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Supplemental Cash Flow Disclosures (Tables)
9 Months Ended
Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Disclosures
 
Nine Months Ended March 31,
(in thousands)
2018
 
2017
Cash paid during the period for:
 
 
 
Income taxes
$
24,087

 
$
20,013

Interest
21,091

 
20,725

Supplemental disclosure of non-cash information:
 
 
 
Changes in accounts payable related to purchases of property, plant and equipment
11,477

 
15,404