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FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK: (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Loss Contingencies [Line Items] |  |  |  |
Other Commitments |  |  | $ 120,111,000 | $ 119,108,000
TOTAL |  |  | 823,422,000 | 716,382,000
Minimum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 0.0325 | $ 0.0325 |  |
Maximum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 0.0600 | $ 0.0600 |  |
Home Equity |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
TOTAL |  |  | 92,346,000 | 88,672,000
Commercial Operating Lines |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
TOTAL |  |  | 610,965,000 | 508,602,000
Commercial letters of credit |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
TOTAL |  |  | $ 7,042,000 | $ 3,601,000

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