Mortgage Loans Held For Investment And Related Assets (Schedule Of Mortgage Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Apr. 30, 2012	Jan. 31, 2012	Apr. 30, 2011
Mortgage Loans Held For Investment And Related Assets [Abstract]
Adjustable-rate loans	$ 203,624	$ 238,442
Adjustable-rate loans, percent of total loans	55.00%	56.00%
Fixed-rate loans	168,515	190,870
Fixed-rate loans, percent of total loans	45.00%	44.00%
Total	372,139	429,312
Total loans, percent of total loans	100.00%	100.00%
Unamortized deferred fees and costs	3,004	3,429
Less: Allowance for loan losses	(17,256)	(26,540)	(89,949)	(92,087)
Total	$ 357,887	$ 406,201

Loans And Leases Receivable, Gross Carrying Amount, Percentage Of Total Loans

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Loans Receivable With Fixed Rates Of Interest, Percentage Of Total Loans

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Loans Receivable With Variable Rates Of Interest, Percentage Of Total Loans

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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-Publisher OTS

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-Section 563c.102

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-Chapter V

-Subsection I

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-Name Regulation S-X (SX)

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-Section 03

-Paragraph 7

-Subparagraph d

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-Name Statement of Financial Accounting Standard (FAS)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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- Definition

Reflects the carrying amount of loans charging borrowers fixed rates of interest.

+ References

No definition available.

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Reflects the carrying amount of loans charging borrowers variable, or adjustable, rates of interest.

+ References

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 20

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-Paragraph 21

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