Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Assets:
Marketable securities	$ 187,560		$ 187,560		$ 198,307
Liabilities:
Transfers into or out of Level 3			0	$ 0
Revaluation of contingent consideration	(3,400)	$ 4,800	(4,600)	$ 21,239
Confluence
Liabilities:
Revaluation of contingent consideration			(4,600)
Recurring
Assets:
Cash equivalents	63,838		63,838		21,678
Marketable securities	187,560		187,560		198,307
Total assets measured at fair value	251,398		251,398		219,985
Liabilities:
Contingent consideration	23,800		23,800		28,400
Total liabilities measured at fair value	23,800		23,800		28,400
Recurring | Level 1
Assets:
Cash equivalents	63,838		63,838		21,678
Total assets measured at fair value	63,838		63,838		21,678
Recurring | Level 2
Assets:
Marketable securities	187,560		187,560		198,307
Total assets measured at fair value	187,560		187,560		198,307
Recurring | Level 3
Liabilities:
Contingent consideration	23,800		23,800		28,400
Total liabilities measured at fair value	$ 23,800		$ 23,800		$ 28,400