Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Financial Instruments [Abstract]

Summary Of Fair Value Of Financial Assets

			Quoted prices in
			active markets for		Significant other		Significant
			identical assets		observable inputs		unobservable inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Investments available-for-sale		2,078		-		-		2,078

Schedule Of Auction Rate Securities

	Par Value	Temporary Impairment	Carrying Value
Investments available-for-sale	$      2,400	$     322	$       2,078

Assets Measured At Fair Value Using Level 3

Balance as of December 31, 2012	$	2,037
Transfers into level 3		-
Transfers out of level 3		-
Purchases, sales, issuances and settlements		(25)
Unrealized gains included in accumulated loss		-
Balance as of March 31, 2013		2,012
Transfers into level 3		-
Transfers out of level 3		-
Unrealized gains included in accumulated loss		91
Balance as of June 30, 2013		2,103
Transfers into level 3		-
Transfers out of level 3		-
Purchases, sales, issuances and settlements		(25)
Unrealized gains included in accumulated loss		-
Balance as of September 30, 2013	$	2,078