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Loan Receivable and Allowance for Loan and Lease Losses Non performing TDRs (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
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Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2013 | Jun. 30, 2013 | Sep. 30, 2012 One- to four family loans [Member] | Sep. 30, 2013 One- to four family loans [Member] | Sep. 30, 2012 One- to four family loans [Member] | Sep. 30, 2012 Commercial Real Estate [Member] | Sep. 30, 2012 Commercial Real Estate [Member] | Sep. 30, 2012 Business [Member] | Sep. 30, 2013 Business [Member] | Sep. 30, 2012 Business [Member]
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts |  |  | 0 | 2 |  | 1 |  |  |  |  | 1 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  |  |  | $ 1,403 |  | $ 484 |  |  |  |  | $ 919 |
Financing Receivable, Modifications, Post-Modification Recorded Investment |  |  |  | 1,268 | 500 | 549 | 500 |  |  |  | 719 |
Financing Receivables, Modifications Number of Contracts | 6 | 7 |  |  | 1 |  | 2 | 1 | 1 | 4 |  | 4
Financing Receivables, Modifications Pre Modification Recorded Investment | 3,583 | 4,123 |  |  | 875 |  | 1,415 | 466 | 466 | 2,242 |  | 2,242
Loan modifications recorded investment | $ 2,708 | $ 3,248 |  |  | $ 0 |  | $ 540 | $ 466 | $ 466 | $ 2,242 |  | $ 2,242
weighted average rate pre modification |  |  |  |  | 8.13% | 7.50% | 6.55% | 12.02% | 12.02% | 7.44% | 6.00% | 7.44%
Weighted average rate post modification |  |  |  |  | 8.13% | 5.50% | 6.07% | 12.02% | 12.02% | 7.44% | 6.00% | 7.44%

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- Definition The number of financing receivables that have been modified in a troubled debt restructuring. + References No definition available. + Details
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- Definition Value of investment in financing receivables (before modification) modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Loan modifications recorded investment + References No definition available. + Details
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- Definition Weighted average rate post modification on TDR loans + References No definition available. + Details
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- Definition weighted average rate pre modification rates on TDR loans + References No definition available. + Details
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- Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition Amount of investment in financing receivables (after modification) modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition Amount of investment in financing receivables (before modification) modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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