XML 40 R90.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

LOAN LOSS ALLOWANCE- Summary of Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 9,502,428	$ 9,043,253
Non-Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	39,640	32,425
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	122,424	109,490
Total Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	162,064	141,915
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	75,284	47,166
Total Criticized
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	237,348	189,081
Business Activities Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,166,497	7,366,744
Business Activities Loans | Non-Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	32,536	26,478
Business Activities Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	49,293	60,698
Business Activities Loans | Total Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	81,829	87,176
Business Activities Loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	63,943	26,333
Business Activities Loans | Total Criticized
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	145,772	113,509
Acquired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,335,931	1,676,509
Acquired Loans | Non-Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,104	5,947
Acquired Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	73,131	48,792
Acquired Loans | Total Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	80,235	54,739
Acquired Loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,341	20,833
Acquired Loans | Total Criticized
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 91,576	$ 75,572

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

No definition available.

+ Details

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

X

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524

+ Details

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

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=bhlb_NonAccrualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=bhlb_ClassifiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_CriticizedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=bhlb_LoansFromBusinessActivitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=bhlb_LoansAcquiredFromBusinessCombinationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: