Note 4. Revenue - Impact to Condensed Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Net Sales	$ 177,369	$ 160,897	$ 572,500	$ 514,871
Cost of Sales	120,808	110,933	385,077	343,480
Gross Profit	56,561	49,964	187,423	171,391
Selling and Administrative Expenses	47,508	41,454	151,178	134,919
Operating Income	$ 9,053	$ 8,510	$ 36,245	$ 36,472
Operating Income as of Percent of Net Sales		5.30%		7.10%
Calculated under Revenue Guidance in Effect before Topic 606
Net Sales		$ 157,897		$ 501,088
Cost of Sales		110,142		339,808
Gross Profit		47,755		161,280
Selling and Administrative Expenses		39,245		124,808
Operating Income		$ 8,510		$ 36,472
Operating Income as of Percent of Net Sales		5.40%		7.30%
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Net Sales		$ 3,000		$ 13,783
Cost of Sales		791		3,672
Gross Profit		2,209		10,111
Selling and Administrative Expenses		2,209		10,111
Operating Income		$ 0		$ 0