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MBS And Other Investments: Narrative-Realized Gains (Losses) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 security | Sep. 30, 2014 security | Sep. 30, 2013 security | Sep. 30, 2012 security
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Loss on sale of securities | $ 465 | $ 671 | $ 873 |
Held-to-maturity securities, realized loss, number of securities | 15 | 18 | 25 |
Available-for-sale securities, realized loss, number of securities | 6 | 5 |  | 1
Available-for-sale Securities, Gross Realized Gains |  |  | 0 |
Available-for-sale Securities, Gross Realized Losses |  | 32 |  | 22
Security owned and pledged as collateral | $ 4,537 | $ 6,221 | $ 4,537 |

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=34720971&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 + Details
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