Revenue Recognition Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Net Sales	$ 864,515	$ 680,701
Cost of Sales	612,662	488,277
Gross Profit	251,853	192,424
Selling, Distribution and Administrative, including depreciation	185,514	140,587
Operating Income	66,339	51,837
Interest Expense, net	10,476	2,166
Other Income, net	(239)	(711)
Income before income taxes	56,102	50,382
Income Tax Expense	7,164	16,661
Net Income	48,938	$ 33,721
Accounts receivable, net	565,462		$ 548,811
Inventories	431,658		422,069
Other assets	23,494		23,788
Other current liabilities	70,109		83,112
Compensation and related benefits	62,995		73,370
Other liabilities	78,281		81,720
Retained Earnings	1,181,683		$ 1,129,678
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net Sales	867,827
Cost of Sales	615,066
Gross Profit	252,761
Selling, Distribution and Administrative, including depreciation	185,733
Operating Income	67,028
Interest Expense, net	10,476
Other Income, net	(239)
Income before income taxes	56,791
Income Tax Expense	7,336
Net Income	49,455
Accounts receivable, net	555,069
Inventories	444,187
Other assets	23,667
Other current liabilities	76,668
Compensation and related benefits	62,484
Other liabilities	77,454
Retained Earnings	1,178,771
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net Sales	3,312
Cost of Sales	2,404
Gross Profit	908
Selling, Distribution and Administrative, including depreciation	219
Operating Income	689
Interest Expense, net	0
Other Income, net	0
Income before income taxes	689
Income Tax Expense	172
Net Income	517
Accounts receivable, net	(10,393)
Inventories	12,529
Other assets	173
Other current liabilities	6,559
Compensation and related benefits	(511)
Other liabilities	(827)
Retained Earnings	$ (2,912)