Note 4. Revenue - Impact to Condensed Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net Sales	$ 201,008	$ 178,614	$ 395,131	$ 353,974
Cost of Sales	136,019	121,194	264,269	232,547
Gross Profit	64,989	57,420	130,862	121,427
Selling and Administrative Expenses	51,491	45,415	103,670	93,465
Operating Income	$ 13,498	$ 12,005	$ 27,192	$ 27,962
Operating Income as of Percent of Net Sales		6.70%		7.90%
Calculated under Revenue Guidance in Effect before Topic 606
Net Sales		$ 173,674		$ 343,191
Cost of Sales		119,738		229,666
Gross Profit		53,936		113,525
Selling and Administrative Expenses		41,931		85,563
Operating Income		$ 12,005		$ 27,962
Operating Income as of Percent of Net Sales		6.90%		8.10%
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Net Sales		$ 4,940		$ 10,783
Cost of Sales		1,456		2,881
Gross Profit		3,484		7,902
Selling and Administrative Expenses		3,484		7,902
Operating Income		$ 0		$ 0