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Mortgage Loans Held For Investment And Related Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Jan. 31, 2012 | Apr. 30, 2011
Mortgage Loans Held For Investment And Related Assets [Line Items] |  |
Loan loss reserve as a percentage of mortgage loans | 17.40% | 16.10%
Percentage of mortgage loan portfolio consisting of borrowers from Florida, California and New York | 52.00% |
Loans held for investment | $ 192.4 |
In-substance foreclosures | $ 5.7 | $ 7.7
HRB Bank Interest-Only Mortgage [Member] |  |
Mortgage Loans Held For Investment And Related Assets [Line Items] |  |
Percent of loans purchased | 63.00% |
Minimum Credit Score [Member] |  |
Mortgage Loans Held For Investment And Related Assets [Line Items] |  |
Loan-to-value at origination in order to have internal risk rating of medium | 80.00% |
Minimum credit score to be given internal risk rating of low | 700 |
Maximum Credit Score [Member] |  |
Mortgage Loans Held For Investment And Related Assets [Line Items] |  |
Loan-to-value at origination in order to have internal risk rating of medium | 80.00% |
Maximum credit score to be given internal risk rating of medium | 700 |

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