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Restructuring and Severance	12 Months Ended
Restructuring and Severance	Dec. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring and Severance	Restructuring and Severance During the year ended December 31, 2016, the Company incurred $3.9 million in severance costs related to staff reductions, primarily in business support areas, and $0.4 million in costs related to future lease obligations and leasehold improvement write-offs for vacated office space. Total unpaid severance and related charges as of December 31, 2016 was $2.4 million.