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-33544000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-49395000	USD
	ebc	Proceeds From Repayments Of Borrowed Funds ProceedsFromRepaymentsOfBorrowedFunds	2023000	USD
	ebc	Proceeds From Repayments Of Borrowed Funds ProceedsFromRepaymentsOfBorrowedFunds	-205958000	USD
	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	173000	USD
	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	165000	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	7114000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	37885000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	0	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1458145000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3567956000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-802309000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1965482000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2054070000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	362602000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1251761000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2328084000	USD
	us-gaap	Interest Paid Net InterestPaidNet	2943000	USD
	us-gaap	Interest Paid Net InterestPaidNet	12546000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	42432000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	35126000	USD
	ebc	Net Increase In Capital Commitments Relating To Low Income Housing Tax Credit Projects NetIncreaseInCapitalCommitmentsRelatingToLowIncomeHousingTaxCreditProjects	28291000	USD
	ebc	Net Increase In Capital Commitments Relating To Low Income Housing Tax Credit Projects NetIncreaseInCapitalCommitmentsRelatingToLowIncomeHousingTaxCreditProjects	25816000	USD
	ebc	Initial Recognition Of Operating Lease Rightofuse Assets Upon Adoption Of Accounting Standards Update InitialRecognitionOfOperatingLeaseRightofuseAssetsUponAdoptionOfAccountingStandardsUpdate	0	USD
	ebc	Initial Recognition Of Operating Lease Rightofuse Assets Upon Adoption Of Accounting Standards Update InitialRecognitionOfOperatingLeaseRightofuseAssetsUponAdoptionOfAccountingStandardsUpdate	92948000	USD
	ebc	Initial Recognition Of Operating Lease Liabilities Upon Adoption Of Accounting Standards Update InitialRecognitionOfOperatingLeaseLiabilitiesUponAdoptionOfAccountingStandardsUpdate	0	USD
	ebc	Initial Recognition Of Operating Lease Liabilities Upon Adoption Of Accounting Standards Update InitialRecognitionOfOperatingLeaseLiabilitiesUponAdoptionOfAccountingStandardsUpdate	96426000	USD
	us-gaap	Use Of Estimates UseOfEstimates	Use of EstimatesIn preparing the Consolidated Financial Statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheets and income and expenses for the periods reported. Actual results could differ from those estimates based on changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to change relate to the determination of the allowance for loan losses, valuation and fair value measurements, other-than-temporary impairment on investment securities, the liabilities for benefit obligations (particularly pensions), the provision for income taxes and impairment of goodwill and other intangibles.
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5721889000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	36802000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	69379000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5689312000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3125184000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	62549000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	3872000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3183861000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	20514000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	20531000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	412579000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	410479000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1977938000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1959075000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	3310858000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	3299227000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5721889000	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5689312000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	50429000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	50659000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	186659000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	190308000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	759068000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	763869000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	2129028000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	2179025000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3125184000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3183861000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	100000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1200000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	300000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	61	holding
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	60077000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	4453758000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9302000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	311428000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	69379000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	4765186000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	6	holding
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3872000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	416824000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	3872000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	416824000	USD
CY2021Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	9504562000	USD
CY2020Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	9730525000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	103398000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	113031000	USD
CY2021Q3	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-23104000	USD
CY2020Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-23536000	USD
CY2021Q3	us-gaap	Notes Receivable Net NotesReceivableNet	9378060000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	9593958000	USD
CY2021Q3	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	100000000	USD
CY2021Q3	us-gaap	Participating Mortgage Loans Mortgage Obligations Amount ParticipatingMortgageLoansMortgageObligationsAmount	12000000	USD
CY2020Q4	us-gaap	Participating Mortgage Loans Mortgage Obligations Amount ParticipatingMortgageLoansMortgageObligationsAmount	13500000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	105637000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1617000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	866000	USD
CY2021Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1488000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	103398000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	116636000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2418000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	514000	USD
