Restructuring - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) employee
Arizona
Restructuring Cost and Reserve [Line Items]
Number of employees | employee	70
Restructuring charges	$ 700
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	193
Expected cost to be paid	$ 1,200