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Retirement Plans - Defined Benefit Plan, Projected Benefit Obligation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
United States [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, Beginning balance	$ 168,064	$ 159,416
Service cost	568	450	$ 377
Interest cost	6,491	6,829	6,931
Actuarial losses (gains)	6,415	8,658
Benefits paid	(3,416)	(5,058)
Plan settlements	(177,150)	(2,231)
Projected benefit obligation, Ending balance	972	168,064	159,416
United States [Member] | Retiree Healthcare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, Beginning balance	17,121	14,921
Service cost	566	546	473
Employee contributions	1,159	1,041
Interest cost	636	618	557
Actuarial losses (gains)	(621)	942
Benefits paid	(1,007)	(947)
Plan amendments	(130)
Projected benefit obligation, Ending balance	17,724	17,121	14,921
Non-U.S. Pension Plans [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, Beginning balance	96,378	85,311
Service cost	5,368	5,082	4,954
Employee contributions	622	605
Interest cost	1,707	1,518	1,699
Actuarial losses (gains)	(2,274)	(2,590)
Benefits paid	(3,277)	(2,078)
Plan amendments	(44)	636
Plan settlements	(2,791)	(1,229)
Other plans	1,063	196
Currency impact	(3,030)	8,927
Projected benefit obligation, Ending balance	$ 93,722	$ 96,378	$ 85,311

X

- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change, classified as other.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

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