Note B - Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Reportable Segments	1
Dividend Restrictions, Maximum Aggregate Amount of Stock Repurchases	$ 40,000,000
Dividend Restrictions, Percentage of Sum of Borrowing Bases	25.00%
Dividend Restrictions, Percentage of Consolidated Net income	75.00%
Dividend Restrictions, Minimum Percentage of Aggregate Funds Available	12.50%
Finance Receivables Interest Rate Range Start	11.00%
Finance Receivable Interest Rate Range End	19.00%
Interest Earned On Financing Receivables	1,800,000	1,800,000
Finance Receivables, Customer Payments Due Either Weekly or Bi-Weekly, Percentage	75.00%
Financing Receivable, Greater Than Or Equal To 30 Days Past Due, Percent Of Portfolio	4.40%	5.10%
Financing Receivable, Average Days Past Due At Charge Off	67 days
Average Age of Account At Charge-Off Date	11 months 3 days
Accounts Receivable Allowance For Credit Losses Percentage	23.50%	21.50%
Financing Receivable, Allowance for Credit Losses, Write-downs	7,700,000
Goodwill, Impairment Loss	0	0
Income Tax Examination, Penalties and Interest Accrued	0	0
Financing Receivable Recorded Investment Greater Than 90 Days Past Due	1,200,000	2,000,000
Late Fee Income Generated by Servicing Financial Assets, Amount	2,200,000	2,000,000	1,700,000
Advertising Expense	4,200,000	4,100,000	3,500,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	329,000	290,000	236,000
Stock Repurchased During Period, Shares (in Shares)	325,598	398,548	1,212,791
Stock Repurchased During Period, Value	$ 12,800,000	$ 17,300,000	$ 39,400,000
Furniture, fixtures, and equipment [Member] | Maximum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Furniture, fixtures, and equipment [Member] | Minimum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Leasehold Improvements [Member] | Maximum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Leasehold Improvements [Member] | Minimum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] | Maximum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	39 years
Building and Building Improvements [Member] | Minimum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	18 years
2006 Employee Stock Purchase Plan [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Common Stock Discount On Shares, Percentage	15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	200,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	163,387
Customer Concentration Risk [Member] | ALASKA | Sales [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage	35.00%
Maximum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Allowance for Credit Losses Primary Factor, Units Repossessed or Charged-off Evaluation Period	5 years
Minimum [Member]
Note B - Summary of Significant Accounting Policies (Details) [Line Items]
Allowance for Credit Losses Primary Factor, Units Repossessed or Charged-off Evaluation Period	1 year