Restructuring and Business Realignment (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	$ 656
Charge to expense	603	3,539
Cash payments	(921)	(1,703)
Utilization, Non-Cash	(286)	(1,180)
Restructuring Reserve, Ending Balance	52	656
Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	12,530
Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense	12,530
Cash payments	(9,894)
Utilization, Non-Cash
Restructuring Reserve, Ending Balance	2,636
Employee Termination [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	520
Charge to expense	(18)	1,939
Cash payments	(453)	(1,419)
Utilization, Non-Cash	3
Restructuring Reserve, Ending Balance	52	520
Employee Termination [Member] | Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense	8,088
Cash payments	(5,452)
Utilization, Non-Cash
Restructuring Reserve, Ending Balance	2,636
Excess and Obsolete Inventory [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense		823
Utilization, Non-Cash		(823)
Restructuring Reserve, Ending Balance
Excess and Obsolete Inventory [Member] | Electronics [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		823
Accelerated Depreciation [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	289
Utilization, Non-Cash	(289)
Contract Termination [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	17
Charge to expense	9	156
Cash payments	(26)	(139)
Restructuring Reserve, Ending Balance		17
Intangible Impairment [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense		200
Utilization, Non-Cash		(200)
Restructuring Reserve, Ending Balance
Fixed Asset Impairment [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense		157
Utilization, Non-Cash		(157)
Restructuring Reserve, Ending Balance
Other Restructuring [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	119
Charge to expense	323	264
Cash payments	(442)	(145)
Restructuring Reserve, Ending Balance		119
Other Restructuring [Member] | Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance
Charge to expense	4,442
Cash payments	(4,442)
Utilization, Non-Cash
Restructuring Reserve, Ending Balance