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Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions During the years ended December 31, 2017, 2016 and 2015, the Company obtained legal services totaling $0.8 million, $1.3 million and $1.7 million, respectively, of which $0.1 million and $0.0 million was payable as of December 31, 2017 and 2016, respectively, from Polsinelli PC, a law firm for which the spouse of the Company’s Executive Vice President, General Counsel and Secretary is an attorney and shareholder. The Company also obtained and paid legal services totaling $0.5 million during the year ended December 31, 2017 from Segal McCambridge Singer & Mahone, a firm for which the brother in law of the Company's Executive Vice President, General Counsel and Secretary is a partner. The Company obtained support services for compliance with DSCSA requirements totaling $0.5 million during the year ended December 31, 2017 from Domino Amjet, Inc., a company for which the brother of the Company’s Executive Vice President, General Counsel and Secretary is a Vice President of Sales.