XML 43 R31.htm IDEA: XBRL DOCUMENT
v3.19.2

DEPOSITS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Deposits [Abstract] |
Summary of Time Deposits | A summary of time deposits is as follows:
(In thousands) |  | June 30, 2019 |  | December 31, 2018
Time less than $100,000 |  | $ | 888,791 |  |  | $ | 719,689 |
Time $100,000 through $250,000 |  | 2,221,209 |  |  | 2,060,500 |
Time more than $250,000 |  | 971,398 |  |  | 507,528 |
Total time deposits |  | $ | 4,081,398 |  |  | $ | 3,287,717 |

X
- Definition Tabular disclosure of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. + References No definition available. + Details
Name: | bhlb_ScheduleOfTimeDepositsTableTextBlock
Namespace Prefix: | bhlb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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