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Description of Business	12 Months Ended
Description of Business	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Lawson Products, Inc. (“Lawson” or the “Company”) is a North American distributor of products and services to the industrial, commercial, institutional and government maintenance, repair and operations (“MRO”) marketplace. The Company has two operating segments. The Lawson operating segment distributes MRO products to customers primarily through a network of sales representatives offering VMI service to customers throughout the United States and Canada. In October 2017 the Company acquired The Bolt Supply House, Ltd. ("Bolt"), an MRO distributor located in western Canada. The Bolt operating segment distributes MRO products primarily through its 13 branches located in Western Canada.