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Note B - Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Jan. 31, 2016
Notes Tables  
Property, Plant, and Equipment Useful Life [Table Text Block]
Furniture, fixtures and equipment (years) 3
to
7
Leasehold improvements (years) 5
to
15
Buildings and improvements (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)   2016   2015   2016   2015
Sales – used autos   $ 105,435     $ 103,002     $ 316,269     $ 311,039  
Wholesales – third party     5,097       4,175       16,939       13,734  
Service contract sales     6,784       5,101       20,327       13,084  
Payment protection plan revenue     4,475       4,128       13,521       11,443  
Total   $ 121,791     $ 116,406     $ 367,056     $ 349,300