Impairment and Other Charges (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended				9 Months Ended
	Jul. 16, 2021	Mar. 31, 2021	Jun. 30, 2020	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Loss contingency	$ 200,000
Litigation settlement, charge					$ 143,000
Loss contingency accrual					57,000
Impairment and other charges				$ 0		$ 0		$ 158,973	$ 130,411
A M C N I Reporting Unit
Derivative [Line Items]
Impairment and other charges			$ 105,300
Impairment charge related to goodwill							$ 25,100
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Derivative [Line Items]
Loss on disposal		$ 16,100
Plaintiffs
Derivative [Line Items]
Loss contingency	200,000
Litigation settlement, charge					$ 143,000
Loss contingency accrual	$ 57,000