Restructuring Charges - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended	48 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring costs	$ 838	$ 3,270	$ 1,477	$ 16,700
Restructuring, expected cost	$ 16,700			$ 16,700

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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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration