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Subsequent Events - Additional Information (Details) - Subsequent Event - Convertible Promissory Note - QIAGEN North American Holdings, Inc.
$ / shares in Units, $ in Millions
Oct. 26, 2017
USD ($)
$ / shares
Subsequent Event [Line Items]  
Cash proceeds from issuance of subordinated notes | $ $ 3.0
Debt instrument, interest rate 3.00%
Debt instrument, maturity date Oct. 26, 2020
Conversion price per share | $ / shares $ 3.984