Fair Value (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Assets:
Available-for-sale Securities	$ 545,484	$ 547,864
Derivative	592	44
REMIC's
Assets:
Available-for-sale Securities	538,903	541,042
Fannie Mae Certificates
Assets:
Available-for-sale Securities	6,581	6,822
Quoted Prices In Active Markets For Identical Assets (Level 1)
Assets:
Available-for-sale Securities	0	0
Derivative	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale Securities	545,484	547,864
Derivative	0	0
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale Securities	0	0
Derivative	592	44
Fair Value, Measurements, Recurring
Assets:
Total	546,076	547,908
Liabilities:
Total	0	0
Fair Value, Measurements, Recurring \| Interest Rate Lock Commitments
Assets:
Derivative	592	44
Fair Value, Measurements, Recurring \| REMIC's
Assets:
Available-for-sale Securities	538,903	541,042
Fair Value, Measurements, Recurring \| Fannie Mae Certificates
Assets:
Available-for-sale Securities	6,581	6,822
Fair Value, Measurements, Recurring \| Quoted Prices In Active Markets For Identical Assets (Level 1)
Assets:
Total	0	0
Fair Value, Measurements, Recurring \| Quoted Prices In Active Markets For Identical Assets (Level 1) \| Interest Rate Lock Commitments
Assets:
Derivative	0	0
Fair Value, Measurements, Recurring \| Quoted Prices In Active Markets For Identical Assets (Level 1) \| REMIC's
Assets:
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring \| Quoted Prices In Active Markets For Identical Assets (Level 1) \| Fannie Mae Certificates
Assets:
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Assets:
Total	545,484	547,864
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Interest Rate Lock Commitments
Assets:
Derivative	0	0
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| REMIC's
Assets:
Available-for-sale Securities	538,903	541,042
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Fannie Mae Certificates
Assets:
Available-for-sale Securities	6,581	6,822
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3)
Assets:
Total	592	44
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3) \| Interest Rate Lock Commitments
Assets:
Derivative	592	44
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3) \| REMIC's
Assets:
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3) \| Fannie Mae Certificates
Assets:
Available-for-sale Securities	$ 0	$ 0

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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-Publisher FASB
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Fair value of financial and nonfinancial obligations.

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