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Income Taxes - Schedule Showing Tax Effects of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Deferred Tax Liabilities: |  |
Depreciation | $ (62,986) | $ (59,574)
Unrealized foreign exchange loss | (2,444) | (1,479)
Amortization of intangibles | (842) | (835)
Inventories | (2,504) | (5,855)
Other | (386) | (307)
Deferred Tax Liabilities, Gross | (69,162) | (68,050)
Deferred Tax Assets: |  |
Pensions | 4,935 | 5,855
Deferred revenue | 3,073 | 161
Other accruals and reserves | 14,960 | 12,171
Legal and environmental accruals | 7,055 | 7,758
Deferred compensation | 16,222 | 15,816
Bad debt and rebate reserves | 2,821 | 2,604
Non-U.S. subsidiaries net operating loss carryforwards | 2,495 | 3,966
Tax credit carryforwards | 4,713 | 5,200
Deferred Tax Assets, Gross | 56,274 | 53,531
Valuation Allowance | (896) | (2,994)
Net Deferred Tax Liabilities | (13,784) | (17,513)
Reconciliation to Consolidated Balance Sheet: |  |
Non-current deferred tax assets (in other non-current assets) | 6,961 | 5,878
Non-current deferred tax liabilities | $ (20,745) | $ (23,391)

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