Mortgage Loans Held For Investment And Related Assets (Information Related To Activities Of Non-Performing Assets) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Jan. 31, 2014	Jan. 31, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	$ 138,668	$ 163,582
Interest income on impaired loans	2,720	3,172
Interest income on impaired loans recognized on a cash basis on non-accrual status	2,658	3,095
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	116,061	137,703
Interest income on impaired loans	2,496	2,940
Interest income on impaired loans recognized on a cash basis on non-accrual status	2,438	2,881
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Average impaired loans	22,607	25,879
Interest income on impaired loans	224	232
Interest income on impaired loans recognized on a cash basis on non-accrual status	$ 220	$ 214

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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=28368275&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=28368275&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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