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	700000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	115432000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	113031000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6262000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1997000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-5368000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	103398000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	82297000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6025000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1260000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	37900000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	115432000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	6874000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	293000	USD
	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	96231000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	103398000	USD
	ebc	Consumer Credit Exposures Period Past Due Required To Classify Loans As Special Mention Maximum ConsumerCreditExposuresPeriodPastDueRequiredToClassifyLoansAsSpecialMentionMaximum	P90D
	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice	68253000	USD
CY2021Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4426000	USD
CY2021Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	9431883000	USD
CY2021Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	9504562000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	8054000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	2432000	USD
CY2020	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	102545000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	113031000	USD
CY2020	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice	75609000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	9297000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	9645619000	USD
CY2020Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	9730525000	USD
	ebc	Consumer Credit Exposures Period Past Due Required To Classify Loans As Special Mention Maximum ConsumerCreditExposuresPeriodPastDueRequiredToClassifyLoansAsSpecialMentionMaximum	P90D
	ebc	Consumer Credit Exposures Period Past Due Required To Classify Loans As Special Mention Maximum ConsumerCreditExposuresPeriodPastDueRequiredToClassifyLoansAsSpecialMentionMaximum	P90D
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	40613000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	41005000	USD
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	9504562000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1458000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	9730525000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	2247000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	263	loan
CY2021Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	50826000	USD
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	301	loan
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	53204000	USD
CY2021Q3	ebc	Amount Of Specific Reserve Associated With Troubled Debt Restructuring AmountOfSpecificReserveAssociatedWithTroubledDebtRestructuring	3100000	USD
CY2020Q4	ebc	Amount Of Specific Reserve Associated With Troubled Debt Restructuring AmountOfSpecificReserveAssociatedWithTroubledDebtRestructuring	3500000	USD
CY2021Q3	ebc	Financing Receivables Commitments To Lend Additional Funds FinancingReceivablesCommitmentsToLendAdditionalFunds	500000	USD
CY2020Q4	ebc	Financing Receivables Commitments To Lend Additional Funds FinancingReceivablesCommitmentsToLendAdditionalFunds	0	USD
CY2021Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2	contract
CY2021Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	200000	USD
CY2021Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	200000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	contract
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	957000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	957000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3	contract
CY2020Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	35000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	35000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	25	contract
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	2796000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2800000	USD
CY2021Q3	ebc	Investment Recorded Represented By Troubled Debt Restructuring In The Current Period InvestmentRecordedRepresentedByTroubledDebtRestructuringInTheCurrentPeriod	1000000	USD
CY2020Q4	ebc	Investment Recorded Represented By Troubled Debt Restructuring In The Current Period InvestmentRecordedRepresentedByTroubledDebtRestructuringInTheCurrentPeriod	3900000	USD
CY2021Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	200000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	35000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	957000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2800000	USD
CY2021Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loan
CY2021Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loan
CY2020Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	40000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	loan
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	460000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loan
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	40000	USD
CY2021Q3	ebc	Amounts Charged Off On Td Rs AmountsChargedOffOnTDRs	0	USD
	ebc	Amounts Charged Off On Td Rs AmountsChargedOffOnTDRs	0	USD
CY2020Q3	ebc	Amounts Charged Off On Td Rs AmountsChargedOffOnTDRs	200000	USD
	ebc	Amounts Charged Off On Td Rs AmountsChargedOffOnTDRs	600000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	34426000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	38228000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	35717000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	42455000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	33827000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	38798000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	6874000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	39892000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	44675000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	8054000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	68253000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	77026000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	6874000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	75609000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	87130000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	8054000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	33874000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	235000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	34399000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	730000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	34915000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	156000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	38027000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	483000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	68789000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	391000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	72426000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1213000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	33859000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	274000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	38830000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	828000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	41280000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	182000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	38256000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	559000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	75139000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	456000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	77086000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1387000	USD
