Financial Instruments And Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended				6 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2012		Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Credit based OTTI losses recorded in Statement of Operations	$ 600,000	[1]		[1]	$ 600,000	[1]		[1]
Auction Rate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Credit based OTTI losses recorded in Statement of Operations					600,000
Auction rate securities, cost basis	46,625,000		0		46,625,000		0
Auction rate securities, carrying value	32,625,000		0		32,625,000		0
Gain on sale of auction rate securities	4,094,000		0		4,094,000		0
Auction rate security, original cost	$ 6,000,000				$ 6,000,000
Auction Rate Securities [Member] | Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Auction rate securities, interest rate setting interval (in days)					7 days
Auction Rate Securities [Member] | Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Auction rate securities, interest rate setting interval (in days)					35 days

[1] See Note 3 "Financial Instruments and Fair Value Measurements" in Notes to Consolidated Financial Statements.