Loss Contingencies Arising From Representations and Warranties of Our Discontinued Mortgage Operations (Narrative) (Details) - USD ($) $ in Thousands	36 Months Ended	60 Months Ended	90 Months Ended
	Apr. 30, 2007	Apr. 30, 2013	Oct. 31, 2015	Apr. 30, 2015	Oct. 31, 2014	Apr. 30, 2014
Loss Contingencies [Line Items]
Percentage of fraud on originated loans	68.00%
Claims received for loans		$ 1,900,000	$ 2,600,000
Loss Contingency Accrual			6,200	$ 8,900	$ 10,300
Principal Assets of SCC			479,000
SCC [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross			$ 153,765	$ 149,765	$ 193,765	$ 183,765