Fair Value (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value [Abstract]

Fair value of financial assets and liabilities

	Fair Value Measurements as of June 30, 2012:
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Cash equivalents:
Money market funds	$	520,546	$	520,546	$	—	$	—
Commercial paper		1,200		—		1,200		—
Bank certificates of deposit		1,000		—		1,000		—
Short-term investments:
Corporate debt securities		26,084		—		26,084		—
United States government agency securities		2,208		2,208		—		—
United States Treasury securities		17,255		17,255		—		—
Bank certificates of deposit		1,995		—		1,995		—
Commercial paper		1,498		—		1,498		—
Marketable equity securities		2,264		2,264		—		—
Trading securities held in Non-Qualified Deferred Compensation Plan, or NQDC		24,009		24,009		—		—
2015 Notes Hedges		219,199		—		219,199		—
Foreign currency exchange contracts		942		—		942		—
Total Assets	$	818,200	$	566,282	$	251,918	$	—
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Acquisition-related contingent consideration	$	3,997	$	—	$	—	$	3,997
2015 Notes Embedded Conversion Derivative		219,199		—		219,199		—
Total Liabilities	$	223,196	$	—	$	219,199	$	3,997
	Fair Value Measurements as of December 31, 2011:
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Cash equivalents – money market funds	$	484,102	$	484,102	$	—	$	—
Short-term investments:
Marketable equity securities		3,037		3,037		—		—
Trading securities held in NQDC		24,058		24,058		—		—
2015 Notes Hedges		215,113		—		215,113		—
Foreign currency exchange contracts		200		—		200		—
Total Assets	$	726,510	$	511,197	$	215,313	$	—
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Acquisition-related contingent consideration	$	3,911	$	—	$	—	$	3,911
2015 Notes Embedded Conversion Derivative		215,113		—		215,113		—
Total Liabilities	$	219,024	$	—	$	215,113	$	3,911

Liabilities included in level 3 representing fair value of contingent consideration associated with acquisitions

	(In thousands)
Balance as of December 31, 2011	$	3,911
Payments		(39	)
Adjustments		125
Balance as of June 30, 2012	$	3,997