Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Components of restructuring expenses and reserve
Restructuring charges	$ 622	$ 571
Expected additional restructuring charges	300
Accrued restructuring, beginning of period	2,883	1,953
Employee severance, benefits and related costs	809	571
Payments	(1,599)	(406)
Accrued restructuring, end of period	$ 2,093	$ 2,118