Mortgage Loans Held For Investment And Related Assets (Information Related To Activities Of Non-Performing Assets) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Oct. 31, 2013	Oct. 31, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	$ 145,178	$ 167,864
Interest income on impaired loans	1,863	2,150
Interest income on impaired loans recognized on a cash basis on non-accrual status	1,823	2,101
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	121,532	141,521
Interest income on impaired loans	1,727	1,992
Interest income on impaired loans recognized on a cash basis on non-accrual status	1,689	1,956
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	23,646	26,343
Interest income on impaired loans	136	158
Interest income on impaired loans recognized on a cash basis on non-accrual status	$ 134	$ 145

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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=7512638&loc=d3e5258-111524

+ Details

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

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- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

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