Restructuring - Activity Related to Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended			5 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Additions charged to expense	$ 779	$ 636	$ 49,000		$ 2,303	$ 14,324
Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning balance				$ 0	2,348
Additions charged to expense				13,974	2,303
Cash payments				(6,902)	(3,536)
Ending balance	1,115	7,072		7,072	1,115	7,072
Severance and other benefits | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning balance				0	1,481
Additions charged to expense				12,400	1,480
Cash payments				(5,379)	(2,257)
Ending balance	704	7,021		7,021	704	7,021
Professional fees and other related charges | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning balance				0	867
Additions charged to expense				1,574	823
Cash payments				(1,523)	(1,279)
Ending balance	$ 411	$ 51		$ 51	$ 411	$ 51