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Servicing Rights - Analysis of the changes in MSRs (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Freddie Mac
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of year	$ 2,022	$ 1,823	$ 1,570
Additions	747	687	739
Amortization	(563)	(488)	(486)
Balance, end of year	2,206	2,022	1,823
SBA
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of year	6	2	3
Additions due to South Sound Acquisition	281	0	0
Other additions	2	7	0
Amortization	(83)	(3)	(1)
Valuation allowance	(4)	0	0
Balance, end of year	$ 202	$ 6	$ 2

X

- Definition

Mortgage Servicing Rights (MSR), Additions

+ References

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- Definition

Mortgage Servicing Rights (MSR), Additions, Business Acquisition

+ References

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- Definition

Mortgage Servicing Rights (MSR), Additions, Excluding Business Acquisitions

+ References

No definition available.

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- References

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- References

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- Definition

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 4
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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