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Income Taxes (Deferred Tax Assets And Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Accounts receivable | $ 7,063 | $ 8,312
Inventories | 50,585 | 47,212
Employee benefits | 36,068 | 37,335
Accrued expenses and other | 67,638 | 71,621
Deductible state tax and interest benefit | 3,665 | 2,904
Intangibles | 146,953 | 16,134
Lease liabilities | 86,717 |
Federal, foreign and state net operating losses and credits | 376,375 | 575,625
Gross deferred tax assets | 775,064 | 759,143
Valuation allowance | (232,196) | (347,786)
Net deferred tax assets | 542,868 | 411,357
Inventories | (12,885) | (18,332)
Plant and equipment | (510,952) | (477,734)
Intangibles | (182,424) | (181,436)
Right of use assets | (83,271) |
Other liabilities | (24,220) | (96,134)
Gross deferred tax liabilities | (813,752) | (773,636)
Net deferred tax liability | $ (270,884) | $ (362,279)

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