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Note B - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Jan. 31, 2015
Accounting Policies [Abstract]  
Property Plant And Equipment, Useful Life [Table Text Block]
Furniture, fixtures and equipment 3 to 7  years
Leasehold improvements 5 to 15  years
Buildings and improvements 18 to 39  years
Revenue from External Customers by Products and Services [Table Text Block]
    Three Months Ended
January 31,
  Nine Months Ended
January 31,
(In thousands)   2015   2014   2015   2014
Sales – used autos   $ 103,002     $ 97,171     $ 311,039     $ 290,221  
Wholesales – third party     4,175       3,855       13,734       13,078  
Service contract sales     5,101       3,758       13,084       11,386  
Payment protection plan revenue     4,128       3,616       11,443       10,629  
                                 
Total   $ 116,406     $ 108,400     $ 349,300     $ 325,314