Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis

The following tables present the fair values of the Company’s financial instruments that are measured at fair value on a recurring basis (in thousands):

March 31, 2013	Level 1		Level 2		Level 3		Fair Value
Cash equivalents:
Money market and other funds	113,310		—		—		113,310
Time deposits	3,681		—		—		3,681
Certificates of Deposit	20,387		—		—		20,387
Equity securities	27,827		—		—		27,827
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	14,569		—		—		14,569
Debt securities issued by states of the United States and political subdivisions of the states	4,171		—		—		4,171
Debt securities issued by foreign governments	2,510		—		—		2,510
Corporate debt securities	47,500		—		—		47,500
Total	$	233,955	$	—	$	—	$	233,955
December 31, 2012	Level 1		Level 2		Level 3		Fair Value
Cash equivalents:
Money market and other funds	99,351		—		—		99,351
Time deposits	22,093		—		—		22,093
Certificates of Deposit	34,876		—		—		34,876
Equity securities	23,497		—		—		23,497
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	6,450		—		—		6,450
Debt securities issued by states of the United States and political subdivisions of the states	11,658		—		—		11,658
Debt securities issued by foreign governments	3,589		—		—		3,589
Corporate debt securities	44,826		—		—		44,826
Total	$	246,340	$	—	$	—	$	246,340