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Subsequent Event (Notes)	9 Months Ended
Subsequent Event (Notes)	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events On October 1, 2018, the Company completed the purchase of Screw Products, Inc., an industrial parts distributor for approximately $5.2 million which was paid in cash at the time of closing. Screw Products has a location in Dallas, Texas and a location in Dayton, Ohio.