Note 17. Geographic Information - Segments, Geographic Areas (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
Revenues from External Customers and Long-Lived Assets
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
Long-Lived Assets:	158,730				148,520				158,730	148,520	141,540
United States
Revenues from External Customers and Long-Lived Assets
Net Sales									346,376	321,805	224,834
Long-Lived Assets:	48,190				43,887				48,190	43,887	39,465
MEXICO
Revenues from External Customers and Long-Lived Assets
Net Sales									232,135	282,400	256,537
Long-Lived Assets:	36,548				31,238				36,548	31,238	30,733
Poland
Revenues from External Customers and Long-Lived Assets
Net Sales									244,107	251,635	282,847
Long-Lived Assets:	32,670				29,736				32,670	29,736	33,629
CHINA
Revenues from External Customers and Long-Lived Assets
Net Sales									159,746	146,332	177,930
Long-Lived Assets:	10,405				12,138				10,405	12,138	14,546
THAILAND
Revenues from External Customers and Long-Lived Assets
Net Sales									124,415	113,276	87,513
ROMANIA
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets:	17,707				19,546				17,707	19,546	19,394
Other Foreign
Revenues from External Customers and Long-Lived Assets
Net Sales									93,771	66,396	42,400
Long-Lived Assets:	$ 13,210				$ 11,975				$ 13,210	$ 11,975	$ 3,773