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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2019
Fair Value Disclosures [Abstract] |
Schedule of Fair Values of Financial Assets and Liabilities | The fair values of financial assets and liabilities that are recorded at fair value in the Consolidated Balance Sheets and not described above were as follows (in thousands):
|  | As of December 31, 2019 |  |  | As of December 31, 2018 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 99,242 |  |  | $ | 99,242 |  |  | $ | — |  |  | $ | — |  |  | $ | 69,807 |  |  | $ | 69,807 |  |  | $ | — |  |  | $ | — |
Derivative financial instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,765 |  |  |  | — |  |  |  | 1,765 |  |  |  | — |
Total financial assets |  | $ | 99,242 |  |  | $ | 99,242 |  |  | $ | — |  |  | $ | — |  |  | $ | 71,572 |  |  | $ | 69,807 |  |  | $ | 1,765 |  |  | $ | — |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  | $ | 9,446 |  |  | $ | — |  |  | $ | 9,446 |  |  | $ | — |  |  | $ | 2,275 |  |  | $ | — |  |  | $ | 2,275 |  |  | $ | — |
Contingent consideration |  |  | 3,854 |  |  |  | — |  |  |  | — |  |  |  | 3,854 |  |  |  | 5,098 |  |  |  | — |  |  |  | — |  |  |  | 5,098 |
Total financial liabilities |  | $ | 13,300 |  |  | $ | — |  |  | $ | 9,446 |  |  | $ | 3,854 |  |  | $ | 7,373 |  |  | $ | — |  |  | $ | 2,275 |  |  | $ | 5,098 |
Summary of Change in Fair Value of Contingent Consideration | The change in fair value of the contingent consideration (a Level 3 input) was as follows (in thousands):
Contingent consideration liability—January 1, 2019 |  | $ | 5,098 |
Preliminary purchase price |  |  | 2,275 |
Fair value adjustments |  |  | (410 | )
Accretion in valu e |  |  | 564 |
Amounts cancelled |  |  | (371 | )
Amounts paid to sellers |  |  | (3,302 | )
Contingent consideration liability—December 31, 2019 |  | $ | 3,854 |
Summary of Carrying Values and Associated Fair Values of Financial Assets and Liabilities | The carrying values and associated fair values of financial assets and liabilities that are not recorded at fair value in the Consolidated Balance Sheets and not described above include our Senior Notes and investments. To estimate fair values of these items, we utilized third-party quotes which are derived all or in part from model prices, external sources or market prices. Both represent a Level 2 fair value measurement and are as follows (in thousands):
|  | As of December 31, 2019 |  |  | As of December 31, 2018 |
|  | Carrying Value |  |  | Fair Value |  |  | Carrying Value |  |  | Fair Value |
Investments |  | $ | 37,961 |  |  | $ | 37,958 |  |  | $ | 10,060 |  |  | $ | 10,053 |
Senior Notes (1) |  |  | 300,000 |  |  |  | 321,114 |  |  |  | — |  |  |  | — |
(1) | Excludes the impact of unamortized debt issuance costs.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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