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Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Supplemental Cash Flow Information [Abstract]        
Cash paid during the period for interest $ 32,489 $ 29,889 $ 97,353 $ 83,474
Cash received during the period for interest 332 1,164 873 2,634
Cash paid during the period for income taxes $ 23,654 $ 21,146 $ 52,488 $ 60,828