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Note J - Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Jan. 31, 2014
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] |
|  | Nine Months Ended January 31, |
(in thousands) |  | 2014 |  |  | 2013 |
Supplemental disclosures: |  |  |  |  |  |
Interest paid |  | $ | 2,282 |  |  | $ | 2,081 |
Income taxes paid, net |  |  | 7,578 |  |  |  | 12,407 |
Non-cash transactions: |  |  |  |  |  |  |  |
Inventory acquired in repossession and payment protection plan claims |  |  | 32,842 |  |  |  | 27,909 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration