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Restructuring and Severance	9 Months Ended
Restructuring and Severance	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Severance	Restructuring and Severance During the three months ended September 30, 2017, the Company incurred $0.5 million in severance costs related to staff reductions in connection with the Acquisition and the Company's outsourcing activities and $1.0 million in restructuring costs related to future lease obligations and leasehold improvement write-offs for vacated office space. During the nine months ended September 30, 2017, the Company incurred $9.4 million in severance costs related to staff reductions in connection with the Acquisition and the Company's outsourcing activities and $1.0 million in restructuring costs related to future lease obligations and leasehold improvement write-offs for vacated office space. Total unpaid severance and related charges as of September 30, 2017 was $6.8 million, which the Company expects to pay over the next three years. The Company expects to incur additional severance costs in connection with the Acquisition of approximately $0.3 million related to one-time termination benefits that are being earned over a transition period.