Revenue Recognition Revenue Recognition (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Net sales	$ 840,038	$ 667,187	$ 1,704,553	$ 1,347,888
Cost of sales	597,178	478,827	1,209,840	967,104
Gross profit	242,860	188,360	494,713	380,784
Selling, distribution and administrative expense, including depreciation	181,895	141,645	367,409	282,232
Operating income	60,965	46,715	127,304	98,552
Interest expense, net	9,578	2,139	20,054	4,305
Other expense, net	946	(20)	707	(731)
Income before income taxes	50,441	44,596	106,543	94,978
Income tax expense	11,724	13,646	18,888	30,307
Net income	38,717	$ 30,950	87,655	$ 64,671
Other current assets	44,041		44,041		$ 32,990
Inventories	445,881		445,881		422,069
Other assets	21,901		21,901		23,788
Other current liabilities	60,164		60,164		83,112
Compensation and related benefits	56,882		56,882		73,370
Other liabilities	73,675		73,675		$ 81,720
Retained Earnings	889,915		889,915
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	841,043		1,708,870
Cost of sales	597,877		1,212,943
Gross profit	243,166		495,927
Selling, distribution and administrative expense, including depreciation	181,950		367,683
Operating income	61,216		128,244
Interest expense, net	9,578		20,054
Other expense, net	946		707
Income before income taxes	50,692		107,483
Income tax expense	11,788		19,124
Net income	38,904		88,359
Other current assets	34,717		34,717
Inventories	457,711		457,711
Other assets	22,093		22,093
Other current liabilities	66,790		66,790
Compensation and related benefits	56,426		56,426
Other liabilities	72,928		72,928
Retained Earnings	887,190		887,190
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	1,005		4,317
Cost of sales	699		3,103
Gross profit	306		1,214
Selling, distribution and administrative expense, including depreciation	55		274
Operating income	251		940
Interest expense, net	0		0
Other expense, net	0		0
Income before income taxes	251		940
Income tax expense	64		236
Net income	187		704
Other current assets	(9,324)		(9,324)
Inventories	11,830		11,830
Other assets	192		192
Other current liabilities	6,626		6,626
Compensation and related benefits	(456)		(456)
Other liabilities	(747)		(747)
Retained Earnings	$ (2,725)		$ (2,725)