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Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Fair Value Disclosures |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 8.40% |  |  |  |
Unrealized Gain (Loss) on Securities |  | $ (13,693) |  | $ 14,651 |  | $ (4,064)
Fair Value, Measurements, Recurring [Member] |  |  |  |  |  |
Fair Value Disclosures |  |  |  |  |  |
Cash and Cash Equivalents |  | 22,883 | [1] | 289,938 | [2] |
Equity investments | [3] | 38,045 |  | 52,683 |  |
Interest rate swaps - liability |  | (589) |  | (149) |  |
Foreign exchange contracts - asset |  | 4,163 |  | 5,499 |  |
Foreign exchange contracts - liability |  | (2,384) |  | (8,581) |  |
Contingent consideration |  |  |  | (3,176) |  |
Total Fair Value Assets And Liabilities Measured On Recurring Basis |  | 62,118 |  | 336,214 |  |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Fair Value Disclosures |  |  |  |  |  |
Cash and Cash Equivalents |  | 22,883 | [1] | 3,267 |  |
Equity investments | [3] | 38,045 |  | 52,683 |  |
Interest rate swaps - asset |  |  |  | 0 |  |
Interest rate swaps - liability |  | 0 |  |  |  |
Foreign exchange contracts - asset |  | 0 |  | 0 |  |
Foreign exchange contracts - liability |  | 0 |  | 0 |  |
Contingent consideration |  |  |  | 0 |  |
Total Fair Value Assets And Liabilities Measured On Recurring Basis |  | 60,928 |  | 55,950 |  |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Fair Value Disclosures |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  | 286,671 | [2] |
Equity investments |  | 0 |  | 0 |  |
Interest rate swaps - liability |  | (589) |  | (149) |  |
Foreign exchange contracts - asset |  | 4,163 |  | 5,499 |  |
Foreign exchange contracts - liability |  | (2,384) |  | (8,581) |  |
Contingent consideration |  |  |  | 0 |  |
Total Fair Value Assets And Liabilities Measured On Recurring Basis |  | 1,190 |  | 283,440 |  |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Disclosures |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  | 0 |  |
Equity investments |  | 0 |  | 0 |  |
Interest rate swaps - asset |  |  |  | 0 |  |
Interest rate swaps - liability |  | 0 |  |  |  |
Foreign exchange contracts - asset |  | 0 |  | 0 |  |
Foreign exchange contracts - liability |  | 0 |  | 0 |  |
Contingent consideration |  |  |  | (3,176) |  |
Total Fair Value Assets And Liabilities Measured On Recurring Basis |  | $ 0 |  | $ (3,176) |  |
[1] | Cash equivalents include highly liquid investments with an original maturity of less than three months.
[2] | Cash equivalents at December 31, 2017 included $286,671 invested in certificates of deposit, with an original maturity of less than three months, held in anticipation of our acquisition of eInfochips, which closed in January 2018 (see Note 2).
[3] | The company has an 8.4% equity ownership interest in Marubun Corporation and a portfolio of mutual funds with quoted market prices. During 2018, 2017, and 2016 the company recorded unrealized gains (loss es) of $(13,693), $14,651, and $(4,064), respectively, on equity securities held at the end of each year.

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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