Restructuring (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Components of restructuring expenses and reserve
Restructuring charges	$ 4,136	$ 2,023
Accrued restructuring, beginning of period	1,953
Employee severance, benefits and related costs	3,874	2,023
Payments	(2,944)	(70)
Accrued restructuring, end of period	$ 2,883	$ 1,953