Mortgage Loans Held For Investment And Related Assets (Narrative) (Details)	9 Months Ended
	Jan. 31, 2013	Apr. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Loan loss allowance as percent of mortgage loan	4.60%	6.20%
Number of days past due for loans to be charged-off	180 days
Number of days past due to determine allowance for loan losses	60 days
Number of days past due to loan to be considered impaired	60 days
HRB Bank Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total loans	57.00%
Loan Borrowers In Florida, California, New York, And Wisconsin [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total loans	58.00%
Internal Risk Rating, Medium [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan-to-value percentage ratio	80.00%
Internal Risk Rating, Medium [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit score at origination	700
Internal Risk Rating, Low [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit score at origination	700
Internal Risk Rating, Low [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan-to-value percentage ratio	80.00%