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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Statement Condensed Consolidated Balance Sheets [Abstract]    
Accounts receivable, allowances $ 6,359 $ 6,327
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares issued 27,888,217 27,888,217
Common stock, shares outstanding 27,019,817 26,853,823
Treasury stock, shares 868,400 1,034,394