Loss Contingencies Arising From Representations and Warranties of Our Discontinued Mortgage Operations (Narrative) (Details) - USD ($) $ in Thousands	36 Months Ended	48 Months Ended	60 Months Ended
	Apr. 30, 2007	Apr. 30, 2012	Apr. 30, 2013	Jul. 31, 2015	Apr. 30, 2015	Jul. 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				$ 9,300	$ 8,900	$ 23,700
Principal Assets of SCC				480,000
SCC [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross				$ 149,765	$ 149,765	$ 193,765	$ 183,765