Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]			$ 807,425
Other comprehensive income before reclassifications		$ 4,317	$ (35,012)	8,004	$ (26,227)
Amounts reclassified from AOCI		540	750	1,081	1,500
Remeasurement adjustment related to the Tax Act	[2]			(5,325)
Net current-period other comprehensive income		4,857	(34,262)	3,760	(24,727)
Ending Balance	[1]	857,658		857,658
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(104,794)	(61,776)	(108,481)	(70,561)
Other comprehensive income before reclassifications		4,317	(35,012)	8,004	(26,227)
Net current-period other comprehensive income		4,317	(35,012)	8,004	(26,227)
Ending Balance		(100,477)	(96,788)	(100,477)	(96,788)
Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(37,865)	(28,340)	(33,083)	(29,093)
Amounts reclassified from AOCI		542	752	1,085	1,505
Remeasurement adjustment related to the Tax Act	[2]			(5,325)
Net current-period other comprehensive income		542	752	(4,240)	1,505
Ending Balance		(37,323)	(27,588)	(37,323)	(27,588)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		79	88	81	91
Amounts reclassified from AOCI		(2)	(2)	(4)	(5)
Net current-period other comprehensive income		(2)	(2)	(4)	(5)
Ending Balance		77	86	77	86
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(142,580)	(90,028)	(141,483)	(99,563)
Net current-period other comprehensive income		4,857
Ending Balance		$ (137,723)	$ (124,290)	$ (137,723)	$ (124,290)

[1] The 2018 amounts for the noted line items have been retrospectively changed from the amounts originally reported as a result of the Company’s first quarter 2019 change in method of accounting for U.S. inventory valuation from LIFO to FIFO.

[2] ^{Represents reclassification of the stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act (Tax Act) from accumulated other comprehensive income (loss) to retained earnings in accordance with ASU 2018-02. See Note 19 for more details.}