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Fair Value Measurements - Schedule of Fair Values of Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financial assets: |  |
Cash equivalents | $ 117,688 | $ 55,634
Derivative financial instruments | 4,370 | 618
Total financial assets | 122,058 | 56,252
Financial liabilities: |  |
Derivative financial instruments | 271 |
Contingent consideration | 4,900 | 1,834
Total financial liabilities | 5,171 | 1,834
Level 1 [Member] |  |
Financial assets: |  |
Cash equivalents | 117,688 | 55,634
Total financial assets | 117,688 | 55,634
Level 2 [Member] |  |
Financial assets: |  |
Derivative financial instruments | 4,370 | 618
Total financial assets | 4,370 | 618
Financial liabilities: |  |
Derivative financial instruments | 271 |
Total financial liabilities | 271 |
Level 3 [Member] |  |
Financial liabilities: |  |
Contingent consideration | 4,900 | 1,834
Total financial liabilities | $ 4,900 | $ 1,834

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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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