For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Description of Business - Additional Information (Details) - Segment	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Significant Accounting Policies [Line Items]
Number of operating segments			1
Sales Revenue, Net \| Customer Concentration Risk \| Customers Located Outside Of United States
Significant Accounting Policies [Line Items]
Sales revenue percentage	79.00%	68.00%	77.00%	49.00%
Sales Revenue, Net \| Customer Concentration Risk \| Customers Located Outside Of United States \| QIAGEN Manchester Limited
Significant Accounting Policies [Line Items]
Sales revenue percentage	92.00%	85.00%	82.00%	72.00%