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Fair Value Measurements | 12 Months Ended
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Mar. 31, 2019
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 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):
|  | March 31, 2019 |  | March 31, 2018
|  | Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 496,434 |  |  | $ | — |  |  | $ | — |  |  | $ | 492,535 |  |  | $ | — |  |  | $ | — |
Trading investments for deferred compensation plan included in other assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 4,080 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,881 |  |  | $ | — |  |  | $ | — |
Mutual funds |  | 16,283 |  |  | — |  |  | — |  |  | 14,867 |  |  | — |  |  | — |
Total of trading investments for deferred compensation plan |  | $ | 20,363 |  |  | $ | — |  |  | $ | — |  |  | $ | 17,748 |  |  | $ | — |  |  | $ | — |
Currency derivative assets included in other current assets |  | $ | — |  |  | $ | 455 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Currency derivative liabilities included in accrued and other current liabilities |  | $ | — |  |  | $ | 36 |  |  | $ | — |  |  | $ | — |  |  | $ | 34 |  |  | $ | — |
Investment Securities The marketable securities for the Company's deferred compensation plan are recorded at a fair value of $20.4 million and $17.7 million as of March 31, 2019 and 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 related to trading securities for fiscal years 2019, 2018 and 2017 were not material and are included in other income (expense), net in the consolidated statements of operations. Equity Method Investments The Company has certain non-marketable investments included in other assets that are accounted for under the equity method of accounting, with a carrying value of $6.6 million and $5.1 million as of March 31, 2019 and 2018, 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 long-lived assets during fiscal years 2019, 2018 and 2017. Financial Assets. The Company has certain investments in equity securities of privately held entities 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 the same or similar security from the same issuer. The amount of these investments included in other assets as of March 31, 2019 and March 31, 2018 was $9.5 million and $7.3 million, respectively. There was no impairment of these assets during fiscal years 2019 and 2018. Non-Financial Assets. Goodwill, intangible assets, and property, plant and equipment, are not required to be measured at fair value on a recurring basis. However, if certain triggering events occur (or tested at least annually for goodwill) such that a non-financial instrument is required to be evaluated for impairment and an impairment is recorded to reduce the non-financial instrument's carrying value to the fair value as a result of such triggering events, the non-financial assets and liabilities are measured at fair value for the period such triggering events occur. See Note 2 to the consolidated financial statements for additional information about how the Company tests various asset classes for impairment.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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