Mortgage Loans Held For Investment And Related Assets (Narrative) (Details)	12 Months Ended
Apr. 30, 2016	Apr. 30, 2015
Mortgage Loans Held For Investment And Related Assets [Line Items]
Allowance as Percent of Principal	2.70%	3.20%
Document Fiscal Year Focus	2016

This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

No definition available.

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Data Type:	xbrli:gYearItemType
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Period Type:	duration