Fair Value of Financial Instruments - Carrying Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Liabilities:
Contingent consideration	$ 56,885	$ 80,477
Recurring
Other assets
Marketable securities - restricted (SERP)	478	630
Total assets at fair value	508,638	459,476
Liabilities:
Contingent consideration	56,885	80,477
Total liabilities at fair value	56,885	80,477
Recurring \| Corporate Debt Securities
Marketable securities
Corporate and municipal debt securities	187,359	136,246
Long-term marketable securities
Corporate and municipal debt securities	147,373	119,166
Recurring \| Cash
Cash and cash equivalents
Cash and Money market funds	135,199	148,863
Recurring \| Money market securities and commercial paper
Cash and cash equivalents
Cash and Money market funds	38,229
Recurring \| Money market securities and funds
Cash and cash equivalents
Cash and Money market funds		54,571
Recurring \| Level 1
Other assets
Marketable securities - restricted (SERP)	9	7
Total assets at fair value	160,993	203,692
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 1 \| Corporate Debt Securities
Marketable securities
Corporate and municipal debt securities	0	251
Long-term marketable securities
Corporate and municipal debt securities	0	0
Recurring \| Level 1 \| Cash
Cash and cash equivalents
Cash and Money market funds	135,199	148,863
Recurring \| Level 1 \| Money market securities and commercial paper
Cash and cash equivalents
Cash and Money market funds	25,785
Recurring \| Level 1 \| Money market securities and funds
Cash and cash equivalents
Cash and Money market funds		54,571
Recurring \| Level 2
Other assets
Marketable securities - restricted (SERP)	469	623
Total assets at fair value	347,645	255,784
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 2 \| Corporate Debt Securities
Marketable securities
Corporate and municipal debt securities	187,359	135,995
Long-term marketable securities
Corporate and municipal debt securities	147,373	119,166
Recurring \| Level 2 \| Cash
Cash and cash equivalents
Cash and Money market funds	0	0
Recurring \| Level 2 \| Money market securities and commercial paper
Cash and cash equivalents
Cash and Money market funds	12,444
Recurring \| Level 2 \| Money market securities and funds
Cash and cash equivalents
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	56,885	80,477
Total liabilities at fair value	56,885	80,477
Recurring \| Level 3 \| Corporate 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 and Money market funds	0	0
Recurring \| Level 3 \| Money market securities and commercial paper
Cash and cash equivalents
Cash and Money market funds	$ 0
Recurring \| Level 3 \| Money market securities and funds
Cash and cash equivalents
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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