Restructuring - Summary of Restructuring Liability (Details) - USD ($) $ in Thousands	3 Months Ended	25 Months Ended
	Mar. 31, 2017	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Balance - Beginning of the period	$ 2,274
Provision	748	$ 6,000
Utilization	(568)
Balance - End of the period	2,454
Employee Costs
Restructuring Reserve [Roll Forward]
Balance - Beginning of the period	2,229
Provision	607
Utilization	(440)
Balance - End of the period	2,396
Facility Exit and Other Costs
Restructuring Reserve [Roll Forward]
Balance - Beginning of the period	45
Provision	141
Utilization	(128)
Balance - End of the period	$ 58