Income Taxes - Schedule Showing Tax Effects of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets:
Pensions	$ 446,000	$ 144,000
Deferred revenue	2,640,000	3,483,000
Other accruals and reserves	14,638,000	13,949,000
Legal and environmental accruals	7,292,000	10,283,000
Deferred compensation	12,199,000	13,845,000
Bad debt and rebate reserves	4,916,000	3,729,000
Non-U.S. subsidiaries net operating loss carryforwards	6,512,000	3,634,000
Amortization of intangibles	37,123,000	28,311,000
Inventories	8,959,000	10,577,000
Tax credit carryforwards	13,682,000	8,183,000
Deferred Tax Assets, Gross	108,407,000	96,138,000
Deferred Tax Liabilities:
Depreciation	(82,907,000)	(52,130,000)
Unrealized foreign exchange loss	(2,784,000)	(3,603,000)
Other	(2,991,000)	(3,064,000)
Deferred Tax Liabilities, Gross	(88,682,000)	(58,797,000)
Valuation Allowance	(853,000)	(836,000)
Net Deferred Tax Assets	18,872,000	36,505,000
Reconciliation to Consolidated Balance Sheet:
Non-current deferred tax assets (in other non-current assets)	29,245,000	46,684,000
Non-current deferred tax liabilities	$ (10,373,000)	$ (10,179,000)