Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Carrying value of inventories	$ 4,391	$ 4,772
Accrued liabilities and allowances deductible for tax purposes on a cash basis	6,052	5,620
Goodwill	8,035	8,433
Stock-based compensation	6,723	6,583
Net operating loss carryforwards	35,879	40,217
Tax credit carryforwards	8,121	7,148
Other	9,009	8,977
Gross deferred tax assets	78,210	81,750
Less: valuation allowance	(17,202)	(36,682)
Net deferred tax assets	61,008	45,068
Plant and equipment, due to differences in depreciation	(6,138)	(5,402)
Intangible assets, due to differences in amortization	(39,060)	(6,102)
Other	(1,722)	(2,151)
Gross deferred tax liability	(46,920)	(13,655)
Net deferred tax assets	14,088	31,413
Current deferred tax assets		0
Non-current deferred tax assets	$ 14,088	31,413
Non-current deferred tax liabilities		$ 0