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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)

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