Fair Value of Financial Instruments - Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Liabilities:
Contingent consideration	$ 53,450	$ 54,967
Recurring \| Total Fair Value
Other noncurrent assets
Marketable securities - restricted (SERP)	568	496
Total assets at fair value	272,059	555,726
Liabilities:
Contingent consideration	53,450	54,967
Total liabilities at fair value	53,450	54,967
Recurring \| Corporate, U.S. government agency and municipal debt securities \| Total Fair Value
Marketable securities
Marketable securities	179,820	368,214
Recurring \| Corporate and municipal debt securities \| Total Fair Value
Long term marketable securities
Long term marketable securities	16,617	93,896
Recurring \| Cash \| Total Fair Value
Assets:
Cash and cash equivalents	35,957	52,181
Recurring \| Money market funds \| Total Fair Value
Assets:
Cash and cash equivalents	39,097	40,939
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Total Fair Value
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Estimate of Fair Value Measurement
Other noncurrent assets
Marketable securities - restricted (SERP)	16	11
Total assets at fair value	75,070	93,131
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate, U.S. government agency and municipal debt securities \| Estimate of Fair Value Measurement
Marketable securities
Marketable securities	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate and municipal debt securities \| Estimate of Fair Value Measurement
Long term marketable securities
Long term marketable securities	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	35,957	52,181
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Money market funds \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	39,097	40,939
Recurring \| Significant Other Observable Inputs (Level 2) \| Total Fair Value
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Estimate of Fair Value Measurement
Other noncurrent assets
Marketable securities - restricted (SERP)	552	485
Total assets at fair value	196,989	462,595
Recurring \| Significant Other Observable Inputs (Level 2) \| Corporate, U.S. government agency and municipal debt securities \| Estimate of Fair Value Measurement
Marketable securities
Marketable securities	179,820	368,214
Recurring \| Significant Other Observable Inputs (Level 2) \| Corporate and municipal debt securities \| Estimate of Fair Value Measurement
Long term marketable securities
Long term marketable securities	16,617	93,896
Recurring \| Significant Other Observable Inputs (Level 2) \| Cash \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Money market funds \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	0	0
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Total Fair Value
Liabilities:
Contingent consideration	53,450	54,967
Total liabilities at fair value	53,450	54,967
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Estimate of Fair Value Measurement
Other noncurrent assets
Marketable securities - restricted (SERP)	0	0
Total assets at fair value	0	0
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Corporate, U.S. government agency and municipal debt securities \| Estimate of Fair Value Measurement
Marketable securities
Marketable securities	0	0
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Corporate and municipal debt securities \| Estimate of Fair Value Measurement
Long term marketable securities
Long term marketable securities	0	0
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Cash \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	0	0
Recurring \| Unobservable Inputs that Reflect the Company's own Assumptions (Level 3) \| Money market funds \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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