Core Molding (CMT) 10-K 11 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 10, 2016	Jun. 30, 2015
Entity Information [Line Items]
Entity Registrant Name	CORE MOLDING TECHNOLOGIES INC.
Entity Central Index Key	1,026,655
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
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 Public Float			$ 112,509,338
Entity Common Stock, Shares Outstanding		7,709,407

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales:
Products	$ 189,103,000	$ 169,744,000	$ 134,096,000
Tooling	9,965,000	5,460,000	10,029,000
Total net sales	199,068,000	175,204,000	144,125,000
Total cost of sales	162,816,000	145,018,000	120,551,000
Gross margin	36,252,000	30,186,000	23,574,000
Total selling, general and administrative expense	17,754,000	15,539,000	13,460,000
Income before interest and taxes	18,498,000	14,647,000	10,114,000
Interest expense	330,000	122,000	214,000
Income before income taxes	18,168,000	14,525,000	9,900,000
Current	4,889,000	2,370,000	2,755,000
Deferred	1,229,000	2,521,000	279,000
Total income taxes	6,118,000	4,891,000	3,034,000
Net income	$ 12,050,000	$ 9,634,000	$ 6,866,000
Net income per common share:
Basic (USD per share)	$ 1.59	$ 1.28	$ 0.95
Diluted (USD per share)	$ 1.58	$ 1.28	$ 0.92
Weighted average shares outstanding:
Basic (in shares)	7,583,000	7,508,000	7,220,000
Diluted (in shares)	7,623,000	7,553,000	7,435,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 12,050,000	$ 9,634,000	$ 6,866,000
Interest rate swaps:
Adjustment for amortization of losses included in net income	21,000	21,000	36,000
Income tax expense	8,000	7,000	12,000
Post retirement benefit plan adjustments:
Net actuarial (loss) gain	217,000	(2,679,000)	3,118,000
Prior service costs	(496,000)	(496,000)	(496,000)
Income tax benefit (expense)	81,000	1,119,000	(961,000)
Comprehensive income	$ 11,865,000	$ 7,592,000	$ 8,551,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 8,943,000	$ 2,312,000
Accounts receivable (less allowance for doubtful accounts: December 31, 2015 - $40,000; December 31, 2014 - $289,000)	36,886,000	34,360,000
Inventories:
Finished goods	1,646,000	1,402,000
Work in process	1,516,000	1,621,000
Raw materials and components	10,535,000	8,612,000
Total inventories, net	13,697,000	11,635,000
Deferred tax asset-current portion	1,598,000	1,868,000
Foreign sales tax receivable	280,000	1,447,000
Income taxes receivable	670,000	2,286,000
Prepaid expenses and other current assets	610,000	715,000
Total current assets	62,684,000	54,623,000
Property, plant and equipment, net	74,103,000	61,995,000
Goodwill	2,403,000	1,097,000
Intangible Assets, Net (Excluding Goodwill)	613,000	0
Total Assets	139,803,000	117,715,000
Current liabilities:
Current portion of long-term debt	3,714,000	1,714,000
Revolving line of credit	0	2,768,000
Current portion of interest rate swaps	2,000	34,000
Accounts payable	13,481,000	9,256,000
Tooling in progress	2,271,000	8,068,000
Current portion of post retirement benefits liability	1,088,000	1,064,000
Accrued liabilities:
Compensation and related benefits	8,474,000	7,087,000
Taxes	203,000	256,000
Other	1,917,000	1,132,000
Total current liabilities	31,150,000	31,379,000
Long-term debt	9,750,000	714,000
Interest rate swaps	0	3,000
Deferred tax liability	2,252,000	1,365,000
Post retirement benefits liability	7,918,000	8,108,000
Total Liabilities	51,070,000	41,569,000
Commitments and Contingencies	0	0
Stockholders’ Equity:
Preferred stock — $0.01 par value, authorized shares — 10,000,000; outstanding shares: 0 at December 31, 2015 and December 31, 2014	0	0
Common stock — $0.01 par value, authorized shares – 20,000,000; outstanding shares: 7,596,500 at December 31, 2015 and 7,559,012 at December 31, 2014	76,000	76,000
Paid-in capital	29,147,000	28,138,000
Accumulated other comprehensive income, net of income taxes	2,645,000	2,830,000
Treasury stock	(27,647,000)	(27,360,000)
Retained earnings	84,512,000	72,462,000
Total Stockholders’ Equity	88,733,000	76,146,000
Total Liabilities and Stockholders’ Equity	$ 139,803,000	$ 117,715,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Allowance for doubtful accounts	$ 40,000	$ 289,000
Stockholders' Equity:
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares outstanding	7,596,500	7,559,012

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($)	Total	Common Stock Outstanding	Paid-In Capital	Accumulated Other Comprehensive Income	Treasury Stock	Retained Earnings
Balance at Dec. 31, 2012	$ 57,998,000	$ 71,000	$ 25,526,000	$ 3,187,000	$ (26,748,000)	$ 55,962,000
Balance (in shares) at Dec. 31, 2012		7,130,804
Change in Stockholders' Equity:
Net income	6,866,000					6,866,000
Change in post retirement benefits, net of tax	1,661,000			1,661,000
Change in interest rate swaps, net of tax	24,000			24,000
Common stock issued (in shares)		132,725
Common stock issued	410,000	$ 1,000	409,000
Excess tax benefit — equity transactions	409,000		409,000
Purchase of treasury stock (in shares)		(36,329)
Purchase of treasury stock	(334,000)				(334,000)
Restricted stock issued (in shares)		91,573
Restricted stock issued	1,000	$ 1,000
Share-based compensation	413,000		413,000
Balance (in shares) at Dec. 31, 2013		7,318,773
Balance at Dec. 31, 2013	67,448,000	$ 73,000	26,757,000	4,872,000	(27,082,000)	62,828,000
Change in Stockholders' Equity:
Net income	9,634,000					9,634,000
Change in post retirement benefits, net of tax	(2,056,000)			(2,056,000)
Change in interest rate swaps, net of tax	14,000			14,000
Common stock issued (in shares)		186,060
Common stock issued	328,000	$ 2,000	326,000
Excess tax benefit — equity transactions	311,000		311,000
Purchase of treasury stock (in shares)		(21,797)
Purchase of treasury stock	(278,000)				(278,000)
Restricted stock issued (in shares)		75,976
Restricted stock issued	1,000	$ 1,000
Share-based compensation	744,000		744,000
Balance (in shares) at Dec. 31, 2014		7,559,012
Balance at Dec. 31, 2014	76,146,000	$ 76,000	28,138,000	2,830,000	(27,360,000)	72,462,000
Change in Stockholders' Equity:
Net income	12,050,000					12,050,000
Change in post retirement benefits, net of tax	(198,000)			(198,000)
Change in interest rate swaps, net of tax	13,000			13,000
Common stock issued (in shares)		3,000
Common stock issued	19,000		19,000
Excess tax benefit — equity transactions	205,000		205,000
Purchase of treasury stock (in shares)		(12,141)
Purchase of treasury stock	(287,000)				(287,000)
Restricted stock issued (in shares)		46,629
Restricted stock issued	0
Share-based compensation	785,000		785,000
Balance (in shares) at Dec. 31, 2015		7,596,500
Balance at Dec. 31, 2015	$ 88,733,000	$ 76,000	$ 29,147,000	$ 2,645,000	$ (27,647,000)	$ 84,512,000

