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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2019
Fair Value Disclosures [Abstract] |
Schedule of Assets and liabilities at Fair Value on Recurring Basis | Assets and liabilities carried at fair value on a recurring basis consisted of the following (in thousands):
|  | September 30, 2019 |  |  | December 31, 2018 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held in rabbi trust |  | $ | 9,102 |  |  | $ | — |  |  | $ | 9,102 |  |  | $ | — |  |  | $ | 8,268 |  |  | $ | — |  |  | $ | 8,268 |  |  | $ | — |
Cash equivalents (1) : |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper and other |  | $ | 12,480 |  |  | $ | — |  |  | $ | 12,480 |  |  | $ | — |  |  | $ | 1,599 |  |  | $ | 1,599 |  |  | $ | — |  |  | $ | — |
Money market funds |  |  | 167,321 |  |  |  | 167,321 |  |  |  | — |  |  |  | — |  |  |  | 163,126 |  |  |  | 163,126 |  |  |  | — |  |  |  | — |
|  | $ | 179,801 |  |  | $ | 167,321 |  |  | $ | 12,480 |  |  | $ | — |  |  | $ | 164,725 |  |  | $ | 164,725 |  |  | $ | — |  |  | $ | — |
Marketable securities, available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 109,399 |  |  | $ | 109,399 |  |  | $ | — |  |  | $ | — |  |  | $ | 121,180 |  |  | $ | 121,180 |  |  | $ | — |  |  | $ | — |
U.S. government sponsored entities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,505 |  |  |  | — |  |  |  | 3,505 |  |  |  | — |
Corporate debt securities |  |  | 15,076 |  |  |  | — |  |  |  | 15,076 |  |  |  | — |  |  |  | 11,951 |  |  |  | — |  |  |  | 11,951 |  |  |  | — |
Asset-backed securities and other |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 800 |  |  |  | — |  |  |  | 800 |  |  |  | — |
|  | $ | 124,475 |  |  | $ | 109,399 |  |  | $ | 15,076 |  |  | $ | — |  |  | $ | 137,436 |  |  | $ | 121,180 |  |  | $ | 16,256 |  |  | $ | — |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 30,456 |  |  | $ | 30,456 |  |  | $ | — |  |  | $ | — |  |  | $ | 45,010 |  |  | $ | 45,010 |  |  | $ | — |  |  | $ | — |
U.S. government sponsored entities |  |  | 1,413 |  |  |  | — |  |  |  | 1,413 |  |  |  | — |  |  |  | 1,507 |  |  |  | — |  |  |  | 1,507 |  |  |  | — |
Corporate debt securities |  |  | 30,842 |  |  |  | — |  |  |  | 30,842 |  |  |  | — |  |  |  | 31,837 |  |  |  | — |  |  |  | 31,837 |  |  |  | — |
Asset-backed securities and other |  |  | 8,074 |  |  |  | — |  |  |  | 8,074 |  |  |  | — |  |  |  | 4,855 |  |  |  | — |  |  |  | 4,855 |  |  |  | — |
|  | $ | 70,785 |  |  | $ | 30,456 |  |  | $ | 40,329 |  |  | $ | — |  |  | $ | 83,209 |  |  | $ | 45,010 |  |  | $ | 38,199 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration (2) |  | $ | 2,864 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,864 |  |  | $ | 2,875 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,875 |
Deferred compensation liability |  | $ | 8,192 |  |  | $ | 8,192 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,893 |  |  | $ | 7,893 |  |  | $ | — |  |  | $ | — |
(1) | Included in cash and cash equivalents on the accompanying condensed consolidated balance sheets.
(2) | As of September 30, 2019, contingent consideration has a maximum undiscounted payment of $4.2 million. Assuming the achievement of the applicable performance criteria, the Company anticipates these earn-out payments will be made over the next three to seven-year period. A reconciliation of contingent consideration measured at fair value on a recurring basis consisted of the following (in thousands):
Schedule of Reconciliation of Contingent Consideration Measured at Fair Value on Recurring Basis | Assuming the achievement of the applicable performance criteria, the Company anticipates these earn-out payments will be made over the next three to seven-year period. A reconciliation of contingent consideration measured at fair value on a recurring basis consisted of the following (in thousands):
|  | September 30, 2019 |  |  | December 31, 2018 |
Beginning balance |  | $ | 2,875 |  |  | $ | — |
Contingent consideration in connection with acquisitions |  |  | — |  |  |  | 2,674 |
Change in fair value of contingent consideration |  |  | (11 | ) |  |  | 201 |
Payments of contingent consideration |  |  | — |  |  |  | — |
Ending balance |  | $ | 2,864 |  |  | $ | 2,875 |

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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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