Loss Contingencies Arising From Representations And Warranties of Our Discontinued Mortgage Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2015	Apr. 30, 2014
Loss Contingency Accrual [Roll Forward]
Provisions	$ 9,300	$ 23,700
SCC [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross	149,765	193,765	$ 149,765	$ 183,765
Loss Contingency Accrual [Roll Forward]
Payments	0	0
Balance, end of the period	$ 0	$ 10,000