Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charges - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 49,994	$ 0	$ 0
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	25,088
Contract exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	13,993
Pension and termination benefit charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 10,913