Mortgage Loans Held For Investment And Related Assets (Information Related To Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	$ 118,927	$ 142,916
Related Allowance	6,764	8,686
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	98,999	118,383
Related Allowance	3,239	6,573
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	19,928	24,533
Related Allowance	3,525	2,113
Balance With Allowance
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	33,100	41,392
Balance With Allowance | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	27,924	33,791
Balance With Allowance | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	5,176	7,601
Balance With No Allowance
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	85,827	101,524
Balance With No Allowance | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	71,075	84,592
Balance With No Allowance | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Impaired Loans Balance	$ 14,752	$ 16,932