Consolidated Statement of Stoc7

Consolidated Statement of Stockholders' Equity (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Tax effect of change in post retirement benefits	$ 81,000	$ 1,119,000	$ (961,000)
Tax effect of change in interest rate swaps	$ 8,000	$ 7,000	$ 12,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Cash flows from operating activities:
Net income	$ 12,050,000	$ 9,634,000	$ 6,866,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,041,000	5,023,000	4,878,000
Deferred income taxes	1,229,000	2,521,000	279,000
Mark-to-market of interest rate swaps	(14,000)	(45,000)	(73,000)
Share-based compensation	785,000	744,000	413,000
Loss on disposal of assets	0	0	5,000
Foreign Currency Transaction Gain (Loss), before Tax	54,000	(108,000)	(27,000)
Change in operating assets and liabilities, net of effects of acquisition:
Accounts receivable	(911,000)	(12,292,000)	(7,446,000)
Inventories	(1,387,000)	(808,000)	(862,000)
Income taxes receivable	1,616,000	(1,959,000)	944,000
Prepaid and other assets	1,395,000	(78,000)	93,000
Accounts payable	2,095,000	(275,000)	2,259,000
Accrued and other liabilities	(3,786,000)	9,031,000	125,000
Post retirement benefits liability	(444,000)	(777,000)	(591,000)
Net cash provided by operating activities	18,615,000	10,827,000	6,917,000
Cash flows from investing activities:
Purchase of property, plant and equipment	(5,683,000)	(10,679,000)	(9,332,000)
Proceeds from sale of property and equipment	0	0	92,000
Business Combination, Purchase Price Allocated	(14,512,000)	0	0
Net cash used in investing activities	(20,195,000)	(10,679,000)	(9,240,000)
Cash flows from financing activities:
Gross borrowings on revolving line of credit	(10,102,000)	(67,993,000)	0
Gross borrowings on revolving line of credit	7,334,000	70,761,000	0
Borrowing of Secured Debt Term Loan	15,500,000	0	0
Repayments of Secured Debt Term Loan	(2,750,000)	0	0
Payment of principal on Mexican loan	0	(1,600,000)	(1,600,000)
Payment of principal on capex loan	(1,714,000)	(1,715,000)	(1,714,000)
Payment of principal on industrial development revenue bond	0	0	(420,000)
Excess Tax Benefit from Share-based Compensation, Financing Activities	211,000	395,000	409,000
Payments related to the purchase of treasury stock	(287,000)	(278,000)	(334,000)
Proceeds from issuance of common stock	19,000	328,000	410,000
Net cash provided by (used in) financing activities	8,211,000	(102,000)	(3,249,000)
Net change in cash and cash equivalents	6,631,000	46,000	(5,572,000)
Cash and cash equivalents at beginning of year	2,312,000	2,266,000	7,838,000
Cash and cash equivalents at end of year	8,943,000	2,312,000	2,266,000
Cash paid for:
Interest (net of amounts capitalized)	279,000	110,000	204,000
Income taxes	4,218,000	3,567,000	1,296,000
Non Cash:
Fixed asset purchases in accounts payable	464,000	557,000	$ 709,000
Commitments For Capital Expenditures In Progress	$ 1,102,000	$ 1,682,000

