Commitments and Contingencies Commitments and Contigenties Details (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 4,100,000	$ 3,700,000	$ 2,800,000
Letters of Credit Outstanding, Amount	88,000
Irish Grants Related to Reasearch and Development, Training and Hiring	261,000	40,000	177,000
Deferred Credits and Other Liabilities	2,000,000	1,800,000
Irish Grants Related to Purchased Property Plant and Equipment	106,000	111,000	120,000
Refundable Irish Grants if Operations Cease	$ 500,000
FDA Warning Letter Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range Of Possible Revenue Loss, Maximum, Percent	1.00%