Litigation And Related Contingencies (Details) (USD $)	12 Months Ended	35 Months Ended
	Apr. 30, 2014 lawsuit	Nov. 30, 2007	Apr. 30, 2013
Loss Contingencies [Line Items]
Document Fiscal Year Focus	2014
Accrued obligations under indemnifications	$ 23,700,000		$ 11,900,000
Number of loans sold to the trust	159
Number Of Lawsuits	18
Securitization Transactions		38
Pending Litigation [Member]
Loss Contingencies [Line Items]
Initial principal on loans securitized	50,000,000
Principal outstanding on loans securitized	36,000,000
SCC [Member]
Loss Contingencies [Line Items]
Original Principal Amount of Loans Securitized	14,000,000,000
Estimated Litigation Liability	$ 4,000,000,000