Mortgage Loans Held For Investment And Related Assets (Schedule Of Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Jan. 31, 2014	Jan. 31, 2013
Real Estate Owned Valuation Allowance [Roll Forward]
Balance, beginning of the period	$ 13,968	$ 14,972
Additions	6,389	7,208
Sales	(10,975)	(6,652)
Real Estate Owned, Valuation Allowance, Period Increase (Decrease)	1,152	1,676
Balance, end of the period		$ 13,852

Total carrying amount of mortgage loans as of the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29.6)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

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Period Type:	instant

- Definition

The carrying amount of mortgage loans on real estate that were sold during the reporting period.

+ References

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- Definition

Total amount of additions to mortgage loans other than new loans during the reporting period.

+ References

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Namespace Prefix:	us-gaap_
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Period Type:	duration

- Definition

Total Increase or Decrease in the real estate owned valuation allowance for period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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