Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
Goodwill [Roll Forward]
December 31, 2015	$ 175,453
Arlon adjustment	(238)
DeWAL acquisition	35,638
Foreign currency translation adjustment	(2,422)
December 31, 2016	208,431
Elastomeric Material Solutions
Goodwill [Roll Forward]
December 31, 2015	56,269
Arlon adjustment	0
DeWAL acquisition	35,638
Foreign currency translation adjustment	(376)
December 31, 2016	91,531
Advanced Connectivity Solutions
Goodwill [Roll Forward]
December 31, 2015	51,931
Arlon adjustment	(238)
DeWAL acquisition	0
Foreign currency translation adjustment	0
December 31, 2016	51,693
Power Electronics Solutions
Goodwill [Roll Forward]
December 31, 2015	65,029
Arlon adjustment	0
DeWAL acquisition	0
Foreign currency translation adjustment	(2,046)
Other
Goodwill [Roll Forward]
December 31, 2015	2,224
Arlon adjustment	0
DeWAL acquisition	0
Foreign currency translation adjustment	$ 0

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=64834752&loc=SL49117168-202975

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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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=73531572&loc=d3e961-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-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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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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