XML 67 R55.htm IDEA: XBRL DOCUMENT v3.24.3

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Amortized Cost Basis of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, modified, commitment to lend	$ 5,800		$ 5,800
Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	$ 0	0	$ 0
Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	34	108	421
Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	12,181	6,240	16,566	19,264
Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	297	0
Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	10
Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.04%	0.07%	0.08%	0.22%
Construction and commercial multifamily | Construction | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Construction and commercial multifamily | Construction | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Construction | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Construction | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Construction | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Construction | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Construction and commercial multifamily | Commercial multifamily | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Construction and commercial multifamily | Commercial multifamily | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Commercial multifamily | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Commercial multifamily | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Commercial multifamily | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Construction and commercial multifamily | Commercial multifamily | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Commercial real estate | Commercial real estate owner occupied | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Commercial real estate owner occupied | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	387
Commercial real estate | Commercial real estate owner occupied | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate owner occupied | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate owner occupied | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate owner occupied | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.06%
Commercial real estate | Commercial real estate non-owner occupied | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Commercial real estate non-owner occupied | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate non-owner occupied | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	648	11,733
Commercial real estate | Commercial real estate non-owner occupied | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate non-owner occupied | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Commercial real estate | Commercial real estate non-owner occupied | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.02%	0.85%
Commercial and industrial | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Commercial and industrial | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	34	108	34
Commercial and industrial | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	12,181	6,240	15,918	7,531
Commercial and industrial | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	297	0
Commercial and industrial | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	10
Commercial and industrial | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.88%	0.46%	1.15%	0.56%
Residential real estate | Residential real estate | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Residential real estate | Residential real estate | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Residential real estate | Residential real estate | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Residential real estate | Residential real estate | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Residential real estate | Residential real estate | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Residential real estate | Residential real estate | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Consumer loans | Home equity | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Consumer loans | Home equity | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Home equity | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Home equity | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Home equity | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Home equity | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Consumer loans | Consumer other | Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Consumer loans | Consumer other | Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Consumer other | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Consumer other | Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Consumer other | Combination Term Extension and Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	0	0	0	0
Consumer loans | Consumer other | Combination Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%

X

- Definition

Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage

+ References

No definition available.

+ Details

Name:	bhlb_FinancingReceivableExcludingAccruedInterestModifiedInPeriodToTotalFinancingReceivablesPercentage
Namespace Prefix:	bhlb_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481746/310-40-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 36
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-36

+ Details

Name:	us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PrincipalForgivenessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndPrincipalForgivenessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhlb_CommercialMultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhlb_RealEstateOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhlb_RealEstateNonOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=bhlb_CommercialAndIndustrialLoansPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: