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Post Retirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The components of expense for Core Molding Technologies’ post retirement benefit plans for the three months ended March 31, 2013 and 2012 are as follows:
 
Three Months Ended
 
March 31,
 
2013
 
2012
Pension expense:
 
 
 
Multi-employer plan contributions
$
105,000

 
$
112,000

Defined contribution plan contributions
169,000

 
174,000

Total pension expense
274,000

 
286,000

 
 
 
 
Health and life insurance:
 
 
 
Interest cost
83,000

 
91,000

Amortization of prior service costs
(124,000
)
 
(124,000
)
Amortization of net loss
50,000

 
40,000

Net periodic benefit cost
9,000

 
7,000

 
 
 
 
Total post retirement benefits expense
$
283,000

 
$
293,000