Restructuring Charges 2020 Plan Restructuring Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 1,500,000	$ 0.0
Lease impairment costs	(400,000)	0.0
Other restructuring costs	200,000	0.0
Restructuring charges	1,300,000	$ 0.0
Restructuring Reserve	32,800,000		$ 74,600,000
DXTRA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	800,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	32,800,000		74,600,000
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0		0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0		$ 0.0
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	200,000
Lease impairment costs	(400,000)
Other restructuring costs	0.0
Restructuring charges	(200,000)
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	43,100,000
Lease impairment costs	0.0
Other restructuring costs	200,000
Restructuring charges	$ 43,300,000