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Employee Benefits - Accumulated Benefit Obligation (Detail) - Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
U.S Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation — end of year	$ 679,957	$ 618,486
Projected benefit obligation	60,313	55,714
Accumulated benefit obligation	60,012	55,671
Fair value of plan assets	$ 2,389	$ 2,229
Discount rate	2.51%	3.26%
Rate of compensation increase	3.25%	3.25%
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation — end of year	$ 1,243,461	$ 1,062,515
Projected benefit obligation	813,026	656,574
Accumulated benefit obligation	762,308	620,087
Fair value of plan assets	$ 616,830	$ 512,356
Discount rate	0.85%	1.50%
Rate of compensation increase	2.55%	2.48%

X

- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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