Revenue Recognition Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 856,404	$ 864,515
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	742,986	747,423
CANADA
Disaggregation of Revenue [Line Items]
Net sales	65,946	69,107
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	47,472	47,985
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	603,160	604,049
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	492,873	490,774
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	65,946	69,107
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	44,341	44,168
Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	253,244	260,466
Fluid Power & Flow Control Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	250,113	256,649
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	$ 3,131	$ 3,817