Revenue Recognition - Product Vertcal (Details)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Product Revenue [Abstract]
Fastening Systems	22.80%	23.50%
Fluid Power	14.20%	15.20%
Specialty Chemicals	11.20%	11.30%
Cutting Tools and Abrasives	13.30%	13.30%
Electrical	10.80%	11.50%
Aftermarket Automotive Supplies	8.20%	8.40%
Safety	6.30%	4.60%
Welding and Metal Repair	1.40%	1.70%
Other Products	11.80%	10.50%
Total Products	100.00%	100.00%