Segment Reporting - Reconciliation of Segment Information to Consolidated Financial Statements (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating income		$ 39,385	$ 27,694	$ 44,685	$ 39,655	$ 31,398	$ 30,434	$ 39,133	$ 46,230	$ 151,419	[1]	$ 147,195	[1]	$ 127,830	[1]
Business restructuring and asset impairments										(2,588)		(3,069)		(7,064)
Interest expense, net		(2,151)	(2,797)	(2,672)	(3,151)	(2,826)	(2,763)	(2,863)	(2,992)	(10,771)		(11,444)		(13,205)
Other, net	[1]									(725)		3,486		(809)
Consolidated income before income taxes		34,519	$ 25,243	$ 42,497	$ 37,664	28,532	$ 29,312	$ 37,063	$ 44,330	139,923		139,237		113,816
Assets		1,484,666				1,470,861				1,484,666		1,470,861		1,353,890
Capital expenditures										86,647		78,613		103,076
Depreciation and amortization										81,115		79,022		74,967
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	[1]									213,706		213,777		208,919
Assets		1,285,200				1,311,932				1,285,200		1,311,932		1,208,697
Capital expenditures										84,398		75,780		100,205
Depreciation and amortization										78,917		77,119		73,122
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Business restructuring and asset impairments	[2]									(2,588)		(3,069)		(7,064)
Unallocated corporate expenses	[3]									(59,699)		(63,513)		(74,025)
Unallocated corporate assets	[4]	$ 199,466				$ 158,929				199,466		158,929		145,193
Unallocated corporate expenditures										2,249		2,833		2,871
Unallocated corporate depreciation expenses										$ 2,198		$ 1,903		$ 1,845

[1] The 2017 and 2016 amounts for the noted line items have been immaterially changed from the amounts originally reported as a result of the Company’s first quarter 2018 adoption of ASU No. 2017-7, Compensation –Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.

[2] See Note 22 regarding business restructuring and asset impairment costs.

[3] Unallocated corporate expenses primarily comprise corporate administrative expenses (e.g., corporate finance, legal, human resources, information systems, deferred compensation and environmental remediation) that are not included in segment operating income and not used to evaluate segment performance.

[4] The changes in unallocated corporate assets between 2018, 2017 and 2016 were primarily attributable to changes in the balance of U.S. cash and cash equivalents, which are not allocated to segments.