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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Type (Details) - USD ($) | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | $ 1,919,258,000 |  | $ 1,895,848,000 |  |  |
Allowance for credit losses on loans | (21,699,000) | $ (20,172,000) | (20,035,000) | $ (20,382,000) | $ (20,023,000) | $ (19,208,000)
Loans, net | 1,897,559,000 |  | 1,875,813,000 |  |  |
Net of deferred loan origination fees | 3,963,000 |  | 4,136,000 |  |  |
Commercial | Commercial real estate - non-owner occupied |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | 757,961,000 |  | 739,565,000 |  |  |
Allowance for credit losses on loans | (13,093,000) | (12,060,000) | (11,964,000) | (12,177,000) | (12,533,000) | (12,010,000)
Commercial | Commercial real estate - owner occupied |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | 261,157,000 |  | 261,071,000 |  |  |
Allowance for credit losses on loans | (3,055,000) | (2,769,000) | (2,844,000) | (2,901,000) | (2,718,000) | (2,116,000)
Commercial | All other commercial loans |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | 430,499,000 |  | 423,277,000 |  |  |
Allowance for credit losses on loans | (3,891,000) | (3,594,000) | (3,361,000) | (3,678,000) | (3,580,000) | (2,918,000)
Residential mortgage loans |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | 398,496,000 |  | 408,009,000 |  |  |
Allowance for credit losses on loans | (1,314,000) | (1,281,000) | (1,356,000) | (1,112,000) | (769,000) | (1,764,000)
Consumer loans |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable | 71,145,000 |  | 63,926,000 |  |  |
Allowance for credit losses on loans | $ (346,000) | $ (468,000) | $ (510,000) | $ (514,000) | $ (423,000) | $ (400,000)

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