Fair Value Measurements

12 Months Ended

Dec. 31, 2017

Fair Value Measurements

The Company determines the fair values of its financial instruments based on a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability;

Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

The following tables summarize assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 and 2016:



	As of December 31, 2017
	Total		Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	(In thousands)
Assets:
Cash equivalents: money-market funds	$	12,606	$	12,606	$	—	$	—
Available-for-sale securities: U.S. treasuries⁽¹⁾	124,670		124,670		—		—
Available-for-sale securities: certificates of deposit ⁽¹⁾	162		162		—		—
Trading securities: mutual funds⁽¹⁾	2,094		2,094		—		—
Foreign currency forward contracts⁽²⁾	1,799		—		1,799		—
Total assets measured at fair value	$	141,331	$	139,532	$	1,799	$	—
Liabilities:
Foreign currency forward contracts⁽³⁾	$	8,192	$	—	$	8,192	$	—
Total liabilities measured at fair value	$	8,192	$	—	$	8,192	$	—

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⁽¹⁾	Included in short-term investments on the Company's consolidated balance sheets.


⁽²⁾	Included in prepaid expenses and other current assets on the Company's consolidated balance sheets.


⁽³⁾	Included in other accrued liabilities on the Company's consolidated balance sheets.



	As of December 31, 2016
	Total		Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	(In thousands)
Assets:
Cash equivalents: money-market funds	$	17,027	$	17,027	$	—	$	—
Available-for-sale securities: U.S. treasuries⁽¹⁾	123,838		123,838		—		—
Available-for-sale securities: certificates of deposit ⁽¹⁾	148		148		—		—
Trading securities: mutual funds⁽¹⁾	1,528		1,528		—		—
Foreign currency forward contracts⁽²⁾	8,763		—		8,763		—
Total assets measured at fair value	$	151,304	$	142,541	$	8,763	$	—
Liabilities:
Foreign currency forward contracts⁽³⁾	$	1,705	$	—	$	1,705	$	—
Total liabilities measured at fair value	$	1,705	$	—	$	1,705	$	—

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⁽¹⁾	Included in short-term investments on the Company's consolidated balance sheets.


⁽²⁾	Included in prepaid expenses and other current assets on the Company's consolidated balance sheets.


⁽³⁾	Included in other accrued liabilities on the Company's consolidated balance sheets.

The Company's investments in cash equivalents and available-for-sale securities are classified within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. The Company enters into foreign currency forward contracts with only those counterparties that have long-term credit ratings of A-/A3 or higher. The Company's foreign currency forward contracts are classified within Level 2 of the fair value hierarchy as they are valued using pricing models that take into account the contract terms as well as currency rates and counterparty credit rates. The Company verifies the reasonableness of these pricing models using observable market data for related inputs into such models. Additionally, the Company includes an adjustment for non-performance risk in the recognized measure of fair value of derivative instruments. As of December 31, 2017 and 2016, the adjustment for non-performance risk did not have a material impact on the fair value of the Company's foreign currency forward contracts. The carrying value of non-financial assets and liabilities measured at fair value in the financial statements on a recurring basis, including accounts receivable and accounts payable, approximate 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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