XML 12 R1.htm IDEA: XBRL DOCUMENT v3.5.0.2
Document and Entity Information Document - shares
 6 Months Ended
Jun. 30, 2016
Aug. 08, 2016
Entity Information [Line Items]    
Entity Registrant Name CORE MOLDING TECHNOLOGIES INC.  
Entity Central Index Key 0001026655  
Document Type 10-Q  
Document Period End Date Jun. 30, 2016  
Amendment Flag false  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   7,791,483