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Income Taxes (Components Of Net Deferred Income Tax Assets And Net Deferred Income Tax Liabilities) (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Income Taxes [Abstract] |  |  |
Intangibles | $ 40,014,000 | $ 46,293,000 |
Stock options and restricted stock awards | 14,384,000 | 22,010,000 |
Reserves and allowances | 20,022,000 | 18,738,000 |
Net operating loss carryforwards | 29,398,000 | 16,796,000 |
Tax credit carryforwards | 13,571,000 | 8,610,000 |
Accrued liabilities | 5,330,000 | 4,943,000 |
Deferred revenue | 3,502,000 | 405,000 |
Valuation allowance | (109,913,000) | (107,312,000) | $ 0
Total deferred income tax assets | 16,308,000 | 10,483,000 |
Intangibles | 16,968,000 | 22,676,000 |
Property, plant and equipment | 8,818,000 | 3,851,000 |
Total deferred income tax liabilities | 25,786,000 | 26,527,000 |
Net deferred income tax liabilities | $ (9,478,000) | $ (16,044,000) |

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