Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021
Segment Reporting Information [Line Items]
Net sales	$ 980,662	$ 840,937	$ 2,749,217	$ 2,340,031
Operating income for reportable segments	95,843	74,467	248,634	124,353
Assets used in business	2,383,571	2,305,388	2,383,571	2,305,388	$ 2,271,807
Depreciation and amortization of property	5,352	5,080	16,215	15,641
Capital expenditures	4,164	3,728	11,674	12,177
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	658,998	572,892	1,847,087	1,601,866
Operating income for reportable segments	81,640	65,553	213,743	158,108
Assets used in business	1,401,236	1,385,648	1,401,236	1,385,648
Depreciation and amortization of property	4,362	4,230	13,112	12,877
Capital expenditures	3,435	3,150	9,571	10,680
Fluid Power & Flow Control Segment [Member]
Segment Reporting Information [Line Items]
Net sales	321,664	268,045	902,130	738,165
Operating income for reportable segments	40,586	30,829	111,817	83,337
Assets used in business	982,335	919,740	982,335	919,740
Depreciation and amortization of property	990	850	3,103	2,764
Capital expenditures	729	578	2,103	1,497
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 122,226	$ 96,382	$ 325,560	$ 241,445