Fair Value Measurements

The Company considers fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. The Company utilizes the following three-level fair value hierarchy to establish the priorities of the inputs used to measure fair value:

•Level 1 — Quoted prices in active markets for identical assets or liabilities.

•Level 2 — Observable inputs other than quoted market prices included in Level 1, such as: quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

•Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

The following table presents the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis, excluding assets related to the Company’s defined benefit pension plans, classified by the level within the fair value hierarchy (in thousands):



	June 30, 2018						March 31, 2018
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Cash equivalents	$	482,882	$	—	$	—	$	492,535	$	—	$	—

Trading investments for deferred compensation plan included in other assets:
Money market funds	$	3,994	$	—	$	—	$	2,881	$	—	$	—
Mutual funds	16,011		—		—		14,867		—		—
Total of trading investments for deferred compensation plan	$	20,005	$	—	$	—	$	17,748	$	—	$	—

Currency exchange derivative assets included in other current assets	$	—	$	275	$	—	$	—	$	—	$	—

Liabilities:
Currency exchange derivative liabilities included in accrued and other current liabilities	$	—	$	45	$	—	$	—	$	34	$	—

Investment Securities

The marketable securities for the Company's deferred compensation plan were recorded at a fair value of $20.0 million and $17.7 million, as of June 30, 2018 and March 31, 2018, respectively, based on quoted market prices. Quoted market prices are observable inputs that are classified as Level 1 within the fair value hierarchy. Unrealized trading gains (losses) related to trading securities for the three months ended June 30, 2018 and 2017 were not material and are included in other expense, net in the Company's condensed consolidated statements of operations.

Non-marketable Investments

The Company has certain non-marketable investments included in other assets that are accounted for under the equity method of accounting, with carrying value of $5.3 million and $5.1 million as of June 30, 2018 and March 31, 2018, respectively.

In addition, the Company has certain investments without readily determinable fair values due to the absence of quoted market prices, the inherent lack of liquidity, and the fact that inputs used to measure fair value are unobservable and require management's judgment. When certain events or circumstances indicate that impairment may exist, the Company revalues the investments using various assumptions, including the financial metrics and ratios of comparable public companies. The carrying value is also adjusted for observable price changes with a same or similar security from the same issuer. The amount of these investments included in other assets as of June 30, 2018 and March 31, 2018 was $7.3 million and $7.3 million, respectively.

Assets Measured at Fair Value on a Nonrecurring Basis

The Company’s non-financial assets, such as intangible assets and acquisition-related property, plant and equipment, are recorded at fair value only upon initial recognition or if an impairment is recognized. There was no impairment of these assets during the three months ended June 30, 2018 or 2017.