Note 16. Geographic Information - Segments, Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 241,268	$ 232,930	$ 230,265	$ 226,451	$ 220,402	$ 214,111	$ 207,129	$ 200,418	$ 930,914	$ 842,060	$ 819,350
Long-Lived Assets:	142,061				125,194				142,061	125,194	111,149
United States
Revenues from External Customers and Long-Lived Assets
Net Sales									403,830	383,678	396,516
Long-Lived Assets:	67,817				53,596				67,817	53,596	49,689
MEXICO
Revenues from External Customers and Long-Lived Assets
Net Sales									94,726	76,499	81,117
Poland
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets:	32,315				34,588				32,315	34,588	33,692
CHINA
Revenues from External Customers and Long-Lived Assets
Net Sales									152,817	150,080	127,761
Long-Lived Assets:	17,106				15,922				17,106	15,922	16,676
ROMANIA
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets:	16,468				12,249				16,468	12,249	1,710
Other Foreign
Revenues from External Customers and Long-Lived Assets
Net Sales									279,541	231,803	213,956
Long-Lived Assets:	$ 8,355				$ 8,839				$ 8,355	$ 8,839	$ 9,382