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ACQUISITIONS - Estimated fair value of assets acquired and liabilities (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
May 13, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 01, 2023
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Other intangibles |  |  | $ 2,900 |  |
Goodwill |  | $ 845,396 | 841,841 | $ 799,109 |
Axiom |  |  |  |  |
Consideration : |  |  |  |  |
Cash |  | 1,819 |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |
Investment securities |  | 0 |  |  |
Loans, net of allowance for credit losses on PCD loans |  | 0 |  |  |
Premises and equipment, net |  | 25 |  |  |
Accrued interest and fees receivable |  | 0 |  |  |
Other assets |  | 2 |  |  |
Deposits |  | 0 |  |  |
Other intangibles |  |  |  |  | $ 1,200
Other liabilities |  | (9) |  |  |
Other Federal Home Loan Bank borrowings |  | 0 |  |  |
Total identifiable assets, net |  | 1,194 |  |  |
Contingent consideration |  | 0 |  |  |
Total net consideration |  | 1,819 |  |  |
Goodwill |  | 625 |  |  | $ 600
Axiom | Core deposit intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Deposits |  | 0 |  |  |
Axiom | Other intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Other intangibles |  | 1,176 |  |  |
Elmira acquisition |  |  |  |  |
Consideration : |  |  |  |  |
Cash |  |  | 82,179 |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Cash and cash equivalents |  |  | 84,988 |  |
Investment securities | $ 11,300 |  | 11,305 |  |
Loans, net of allowance for credit losses on PCD loans | 436,800 |  | 436,796 |  |
Premises and equipment, net |  |  | 11,303 |  |
Accrued interest and fees receivable |  |  | (882) |  |
Other assets |  |  | 30,337 |  |
Deposits | (522,300) |  | (522,295) |  |
Other liabilities |  |  | (3,596) |  |
Other Federal Home Loan Bank borrowings |  |  | (17,616) |  |
Total identifiable assets, net |  |  | 40,074 |  |
Contingent consideration |  |  | 0 |  |
Total net consideration | 82,200 |  | 82,179 |  |
Goodwill | 42,100 |  | 42,105 |  |
Elmira acquisition | Core deposit intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Deposits | $ (8,000) |  | 7,970 |  |
Elmira acquisition | Other intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Other intangibles |  |  | 0 |  |
Other |  |  |  |  |
Consideration : |  |  |  |  |
Cash |  | 6,698 | 3,477 |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Investment securities |  | 0 | 0 |  |
Loans, net of allowance for credit losses on PCD loans |  | 0 | 0 |  |
Premises and equipment, net |  | 41 | 14 |  |
Accrued interest and fees receivable |  | 0 | 0 |  |
Other assets |  | 175 | 0 |  |
Deposits |  | 0 | 0 |  |
Other liabilities |  | (9) | (34) |  |
Other Federal Home Loan Bank borrowings |  | 0 | 0 |  |
Total identifiable assets, net |  | 5,137 | 2,994 |  |
Contingent consideration |  | 1,450 | 0 |  |
Total net consideration |  | 8,148 | 3,477 |  |
Goodwill |  | 3,011 | 483 |  |
Other | Core deposit intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Deposits |  | 0 | 0 |  |
Other | Other intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Other intangibles |  | 4,930 | 3,014 |  |
Total |  |  |  |  |
Consideration : |  |  |  |  |
Cash |  | 8,517 | 85,656 | 29,870 |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Cash and cash equivalents |  | 0 | 84,988 | 541 |
Investment securities |  | 0 | 11,305 | 0 |
Loans, net of allowance for credit losses on PCD loans |  | 0 | 436,796 | 0 |
Premises and equipment, net |  | 66 | 11,317 | 760 |
Accrued interest and fees receivable |  | 0 | (882) | 0 |
Other assets |  | 177 | 30,337 | 579 |
Deposits |  | 0 | (522,295) | 0 |
Other liabilities |  | (18) | (3,630) | (1,164) |
Other Federal Home Loan Bank borrowings |  | 0 | (17,616) | 0 |
Total identifiable assets, net |  | 6,331 | 43,068 | 27,053 |
Contingent consideration |  | 1,450 | 0 | 2,900 |
Total net consideration |  | 9,967 | 85,656 | 32,770 |
Goodwill |  | 3,636 | 42,588 | 5,717 |
Total | Core deposit intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Deposits |  | 0 | 7,970 | 0 |
Total | Other intangibles |  |  |  |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |
Other intangibles |  | $ 6,106 | $ 3,014 | $ 26,337 |

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