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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Disclosures |
Year ended June 30 (in thousands) | 2017 |  | 2016 |  | 2015
Cash paid during the period for: |  |  |  |  |
Interest | $ | 27,529 |  |  | $ | 26,250 |  |  | $ | 30,984 |
Income taxes | 16,755 |  |  | 43,733 |  |  | 40,295 |
Supplemental disclosure of non-cash information: |  |  |  |  |
Changes in accounts payable related to purchases of property, plant and equipment | (3,900 | ) |  | 1,000 |  |  | (9,900 | )

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