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Income Taxes - Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Tax effect of temporary differences related to: |  |
Inventories | $ 500 | $ 500
Accrued OPEB costs | 1,000 | 1,100
Accrued pension costs | 4,200 | 4,600
Accrued employee benefits | 1,900 | 2,000
Accrued environmental liabilities | 41,100 | 39,900
Other accrued liabilities and deductible differences | 200 | 400
Tax loss and tax credit carryforwards |  | 500
Adjusted gross deferred tax assets (liabilities) | 48,900 | 49,000
Netting of items by tax jurisdiction | (48,900) | (49,000)
Marketable securities | (17,000) | (6,400)
Property and equipment | (4,400) | (4,500)
Goodwill | (2,600) | (2,600)
Other taxable differences | (3,300) | (4,300)
Investment in Kronos Worldwide, Inc. | (49,000) | (56,200)
Adjusted gross deferred tax assets (liabilities) | (76,300) | (74,000)
Netting of items by tax jurisdiction | 48,900 | 49,000
Net noncurrent deferred tax asset (liability) | $ (27,445) | $ (25,035)

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