CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
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	60,295,000	62,371,000	62,776,000
Treasury Stock, Shares	18,451,000	15,691,000	14,762,000