Cash And Cash Equivalents And Investments (Tables)

9 Months Ended

Sep. 30, 2011

Cash And Cash Equivalents And Investments

Summary Of Cash And Cash Equivalents And Investments By Balance Sheet Classification

	September 30, 2011				December 31, 2010
	Cost		Fair Value (1)		Cost		Fair Value (1)
Cash and cash equivalents	$	193,798	$	193,798	$	356,533	$	356,533
Short-term investments		38,073		37,132		90,466		90,284
Long-term investments		26,086		25,799		45,647		45,466
Total cash and cash equivalents and investments	$	257,957	$	256,729	$	492,646	$	492,283

(1) See Note 16 – Fair Value Measurements for details regarding fair value measurements.

Summary Of Investments By Category

	September 30, 2011				December 31, 2010
Investment category:	Cost		Fair Value		Cost		Fair Value
Available-for-sale securities:
U.S. treasury securities	$	3,430	$	3,429	$	24,500	$	24,511
U.S. agency securities		8,110		8,074		35,407		35,387
Commercial paper		—		—		14,958		14,984
Corporate notes/bonds		50,461		49,270		51,561		51,181
Certificates/term deposits		2,158		2,158		9,687		9,687
Total investments	$	64,159	$	62,931	$	136,113	$	135,750