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Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Core Molding Technologies and its subsidiaries operate in the composites market as one operating segment as a molder of thermoplastic and thermoset structural products. The Company's operating segment consists of two component reporting units, Core Traditional and Horizon Plastics. The Company produces and sells molded products for varied markets, including medium and heavy-duty trucks, automobiles, marine, construction and other commercial markets. The Company offers customers a wide range of manufacturing processes to fit various program volume and investment requirements. These processes include compression molding of sheet molding compound ("SMC"), bulk molding compounds ("BMC"), resin transfer molding ("RTM"), liquid molding of dicyclopentadiene ("DCPD"), spray-up and hand-lay-up, glass mat thermoplastics ("GMT"), direct long-fiber thermoplastics ("D-LFT") and structural foam and structural web injection molding ("SIM"). As of December 31, 2019, Core Molding Technologies has its headquarters in Columbus, Ohio, and operates seven production facilities in Columbus and Batavia, Ohio; Gaffney, South Carolina; Winona, Minnesota; Matamoros and Escobedo, Mexico; and Cobourg, Ontario, Canada. All produce structural composite products.