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Retirement Plant - Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Total recognized in other comprehensive (loss) income	$ (42,070)	$ (11,780)	$ 3,520
United States [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net (loss) gain arising during the year	(10,616)	8,879	(3,352)
Net loss	48,239	2,925	2,702
Total recognized in other comprehensive (loss) income	37,623	11,804	(650)
United States [Member] | Retiree Healthcare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	130
Net (loss) gain arising during the year	(670)	13	(594)
Prior service credit	(19)
Total recognized in other comprehensive (loss) income	(559)	13	(594)
Non-U.S. Pension Plans [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	44	(636)
Net (loss) gain arising during the year	4,088	1,609	(3,361)
Prior service credit	(35)	(168)	(192)
Net loss	680	1,191	753
Other Plans	(354)		(360)
Currency impact	583	(2,033)	884
Total recognized in other comprehensive (loss) income	$ 5,006	$ (37)	$ (2,276)

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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The amount of increase or decrease in other comprehensive income attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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