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v3.22.1

BORROWINGS (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 USD ($) | Mar. 31, 2022 USD ($) agreement | Dec. 31, 2021 USD ($) agreement | Dec. 31, 2007 USD ($) security
Debt Instrument [Line Items] |  |  |  |
Federal home loan balance |  | $ 150,000,000 |  |
Prepayments of the FHLB borrowings |  | 1,400,000,000 | $ 1,300,000,000 |
Remaining borrowing capacity |  | 990,300,000 | 932,700,000 |
Advances from the FHLB |  | 0 | 0 |
Naming applicable municipalities as beneficiaries |  | 10,400,000 | 10,400,000 |
Unamortized debt issuance costs |  | $ 1,300,000 | $ 1,300,000 |
Subordinated Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of preferred trust securities | security |  |  |  | 2
Floating rate trust preferred securities |  |  |  | $ 10,000,000
Effective percentage |  | 2.38% | 1.75% |
Trust preferred securities, interest payment deferment period |  | 5 years |  |
Subordinated Debt | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, basis spread on variable rate |  | 1.55% |  |
Notes Maturing In June 2031 | Subordinated Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Floating rate trust preferred securities | $ 85,000,000 |  |  |
Interest rate, percentage | 3.25% |  |  |
Proceeds from issuance of subordinated notes, net of issuance costs | $ 83,500,000 |  |  |
Notes Maturing In June 2031 | Subordinated Debt | SOFR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, basis spread on variable rate |  | 2.58% |  |
Line of Credit | Unsecured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of unsecured lines of credit issued | agreement |  | 1 | 1 |
Pledge on certain loan amount |  | $ 10,000,000 | $ 10,000,000 |
Line of credit, outstanding amount |  | $ 0 | 0 |
Line of Credit | Unsecured Debt | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, basis spread on variable rate |  | 2.75% |  |
Line of Credit | Overnight Borrowing Agreements |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, outstanding amount |  | $ 0 | $ 0 |

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