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Deposits: Schedule of Interest Expense on Deposits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Deposits [Abstract] |  |  |
NOW checking | $ 840 | $ 451 | $ 460
Savings | 106 | 85 | 78
Money market | 1,119 | 722 | 434
Certificates of deposit | 2,500 | 1,520 | 1,246
Total | $ 4,565 | $ 2,778 | $ 2,218

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- Definition Interest expense incurred on demand deposit accounts that represent borrowings rather than outstanding drafts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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- Definition Aggregate amount of interest expense on all deposits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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- Definition Interest expense incurred on all money market deposits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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- Definition The aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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