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SUBSEQUENT EVENTS (Details) $ in Thousands | Jul. 08, 2019 USD ($) Branch | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |
Deposits |  | $ 2,481,376 |  | $ 2,483,238
Loans |  | $ 2,578,238 |  | $ 2,490,227
People's United Bank, National Association |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Deposits |  |  | $ 287,000 |
Loans |  |  | 111,000 |
Assets |  |  | $ 284,000 |
People's United Bank, National Association | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of branches to be acquired | Branch | 8 |  |  |
Expected premium on deposits | 6.30% |  |  |
Expected premium on annualized wealth management revenue | 1.2 |  |  |
Approximate value of premises | $ 4,400 |  |  |
Bar Harbor Bankshares | People's United Bank, National Association | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of branches expected to be acquired | Branch | 56 |  |  |
MAINE | Bar Harbor Bankshares | People's United Bank, National Association | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of branches expected to be acquired | Branch | 22 |  |  |

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