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Core Molding Technologies and its subsidiaries operate in the plastics market in a family of products known as “reinforced plastics.” Reinforced plastics are combinations of resins and reinforcing fibers (typically glass or carbon) that are molded to shape. Core Molding Technologies is a manufacturer of sheet molding compound ("SMC") and molder of fiberglass reinforced plastics. The Company specializes in large-format moldings and offers a wide range of fiberglass processes, including compression molding of SMC, glass mat thermoplastics ("GMT"), bulk molding compounds ("BMC") and direct long-fiber thermoplastics ("D-LFT"); spray-up, hand-lay-up, and resin transfer molding ("RTM"). Additionally, the Company offers reaction injection molding ("RIM"), utilizing dicyclopentadiene technology. Core Molding Technologies operates five production facilities in Columbus, Ohio; Batavia, Ohio; Gaffney, South Carolina; Winona, Minnesota; and Matamoros, Mexico. The Company operates in one business segment as a manufacturer of SMC and molder of fiberglass reinforced plastics. The Company produces and sells SMC and molded products for varied markets, including medium and heavy-duty trucks, automobiles, marine, construction and other commercial markets.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation - The accompanying consolidated financial statements include the accounts of all subsidiaries after elimination of all intercompany accounts, transactions, and profits. Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and reported amounts of revenues and expenses during the reporting period. Significant estimates relate to allowances for doubtful accounts, inventory reserves, self-insurance reserves related to healthcare and workers compensation, deferred taxes, post retirement benefits, goodwill and long-lived assets. Actual results could differ from those estimates. Revenue Recognition - Revenue from product sales is recognized at the time products are shipped and title transfers. Allowances for returned products and other credits are estimated and recorded as revenue is recognized. Tooling revenue is recognized when the customer approves the tool and accepts ownership. Progress billings and expenses are shown net as an asset or liability on the Company’s Consolidated Balance Sheet. Tooling in progress can fluctuate significantly from period to period and is dependent upon the stage of tooling projects and the related billing and expense payment timetable for individual projects and therefore does not necessarily reflect projected income or loss from tooling projects. At December 31, 2015 , the Company had a net liability related to tooling in progress of $ 2,271,000 , which represents approximately $21,967,000 of progress tooling billings and $19,696,000 of progress tooling expenses. At December 31, 2014 , the Company had a net liability related to tooling in progress of $ 8,068,000 which represents approximately $10,407,000 of progress tooling billings and $2,339,000 of progress tooling expenses. Cash and Cash Equivalents - The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash is held primarily in one bank. The Company had cash on hand of $8,943,000 at December 31, 2015 and $2,312,000 at December 31, 2014 . Accounts Receivable Allowances - Management maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. The Company recorded an allowance for doubtful accounts of $ 40,000 at December 31, 2015 and $ 289,000 December 31, 2014 . Management also records estimates for customer returns and deductions, discounts offered to customers, and for price adjustments. Should customer returns and deductions, discounts, and price adjustments fluctuate from the estimated amounts, additional allowances may be required. The Company had an allowance for estimated chargebacks of $523,000 at December 31, 2015 and $813,000 at December 31, 2014 . There have been no material changes in the methodology of these calculations. Inventories - Inventories, which include material, labor and manufacturing overhead, are valued at the lower of cost or market. The inventories are accounted for using the first-in, first-out (FIFO) method of determining inventory costs. Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage. The Company has recorded an allowance for slow moving and obsolete inventory of $863,000 at December 31, 2015 and $940,000 at December 31, 2014 . Property, Plant, and Equipment - Property, plant, and equipment are recorded at cost. Depreciation is provided on a straight-line method over the estimated useful lives of the assets. The carrying amount of long‑lived assets is evaluated annually to determine if adjustment to the depreciation period or to the unamortized balance is warranted. Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Depreciation expense was $5,955,000 , $5,009,000 and $4,783,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively. The Company capitalized interest costs of approximately $2,000 and $80,000 for the years ended December 31, 2015 and 2014 , respectively. Long-Lived Assets - Long-lived assets consist primarily of property, plant and equipment and definite-lived intangibles. The Company acquired substantially all of the assets of CPI on March 20, 2015, which resulted in approximately $650,000 of definite-lived intangibles and $12,474,000 of property, plant and equipment, all of which were recorded at fair value. The recoverability of long-lived assets is evaluated by an analysis of operating results and consideration of other significant events or changes in the business environment. The Company evaluates whether impairment exists for long-lived assets on the basis of undiscounted expected future cash flows from operations before interest. There was no impairment of the Company's long-lived assets for the years ended December 31, 2015 , 2014 and 2013 . Goodwill - The Company has recorded $ 2,403,000 of goodwill as a result of two acquisitions. In 2001, the Company acquired certain assets of Airshield Corporation, and as a result, recorded goodwill in the amount of $1,097,000 . The Company also acquired substantially all of the assets of CPI on March 20, 2015, which resulted in approximately $1,306,000 of goodwill. The Company evaluates goodwill annually on December 31 st to determine whether impairment exists, or at interim periods if an indicator of possible impairment exists. The Company evaluates goodwill for impairment utilizing the one-step qualitative assessment. We consider relevant events and circumstances that affect the fair value or carrying amount of the Company. Such events and circumstances could include macroeconomic conditions, industry and market conditions, cost factors, overall financial performance, entity specific events and capital markets pricing. The Company places more weight on the events and circumstances that most affect the Company's fair value or carrying amount. These factors are all considered by management in reaching its conclusion about whether to perform the first step of the impairment test. If the Company's carrying amount is determined to be more likely than not impaired based on the one-step qualitative approach, a quantitative valuation to estimate the fair value of the Company is performed. Fair value measurements are based on a projected discounted cash flow valuation model, in accordance with ASC 350, “Intangibles-Goodwill and Other.” There was no impairment of the Company's goodwill for the years ended December 31, 2015 , 2014 and 2013 . Income Taxes - The Company records deferred income taxes for differences between the financial reporting basis and income tax basis of assets and liabilities. A detailed breakout is located in Note 11. Self-Insurance - The Company is self-insured with respect to its Columbus and Batavia, Ohio, Gaffney, South Carolina and Brownsville, Texas medical, dental and vision claims and Columbus and Batavia, Ohio workers’ compensation claims, all of which are subject to stop-loss insurance thresholds. The Company has recorded an estimated liability for self-insured medical, dental and vision claims incurred but not reported and worker’s compensation claims incurred but not reported at December 31, 2015 and December 31, 2014 of $ 1,074,000 and $1,165,000 , respectively. Post Retirement Benefits - Management records an accrual for post retirement costs associated with the health care plan sponsored by the Company for certain employees. Should actual results differ from the assumptions used to determine the reserves, additional provisions may be required. In particular, increases in future healthcare costs above the assumptions could have an adverse effect on the Company's operations. The effect of a change in healthcare costs is described in Note 12 of the Notes to Consolidated Financial Statements. Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarially computed estimates of $ 9,006,000 at December 31, 2015 and $ 9,172,000 at December 31, 2014 . Fair Value of Financial Instruments - The Company's financial instruments consist of long-term debt, interest rate swaps, accounts receivable, and accounts payable. The carrying amount of these financial instruments approximated their fair value. Further detail is located in Note 15. Concentration Risks - The Company has concentration risk related to significant amounts of sales and accounts receivable with certain customers. Sales to four major customers comprised 82% , 87% and 86% of total sales in 2015 , 2014 and 2013 , respectively (see Note 4). Concentrations of accounts receivable balances with four customers accounted for 88% and 90% of accounts receivable at December 31, 2015 and 2014 , respectively. The Company performs ongoing credit evaluations of its customers' financial condition. The Company maintains reserves for potential bad debt losses, and such bad debt losses have been historically within the Company's expectations. Sales to certain customers' manufacturing and service locations in Mexico and Canada totaled 35% , 30% and 34% of total sales for 2015 , 2014 and 2013 , respectively. As of December 31, 2015 , the Company employed a total of 1,525 employees, which consisted of 685 employees in its United States operations and 840 employees in its Mexican operations. Of these 1,525 employees, 293 are covered by a collective bargaining agreement with the International Association of Machinists and Aerospace Workers (“IAM”), which extends to August 7, 2016, and 731 are covered by a collective bargaining agreement with Sindicato de Jorneleros y Obreros, which extends to January 16, 2017. Earnings Per Common Share - Basic earnings per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted earnings per common share are computed similarly but include the effect of the assumed exercise of dilutive stock options and vesting of restricted stock under the treasury stock method. A detailed computation of earnings per share is located in Note 3. Research and Development - Research and development activities focus on developing new material formulations, new products, new production capabilities and processes, and improving existing products and manufacturing processes. The Company does not maintain a separate research and development organization or facility, but uses its production equipment, as necessary, to support these efforts and cooperates with its customers and its suppliers in research and development efforts. Likewise, manpower to direct and advance research and development is integrated with the existing manufacturing, engineering, production, and quality organizations. Research and development costs, which are expensed as incurred, totaled approximately $ 719,000 , $475,000 and $466,000 in 2015 , 2014 and 2013 . Foreign Currency Adjustments - In conjunction with the Company's acquisition of certain assets of Airshield Corporation, the Company established operations in Mexico. The functional currency for the Mexican operations is the United States dollar. All foreign currency asset and liability amounts are remeasured into United States dollars at end-of-period exchange rates. Income statement accounts are translated at the weighted monthly average rates. Gains and losses resulting from translation of foreign currency financial statements into United States dollars and gains and losses resulting from foreign currency transactions are included in current results of operations. Net foreign currency translation and transaction activity is included in selling, general and administrative expense. This activity resulted in a gain of $ 54,000 in 2015 and losses of $ 108,000 and $ 27,000 in 2014 and 2013 , respectively. Recent Accounting Pronouncements - In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition. ASU Topic 606 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The effective date for ASU Topic 606 has been delayed until the first quarter of fiscal year 2018 using one of two retrospective application methods. The Company is currently assessing the transition alternatives and potential impact the pronouncement and adoption of ASU Topic 606 will have on the Company’s financial statements. Early adoption is permitted, but not before annual periods beginning after December 15, 2016. In August 2014, the FASB issued Accounting Standards Update No. 2014-15, "Presentation of Financial Statements-Going Concern (Topic 205-40)" ("ASU 2014-15"). Under the standard, management is required to evaluate for each annual and interim reporting period whether it is probable that the entity will not be able to meet its obligations as they become due within one year after the date that financial statements are issued. ASU 2014-15 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2017. The Company does not believe that the pronouncement will have an impact on the Company's financial statements. In February 2015, the FASB issued ASU No. 2015-03, "Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ("ASU 2015-03"). Under the standard, debt issuance costs are required to be recorded as a direct reduction of the debt liability on the balance sheet rather than as an asset. The standard is effective for the Company as of January 1, 2016 and is not expected to significantly impact the Company's financial statements. In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. The amendments in this guidance do not apply to inventory that is measured using last-in, first-out (LIFO) or the retail inventory method. The amendments apply to all other inventory, which includes inventory that is measured using first-in, first-out or average cost. Within the scope of this new guidance, an entity should measure inventory at the lower of cost and net realizable value; where, net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The new guidance is effective for annual periods beginning after December 15, 2016, with early adoption permitted. The new guidance must be applied on a prospective basis. The Company does not believe that the pronouncement will have a material impact on the Company's financial statements. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations: Simplifying the Accounting for Measurement-Period Adjustments, which is an accounting standards update with new guidance that eliminates the requirement in a business combination to restate prior period financial statements for measurement period adjustments. Instead, measurement period adjustments will be recognized in the reporting period in which the adjustment is identified. The standards update is effective for fiscal years and interim periods beginning after December 15, 2015. The amendments should be applied prospectively to measurement period adjustments that occur after the effective date of this update with early adoption permitted for financial statements that have not been issued. We will adopt this standard update as required and recognize any such future adjustments accordingly. In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes (Topic 740). This update requires all deferred tax assets and liabilities, and any related valuation allowance, to be classified as noncurrent on the balance sheet. The ASU simplifies the current standard, which requires entities to separately present deferred tax assets and liabilities as current and noncurrent in a classified balance sheet. The ASU is effective for annual reporting periods beginning on or after December 15, 2016, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual reporting period. The Company will adopt this standards update as required and does not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842). This update requires organizations to recognize lease assets and lease liabilities on the balance sheet and also disclose key information about leasing arrangements. This ASU is effective for annual reporting periods beginning on or after December 15, 2018, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual period. The Company will adopt this standards update as required and does not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

Net Income per Common Share

Net Income per Common Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Net Income per Common Share	Net Income per Common Share Net income per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted net income per common share is computed similarly but includes the effect of the assumed exercise of dilutive stock options and restricted stock under the treasury stock method. The computation of basic and diluted net income per common share is as follows: December 31, 2015 2014 2013 Net income $ 12,050,000 $ 9,634,000 $ 6,866,000 Weighted average common shares outstanding — basic 7,583,000 7,508,000 7,220,000 Effect of dilutive securities 40,000 45,000 215,000 Weighted average common and potentially issuable common shares outstanding — diluted 7,623,000 7,553,000 7,435,000 Basic net income per common share $ 1.59 $ 1.28 $ 0.95 Diluted net income per common share $ 1.58 $ 1.28 $ 0.92 At December 31, 2015 , there were no outstanding stock options. At December 31, 2014 and 2013 , all unexercised stock options were included in diluted earnings per share.

Major Customers

Major Customers	12 Months Ended
	Dec. 31, 2015
Revenue, Net [Abstract]
Major Customers	Major Customers The Company had four major customers during 2015 , Navistar, Volvo, PACCAR and Yamaha. Major customers are defined as customers whose current year sales individually consist of more than ten percent of total sales during any annual or interim reporting period in the current year. The loss of a significant portion of sales to Navistar, Volvo, PACCAR or Yamaha would have a material adverse effect on the business of the Company. The following table presents sales revenue for the above-mentioned customers for the years ended December 31: 2015 2014 2013 Navistar product sales $ 50,169,000 $ 51,254,000 $ 46,384,000 Navistar tooling sales 6,246,000 76,000 972,000 Total Navistar sales 56,415,000 51,330,000 47,356,000 Volvo product sales 53,525,000 46,340,000 11,508,000 Volvo tooling sales 1,600,000 2,519,000 936,000 Total Volvo sales 55,125,000 48,859,000 12,444,000 PACCAR product sales 33,452,000 35,602,000 42,784,000 PACCAR tooling sales 978,000 526,000 7,370,000 Total PACCAR sales 34,430,000 36,128,000 50,154,000 Yamaha product sales 16,766,000 16,911,000 13,648,000 Yamaha tooling sales — — — Total Yamaha sales 16,766,000 16,911,000 13,648,000 Other product sales 35,191,000 19,637,000 19,772,000 Other tooling sales 1,141,000 2,339,000 751,000 Total other sales 36,332,000 21,976,000 20,523,000 Total product sales 189,103,000 169,744,000 134,096,000 Total tooling sales 9,965,000 5,460,000 10,029,000 Total sales $ 199,068,000 $ 175,204,000 $ 144,125,000

Foreign Operations

Foreign Operations	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Foreign Operations	Foreign Operations In conjunction with the Company's acquisition of certain assets of Airshield Corporation on October 16, 2001, the Company established manufacturing operations in Mexico (under the Maquiladora program). The Mexican operation is a captive manufacturing facility of the Company and the functional currency is United States dollars. Essentially all sales of the Mexican operations are made in United States dollars, which totaled $69,235,000 , $61,313,000 and $61,612,000 in 2015 , 2014 and 2013 , respectively. Expenses are incurred in the United States dollar and the Mexican peso. Expenses incurred in pesos include labor, utilities, supplies and materials, and amounted to approximately 19% , 22% and 23% of sales produced at the Matamoros operations in 2015 , 2014 and 2013 , respectively. The Company's manufacturing operation in Mexico is subject to various political, economic, and other risks and uncertainties including safety and security concerns inherent to Mexico. Among other risks, the Company's Mexican operations are subject to domestic and international customs and tariffs, changing taxation policies, and governmental regulations. All of the Company's product is sold to U.S. based customers in U.S. dollars. The following table provides information related to sales by country, based on the ship to location of customers' production facilities, for the years ended December 31: 2015 2014 2013 United States $ 129,651,000 $ 123,317,000 $ 95,063,000 Mexico 63,586,000 47,772,000 45,069,000 Canada 5,831,000 4,115,000 3,993,000 Total $ 199,068,000 $ 175,204,000 $ 144,125,000 The following table provides information related to the location of property, plant and equipment, net, as of December 31: 2015 2014 United States $ 44,191,000 $ 31,674,000 Mexico 29,912,000 30,321,000 Total $ 74,103,000 $ 61,995,000

Property, Plant & Equipment

Property, Plant & Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant & Equipment	Property, Plant, and Equipment Property, plant, and equipment consisted of the following at December 31: 2015 2014 Land and land improvements $ 5,958,000 $ 5,098,000 Buildings 41,417,000 37,143,000 Machinery and equipment 87,482,000 75,905,000 Tools, dies, and patterns 808,000 808,000 Additions in progress 2,331,000 979,000 Total 137,996,000 119,933,000 Less accumulated depreciation (63,893,000 ) (57,938,000 ) Property, plant, and equipment - net $ 74,103,000 $ 61,995,000 Additions in progress at December 31, 2015 and 2014 relate to building improvements and equipment purchases that were not yet completed at year end. At December 31, 2015 , commitments for capital expenditures in progress were $ 1,102,000 and included $464,000 recorded on the balance sheet in accounts payable. At December 31, 2014 , commitments for capital expenditures in progress were $1,682,000 , and included $557,000 recorded on the balance sheet in accounts payable. The Company capitalized interest of $2,000 and $80,000 for the years ended December 31, 2015 and 2014 , respectively.

