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Note B - Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Jan. 31, 2017
Notes Tables  
Property, Plant, and Equipment Useful Life [Table Text Block]
Furniture, fixtures and equipment (in years)
3
to
7
Leasehold improvements (in years)
5
to
15
Buildings and improvements (in years)
18
to
39
Revenue from External Customers by Products and Services [Table Text Block]
  Three Months Ended
January 31,		   Nine Months Ended
January 31,
(In thousands)   2017   2016   2017   2016
                                 
Sales – used autos   $
103,249
     $
105,435
     $
331,376
     $
316,269
  
Wholesales – third party    
5,764
      
5,097
      
16,710
      
16,939
  
Service contract sales    
7,094
      
6,784
      
21,072
      
20,327
  
Payment protection plan revenue    
5,156
      
4,475
      
14,959
      
13,521
  
                                 
Total   $
121,263
     $
121,791
     $
384,117
     $
367,056