Segment Reporting - Reconciliation of Segment Information to Consolidated Financial Statements (Detail) - USD ($) $ in Thousands		3 Months Ended													12 Months Ended
		Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Segment Reporting Information [Line Items]
Operating income		$ 28,491		$ 27,966	$ 41,065	$ 29,738	$ 35,451	[1]	$ 27,145	[1]	$ 45,386	[1]	$ 41,283	[1]	$ 127,260	[2]	$ 149,265	[1],[2]	$ 154,840	[2]
Business restructuring	[3]														(2,744)		(2,588)		(3,069)
Interest expense, net		(911)		(1,402)	(1,766)	(1,853)	(2,151)		(2,797)		(2,672)		(3,151)		(5,932)		(10,771)		(11,444)
Other, net															4,571		(725)		3,486
Consolidated income before income taxes		27,886		$ 27,449	$ 39,534	$ 31,030	30,585	[1]	$ 24,694	[1]	$ 43,198	[1]	$ 39,292	[1]	125,899	[2],[4]	137,769	[1],[2],[4]	146,882	[2],[4]
Assets		1,579,367	[5]				1,514,614	[5]							1,579,367	[5]	1,514,614	[5]	1,502,892
Capital expenditures															105,572		86,647		78,613
Depreciation and amortization															78,701		81,115		79,022
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	[4]														208,762		211,552		221,422
Assets		1,331,929					1,285,200								1,331,929		1,285,200		1,311,932
Capital expenditures															103,354		84,398		75,780
Depreciation and amortization															76,056		78,917		77,119
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Unallocated corporate expenses	[6]														(78,758)		(59,699)		(63,513)
Unallocated corporate assets	[4],[7]	$ 247,438					$ 229,414								247,438		229,414		190,960
Unallocated corporate expenditures															2,218		2,249		2,833
Unallocated corporate depreciation expenses															$ 2,645		$ 2,198		$ 1,903

[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] The 2018 and 2017 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.

[3] See Note 23 regarding business restructuring costs.

[4] The 2018 and 2017 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

[5] 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.

[6] 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.

[7] The changes in unallocated corporate assets between 2019, 2018 and 2017 were primarily attributable to changes in the balance of U.S. cash and cash equivalents, which are not allocated to segments.