Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 98,227
Foreign currency translation adjustment	(6,960)
Arlon acquisition	86,337
Ending Balance	177,604
Advanced Connectivity Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance	0
Foreign currency translation adjustment	0
Arlon acquisition	52,444
Ending Balance	52,444
Elastomeric Material Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance	23,565
Foreign currency translation adjustment	(1,301)
Arlon acquisition	33,893
Ending Balance	56,157
Power Electronics Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance	72,438
Foreign currency translation adjustment	(5,659)
Arlon acquisition	0
Ending Balance	66,779
Other [Member]
Goodwill [Roll Forward]
Beginning Balance	2,224
Foreign currency translation adjustment	0
Arlon acquisition	0
Ending Balance	$ 2,224