Note 22. Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Net Sales	$ 164,676	$ 150,038	$ 163,819	$ 156,569	$ 159,061	$ 145,943	$ 151,418	$ 144,446	$ 635,102	$ 600,868	$ 543,817
Gross Profit	53,635	45,819	53,268	51,082	51,079	44,007	46,596	47,183	203,804	188,865	166,725
Restructuring Expense	1,367	2,761	2,014	1,186	1,567	388	3,335	0	7,328	5,290	0
Income (Loss) from Continuing Operations					4,745	4,882	(1)	1,517	21,156	11,143	3,419
Net Income	$ 6,275	$ 2,757	$ 6,502	$ 5,622	$ 4,745	$ 4,882	$ 2,677	$ 7,996	$ 21,156	$ 20,300	$ 33,461
Income (Loss) from Continuing Operations, Per Basic Share									$ 0.56
Income (Loss) from Continuing Operations, Per Diluted Share									0.56
Basic Earnings Per Share:	$ 0.17	$ 0.07	$ 0.17	$ 0.15					0.56
Diluted Earnings Per Share:	$ 0.17	$ 0.07	$ 0.17	$ 0.15					$ 0.56
Class A Common Stock
Income (Loss) from Continuing Operations, Per Basic Share					$ 0.11	$ 0.12	$ (0.02)	$ 0.04		$ 0.25	$ 0.07
Income (Loss) from Continuing Operations, Per Diluted Share					0.11	0.12	(0.02)	0.04		0.25	0.07
Basic Earnings Per Share:					0.11	0.12	0.05	0.20		0.49	0.85
Diluted Earnings Per Share:					0.11	0.12	0.05	0.20		0.49	0.84
Class B Common Stock
Income (Loss) from Continuing Operations, Per Basic Share					0.12	0.13	0.00	0.04		0.29	0.09
Income (Loss) from Continuing Operations, Per Diluted Share					0.12	0.13	0.00	0.04		0.29	0.09
Basic Earnings Per Share:					0.12	0.13	0.07	0.21		0.53	0.88
Diluted Earnings Per Share:					$ 0.12	$ 0.13	$ 0.07	$ 0.21		$ 0.52	$ 0.86