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Note M - Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2014
Supplemental disclosures:      
Interest paid $ 3,536 $ 2,885 $ 3,023
Income taxes paid, net 7,811 13,409 12,153
Non-cash transactions:      
Inventory acquired in repossession and payment protection plan claims 43,766 $ 44,838 $ 47,297
Purchase of property and equipment using the issuance of debt 550
Loss accrued on disposal of property and equipment $ 300