Intangible Assets Goodwill Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 342,111	$ 340,743	$ 12,274
Addition due to purchase accounting adjustments	4,972
Addition due to acquisition		332,124
Other, including foreign currency translation	(3,604)	(3,655)
CMH
Goodwill [Line Items]
Goodwill	47,411	47,483	12,274
Addition due to purchase accounting adjustments	0
Addition due to acquisition		35,329
Other, including foreign currency translation	(72)	(120)
EM
Goodwill [Line Items]
Goodwill	294,700	293,260	$ 0
Addition due to purchase accounting adjustments	4,972
Addition due to acquisition		296,795
Other, including foreign currency translation	$ (3,532)	$ (3,535)