Revenue Recognition Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 747,807	$ 856,404
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	644,057	742,986
CANADA
Disaggregation of Revenue [Line Items]
Net sales	56,896	65,946
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,854	47,472
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	513,284	603,160
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	415,242	492,873
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	56,896	65,946
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	41,146	44,341
Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	234,523	253,244
Fluid Power & Flow Control Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	228,815	250,113
Fluid Power & Flow Control Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	0	0
Fluid Power & Flow Control Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 5,708	$ 3,131