Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2018 USD ($)
Goodwill [Roll Forward]
December 31, 2017	$ 237,107
Foreign currency translation adjustment	(2,820)
June 30, 2018	234,287
Advanced Connectivity Solutions
Goodwill [Roll Forward]
December 31, 2017	51,693
Foreign currency translation adjustment	0
June 30, 2018	51,693
Elastomeric Material Solutions
Goodwill [Roll Forward]
December 31, 2017	111,575
Foreign currency translation adjustment	(707)
June 30, 2018	110,868
Power Electronics Solutions
Goodwill [Roll Forward]
December 31, 2017	71,615
Foreign currency translation adjustment	(2,113)
June 30, 2018	69,502
Other
Goodwill [Roll Forward]
December 31, 2017	2,224
Foreign currency translation adjustment	0
June 30, 2018	$ 2,224

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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