Income Taxes (Summary Of Income Tax Expense At Federal Statutory Corporate Rate) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Tax expense (benefit) at statutory rate of 35%	$ 11,097	$ 4,975	$ (3,555)
State income taxes, net of federal benefit	471	162	(239)
Income tax reconciliation foreign income tax rate differential	(2,910)	(1,866)	(1,977)
Research and development credit	(418)	(518)	(123)
Change in valuation allowance	612	545	2,486
IRS settlement			2,628
Equity based compensation	(91)	479	828
Tax expense related to uncertain tax positions		(380)	265
Tax exempt interest income			(39)
Manufacturing credit	(474)	(167)
Other	41	(83)	150
Income tax expense	$ 8,328	$ 3,147	$ 424

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the deduction for qualified production activities received under enacted tax laws.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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