Fair Value of Financial Measurements - Carrying Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Liabilities:
Contingent consideration	$ 53,320	$ 54,967
Recurring
Other assets
Marketable securities - restricted (SERP)	514	496
Total assets at fair value	686,997	555,726
Liabilities:
Contingent consideration	53,320	54,967
Total liabilities at fair value	53,320	54,967
Recurring \| Corporate and municipal debt securities
Marketable securities
Corporate and municipal debt securities	170,126	368,214
Long-term marketable securities
Corporate and municipal debt securities	54,157	93,896
Recurring \| Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	58,442	52,181
Recurring \| Restricted Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	403,758
Recurring \| Money market securities and funds
Cash and cash equivalents
Cash, Restricted Cash and Money market funds		40,939
Recurring \| Level 1
Other assets
Marketable securities - restricted (SERP)	12	11
Total assets at fair value	462,212	93,131
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 1 \| Corporate and municipal debt securities
Marketable securities
Corporate and municipal debt securities	0	0
Long-term marketable securities
Corporate and municipal debt securities	0	0
Recurring \| Level 1 \| Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	58,442	52,181
Recurring \| Level 1 \| Restricted Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	403,758
Recurring \| Level 1 \| Money market securities and funds
Cash and cash equivalents
Cash, Restricted Cash and Money market funds		40,939
Recurring \| Level 2
Other assets
Marketable securities - restricted (SERP)	502	485
Total assets at fair value	224,785	462,595
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 2 \| Corporate and municipal debt securities
Marketable securities
Corporate and municipal debt securities	170,126	368,214
Long-term marketable securities
Corporate and municipal debt securities	54,157	93,896
Recurring \| Level 2 \| Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	0	0
Recurring \| Level 2 \| Restricted Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	0
Recurring \| Level 2 \| Money market securities and funds
Cash and cash equivalents
Cash, Restricted Cash and Money market funds		0
Recurring \| Level 3
Other assets
Marketable securities - restricted (SERP)	0	0
Total assets at fair value	0	0
Liabilities:
Contingent consideration	53,320	54,967
Total liabilities at fair value	53,320	54,967
Recurring \| Level 3 \| Corporate and municipal debt securities
Marketable securities
Corporate and municipal debt securities	0	0
Long-term marketable securities
Corporate and municipal debt securities	0	0
Recurring \| Level 3 \| Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	0	0
Recurring \| Level 3 \| Restricted Cash
Cash and cash equivalents
Cash, Restricted Cash and Money market funds	$ 0
Recurring \| Level 3 \| Money market securities and funds
Cash and cash equivalents
Cash, Restricted Cash and Money market funds		$ 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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