XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.23.2

DEPOSITS (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Deposits [Abstract] |  |
Time less than $100,000 | $ 669,592 | $ 549,265
Time $100,000 through $250,000 | 1,102,571 | 642,600
Time more than $250,000 | 663,455 | 441,842
Total time deposits | $ 2,435,618 | $ 1,633,707

X
- Definition Time Deposits, $100,000 Through $250,000 + References No definition available. + Details
Name: | bhlb_TimeDeposits100000Through250000
Namespace Prefix: | bhlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Time Deposits, $250,000 or More + References No definition available. + Details
Name: | bhlb_TimeDeposits250000orMore
Namespace Prefix: | bhlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of time deposit liabilities, including certificates of deposit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481047/942-405-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_TimeDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of less than $100,000. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Industry Guide -Number 3 -Section V -Paragraph D-E -Publisher SEC + Details
Name: | us-gaap_TimeDepositsLessThan100000
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant