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Derivatives and Hedging (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Aggregate notional value of foreign exchange forward and swap arrangements	$ 574.5	$ 204.0
Fair values included in other assets	0.8	5.5
Fair values included in other liabilities	12.9	0.8
QIAGEN Euro Finance [Member]
Derivative [Line Items]
Cash-flow hedges notional amount		120.0
Cash Flow Hedge Derivative Instrument Assets at Fair Value		0.7
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value		$ 1.7

X

- Definition

Fair value of all asset derivatives designated as cash flow hedging instruments.

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-Publisher FASB

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Fair value of all liability derivatives designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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