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Document and Entity Information
 12 Months Ended
Dec. 31, 2012
Document and Entity Information  
Entity Registrant Name QIAGEN NV
Entity Central Index Key 0001015820
Current Fiscal Year End Date --12-31
Entity Filer Category Large Accelerated Filer
Document Type 20-F
Document Period End Date Dec. 31, 2012
Document Fiscal Year Focus 2012
Document Fiscal Period Focus FY
Amendment Flag false
Entity Common Stock, Shares Outstanding 234,543,793
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes