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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Income Taxes [Abstract] |  |
Carrying value of inventories | $ 5,882 | $ 2,786
Accrued liabilities and allowances deductible for tax purposes on a cash basis | 5,742 | 8,956
Goodwill | 13,346 | 10,526
Stock-based compensation | 7,169 | 8,251
Net operating loss carryforwards | 40,915 | 39,670
Tax credit carryforwards | 5,970 | 5,848
Other | 7,394 | 7,564
Gross deferred tax assets | 86,418 | 83,601
Less: valuation allowance | (30,312) | (41,858)
Net deferred tax assets | 56,106 | 41,743
Plant and equipment, due to differences in depreciation | (5,063) | (3,887)
Other | (7,956) | (1,188)
Gross deferred tax liability | (13,019) | (5,075)
Net deferred tax assets | 43,087 | 36,668
Current deferred tax assets | 11,302 | 8,889
Non-current deferred tax assets | 33,856 | 29,535
Non-current deferred tax liabilities | $ (2,071) | $ (1,756)

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