Business Developments - Changes in Accrued Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	$ 19,795	$ 0
Additions charged to expense	10,909	28,648
Adjustments	(3,902)
Cash payments	(19,956)	(8,853)
Restructuring Reserve, Ending Balance	6,846	19,795
Severance and other benefits
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	17,675	0
Additions charged to expense	2,340	17,860
Adjustments	(3,902)
Cash payments	(10,994)	(185)
Restructuring Reserve, Ending Balance	5,119	17,675
Professional fees and other related charges
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	2,120	0
Additions charged to expense	8,569	10,788
Adjustments	0
Cash payments	(8,962)	(8,668)
Restructuring Reserve, Ending Balance	$ 1,727	$ 2,120