Investments (Tables)

9 Months Ended

Sep. 30, 2011

Investments

Schedule Of Debt Securities By Contractual Maturity Date

	September 30,  2011		December 31, 2010
Due within 1 year	$	21,003	$	14,029
Due within more than 1 year but less than 5 years		27,834		7,383
Due within more than 5 years but less than 10 years		598
Due 10 years or after		2,203		792
Total	$	51,638	$	22,204

Schedule Of Available-For-Sale And Trading Securities

	September 30, 2011		December 31, 2010
Trading	$	2	$	6
Available-for-sale		51,638		22,204
Total	$	51,640	$	22,210

Summary Of Gross Unrealized Gains And Losses And Fair Values

			Gross		Gross
	Amortized		Unrealized		Unrealized	Fair
	Cost		Gains		Losses	Value
September 30, 2011
Debt Securities	$	51,214	$	424	$	$	51,638
December 31, 2010
Debt Securities	$	21,882	$	322	$	$	22,204