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Fair Value Measurements: Fair Value Measurements, Nonrecurring, Valuation Techniques (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017
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Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, estimated fair value, nonrecurring | $ 5,765 | $ 5,987
Impaired loans |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, estimated fair value, nonrecurring | 2,878 | 2,686
Nonrecurring | Impaired loans | Market Approach Valuation Technique |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, estimated fair value, nonrecurring | 2,878 | 2,686
Nonrecurring | OREO and other repossessed assets | Market Approach Valuation Technique |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, estimated fair value, nonrecurring | $ 2,887 | $ 3,301

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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