Loss Contingencies Arising From Representations and Warranties of Our Discontinued Mortgage Operations (Narrative) (Details) - USD ($) $ in Thousands	36 Months Ended	60 Months Ended	102 Months Ended
	Apr. 30, 2007	Apr. 30, 2013	Oct. 31, 2016	Apr. 30, 2016	Oct. 31, 2015	Apr. 30, 2015
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			2,300	$ 2,300	$ 6,200
Principal Assets of SCC			346,000
SCC [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross			$ 25,500	$ 65,265	$ 153,765	$ 149,765