Mortgage Loans Held for Investment and Related Assets (Schedule of Non-Accrual Loans) (Details) (USD $) In Thousands	Apr. 30, 2011	Apr. 30, 2010
Loans receivable recorded investment nonaccrual status	$ 157,464	$ 160,124
Financing receivable modifications to recorded investments	3,178	31,506
Total non-accrual loans	160,642	191,630
Purchased from SCC [Member]
Loans receivable recorded investment nonaccrual status	143,358
Financing receivable modifications to recorded investments	2,849
All Other [Member]
Loans receivable recorded investment nonaccrual status	14,106
Financing receivable modifications to recorded investments	$ 329

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953670-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953676-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554

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Balance Type:	debit
Period Type:	instant