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Restructuring Charges - General (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring charges
Restructuring charges	$ 313	$ 2,900		$ 1,953	$ 7,036
Severance costs
Restructuring charges
Restructuring charges	224	1,402		1,717	5,538
Organizational Restructuring
Restructuring charges
Restructuring charges		(33)			1,695
Estimated additional charges	0			0
Organizational Restructuring | Severance costs
Restructuring charges
Restructuring charges		(33)	$ 1,700		1,695
Pandemic Restructuring
Restructuring charges
Restructuring charges	224	1,435		1,717	3,843
Estimated additional charges	0			0
Pandemic Restructuring | Severance costs
Restructuring charges
Restructuring charges	224	1,435		1,717	3,843
Restructuring charges incurred to date	7,000			7,000
Property Restructuring
Restructuring charges
Restructuring charges	19	$ 1,498		35	$ 1,498
Restructuring charges incurred to date	1,500			1,500
Facility Exit Plan
Restructuring charges
Estimated additional charges	$ 800			$ 800

X

- Definition

Amount of costs incurred to date for the specified restructuring cost.

+ References

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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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