Note 4. Fair-Value Measurements

6 Months Ended

Jun. 30, 2015

Fair-Value Measurements

Assets and liabilities reported at fair value are classified in one of the following three levels within the fair-value hierarchy:

Level 1: Quoted market prices in active markets for identical assets or liabilities

Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data

Level 3: Unobservable inputs that are not corroborated by market data

Financial Assets Measured at Fair Value on a Recurring Basis

The following table summarizes the valuation of financial instruments within the fair-value hierarchy:



	June 30, 2015
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	369,874	$	77,092	$	292,782	$	—
Marketable securities	$	8,285	$	—	$	8,285	$	—



	December 31, 2014
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	385,548	$	63,092	$	322,456	$	—
Marketable securities	$	8,285	$	—	$	8,285	$	—

Cash equivalents consist of short-term interest-bearing instruments (primarily commercial paper, certificates of deposit and money-market funds) with maturities of three months or less at the date of purchase. Current marketable securities consist of variable-rate demand notes.

Money-market funds reflect their published net asset value and are classified as Level 1 instruments. Commercial paper, certificates of deposit and variable-rate demand notes are generally valued using published interest rates for instruments with similar terms and maturities, and accordingly, are classified as Level 2 instruments. At June 30, 2015, the weighted-average days to maturity of the cash equivalents and marketable securities was less than one month. Based on their short maturities, the carrying amount of the cash equivalents and marketable securities approximates their fair value.

- 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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