Mortgage Loans Held For Investment And Related Assets (Information Related To Activities Of Non-Performing Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	$ 245,807	$ 289,755	$ 307,351
Interest income on impaired loans	5,899	6,624	8,548
Interest income on impaired loans recognized on a cash basis on non-accrual status	5,682	6,311	7,452
Purchased From SCC [Member]
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	211,867	252,673
Interest income on impaired loans	5,454	5,795
Interest income on impaired loans recognized on a cash basis on non-accrual status	5,265	5,567
All Other [Member]
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	33,940	37,082
Interest income on impaired loans	445	829
Interest income on impaired loans recognized on a cash basis on non-accrual status	$ 417	$ 744

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The average recorded investment related to impaired 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 15

-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524

-Subparagraph (c)(1)

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5258-111524

+ Details

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- Definition

The interest income recognized during the time within that period that the financing receivables were impaired.

+ References

+ Details

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- Definition

The interest income recognized on a cash-basis method of accounting during the time within that period that the financing receivables were impaired.

+ References

+ Details

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