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Investment Securities: Schedule of Other than Temporary Impairments (Details) - USD ($)
$ in Thousands

12 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2016

Held to Maturity

Held To Maturity - total (OTTI) recoveries

$ 73

$ 38

$ (29)

Net recoveries (OTTI) on investment securities

68

33

(168)

Held-to-maturity Securities

Held to Maturity

Held To Maturity - total (OTTI) recoveries

73

38

(29)

Held To Maturity - adjustment for portion of OTTI recorded as (transferred from) other comprehensive income (before income taxes)

^[1]

(5)

(5)

(139)

Net recoveries (OTTI) on investment securities

^[2]

$ 68

$ 33

$ (168)

[1]	Represents OTTI related to all other factors.
[2]	Represents OTTI related to credit losses.

X

- Definition

Marketable Securities, Realized Losses (Recoveries), Other than Temporary Impairments, Amount

+ References

No definition available.

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- Definition

Other than Temporary Impairment Losses (Recoveries), Investments, Portion Recognized in Earnings, Net

+ References

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- Definition

Amount before tax of other than temporary impairment (OTTI) on investment in held-to-maturity debt security, recognized in other comprehensive loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=82896770&loc=SL6284422-111562

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580

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