Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Pension and other postretirement liabilities	$ 22,632	$ 18,653
Rationalization and other accrued liabilities	23,038	19,343
AMT and other credit carryforwards	3,802	3,701
Net operating loss carryforwards	34,792	31,679
Other intangible assets	5,251	3,964
Foreign currency translation	246	234
Inventory and related reserves	26,677	6,988
Long term operating lease liabilities	48,889	0
Other	5,265	5,971
Total deferred tax assets	170,592	90,533
Deferred tax liabilities:
Property, plant and equipment	(195,039)	(185,101)
Pension and other postretirement liabilities	(25,016)	(14,393)
Other intangible assets	(112,680)	(117,168)
Operating lease right of use assets	(46,709)
Other	(6,258)	(7,275)
Total deferred tax liabilities	(385,702)	(323,937)
Valuation allowance	(15,025)	(13,541)
Net deferred tax liabilities	$ (230,135)	$ (246,945)