Business Segment and Geographic Information (Information About Reportable Segments) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales	[1]	$ 641,443	$ 610,911	$ 537,482
Operating income		76,255	81,241	50,117
Total assets		932,458	840,435	811,321
Capital expenditures		24,837	28,755	16,859
Depreciation & amortization		34,054	26,268	26,351
Investment in unconsolidated joint ventures		15,348	17,214	18,463
Equity income in unconsolidated joint ventures		2,890	4,123	4,326
Operating Segments | Elastomeric Material Solutions
Segment Reporting Information [Line Items]
Net sales		180,898	173,671	168,082
Operating income		19,979	23,350	22,601
Total assets		265,575	221,013	223,346
Capital expenditures		4,103	6,197	3,030
Depreciation & amortization		9,280	6,561	6,410
Investment in unconsolidated joint ventures		15,348	17,214	18,463
Equity income in unconsolidated joint ventures		2,890	4,123	4,326
Operating Segments | Advanced Connectivity Solutions
Segment Reporting Information [Line Items]
Net sales		267,630	240,864	184,949
Operating income		45,115	44,007	19,076
Total assets		316,235	217,173	179,363
Capital expenditures		15,532	14,290	7,793
Depreciation & amortization		15,403	9,575	7,004
Operating Segments | Power Electronics Solutions
Segment Reporting Information [Line Items]
Net sales		150,288	171,832	160,730
Operating income		3,750	5,654	1,338
Total assets		321,248	377,181	384,249
Capital expenditures		4,185	7,489	5,287
Depreciation & amortization		7,855	9,332	12,406
Investment in unconsolidated joint ventures		0	0	0
Equity income in unconsolidated joint ventures		0	0	0
Operating Segments | Other
Segment Reporting Information [Line Items]
Net sales		42,627	24,544	23,721
Operating income		7,411	8,230	7,102
Total assets		29,400	25,068	24,363
Capital expenditures		1,017	779	749
Depreciation & amortization		$ 1,516	$ 800	$ 531

[1] Net sales are allocated to countries based on the location of the customer.