CY2021Q2	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	2981000	USD
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	2994000	USD
CY2020Q4	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	2495000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	3923000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	245000	USD
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	298000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	877000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1058000	USD
CY2021Q3	ebc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Other Cash Flow Changes CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOtherCashFlowChanges	-1161000	USD
CY2020Q3	ebc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Other Cash Flow Changes CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOtherCashFlowChanges	-44000	USD
	ebc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Other Cash Flow Changes CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOtherCashFlowChanges	-1370000	USD
	ebc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Other Cash Flow Changes CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOtherCashFlowChanges	-209000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	0	USD
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	0	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	1327000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	-4000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	1575000	USD
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	2652000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	1575000	USD
	ebc	Finance Lease Cost FinanceLeaseCost	116000	USD
CY2021Q3	us-gaap	Variable Lease Cost VariableLeaseCost	617000	USD
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	2652000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	75196000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	81596000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	79187000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	85330000	USD
CY2021Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	3478000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	10560000	USD
CY2021Q3	ebc	Finance Lease Cost FinanceLeaseCost	50000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	1564000	USD
CY2021Q3	us-gaap	Lease Cost LeaseCost	4145000	USD
	us-gaap	Lease Cost LeaseCost	12240000	USD
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	3596000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	10810000	USD
CY2020Q3	ebc	Finance Lease Cost FinanceLeaseCost	24000	USD
	ebc	Finance Lease Cost FinanceLeaseCost	43000	USD
CY2020Q3	us-gaap	Variable Lease Cost VariableLeaseCost	509000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	1479000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	4129000	USD
	us-gaap	Lease Cost LeaseCost	12332000	USD
CY2021Q3	ebc	Payment Of Lease Payments PaymentOfLeasePayments	3500000	USD
	ebc	Payment Of Lease Payments PaymentOfLeasePayments	10600000	USD
CY2020Q3	ebc	Payment Of Lease Payments PaymentOfLeasePayments	3600000	USD
	ebc	Payment Of Lease Payments PaymentOfLeasePayments	10600000	USD
CY2021Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y11M15D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y6M
CY2021Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0262
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0265
CY2021Q3	us-gaap	Goodwill Goodwill	372472000	USD
CY2021Q3	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	7300000	USD
CY2021Q3	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	379772000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	369477000	USD
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	7057000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	376534000	USD
	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	reporting_unit
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	37106000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	119578000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	186758154	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	186758154	shares
CY2021Q3	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	14459539	shares
	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	14583685	shares
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172298615	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172174469	shares
CY2021Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172298615	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172174469	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
	ebc	Affordable Housing Investment Tax Credits AffordableHousingInvestmentTaxCredits	85500000	USD
CY2020	ebc	Affordable Housing Investment Tax Credits AffordableHousingInvestmentTaxCredits	59800000	USD
CY2021Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	82533000	USD
CY2020Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	58504000	USD
CY2021Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	49611000	USD
CY2020Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	31487000	USD
CY2021Q3	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1730000	USD
CY2020Q3	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1539000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	4717000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	4597000	USD
CY2021Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1496000	USD
CY2020Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1263000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	4255000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	3715000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	6231000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	23690000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	7896000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	18694000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1269000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	2617000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	3805000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	7849000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	8141000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	7427000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	24424000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	22277000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-2945000	USD
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	19000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	7000	USD
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-8835000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-3537000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-2361000	USD
	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-10612000	USD
	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-7082000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	1616000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	3789000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	4848000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	11367000	USD
CY2021Q2	us-gaap	Loss Contingency New Claims Filed Number LossContingencyNewClaimsFiledNumber	2	settlement
CY2021Q3	us-gaap	Loss Contingency Estimate Of Possible Loss LossContingencyEstimateOfPossibleLoss	3300000	USD
