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Fair Value Measurements: Level 3 Fair Value Measurements, Nonrecurring (Details) - Nonrecurring - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, estimated fair value, nonrecurring	$ 5,987	$ 9,636
Total impaired loans
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, estimated fair value, nonrecurring	2,686	5,519
OREO and other repossessed assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, estimated fair value, nonrecurring	3,301	4,117
Market approach | Total impaired loans
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, estimated fair value, nonrecurring	2,686	5,519
Market approach | OREO and other repossessed assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, estimated fair value, nonrecurring	$ 3,301	$ 4,117

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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.

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- Definition

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