Debt (Schedule Of Principal Amounts, Unamortized Discount And Net Carrying Amounts Of The Liability Components And the Equity Components For The Convertible Senior Notes) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Principal Balance	$ 400,000	$ 400,000
Unamortized Discount	(700)	(4,991)
Net Carrying Amount	399,300	395,009
Equity Component	$ 48,323	$ 48,323