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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - shares
Sep. 30, 2018
Jun. 30, 2018
Statement of Financial Position [Abstract]    
Common stock authorized (in shares) 100,000,000 100,000,000
Common stock issued (in shares) 55,788,737 55,712,229
Common stock outstanding (in shares) 47,365,484 47,191,744
Common stock in treasury (in shares) 8,423,253 8,520,485