Loss Contingencies Arising From Representations And Warranties of Our Discontinued Mortgage Operations Loss Contingencies Arising From Representations And Warranties of Our Discontinued Mortgage Operations (Contingency Rollforward) (Details) (SCC [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
SCC [Member]
Loss Contingency Accrual [Roll Forward]
Balance, beginning of the year	$ 158,765	$ 130,018	$ 126,260
Provisions	25,000	40,000	20,000
Payments	0	(11,253)	(16,242)
Balance, end of the year	$ 183,765	$ 158,765	$ 130,018