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COMMITMENTS AND CONTINGENCIES: Significant off-balance sheet commitments (Details) $ in Thousands | Jun. 30, 2018 USD ($)
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Contract or Notional Amount | $ 208,959
Commitments to originate loans: | Adjustable-rate |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Contract or Notional Amount | 29,287
Commitments to originate loans: | Fixed-rate |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Contract or Notional Amount | 25,456
Standby letters of credit |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Contract or Notional Amount | 2,432
Undisbursed loan funds and unused lines of credit |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
Contract or Notional Amount | $ 151,784

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