Loss Contingencies Arising From Representations And Warranties of Our Discontinued Mortgage Operations Loss Contingencies Arising From Representations and Warranties of Our Discontinued Mortgage Operations (Narrative) (Details) $ in Thousands	12 Months Ended	35 Months Ended	36 Months Ended	60 Months Ended	96 Months Ended
	Apr. 30, 2016 USD ($)	Nov. 30, 2007 item	Apr. 30, 2007	Apr. 30, 2013 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2014 USD ($)	Apr. 30, 2012 USD ($)
Loss Contingencies [Line Items]
Percentage of fraud on originated loans			68.00%
Claims received for loans					$ 2,600,000
Document Fiscal Year Focus	2016
Principal Assets of SCC	$ 386,000				386,000
Securitization transactions | item		39
SCC
Loss Contingencies [Line Items]
Claims received for loans				$ 1,900,000
Accrued liability	$ 65,265			$ 183,765	$ 65,265	$ 149,765	$ 158,765