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Share Repurchase Program (Notes)	12 Months Ended
	Dec. 31, 2012
Equity [Abstract]
Share Repurchase Program	Share Repurchase Program In 2012, the Supervisory Board approved a program authorizing management to purchase up to a total of $100 million of our common shares (excluding transaction costs). Through December 31, 2012, a total of 1.9 million QIAGEN shares were repurchased for approximately $35.7 million, in total. We intend to complete the share repurchase program in 2013. The cost of repurchased shares is included in treasury stock and reported as a reduction in total equity when a repurchase occurs. Repurchased shares will be held in treasury in order to satisfy various obligations, which include exchangeable debt instruments and employee share-based remuneration plans.

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The entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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