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Note C - Finance Receivables (Details) - Components of Finance Receivables (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2014
Apr. 30, 2014
Oct. 31, 2013
Apr. 30, 2013
Components of Finance Receivables [Abstract]        
Gross contract amount $ 467,526 $ 432,327    
Less unearned finance charges (56,026) (52,995)    
Principal balance 411,500 379,332 388,799  
Less allowance for credit losses (92,460) (86,033) (80,699) (75,345)
Finance receivables, net $ 319,040 $ 293,299 $ 308,100 $ 288,049