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Restructuring (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 4,889		$ 26,547	$ 26,547
Severance charge			15,395
Property, Plant and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charge			908
Non-cash Charge
Restructuring Cost and Reserve [Line Items]
Restructuring charge			$ 11,152
Office Premises and Employee Severance Charge
Restructuring Cost and Reserve [Line Items]
Restructuring charge		$ 21,658
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 4,889

X

- 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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+ References

No definition available.

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

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