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Note K - Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Thousands
 9 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Supplemental disclosures:    
Interest paid $ 2,614 $ 2,151
Income taxes paid, net 5,650 7,480
Non-cash transactions:    
Inventory acquired in repossession and payment protection plan claims 31,594 $ 32,188
Purchase of property and equipment using the issuance of debt $ 550