CY2021Q3	ebc	Other Comprehensive Income Loss Cash Flow Hedge Unrealized Gains For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeUnrealizedGainsForDiscontinuanceBeforeTax	0	USD
CY2020Q3	ebc	Other Comprehensive Income Loss Cash Flow Hedge Unrealized Gains For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeUnrealizedGainsForDiscontinuanceBeforeTax	26410000	USD
	ebc	Other Comprehensive Income Loss Cash Flow Hedge Unrealized Gains For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeUnrealizedGainsForDiscontinuanceBeforeTax	0	USD
	ebc	Other Comprehensive Income Loss Cash Flow Hedge Unrealized Gains For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeUnrealizedGainsForDiscontinuanceBeforeTax	57362000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	7851000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	7036000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	24344000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	7409000	USD
CY2021Q3	us-gaap	Fair Value Liabilities Level2 To Level1 Transfers Amount FairValueLiabilitiesLevel2ToLevel1TransfersAmount	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-142000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	46869000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	0	USD
CY2021Q3	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	908000	USD
CY2020Q3	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	978000	USD
	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	5037000	USD
	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-6271000	USD
CY2021Q3	ebc	Credit Exposure To Interest Swap In Excess Of Termination Values CreditExposureToInterestSwapInExcessOfTerminationValues	0	USD
CY2020Q4	ebc	Credit Exposure To Interest Swap In Excess Of Termination Values CreditExposureToInterestSwapInExcessOfTerminationValues	100000	USD
CY2021Q3	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	USD
CY2021Q3	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2020Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	USD
CY2020Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2020Q4	us-gaap	Fair Value Liabilities Level1 To Level2 Transfers Amount FairValueLiabilitiesLevel1ToLevel2TransfersAmount	0	USD
CY2020Q4	us-gaap	Fair Value Liabilities Level2 To Level1 Transfers Amount FairValueLiabilitiesLevel2ToLevel1TransfersAmount	0	USD
CY2021Q3	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2021Q3	us-gaap	Fair Value Liabilities Level1 To Level2 Transfers Amount FairValueLiabilitiesLevel1ToLevel2TransfersAmount	0	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	47709000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39549000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	36657000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	124006000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	115926000	USD
CY2021Q3	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	3660000	USD
CY2020Q3	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	11052000	USD
	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	20148000	USD
	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	12809000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	43209000	USD
	us-gaap	Noninterest Income NoninterestIncome	144154000	USD
	us-gaap	Noninterest Income NoninterestIncome	128735000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-35001000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-8173000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-26828000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-113821000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-26512000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-87309000	USD
CY2021Q3	us-gaap	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge	41200000	USD
CY2021Q3	ebc	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge After Amortization DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedgeAfterAmortization	12300000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-11742000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-2979000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8763000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	63784000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	16234000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	47550000	USD
CY2020Q3	us-gaap	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge	41200000	USD
CY2020Q3	ebc	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge After Amortization DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedgeAfterAmortization	35900000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-70177000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	17132000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-87309000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	56074000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	8524000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	47550000	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	102691000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	98742000	USD
CY2021Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1488000	USD
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	700000	USD
CY2021Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	104179000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	98042000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	43209000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	47709000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	98970000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	109817000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	48418000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	35934000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11312000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7429000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	37106000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	28505000	USD
CY2021Q3	us-gaap	Assets Assets	17461223000	USD
CY2020Q3	us-gaap	Assets Assets	15460594000	USD
CY2021Q3	us-gaap	Liabilities Liabilities	14031931000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	13747222000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	307390000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	297643000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-5368000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	37900000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	312758000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	259743000	USD
	us-gaap	Noninterest Income NoninterestIncome	144154000	USD
	us-gaap	Noninterest Income NoninterestIncome	128735000	USD
	us-gaap	Noninterest Expense NoninterestExpense	300354000	USD
	us-gaap	Noninterest Expense NoninterestExpense	305754000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	156558000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	82724000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36980000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15924000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119578000	USD
	us-gaap	Net Income Loss NetIncomeLoss	66800000	USD

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$EBC
Eastern Bankshares, Inc. Stock $ebc

2021 Q4 Form 10-Q Financial Statement

#000162828021022731 Filed on November 10, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EBC Eastern Bankshares, Inc. Stock $ebc

2021 Q4 Form 10-Q Financial Statement

#000162828021022731 Filed on November 10, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EBC
Eastern Bankshares, Inc. Stock $ebc