Business Combination (Notes)

Business Combination (Notes)	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	On March 20, 2015, the Company acquired substantially all of the assets of CPI Binani, Inc., a wholly owned subsidiary of Binani Industries Limited, located in Winona, Minnesota for a cash purchase price of $15,000,000 , which expanded the Company's process capabilities to include D-LFT and diversified the customer base. The purchase price was subject to working capital adjustments resulting in a reduction in the purchase price of $488,000 . Cash paid at closing was financed through borrowing under the Company's existing credit facility, as amended and further described in Note 9 below. Consideration was allocated to assets acquired and liabilities assumed based on their fair values as of the acquisition date as follows: Accounts Receivable $ 1,615,000 Inventory 675,000 Other Current Assets 171,000 Property and Equipment 12,474,000 Intangibles 650,000 Goodwill 1,306,000 Accounts Payable (2,277,000 ) Other Current Liabilities (102,000 ) $ 14,512,000 The purchase price included consideration for strategic benefits, including an assembled workforce, operational infrastructure and synergistic revenue opportunities, which resulted in the recognition of goodwill. The goodwill is deductible for income tax purposes. The acquisition is not considered significant to the Company's consolidated balance sheet and results of operations. Accordingly, no pro-forma results are provided prior to the effective date of the acquisition. The Company incurred $303,000 of expenses for the year ended December 31, 2015 associated with the acquisition, which is recorded in selling, general and administrative expense.

Goodwill and Intangible Asset D

Goodwill and Intangible Asset Disclosure (Notes)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	8. Goodwill and Intangibles Goodwill activity for the year ended December 31, 2015 consisted of the following: Balance at December 31, 2014 $ 1,097,000 Additions 1,306,000 Impairment — Balance at December 31, 2015 $ 2,403,000 Intangible assets at December 31, 2015 were comprised of the following: Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (7,000 ) $ 243,000 Customer Relationships 10 Years 400,000 (30,000 ) 370,000 $ 650,000 $ (37,000 ) $ 613,000 All definite-lived intangible assets were acquired as part of the acquisition of CPI, therefore no definite-lived intangible assets existed at December 31, 2014. The aggregate intangible asset amortization expense was $37,000 for the year ended December 31, 2015. The Company incurred no amortization expense for the years ended December 31, 2014 and 2013.

Debt and Leases

Debt and Leases	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Debt and Leases	Debt and Leases Long-term debt consists of the following at: December 31, December 31, Capex loan payable to a bank, interest at a variable rate (2.04% and 1.76% at December 31, 2015 and 2014, respectively) with monthly payments of interest and principal over a seven-year period through May 2016. $ 714,000 $ 2,428,000 Term loan payable to a bank, interest at a variable rate (2.24% at December 31, 2015) with monthly payments of interest and principal through March 2020. 12,750,000 — Revolving Line of Credit — 2,768,000 Total 13,464,000 5,196,000 Less current portion (3,714,000 ) (4,482,000 ) Long-term debt $ 9,750,000 $ 714,000 Credit Agreement In 2008, the Company and its wholly owned subsidiary, Corecomposites de Mexico, S. de R.L. de C.V., entered into a credit agreement (the “Credit Agreement”) to refinance certain existing debt and borrow funds to finance the construction of the Company’s manufacturing facility in Mexico. Under this Credit Agreement, the Company received certain loans, subject to the terms and conditions stated in the agreement, which included (1) a $12,000,000 Capex loan; (2) an $8,000,000 Mexican loan; (3) an $8,000,000 variable rate revolving line of credit; and (4) a letter of credit in an undrawn face amount of $3,332,493 with respect to the Company’s existing Industrial Development Revenue Bond (“IDRB”) financing. The Credit Agreement is secured by a guarantee of each U.S. subsidiary of the Company, and by a lien on substantially all of the present and future assets of the Company and its U.S. subsidiaries, except that only 65% of the stock issued by Corecomposites de Mexico, S. de C.V. has been pledged. The $8,000,000 Mexican loan was also secured by substantially all of the present and future assets of the Company’s Mexican subsidiary. On March 27, 2013, the Company and its wholly owned subsidiary, Corecomposites de Mexico, S. de R.L. de C.V., entered into an eighth amendment (the "Eighth Amendment") to the Credit Agreement. Pursuant to the terms of the Eighth Amendment, the parties agreed to modify certain terms of the Credit Agreement. These modifications included (1) an increase to the borrowing limit on the revolving line of credit from $8,000,000 to $18,000,000 ; (2) modification to the fixed charge definition to exclude capital expenditures of up to $18,000,000 associated with the Company's compression molding capacity expansion and any sheet molding compound manufacturing capacity expansion; (3) to extend the commitment period for the revolving line of credit to May 31, 2015; and (4) to cancel, effective immediately, the unused $10,000,000 Mexican Expansion Revolving Loan. On October 31, 2013, the Company and its wholly owned subsidiary, Corecomposites de Mexico, S. de R.L. de C.V., entered into a ninth amendment (the "Ninth Amendment") to the Credit Agreement. Pursuant to the terms of the Ninth Amendment, the parties agreed to decrease the applicable margin for interest rates on Eurodollar Loans and Daily Libor Loans to 160 basis points from 175 basis points. On March 20, 2015, The Company and its wholly owned subsidiary, Corecomposites de Mexico, S. de R.L. de C.V., entered into a tenth amendment (the "Tenth Amendment") to the Credit Agreement that the parties originally entered into on December 9, 2008. Pursuant to the terms of the Tenth Amendment, the parties agreed to modify certain terms of the Credit Agreement. These modifications included (1) an extension of the commitment period for the revolving line of credit to May 31, 2017; (2) an agreement to make a term loan in an original amount of $15,500,000 with the proceeds to be used to finance the acquisition of CPI assets; and (3) modifications to the Credit Agreement's fixed charge definition to exclude (i) certain capital expenditures that are incurred on or before June 30, 2016, up to an aggregate amount not to exceed $4,400,000, and (ii) certain capital expenditures that were incurred on or before June 30, 2015, up to an aggregate amount not to exceed $18,000,000. On March 30, 2015, the Company repaid $500,000 of unused proceeds from the original term loan. Capex Loan The $12,000,000 Capex loan was a construction draw loan that converted to a seven-year term loan with fixed monthly principal payments. Borrowings made pursuant to this loan bear interest, payable monthly at 30 day LIBOR plus 160 basis points. Term Loan The $15,500,000 Term Loan has fixed monthly principal payments payable over a five-year period. Borrowings made pursuant to this loan bear interest, payable monthly at 30 day LIBOR plus 180 basis points. Mexican Loan The $8,000,000 Mexican loan was also a construction draw loan to finance the production facility in Matamoros, Mexico that was converted to a five-year term loan with annual payments commencing January 2010. This commitment bore interest at LIBOR plus 160 basis points and was paid in full in January 2014. Industrial Development Revenue Bond In May 1998, the Company borrowed $7,500,000 through the issuance of an Industrial Development Revenue Bond (“IDRB”). The IDRB bore interest at a weekly adjustable rate and was paid in full in April 2013. As security for the IDRB, the Company obtained a letter of credit from a commercial bank. The letter of credit expired in April 2013 upon final payment of the loan. Revolving Line of Credit At December 31, 2015 , the Company had available an $18,000,000 variable rate revolving line of credit scheduled to mature on May 31, 2017. The revolving line of credit bears interest at daily LIBOR plus 160 basis points and is collateralized by all of the present and future assets of the Company and its U.S. subsidiaries (except that only 65% of the stock issued by Corecomposites de Mexico, S. de C.V. has been pledged). Annual maturities of long-term debt are as follows: 2016 $ 3,714,000 2017 3,000,000 2018 3,000,000 2019 3,000,000 2020 750,000 Thereafter — Total $ 13,464,000 Interest Rate Swaps In conjunction with its variable rate IDRB, the Company entered into an interest rate swap agreement through April 2013, which was initially designated as a cash flow hedging instrument. The IDRB interest rate swap expired in April 2013 upon payment in full of the IDRB. Under this agreement, the Company paid a fixed rate of 4.89% to the counterparty and received 76% of the 30-day commercial paper rate ( 0.10% at December 31, 2012). During 2010, the Company determined this interest rate swap was no longer highly effective. As a result, the Company discontinued the use of hedge accounting effective January 1, 2010 related to this swap, and began recording mark-to-market adjustments within interest expense in the Company’s Consolidated Statements of Income. The pre-tax loss previously recognized in Accumulated Other Comprehensive Income (Loss), totaling $200,000 as of December 31, 2009, was amortized as an increase to interest expense of $5,000 per month, or $3,000 net of tax, over the remaining term of the interest rate swap agreement. The IDRB was paid in full in April 2013. On December 18, 2008, the Company entered into an interest rate swap agreement that became effective May 1, 2009 and continues through May 2016, which was designated as a cash flow hedge of the $12,000,000 Capex loan. Under this agreement, the Company pays a fixed rate of 2.295% to the counterparty and receives 30 day LIBOR ( 0.44% at December 31, 2015 ). Effective March 31, 2009, the interest terms in the Company’s Credit Agreement related to the $12,000,000 Capex loan were amended. The Company then determined this interest rate swap was no longer highly effective. As a result, the Company discontinued the use of hedge accounting effective March 31, 2009 related to this swap, and began recording mark-to-market adjustments within interest expense in the Company’s Consolidated Statements of Income. The pre-tax loss previously recognized in Accumulated Other Comprehensive Income (Loss), totaling $146,000 as of March 31, 2009, is being amortized as an increase to interest expense of $2,000 per month, or $1,000 net of tax, over the remaining term of the interest rate swap agreement. The fair value of the swap as of December 31, 2015 and December 31, 2014 was a liability of $2,000 and $37,000 , respectively. The Company recorded interest income of $35,000 , $ 66,000 and $ 102,000 for mark-to-market adjustments of fair value related to this swap for the years ended December 31, 2015 , 2014 and 2013 , respectively. The notional amount of the swap at December 31, 2015 and December 31, 2014 was $714,000 and $2,428,000 , respectively. For the years ended December 31, 2015 , 2014 and 2013 , interest expense includes expense of $ 32,000 , $ 70,000 and $ 110,000 , respectively, for settlements related to the Company’s swaps. Bank Covenants The Company is required to meet certain financial covenants included in the Credit Agreement with respect to leverage ratios, fixed charge ratios, and capital expenditures, as well as other customary affirmative and negative covenants. As of December 31, 2015 , the Company was in compliance with its financial covenants associated with the loans made under the Credit Agreement as described above. Leases The Company has entered into an operating lease agreement through July 2019 for the manufacturing facility located in Batavia, Ohio. Additionally, the Company leases a warehouse and distribution center in Brownsville, Texas under a 5 -year operating lease agreement expiring in October 2017. Total rental expense was $ 696,000 , $ 767,000 and $ 800,000 for 2015 , 2014 and 2013 , respectively. Included in rental expense are both operating lease payments and rental costs related to the use of equipment during the normal course of business under nonbinding terms. Future minimum operating lease payments are as follows: 2016 $ 539,000 2017 486,000 2018 328,000 2019 192,000 Thereafter — Total minimum lease payments $ 1,545,000

Stock Based Compensation

Stock Based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation The Company has a Long Term Equity Incentive Plan (the “2006 Plan”), as approved by the Company’s stockholders in May 2006. The 2006 Plan allows for grants to directors and employees of non-qualified stock options, incentive stock options, stock appreciation rights, restricted stock, performance shares, performance units and other incentive awards (“Stock Awards”) up to an aggregate of 3,000,000 awards, each representing a right to buy a share of Core Molding Technologies common stock. Stock Awards can be granted under the 2006 Plan through the earlier of December 31, 2025, or the date the maximum number of available awards under the 2006 Plan have been granted. The number of shares remaining available for future issuance is 1,542,615 . The options that were granted under the 2006 Plan had vesting schedules of five or nine and one-half years from the date of grant, or immediately upon change in ownership, were not exercisable after ten years from the date of grant, and were granted at prices which equal or exceed the fair market value of Core Molding Technologies common stock at the date of grant. Restricted stock granted under the 2006 Plan require the individuals receiving the grants to maintain certain common stock ownership thresholds and vest over three years or upon the date of the participants' sixty-fifth birthday, death, disability or change in control. Core Molding Technologies follows the provisions of FASB ASC 718 requiring that compensation cost relating to share-based payment transactions be recognized in the financial statements. The cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the employee's requisite service period (generally the vesting period of the equity award). Core Molding Technologies adopted FASB ASC 718 using the modified prospective method. Under this method, FASB ASC 718 applies to all awards granted or modified after the date of adoption. In addition, compensation expense has been recognized for any unvested stock option awards outstanding as of the date of adoption on a straight-line basis over the remaining vesting period. Stock Options There were no grants of options in the years ended December 31, 2015 , 2014 and 2013 . Total compensation cost related to incentive stock options was $ 0 for the years ended December 31, 2015 and 2014 , and $5,000 for the year ended December 31, 2013 . Compensation expense from incentive stock options is included in selling, general, and administrative expenses. There was no tax benefit recorded for this compensation cost as the expense relates to incentive stock options that do not qualify for a tax deduction until, and only if, a disqualifying disposition occurs. During the years ended December 31, 2015 , 2014 and 2013 Core Molding Technologies received approximately $19,000 , $ 328,000 and $ 410,000 , respectively, in cash from the exercise of stock options. The aggregate intrinsic value of these options was approximately $ 26,000 , $ 915,000 and $ 825,000 , respectively, in each of those years. The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option. Tax benefit received as a result of disqualified dispositions related to stock options was $9,000 , for the year ended December 31, 2015 , which was recorded as a credit to income tax expense of $6,000 and a credit to additional paid in capital of $3,000 . For the year ended December 31, 2014 the tax benefit received as a result of disqualified dispositions related to stock options was $ 311,000 , which was recorded as a credit to income tax expense of $ 84,000 and a credit to additional paid in capital of $ 227,000 . For the year ended December 31, 2013 the tax benefit received as a result of disqualified dispositions related to stock options was $300,000 , which was recorded as a credit to additional paid in capital. The following summarizes the activity relating to stock options under the plans mentioned above for the years ended December 31: 2015 2014 2013 Number Wtd. Avg. Number of Options Wtd. Avg. Exercise Price Number of Options Wtd. Avg. Outstanding - beginning of year 3,000 $ 6.40 227,750 $ 3.57 374,875 $ 3.37 Granted — — — — — — Exercised (3,000 ) 6.40 (224,750 ) 3.53 (132,725 ) 3.09 Forfeited — — — — (14,400 ) 2.75 Outstanding - end of year — $ — 3,000 $ 6.40 227,750 $ 3.57 Exercisable at December 31 — $ — 3,000 $ 6.40 227,750 $ 3.57 Vested or expected to vest at December 31 — $ — 3,000 $ 6.40 227,750 $ 3.57 The following summarizes the status of, and changes to, unvested options during the years ended December 31: Number of Options Wtd. Avg. Unvested at January 1, 2013 14,400 $ 2.75 Granted — — Vested — — Forfeited (14,400 ) 2.75 Unvested at December 31, 2013 — — All options fully vested during 2013. There was no unvested stock options and no unrecognized compensation cost related to stock options during 2014 and 2015. Restricted Stock In 2006, the Company began granting shares of its common stock to certain directors, officers, and key managers in the form of unvested stock (“Restricted Stock”). These awards are recorded at the market value of Core Molding Technologies’ common stock on the date of issuance and amortized ratably as compensation expense over the applicable vesting period. The following summarizes the status of Restricted Stock and changes during the years ended December 31: 2015 2014 2013 Number Wtd. Avg. Number of Shares Wtd. Avg. Grant Date Fair Value Number of Shares Wtd. Avg. Unvested - beginning of year 104,068 $ 10.79 98,281 $ 8.91 139,730 $ 6.77 Granted 56,662 24.39 81,763 12.04 63,876 9.32 Vested (46,629 ) 11.82 (75,976 ) 10.03 (91,573 ) 5.95 Forfeited (1,194 ) 24.39 — — (13,752 ) 8.74 Unvested - end of year 112,907 $ 16.86 104,068 $ 10.79 98,281 $ 8.91 At December 31, 2015 and 2014 , there was $1,263,000 and $ 775,000 , respectively, of total unrecognized compensation expense related to Restricted Stock granted under the 2006 Plan. That cost is expected to be recognized over the weighted-average period of 1.6 years. Total compensation expense related to restricted stock grants for the years ended December 31, 2015 , 2014 and 2013 was $ 785,000 , $ 744,000 and $ 408,000 , respectively, and is recorded as selling, general and administrative expense. Compensation expense for restricted stock is recorded at the fair market value at the time of the grant over vesting period of the restricted stock grant. The Company does not receive a tax deduction for restricted stock until the restricted stock vests. The tax deduction for restricted stock is based on the fair market value on the vesting date. Tax benefits received for vested restricted stock in excess of the fair market value at grant date amounted to $202,000 , $ 84,000 and $ 109,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively. During 2015 and 2014 , employees surrendered 12,141 and 21,797 shares, respectfully, of the Company's common stock to satisfy income tax withholding obligations in connection with the vesting of restricted stock.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Components of the provision for income taxes are as follows: 2015 2014 2013 Current: Federal - US $ 4,466,000 $ 1,875,000 $ 2,540,000 Federal - Foreign 405,000 453,000 171,000 State and local 18,000 42,000 44,000 4,889,000 2,370,000 2,755,000 Deferred: Federal 1,143,000 2,423,000 496,000 Federal- Foreign 27,000 (29,000 ) (240,000 ) State and local 59,000 127,000 23,000 1,229,000 2,521,000 279,000 Provision for income taxes $ 6,118,000 $ 4,891,000 $ 3,034,000 A reconciliation of the income tax provision based on the federal statutory income tax rate of 34% to the Company's income tax provision for the years ended December 31 is as follows: 2015 2014 2013 Provision at federal statutory rate - US $ 6,177,000 $ 4,938,000 $ 3,366,000 Effect of Mexican tax law change — — (240,000 ) Effect of foreign taxes (84,000 ) (115,000 ) (192,000 ) Disqualified stock options (5,000 ) (84,000 ) — State and local tax expense, net of federal benefit 76,000 170,000 44,000 Other (46,000 ) (18,000 ) 56,000 Provision for income taxes $ 6,118,000 $ 4,891,000 $ 3,034,000 In December 2013, Mexican legislature approved tax reform that became effective for tax years beginning January 1, 2014. The new tax reform eliminated the Mexican IETU (Flat Rate Business Tax), under which the Company has historically been taxed. As a result of the approved tax reform in Mexico, the Company will now be subject to taxation under Mexico's income tax regime. Accordingly, during the fourth quarter of 2013, the Company recorded a net deferred tax asset on its balance sheet and a credit to deferred tax expense of $240,000 for net deductions expected to be realized in future years as a result of this Mexican tax reform. Certain tax benefits related to incentive stock options and vesting of restricted stock totaled $211,000 , $395,000 and $409,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively. The Company performs analyses to evaluate the balance of deferred tax assets that will be realized. Such analyses are based on the premise that the Company is, and will continue to be, a going concern and that it is more likely than not that deferred tax benefits will be realized through the generation of future taxable income. Based on the analyses, the Company has not realized a valuation allowance on the deferred tax assets as of December 31, 2015 and 2014 . Deferred tax assets consist of the following at December 31: 2015 2014 Current asset (liability): Accrued liabilities $ 820,000 $ 808,000 Accounts receivable 202,000 484,000 Inventory 698,000 680,000 Other, net (122,000 ) (104,000 ) Total current asset 1,598,000 1,868,000 Non-current asset (liability): Property, plant, and equipment (4,844,000 ) (4,273,000 ) Post retirement benefits 3,350,000 3,419,000 Other, net (758,000 ) (511,000 ) Total non-current asset (liability) (2,252,000 ) (1,365,000 ) Total deferred tax asset (liability) - net $ (654,000 ) $ 503,000 At December 31, 2015 , a provision has not been made for U.S. taxes on accumulated undistributed earnings of approximately $7,319,000 of the Company's Mexican subsidiary that would become payable upon repatriation to the United States. It is the intention of the Company to reinvest all such earnings in operations and facilities outside of the United States. At December 31, 2015 and 2014 the Company had no liability for unrecognized tax benefits under guidance relating to tax uncertainties. The Company does not anticipate that the unrecognized tax benefits will significantly change within the next twelve months. The Company files income tax returns in the U.S. federal jurisdiction, Mexico and various state jurisdictions. The Company is no longer subject to U.S. federal and state income tax examinations by tax authorities for the years before 2012, and no longer subject to Mexican income tax examinations by Mexican authorities for the years before 2009.

