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COMMITMENTS AND CONTINGENCIES: Significant off-balance sheet commitments (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Total | $ 178,822
Commitments to originate loans: | Adjustable-rate |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Total | 17,441
Commitments to originate loans: | Fixed-rate |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Total | 6,071
Standby letters of credit |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Total | 2,357
Undisbursed loan funds and unused lines of credit |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Total | $ 152,953

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