Business Realignment and Restructuring (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	$ 2,636	$ 1,980
Charge to expense	2,222		$ 2,225
Cash payments	(4,541)		(245)
Restructuring Reserve, Ending Balance	317		1,980
Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	2,222		2,225
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	52	49	656
Charge to expense	7		216
Cash payments	(7)	(725)
Utilization, Non-Cash			(98)
Restructuring Reserve, Ending Balance	52		49
Employee Termination [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	2,636	1,980
Charge to expense	1,118		1,980
Cash payments	(3,437)
Restructuring Reserve, Ending Balance	317		1,980
Employee Termination [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	52	49	520
Charge to expense			(15)
Cash payments		(456)
Restructuring Reserve, Ending Balance	52		49
Accelerated Depreciation [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			98
Utilization, Non-Cash			(98)
Contract Termination [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			17
Charge to expense			16
Cash payments		(33)
Other Restructuring [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	1,104		245
Cash payments	(1,104)		(245)
Other Restructuring [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			119
Charge to expense	7		$ 117
Cash payments	$ (7)	$ (236)