Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Details) $ in Thousands	9 Months Ended
Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
December 31, 2016	$ 208,431
Foreign currency translation adjustment	8,247
Purchase accounting adjustment	116
DSP acquisition	17,793
September 30, 2017	234,587
Advanced Connectivity Solutions
Goodwill [Roll Forward]
December 31, 2016	51,693
Foreign currency translation adjustment	0
Purchase accounting adjustment	0
DSP acquisition	0
September 30, 2017	51,693
Elastomeric Material Solutions
Goodwill [Roll Forward]
December 31, 2016	91,531
Foreign currency translation adjustment	768
Purchase accounting adjustment	116
DSP acquisition	17,793
September 30, 2017	110,208
Power Electronics Solutions
Goodwill [Roll Forward]
December 31, 2016	62,983
Foreign currency translation adjustment	7,479
Purchase accounting adjustment	0
DSP acquisition	0
September 30, 2017	70,462
Other
Goodwill [Roll Forward]
December 31, 2016	2,224
Foreign currency translation adjustment	0
Purchase accounting adjustment	0
DSP acquisition	0
September 30, 2017	$ 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-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

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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.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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