Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Marketable Securities [Abstract]

Marketable Securities

The following is a summary of available-for-sale marketable securities held as of September 30, 2013 and December 31, 2012 (in thousands):

			Gross Unrealized							Classification Balance Sheet
	Amortized Cost		Gains		Losses			Aggregate Fair Value		Short-Term Marketable Securities		Long-Term Marketable Securities
As of September 30, 2013
Certificates of deposit	$	219	$	—	$	—		$	219	$	171	$	48
Corporate bonds	755,548		1,017		(514		)	756,051		296,783		459,268
U.S. government agency obligations	195,386		45		(197		)	195,234		34,346		160,888
	$	951,153	$	1,062	$	(711	)	$	951,504	$	331,300	$	620,204
As of December 31, 2012
Certificates of deposit	$	3,100	$	—	$	—		$	3,100	$	3,057	$	43
Commercial paper	7,481		2		(1		)	7,482		7,482		—
Corporate bonds	691,931		1,269		(205		)	692,995		217,548		475,447
U.S. government agency obligations	189,607		95		(28		)	189,674		7,505		182,169
	$	892,119	$	1,366	$	(234	)	$	893,251	$	235,592	$	657,659

Schedule of Fair Value Measurement

The following table details the fair value measurements within the fair value hierarchy of the Company’s financial assets and liability at September 30, 2013 and December 31, 2012 (in thousands):

	Total Fair Value			Fair Value Measurements at Reporting Date Using
				Level 1		Level 2		Level 3
As of September 30, 2013
Cash Equivalents and Marketable Securities:
Money market funds	$	778		$	778	$	—	$	—
Certificates of deposit	4,252			4,252		—		—
Corporate bonds	756,051			—		756,051		—
U.S. government agency obligations	195,234			—		195,234		—
	$	956,315		$	5,030	$	951,285	$	—
Other Assets:
Note receivable	$	21,195		$	—	$	—	$	21,195
As of December 31, 2012
Cash Equivalents and Marketable Securities:
Money market funds	$	22,255		$	22,255	$	—	$	—
Certificates of deposit	7,473			7,473		—		—
Commercial paper	9,482			—		9,482		—
Corporate bonds	692,995			—		692,995		—
U.S. government agency obligations	189,674			—		189,674		—
	$	921,879		$	29,728	$	892,151	$	—
Other Liabilities:
Contingent consideration obligation related to Verivue acquisition	$	(1,200	)	$	—	$	—	$	(1,200	)

Schedule of Contractual Maturities of Marketable Securities and Other Investment Related Assets

Contractual maturities of the Company’s available-for-sale marketable securities held at September 30, 2013 and December 31, 2012 were as follows (in thousands):

	September 30, 2013		December 31, 2012
Due in 1 year or less	$	331,300	$	235,592
Due after 1 year through 5 years	620,204		657,659
	$	951,504	$	893,251

Schedule of Fair Value Assets and Liabilties Unobservable Input Reconciliation

The following table reflects the activity for the Company’s major classes of assets and liabilities measured at fair value using Level 3 inputs for the nine months ended September 30, 2013 (in thousands):

	Other Assets: Note Receivable		Other Liabilities: Contingent Consideration Obligation
Balance as of January 1, 2013	$	—	$	(1,200	)
Fair value adjustment to contingent consideration for acquisition of Verivue included in general and administrative expense	—		1,200
Convertible note receivable from divestiture of a business	18,882		—
Unrealized gain on convertible note receivable included in other comprehensive income	2,313		—
Balance as of September 30, 2013	$	21,195	$	—