Revenue Recognition Revenue Recognition (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Net Sales	$ 864,515	$ 680,701
UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	747,423	567,545
CANADA
Disaggregation of Revenue [Line Items]
Net Sales	69,107	66,817
Other countries
Disaggregation of Revenue [Line Items]
Net Sales	47,985	46,339
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	604,049	568,913
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	490,774	458,996
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net Sales	69,107	66,817
Service Center Based Distribution Segment [Member] | Other countries
Disaggregation of Revenue [Line Items]
Net Sales	44,168	43,100
Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	260,466	111,788
Fluid Power & Flow Control Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	256,649	108,549
Fluid Power & Flow Control Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net Sales	0	0
Fluid Power & Flow Control Segment [Member] | Other countries
Disaggregation of Revenue [Line Items]
Net Sales	$ 3,817	$ 3,239