CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Dec. 31, 2011	Jun. 30, 2011
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized (in shares)	210,000,000	210,000,000
Common stock, issued (in shares)	95,704,821	94,939,400
Common stock, outstanding (in shares)	93,774,496	94,238,370
Treasury stock (in shares)	1,930,325	701,030
Series D [Member]
Redeemable convertible preferred stock
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Redeemable convertible preferred stock, authorized (in shares)	3,636	3,636
Redeemable convertible preferred stock, issued (in shares)	0	0
Redeemable convertible preferred stock, outstanding (in shares)	0	0