CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017
Common Stock, Par Value	$ 0.01	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000,000	200,000,000	200,000,000
Common Stock, Shares Outstanding	59,120,000	59,893,000	61,194,000
Treasury Stock, Shares	20,727,000	19,390,000	17,271,000