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Mortgage Loans Held For Investment And Related Assets (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified | Jan. 31, 2013 | Apr. 30, 2012
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | $ 372,139 | $ 429,312
Occupancy Status, Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 256,650 |
Occupancy Status, Non-Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 115,489 |
Documentation Level, Full Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 185,004 |
Documentation Level, Limited Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 23,664 |
Documentation Level, Stated Income [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 134,485 |
Documentation Level, No Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 28,986 |
Internal Risk Rating, High [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 68,645 |
Internal Risk Rating, Medium [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 143,605 |
Internal Risk Rating, Low [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 159,889 |
Purchased From SCC [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 212,250 |
Purchased From SCC [Member] | Occupancy Status, Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 154,470 |
Purchased From SCC [Member] | Occupancy Status, Non-Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 57,780 |
Purchased From SCC [Member] | Documentation Level, Full Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 68,413 |
Purchased From SCC [Member] | Documentation Level, Limited Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 6,889 |
Purchased From SCC [Member] | Documentation Level, Stated Income [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 118,100 |
Purchased From SCC [Member] | Documentation Level, No Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 18,848 |
Purchased From SCC [Member] | Internal Risk Rating, High [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 68,645 |
Purchased From SCC [Member] | Internal Risk Rating, Medium [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 143,605 |
All Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 159,889 |
All Other [Member] | Occupancy Status, Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 102,180 |
All Other [Member] | Occupancy Status, Non-Owner Occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 57,709 |
All Other [Member] | Documentation Level, Full Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 116,591 |
All Other [Member] | Documentation Level, Limited Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 16,775 |
All Other [Member] | Documentation Level, Stated Income [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 16,385 |
All Other [Member] | Documentation Level, No Documentation [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | 10,138 |
All Other [Member] | Internal Risk Rating, Low [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Portfolio | $ 159,889 |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -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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