Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 262,930
Foreign currency translation adjustment	7,242
Ending balance	270,172
Advanced Connectivity Solutions
Goodwill [Roll Forward]
Beginning balance	51,694
Foreign currency translation adjustment	0
Ending balance	51,694
Elastomeric Material Solutions
Goodwill [Roll Forward]
Beginning balance	142,030
Foreign currency translation adjustment	991
Ending balance	143,021
Power Electronics Solutions
Goodwill [Roll Forward]
Beginning balance	66,982
Foreign currency translation adjustment	6,251
Ending balance	73,233
Other
Goodwill [Roll Forward]
Beginning balance	2,224
Foreign currency translation adjustment	0
Ending balance	$ 2,224