CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 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	58,212,000	59,893,000	60,295,000
Treasury Stock, Shares	21,883,000	19,390,000	18,451,000