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Note B - Summary of Significant Accounting Policies (Tables)
6 Months Ended
Oct. 31, 2016
Notes Tables  
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
October 31,
  Six Months Ended
October 31,
(In thousands)   2016   2015   2016   2015
                 
Sales – used autos   $ 115,392     $ 100,187     $ 228,127     $ 210,834  
Wholesales – third party     5,529       6,223       10,946       11,842  
Service contract sales     7,217       6,731       13,978       13,543  
Payment protection plan revenue     5,032       4,529       9,803       9,046  
                                 
Total   $ 133,170     $ 117,670     $ 262,854     $ 245,265