Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Summary Of Fair Value Of Financial Assets

			December 31, 2011
	Total		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash and cash equivalents	$	1,326	$	1,326	$	—	$	—
Investments available-for-sale		1,978		25		—		1,953
	$	3,304	$	1,351	$	—	$	1,953

			December 31, 2010
	Total		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash and cash equivalents	$	2,114	$	2,114	$	—	$	—
Investments available-for-sale		2,151		25		—		2,126
	$	4,265	$	2,139	$	—	$	2,126

Schedule Of Auction Rate Securities

	Par Value		Temporary Impairment		Carrying Value
Non-current investments available-for-sale	$	2,500	$	547	$	1,953

Assets Measured At Fair Value Using Level 3

Balance as of December 31, 2008	$	3,779
Transfers into level 3		—
Transfers out of level 3		(75	)
Purchases, sales, issuances and settlements		(1,700	)
Unrealized losses included in accumulated other comprehensive loss		(28	)
Balance as of December 31, 2009		1,976
Transfers into level 3		—
Transfers out of level 3		(25	)
Purchases, sales, issuances and settlements		(25	)
Unrealized gains included in accumulated other comprehensive loss		200
Balance as of December 31, 2010		2,126
Transfers into level 3		—
Transfers out of level 3		(25	)
Purchases, sales, issuances and settlements		(25	)
Unrealized losses included in accumulated other comprehensive loss		(123	)
Balance as of December 31, 2011	$	1,953