Financial Instruments And Fair Value Measurements (Narrative) (Details) (USD $)	12 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009
Other-than-temporary impairment losses, investments, recorded in statement of operations	$ 4,293,000		$ 4,783,000		$ 1,266,000
Cumulative other-than-temporary impairment losses, investments, recorded in AOCI	6,300,000		5,000,000
Cumulative temporary impairment losses and non-credit-based other-than-temporary impairment losses, investments, recorded in other comprehensive income, net of tax	3,900,000		3,100,000
Auction Rate Securities [Member]
Cumulative impairment losses, investments	16,300,000		11,000,000
Cumulative other-than-temporary impairment losses, investments	10,000,000		6,100,000
Other-than-temporary impairment losses, investments, recorded in statement of operations	4,293,000	[1]	4,783,000	[1]
Other than temporary impairment, credit losses	$ (10,000,000)	[1]	$ (6,049,000)	[1]	$ (1,266,000)	[1]
Maximum [Member]
Auction rate securities, interest rate setting interval (in days)	35
Minimum [Member]
Auction rate securities, interest rate setting interval (in days)	7

[1] The amounts in this column are recorded in the consolidated statement of operations.