XML 111 R81.htm IDEA: XBRL DOCUMENT
v3.6.0.2

LOANS - Modifications by Class (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) modification | Dec. 31, 2015 USD ($) modification | Dec. 31, 2014 USD ($) modification
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 17 | 14 | 17
Pre-Modification Outstanding Recorded Investment | $ 17,765 | $ 19,047 | $ 10,515
Post-Modification Outstanding Recorded Investment | $ 17,765 | $ 17,607 | $ 10,513
Commercial loans | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification |  | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 123 |
Post-Modification Outstanding Recorded Investment |  | $ 123 |
Commercial loans | Single and multi-family |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 5 | 2 | 1
Pre-Modification Outstanding Recorded Investment | $ 437 | $ 307 | $ 623
Post-Modification Outstanding Recorded Investment | $ 437 | $ 307 | $ 623
Commercial loans | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 5 | 4 | 10
Pre-Modification Outstanding Recorded Investment | $ 16,651 | $ 8,577 | $ 9,190
Post-Modification Outstanding Recorded Investment | $ 16,651 | $ 7,274 | $ 9,190
Commercial and industrial | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 4 | 6 |
Pre-Modification Outstanding Recorded Investment | $ 555 | $ 9,041 |
Post-Modification Outstanding Recorded Investment | $ 555 | $ 8,904 |
Residential | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification |  |  | 1
Pre-Modification Outstanding Recorded Investment |  |  | $ 102
Post-Modification Outstanding Recorded Investment |  |  | $ 102
Residential | 1-4 family |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 2 |  | 5
Pre-Modification Outstanding Recorded Investment | $ 5 |  | $ 600
Post-Modification Outstanding Recorded Investment | $ 5 |  | $ 598
Consumer | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification |  | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 999 |
Post-Modification Outstanding Recorded Investment |  | $ 999 |
Consumer | Home equity |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of modifications (modification) | modification | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 117 |  |
Post-Modification Outstanding Recorded Investment | $ 117 |  |

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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_SingleAndMultiFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhlb_OtherReceivableMember
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=bhlb_A1to4FamilyMember
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: |