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Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In 2018 and 2017, the Company obtained legal services 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. During the three month periods ended June 30, 2018 and 2017, the Company obtained legal services totaling $1.1 million and $0.2 million, respectively. During the six months period ending, June 30, 2018 and 2017, the Company obtained legal services totaling $1.7 million and $0.6 million, of which $1.1 million and $0.3 million was payable as of June 30, 2018 and 2017, respectively. During the three month periods ended June 30, 2018 and 2017, the Company also obtained and paid legal services totaling $0.2 million and $0.1 million, respectively, to Segal McCambridge Singer & Mahoney, a firm for which the brother in law of the Company's Executive Vice President, General Counsel and Secretary is a partner, and during the six months period ending, June 30, 2018 and 2017, the Company obtained and paid legal services totaling $0.4 million and $0.3 million to the same firm.