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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 |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2012 | Mar. 31, 2012
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | $ 34,953 | $ 34,953 | $ 54,588
Mortgage Loans on Real Estate, Number of Loans | 6 | 7 |
Pre-modifcation Outstanding Recorded Investment |  | 4,123 |
Financing Receivable, Modifications, Nature and Extent of Transaction |  | 3248000 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 3,583 | 3,583 |
Financing Receivable, Recorded Investment, Current | 2,708 | 2,708 |
One- to four family loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 6,094 | 6,094 | 6,988
Multifamily Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 1,724 | 1,724 | 2,923
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 14,145 | 14,145 | 24,467
Construction Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 4,258 | 4,258 | 11,325
Commercial Loan [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 8,717 | 8,717 | 8,862
Consumer Loan [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest | 15 | 15 | 23
Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Mortgage Loans on Real Estate, Number of Loans | 1 | 2 |
Pre-modifcation Outstanding Recorded Investment |  | 466 |
Financing Receivable, Modifications, Nature and Extent of Transaction |  | 466 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 466 | 466 |
Financing Receivable, Recorded Investment, Current | 466 | 466 |
weighted average rate pre modification | 12.02% | 6.55% |
Weighted average rate post modification | 12.02% | 6.07% |
Consumer Loan [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Mortgage Loans on Real Estate, Number of Loans | 4 | 4 |
Pre-modifcation Outstanding Recorded Investment |  | 2,242 |
Financing Receivable, Modifications, Nature and Extent of Transaction |  | 2242 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 2,242 | 2,242 |
Financing Receivable, Recorded Investment, Current | 2,242 | 2,242 |
weighted average rate pre modification | 7.44% | 7.44% |
Weighted average rate post modification | 7.44% | 7.44% |
One- to four family loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Mortgage Loans on Real Estate, Number of Loans | 1 |  |
Pre-modifcation Outstanding Recorded Investment |  | 1,415 |
Financing Receivable, Modifications, Nature and Extent of Transaction |  | 540 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 875 | 875 |
Financing Receivable, Recorded Investment, Current | $ 0 | $ 0 |
weighted average rate pre modification | 8.13% |  |
Weighted average rate post modification | 8.13% |  |

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- Definition Description of the nature and the extent of troubled debt restructurings related to financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953670-111524 Reference 2: 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=6965416&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings before the financing receivable has been modified. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953670-111524 Reference 2: 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=6965416&loc=SL6953676-111524 + Details
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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph g -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524 + Details
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- Definition Indicates the number of mortgages under each classification. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.3) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 29 -Paragraph 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=6882300&loc=d3e5864-122674 + Details
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