Mortgage Loans Held For Investment And Related Assets (Schedule Of Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Loans and Leases Rollforward [Roll Forward]
Balance at beginning of the period	$ 14,314	$ 26,540
Provision	7,224	10,250
Recoveries	3,250	2,745
Charge-offs	(13,225)	(22,279)
Balance at end of the period	$ 11,563	$ 17,256