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Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Pension and other postretirement costs | $ 3,600 | $ 4,295
Inventories | 2,103 | 1,800
Net operating/capital loss carryforwards | 9,536 | 9,523
Tax credit carryforwards | 748 | 0
Deferred compensation | 2,009 | 2,142
Other accruals and reserves | 3,547 | 3,192
Book over tax depreciation | 12 | 0
Total gross deferred tax assets | 21,555 | 20,952
Less: valuation allowance | (14,455) | (12,434)
Deferred tax assets, net of valuation allowance | 7,100 | 8,518
Deferred tax liabilities: |  |
Tax over book depreciation | 0 | (125)
Investment in subsidiary | (1,983) | (2,214)
Intangible assets, including tax deductible goodwill | (884) | (713)
Total gross deferred tax liabilities | (2,867) | (3,052)
Net deferred tax assets | $ 4,233 | $ 5,466

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