Goodwill and Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2019	Jun. 30, 2018
Changes in the carrying amount of goodwill by reportable segment
Balance at beginning of period	$ 646,643	$ 206,135
Goodwill acquired/adjusted during the period	14,663	441,689
Other, primarily currency translation	(111)	(1,181)
Balance at March 31, 2019	661,195	646,643
Service Center Based Distribution Segment [Member]
Changes in the carrying amount of goodwill by reportable segment
Balance at beginning of period	203,084	201,740
Goodwill acquired/adjusted during the period	9,872	2,525
Other, primarily currency translation	(111)	(1,181)
Balance at March 31, 2019	212,845	203,084
Fluid Power Businesses Segment [Member]
Changes in the carrying amount of goodwill by reportable segment
Balance at beginning of period	443,559	4,395
Goodwill acquired/adjusted during the period	4,791	439,164
Other, primarily currency translation	0	0
Balance at March 31, 2019	$ 448,350	$ 443,559