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Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3) |  |
Beginning Balance | $ 24 | $ 773
Transfers into Level 3 |  | 31
Transfers out of Level 3 | (24) | (763)
Total realized and unrealized gains (losses): |  |
Included in other comprehensive income (loss) |  | 13
Purchases |  | 620
Issuances |  |
Sales |  | (650)
Settlements |  |
Ending Balance |  | 24
Mortgage-backed securities [Member] |  |
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3) |  |
Beginning Balance | 15 | 69
Transfers into Level 3 |  | 17
Transfers out of Level 3 | (15) | (68)
Total realized and unrealized gains (losses): |  |
Included in other comprehensive income (loss) |  | (3)
Purchases |  | 620
Issuances |  |
Sales |  | (620)
Settlements |  |
Ending Balance |  | 15
Asset-backed securities [Member] |  |
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3) |  |
Beginning Balance | 9 |
Transfers into Level 3 |  | 14
Transfers out of Level 3 | (9) |
Total realized and unrealized gains (losses): |  |
Included in other comprehensive income (loss) |  | (3)
Purchases |  |
Issuances |  |
Sales |  | (2)
Settlements |  |
Ending Balance |  | 9
U.S. Government Obligations [Member] |  |
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3) |  |
Beginning Balance |  | 704
Transfers out of Level 3 |  | (695)
Total realized and unrealized gains (losses): |  |
Included in other comprehensive income (loss) |  | 19
Issuances |  |
Sales |  | (28)
Settlements |  |
Ending Balance |  |

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- Definition Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Issues that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Transfers into assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Transfers out of assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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