Revenue Recognition Revenue Recognition (Details 3)	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
General Industry [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	37.50%	38.20%
General Industry [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	35.80%	35.90%
General Industry [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	41.70%	44.00%
Industrial Machinery [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	14.20%	13.30%
Industrial Machinery [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	10.20%	9.70%
Industrial Machinery [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	24.20%	22.00%
Metals [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	11.00%	11.10%
Metals [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	12.00%	12.20%
Metals [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	8.60%	8.30%
Food [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	8.20%	8.10%
Food [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	10.50%	10.40%
Food [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	2.50%	2.50%
Oil & Gas [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	7.90%	7.70%
Oil & Gas [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	10.10%	10.00%
Oil & Gas [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	2.30%	2.20%
Chem/Petrochem [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	5.70%	6.30%
Chem/Petrochem [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	2.80%	3.10%
Chem/Petrochem [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	12.80%	14.10%
Forest Products [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	6.00%	6.30%
Forest Products [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	7.00%	7.60%
Forest Products [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	3.60%	3.00%
Cement & Aggregate [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	5.20%	4.90%
Cement & Aggregate [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	6.90%	6.50%
Cement & Aggregate [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	1.00%	1.00%
Transportation [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	4.30%	4.10%
Transportation [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	4.70%	4.60%
Transportation [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	3.30%	2.90%
Total
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	100.00%	100.00%
Total | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	100.00%	100.00%
Total | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	100.00%	100.00%