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Income Taxes (Schedule Of Deferred Tax Assets And Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Deferred tax assets: |  |  |
Postretirement and other employee benefits | $ 18,395 | $ 19,392 |
Foreign tax credit and other carryforwards | 111,325 | 175,229 |
Capitalized research and experimental costs | 7,695 | 9,417 |
Environmental reserves | 976 | 493 |
Inventory | 14,251 | 7,933 |
Original issue discount | 0 | 2,603 |
Long-term contract option amortization | 1,144 | 1,204 |
Provision for rationalization charges | 351 | 502 |
Other | 4,270 | 1,536 |
Total gross deferred tax assets | 158,407 | 218,309 |
Less: valuation allowance | (58,446) | (150,839) |
Total deferred tax assets | 99,961 | 67,470 | $ 6,500
Deferred tax liabilities: |  |  |
Fixed assets | 59,521 | 68,098 |
Debt discount amortization / Deferred financing fees | 0 | 3,191 |
Inventory | 7,751 | 5,128 |
Goodwill and acquired intangibles | 3,668 | 0 |
Other | 3,138 | 2,031 |
Total deferred tax liabilities | 74,078 | 78,448 |
Total deferred tax liabilities | $ 25,883 | $ 10,978 |

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