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Note 15. Geographic Area Information - Segments, Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 201,126	$ 206,858	$ 207,563	$ 203,803	$ 198,949	$ 185,680	$ 181,264	$ 175,637	$ 819,350	$ 741,530	$ 703,129
Long-Lived Assets:	111,149				99,578				111,149	99,578	93,859
United States
Revenues from External Customers and Long-Lived Assets
Net Sales									396,516	363,211	389,510
Long-Lived Assets:	49,689				33,004				49,689	33,004	28,942
GERMANY
Revenues from External Customers and Long-Lived Assets
Net Sales									73,966	77,338	68,925
Poland
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets:	33,692				45,287				33,692	45,287	45,971
CHINA
Revenues from External Customers and Long-Lived Assets
Net Sales									127,761	67,665	46,794
Long-Lived Assets:	16,676				12,174				16,676	12,174	10,069
Other Foreign
Revenues from External Customers and Long-Lived Assets
Net Sales									221,107	233,316	197,900
Long-Lived Assets:	$ 11,092				$ 9,113				$ 11,092	$ 9,113	$ 8,877