Revenue Recognition Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 876,874	$ 751,287	$ 1,768,555	$ 1,499,094
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	756,767	647,814	1,520,975	1,291,871
CANADA
Disaggregation of Revenue [Line Items]
Net sales	66,263	57,809	140,829	114,705
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	53,844	45,664	106,751	92,518
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	587,218	515,690	1,188,089	1,028,974
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	474,412	417,456	953,576	832,698
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	66,263	57,809	140,829	114,705
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,543	40,425	93,684	81,571
Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	289,656	235,597	580,466	470,120
Fluid Power & Flow Control Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	282,355	230,358	567,399	459,173
Fluid Power & Flow Control Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Fluid Power & Flow Control Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 7,301	$ 5,239	$ 13,067	$ 10,947