Supplemental Financial Information (Allocation of Restructuring and Impairment Charges to Operating Segments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	$ 12,987	$ 2,485	$ 4,038
Allocated restructuring charges | Advanced Connectivity Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	4,288	0	244
Allocated restructuring charges | Elastomeric Material Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	401	948	2,152
Allocated restructuring charges | Power Electronics Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	7,659	0	136
Allocated impairment charges | Advanced Connectivity Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	335	1,537	1,506
Allocated impairment charges | Elastomeric Material Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	52	0	0
Allocated impairment charges | Power Electronics Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges	$ 252	$ 0	$ 0