Revenue Recognition Product Vertical (Tables)

3 Months Ended

Mar. 31, 2018

Product Vertical [Abstract]

Schedule of Product Information [Table Text Block]

Disaggregated revenue by product type follows:

	Three Months Ended March 31,
(Dollars in thousands)	2018		2017
Fastening Systems	23.8	%	20.8	%
Fluid Power	14.5	%	15.2	%
Specialty Chemicals	11.9	%	13.9	%
Cutting Tools and Abrasives	14.9	%	14.2	%
Electrical	11.2	%	12.4	%
Aftermarket Automotive Supplies	8.5	%	9.4	%
Safety	4.5	%	4.2	%
Welding and Metal Repair	1.8	%	2.4	%
Other	9.0	%	7.5	%
Consolidated Total	100.0	%	100.0	%