Revenue Recognition Revenue Recognition (Details 1)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
General Industry [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	36.40%	38.90%	37.00%	38.40%
General Industry [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	34.40%	35.90%	34.60%	35.80%
General Industry [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	41.00%	46.10%	42.40%	44.90%
Industrial Machinery [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	13.80%	12.90%	13.80%	12.90%
Industrial Machinery [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	9.10%	9.70%	9.70%	9.50%
Industrial Machinery [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	24.20%	20.30%	23.20%	20.80%
Metals [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	9.80%	12.10%	10.40%	11.10%
Metals [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	10.70%	13.60%	11.50%	12.30%
Metals [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	7.60%	8.50%	7.90%	8.20%
Food [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	9.20%	7.80%	8.90%	8.10%
Food [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	12.00%	10.10%	11.50%	10.40%
Food [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	3.00%	2.70%	2.80%	2.60%
Oil & Gas [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	6.10%	7.80%	6.60%	7.60%
Oil & Gas [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	8.10%	10.20%	8.70%	9.90%
Oil & Gas [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	1.80%	2.10%	1.90%	2.10%
Chem/Petrochem [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	6.90%	6.20%	6.30%	6.70%
Chem/Petrochem [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	3.60%	2.90%	3.20%	3.20%
Chem/Petrochem [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	14.40%	14.00%	13.50%	14.80%
Forest Products [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	7.50%	5.90%	6.90%	6.40%
Forest Products [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	9.50%	7.10%	8.60%	8.00%
Forest Products [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	2.90%	2.90%	3.00%	2.80%
Cement & Aggregate [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	5.70%	4.50%	5.40%	4.80%
Cement & Aggregate [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	7.80%	6.00%	7.30%	6.40%
Cement & Aggregate [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	1.00%	0.90%	1.00%	1.00%
Transportation [Domain]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	4.60%	3.90%	4.70%	4.00%
Transportation [Domain] | Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	4.80%	4.50%	4.90%	4.50%
Transportation [Domain] | Fluid Power & Flow Control Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	4.10%	2.50%	4.30%	2.80%
Total
Disaggregation of Revenue [Line Items]
Disaggregated Revenue by Customer Industry, Percent	100.00%	100.00%	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%	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%	100.00%	100.00%