Note 3. Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net Sales	$ 286,156	$ 293,925	$ 307,084	$ 313,385	$ 318,621	$ 313,454	$ 284,149	$ 265,620	$ 1,200,550	$ 1,181,844	$ 1,072,061
Contract Assets	70,350				51,929				70,350	51,929
Customer advance payments	$ 7,145				$ 6,345				$ 7,145	$ 6,345
Transferred over Time
Disaggregation of Revenue [Line Items]
Net Sales									78.00%	70.00%
Automotive
Disaggregation of Revenue [Line Items]
Net Sales									$ 457,400	$ 474,300
Medical
Disaggregation of Revenue [Line Items]
Net Sales									397,800	367,500
Industrial
Disaggregation of Revenue [Line Items]
Net Sales									271,000	255,900
Public Safety
Disaggregation of Revenue [Line Items]
Net Sales									56,200	66,200
Other
Disaggregation of Revenue [Line Items]
Net Sales									$ 18,200	$ 17,900