Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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):

June 30, 2013	Level 1		Level 2		Level 3		Fair Value
Cash equivalents:
Money market and other funds	124,047		—		—		124,047
Time deposits	5,142		—		—		5,142
Municipal bonds	500		—		—		500
Corporate commercial papers	6,998		—		—		6,998
Certificates of deposit	17,108		—		—		17,108
Equity securities	31,483		—		—		31,483
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	15,137		—		—		15,137
Debt securities issued by states of the U.S. and political subdivisions of the states	4,743		—		—		4,743
Debt securities issued by foreign governments	4,502		—		—		4,502
Corporate debt securities	64,976		—		—		64,976
Total	$	274,636	$	—	$	—	$	274,636
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
Municipal bonds	—		—		—		—
Corporate commercial papers	—		—		—		—
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 U.S. 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