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Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Liabilities, Fair Value Disclosure [Abstract] |  |
Accruals and other current liabilities | $ 2,884 | $ 5,100
Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 35,043 | 70,000
Liabilities, Fair Value Disclosure [Abstract] |  |
Acquisition contingent consideration | 4,299 | 6,599
Deferred compensation plan | 2,591 | 2,544
Cash-settled equity awards | 195 |
Total liabilities | 7,085 | 9,143
Accruals and other current liabilities | 2,884 | 5,100
Deferred compensation plan, current | 169 | 153
Fair Value, Recurring | Money Market Funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds | 34,696 | 70,000
Fair Value, Recurring | Interest Rate Swap |  |
Assets, Fair Value Disclosure [Abstract] |  |
Interest rate swap | 347 |
Level 1 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 34,696 | 70,000
Liabilities, Fair Value Disclosure [Abstract] |  |
Acquisition contingent consideration | 0 | 0
Deferred compensation plan | 2,591 | 2,544
Cash-settled equity awards | 195 |
Total liabilities | 2,786 | 2,544
Level 1 | Fair Value, Recurring | Money Market Funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds | 34,696 | 70,000
Level 1 | Fair Value, Recurring | Interest Rate Swap |  |
Assets, Fair Value Disclosure [Abstract] |  |
Interest rate swap | 0 |
Level 2 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 347 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Acquisition contingent consideration | 0 | 0
Deferred compensation plan | 0 | 0
Cash-settled equity awards | 0 |
Total liabilities | 0 | 0
Level 2 | Fair Value, Recurring | Money Market Funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds | 0 | 0
Level 2 | Fair Value, Recurring | Interest Rate Swap |  |
Assets, Fair Value Disclosure [Abstract] |  |
Interest rate swap | 347 |
Level 3 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Acquisition contingent consideration | 4,299 | 6,599
Deferred compensation plan | 0 | 0
Cash-settled equity awards | 0 |
Total liabilities | 4,299 | 6,599
Level 3 | Fair Value, Recurring | Money Market Funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds | 0 | $ 0
Level 3 | Fair Value, Recurring | Interest Rate Swap |  |
Assets, Fair Value Disclosure [Abstract] |  |
Interest rate swap | $ 0 |

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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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