Restructuring Charges - Restructuring Reserve Activity (Details) - USD ($) $ in Thousands	12 Months Ended	48 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 838	$ 3,270	$ 1,477	$ 16,700
One-time termination benefits
Restructuring Reserve [Roll Forward]
Accrual balance as of December 31, 2018	562
Restructuring charges	838
Utilization	(1,310)
Accrual balance as of December 31, 2019	$ 90	$ 562		$ 90

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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- Definition

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.

+ References

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 420
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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