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Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Thousands
9 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash paid during the period for:    
Interest $ 20,056 $ 23,981
Income taxes 38,429 35,700
Change in accounts payable related to property, plant, and equipment $ 16,400 $ 6,470