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Cash Flow (Tables)
 9 Months Ended
Jan. 31, 2016
Supplemental Cash Flow Information [Abstract]  
Supplemental Disclosures of Cash Flow Information
Supplemental disclosures of cash flow information:
 

Nine Months Ended
 

January 31,
(in thousands)

2016

2015
Cash paid during the period for:

 

 
Interest

$
359


$
414

Income taxes

$
23,186


$
10,608