Recently Issued Accounting Pronouncements (Narrative) (Details) (USD $)			12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 ASC 470-20 [Member] years
Convertible notes payable	$ 300,000,000	$ 300,000,000	$ 300,000,000
Convertible senior subordinated notes, stated interest rate			2.125%
Convertible senior subordinated notes, issuance date			May 16, 2007
Convertible senior subordinated notes, effective rate			6.90%
Convertible senior subordinated notes, fair value			221,900,000
Unamortized debt discount	36,313,000	47,549,000	78,100,000
Unamortized debt discount, recognition term (years)			7
Fair value of the embedded conversion option recorded in shareholders' equity			30,700,000
Long-term deferred tax liability charge			30,700,000
Deferred tax assets			32,800,000
Notes' issuance costs reclassified from other long-term assets to additional paid-in capital			2,000,000
Deferred tax assets related to the reclassification of the Notes' issuance costs			$ 800,000