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Note B - Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
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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 |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition All amounts that are due to the servicer of a financial asset as a result of the debt holder not meeting the monthly payment terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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