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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Cash paid (received) during the period for:      
Interest $ 16,049 $ 18,999 $ 17,691
Income taxes, net of refunds (3,058) 26,835 76,072
Non-cash investing and financing activities:      
Dividends declared $ 64,811 $ 62,066 $ 59,388