Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2014

The Company reviews the pricing inputs by obtaining prices from a different source for the same security on a sample of its portfolio. The Company has not adjusted the pricing inputs it has obtained. The following table presents the financial instruments that are carried at fair value and summarizes the valuation of its cash equivalents and marketable securities by the above pricing levels as of March 31, 2014 and December 31, 2013:



	As of March 31, 2014
	Total		Quoted Market Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market funds	$	317,769	$	317,769	$	—	$	—
Corporate notes, bonds and commercial paper	58,347		—		58,347		—
Total available-for-sale securities	$	376,116	$	317,769	$	58,347	$	—



	As of December 31, 2013
	Total		Quoted Market Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market funds	$	300,605	$	300,605	$	—	$	—
Corporate notes, bonds and commercial paper	58,492		—		58,492		—
Total available-for-sale securities	$	359,097	$	300,605	$	58,492	$	—

The following table presents the financial instruments that are measured on a nonrecurring basis as of March 31, 2014:



	As of March 31, 2014
(in thousands)	Carrying Value		Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Impairment charges for the three months ended March 31, 2014
Investment in non-marketable securities	$	600	$	—	$	—	$	600	$	—

The Company monitors its investments for other-than-temporary impairment and records appropriate reductions in carrying value when necessary. The Company monitors its investments for other-than-temporary losses by considering current factors, including the economic environment, market conditions, operational performance and other specific factors relating to the business underlying the investment, reductions in carrying values when necessary and the Company’s ability and intent to hold the investment for a period of time which may be sufficient for anticipated recovery in the market. Any other-than-temporary loss is reported under “Interest and other income (expense), net” in the condensed consolidated statement of operations. For the three months ended March 31, 2014 and 2013, the Company did not incur any impairment loss on its investments.

Additionally, the Company cannot provide any assurance that its non-marketable equity security will not be further impacted by adverse changes in the general market conditions or deterioration in business prospects of the investee, which may require the Company in the future to record additional impairment charges which could adversely impact its financial results.

For the three months ended March 31, 2014 and 2013, there were no transfers of financial instruments between different categories of fair value.

The following table presents the financial instruments that are not carried at fair value but require fair value disclosure as of March 31, 2014 and December 31, 2013:



	As of March 31, 2014						As of December 31, 2013
(In thousands)	Face Value		Carrying Value		Fair Value		Face Value		Carrying Value		Fair Value
5% Convertible Senior Notes due 2014 (the "2014 Notes")	$	172,500	$	168,658	$	173,846	$	172,500	$	164,047	$	175,821
1.125% Convertible Senior Notes due 2018 (the "2018 Notes")	$	138,000	$	110,962	$	155,824	$	138,000	$	109,629	$	142,427

The fair value of the convertible notes at each balance sheet date is determined based on recent quoted market prices for these notes which is a level two measurement. As discussed in Note 8, "Convertible Notes," as of March 31, 2014, the 2014 Notes and 2018 Notes are carried at their face value of $172.5 million and $138.0 million, respectively, less any unamortized debt discount. The carrying value of other financial instruments, including accounts receivable, accounts payable and other accrued liabilities, approximates fair value due to their short maturities.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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