Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Segment Reporting Information [Line Items]
Net sales	$ 876,874	$ 751,287	$ 1,768,555	$ 1,499,094
Operating income for reportable segments	78,177	(2,422)	152,791	49,886
Assets used in business	2,225,709	2,241,017	2,225,709	2,241,017	$ 2,271,807
Depreciation and amortization of property	5,436	5,209	10,863	10,561
Capital expenditures	3,889	4,852	7,510	8,449
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	587,218	515,690	1,188,089	1,028,974
Operating income for reportable segments	67,450	42,654	132,103	92,555
Assets used in business	1,265,567	1,257,457	1,265,567	1,257,457
Depreciation and amortization of property	4,371	4,252	8,750	8,647
Capital expenditures	3,039	4,442	6,136	7,530
Fluid Power & Flow Control Segment [Member]
Segment Reporting Information [Line Items]
Net sales	289,656	235,597	580,466	470,120
Operating income for reportable segments	36,426	26,647	71,231	52,508
Assets used in business	960,142	983,560	960,142	983,560
Depreciation and amortization of property	1,065	957	2,113	1,914
Capital expenditures	850	410	1,374	919
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 103,876	$ 69,301	$ 203,334	$ 145,063