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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2016
Jun. 30, 2015
Statement of Financial Position [Abstract]    
Accounts receivable trade, allowance for doubtful accounts $ 6,740 $ 5,987
Common stock, shares outstanding (in shares) 121,404,677 122,293,986
Common stock, shares issued (in shares) 121,404,677 122,293,986
Treasury stock, shares (in shares) 633,647 625,725