Restructuring (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 751	$ 0	$ 0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance and benefits expense	$ 800