Income Taxes - Schedule Showing Tax Effects of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Liabilities:
Depreciation	$ (75,973)	$ (69,975)
Unrealized foreign exchange loss	(631)	(614)
Other	(2,756)	(950)
Deferred Tax Liabilities, Gross	(79,360)	(71,539)
Deferred Tax Assets:
Pensions	12,077	16,698
Deferred revenue	940	1,377
Other accruals and reserves	20,590	17,171
Inventories	1,815	1,833
Legal and environmental accruals	11,503	9,303
Deferred compensation	24,485	17,828
Bad debt and rebate reserves	4,195	3,685
Subsidiaries net operating loss carryforwards	1,201	602
Tax credit carryforwards	1,599	1,120
Deferred Tax Assets, Gross	78,405	69,617
Valuation Allowance	(1,815)	(1,443)
Net Deferred Tax Liabilities	(2,770)	(3,365)
Reconciliation to Consolidated Balance Sheet:
Non-current deferred tax assets (in other non-current assets)	9,727	6,090
Non-current deferred tax liabilities	$ (12,497)	$ (9,455)