Acquisitions and Exit Activities Exit Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 266	$ 836	$ 1,430
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 400