| Cover Page | May 07, 2024 | May 09, 2023 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | May 07, 2024 | |
| Entity Registrant Name | Core Molding Technologies, Inc. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-12505 | |
| Entity Tax Identification Number | 31-1481870 | |
| Entity Address, Address Line One | 800 Manor Park Drive | |
| Entity Address, City or Town | Columbus | |
| Entity Address, State or Province | OH | |
| Entity Address, Postal Zip Code | 43228-0183 | |
| City Area Code | 614 | |
| Local Phone Number | 870-5000 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common Stock, par value $0.01 | |
| Trading Symbol | CMT | |
| Security Exchange Name | NYSEAMER | |
| Entity Emerging Growth Company | false | |
| Document Information [Line Items] | ||
| Document Period End Date | May 07, 2024 | |
| Entity Registrant Name | Core Molding Technologies, Inc. | |
| Entity Central Index Key | 0001026655 | |
| Amendment Flag | false |
