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Mortgage Loans Held For Investment And Related Assets (Schedule Of Allowance For Loan Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2014
Mortgage Loans Held For Investment And Related Assets [Abstract]      
Document Fiscal Year Focus 2016    
Loans and Leases Rollforward [Roll Forward]      
Balance as of the beginning of the year $ 7,886 $ 11,272 $ 14,314
Provision (1,173) (10) 8,271
Recoveries 1,797 1,393 4,040
Charge-offs (2,992) (4,769) (15,353)
Balance as of the end of the year $ 5,518 $ 7,886 $ 11,272