Post Retirement Benefits

Post Retirement Benefits	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Post Retirement Benefits	The Company provides post retirement benefits to certain of its United States employees, including contributions to a multi-employer defined benefit pension plan, health care and life insurance benefits, and contributions to three 401(k) defined contribution plans. The Company contributes to a multi-employer defined benefit pension plan for its employees represented by the International Association of Machinists and Aerospace Workers ("IAM") at the Company’s Columbus, Ohio production facility. The Company does not administer this plan and contributions are determined in accordance with provisions of the collective bargaining agreement. The risks of participating in this multi-employer plan are different from a single-employer plan in the following aspects: • Assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers. • If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. • If the Company chooses to stop participating in its multi-employer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability. The Company’s participation in the multi-employer defined benefit pension plan for the years ended December 31, 2015 and 2014 is outlined in the table below. The most recent Pension Protection Act ("PPA") zone status available in 2015 and 2014 is for the plan’s year-end at December 31, 2014 , and December 31, 2013 , respectively. The zone status is based on information the Company received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded. The “FIP/RP Status Pending/Implemented” column indicates whether a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending or has been implemented. Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending/ Implemented Contributions of the Company Surcharge Imposed Expiration Date of Collective Bargaining Agreement 2015 2014 2015 2014 IAM National Pension Fund / National Pension Plan (A) 51-6031295 - 002 Green as of 12/31/14 Green as of 12/31/13 No $863,000 $719,000 No 8/17/2016 Total Contributions: $863,000 $719,000 (A) The National Pension Plan utilized a five year amortization extension in accordance with § 431(d) of the Internal Revenue Code of 1986 ("the Code") to amortize its losses from 2008. The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2014. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.25 per hour from August 13, 2012 through August 10, 2013; $1.30 per hour from August 11, 2013 through August 10, 2014; $1.35 per hour from August 11, 2014 through August 9, 2015; and $1.40 per hour from August 10, 2015 through August 17, 2016. Prior to the acquisition of Columbus Plastics, certain of the Company's employees were participants, or were eligible to participate, in Navistar's post retirement health and life insurance benefit plan. This plan provides healthcare and life insurance benefits for certain employees upon their retirement, along with their spouses and certain dependents and requires cost sharing between the Company, Navistar and the participants, in the form of premiums, co-payments, and deductibles. The Company and Navistar share the cost of benefits for these employees, using a formula that allocates the cost based upon the respective portion of time that the employee was an active service participant after the acquisition of Columbus Plastics to the period of active service prior to the acquisition of Columbus Plastics. The Company also sponsors a post retirement health and life insurance benefit plan for certain union retirees of its Columbus, Ohio production facility. In August 2010, as part of a new collective-bargaining agreement, the post retirement health and life insurance benefits for all current and future represented employees who were not retired were eliminated in exchange for a one-time cash payment. Individuals who retired prior to August 2010 remain eligible for post retirement health and life insurance benefits. The elimination of post retirement health and life insurance benefits described above resulted in a reduction of the Company’s post retirement benefits liability of approximately $10,282,000 in 2010. This reduction in post retirement benefits liability was treated as a negative plan amendment and is being amortized as a reduction to net periodic benefit cost over approximately twenty years, the actuarial life expectancy of the remaining participants in the plan at the time of the amendment. This negative plan amendment resulted in net periodic benefit cost reductions of approximately $496,000 in 2015 , 2014 and 2013 , and will result in net periodic benefit cost reductions of approximately $496,000 in 2016 and each year thereafter during the amortization period. The funded status of the Company's post retirement health and life insurance benefits plan as of December 31, 2015 and 2014 and reconciliation with the amounts recognized in the consolidated balance sheets are provided below. Post Retirement Benefits 2015 2014 Change in benefit obligation: Benefit obligation at January 1 $ 9,172,000 $ 6,774,000 Interest cost 316,000 277,000 Unrecognized (gain) loss (48,000 ) 2,726,000 Benefits paid (434,000 ) (605,000 ) Benefit obligation at December 31 $ 9,006,000 $ 9,172,000 Plan Assets — — Amounts recorded in accumulated other comprehensive income: Prior service credit $ (7,594,000 ) $ (8,090,000 ) Net loss 3,939,000 4,156,000 Total $ (3,655,000 ) $ (3,934,000 ) Weighted-average assumptions as of December 31: Discount rate used to determine benefit obligation and net periodic benefit cost 4.1 % 3.8 % The components of expense for all of the Company's post retirement benefit plans for the years ended December 31: 2015 2014 2013 Pension expense: Multi-employer plan $ 863,000 $ 719,000 $ 464,000 Defined contribution plans 836,000 701,000 571,000 Total pension expense 1,699,000 1,420,000 1,035,000 Health and life insurance: Interest cost 316,000 277,000 332,000 Amortization of prior service costs (496,000 ) (496,000 ) (496,000 ) Amortization of net loss 169,000 47,000 201,000 Net periodic benefit cost (11,000 ) (172,000 ) 37,000 Total post retirement benefits expense $ 1,688,000 $ 1,248,000 $ 1,072,000 The Company accounts for post retirement benefits under FASB ASC 715, which requires the recognition of the funded status of a defined benefit pension or post retirement plan in the consolidated balance sheets. For the year ended December 31, 2015 , the Company recognized a net actuarial gain of $ 48,000 in other comprehensive gain . For the year ended December 31, 2014 , the Company recognized a net actuarial loss of $ 2,726,000 in other comprehensive loss . Amounts not yet recognized as a component of net periodic benefit costs at December 31, 2015 and 2014 were a net credit of $ 3,655,000 and $ 3,934,000 , respectively. The amount in accumulated other comprehensive income expected to be recognized as components of net periodic post retirement cost during 2016 consists of a prior service credit of $ 496,000 , and a net loss of $ 155,000 . In addition, 2016 interest expense related to post retirement healthcare is expected to be $ 323,000 , for a total post retirement healthcare net gain of approximately $ 18,000 in 2016 . The Company expects benefits paid in 2016 to be consistent with estimated future benefit payments as shown in the table below. The weighted average rate of increase in the per capita cost of covered health care benefits is projected to be 6% . The rate is projected to decrease gradually to 5% by the year 2021 and remain at that level thereafter. The comparable assumptions for the prior year were 7% and 5% , respectively. The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows: 1- Percentage Point Increase 1-Percentage Point Decrease Effect on total of service and interest cost components $ 40,000 $ (47,000 ) Effect on post retirement benefit obligation $ 1,028,000 $ (1,227,000 ) The estimated future benefit payments of the health care plan are as follows: Year Postretirement Health Care Benefits Plan 2016 $ 1,060,000 2017 392,000 2018 370,000 2019 368,000 2020 381,000 2021-2025 2,144,000

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In 1996, the Company acquired substantially all of the assets and liabilities of the Columbus Plastics unit from Navistar, in return for a secured note, which has been repaid, and 4,264,000 shares of Common Stock of the Company. On July 18, 2007, the Company entered into a stock repurchase agreement with Navistar, pursuant to which the Company repurchased 3,600,000 shares of common stock from Navistar. On August 16, 2013, Navistar sold its remaining 664,000 shares in a series of open market sales.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, the Company is involved in litigation incidental to the conduct of its business. However, the Company is presently not involved in any legal proceedings which in the opinion of management are likely to have a material adverse effect on the Company's consolidated financial position or results of operations.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company holds certain financial instruments, which are recognized and disclosed at fair value in the financial statements on a recurring basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in a transaction between market participants as of the measurement date. Fair value is measured using the fair value hierarchy and related valuation methodologies as defined in the authoritative literature. This guidance provides a fair value framework that requires the categorization of assets and liabilities into three levels based upon the assumptions (inputs) used to price the assets or liabilities. Level 1 provides the most reliable measure of fair value, whereas Level 3 generally requires significant management judgment. The three levels are defined as follows: Level 1 - Quoted prices in active markets for identical assets and liabilities. Level 2 - Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets. Level 3 - Significant unobservable inputs reflecting management's own assumptions about the inputs used in pricing the asset or liability. The Company’s financial instruments consist of long-term debt, interest rate swaps, accounts receivable, and accounts payable. The carrying amount of these financial instruments approximated their fair value. The Company's only two Level 2 fair value instrument relates to interest rate swaps. The Company utilizes interest rate swap contracts to manage its targeted mix of fixed and floating rate debt, and these swaps are valued using observable benchmark rates at commonly quoted intervals for the full term of the swaps (market approach). These interest rate swaps are discussed in detail in Note 9. The following table presents financial liabilities measured and recorded at fair value on the Company’s Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy as of December 31, 2015 and December 31, 2014 : Core Molding Technologies' derivative instruments included on the Consolidated Balance Sheets were as follows: Balance Sheet Location December 31, 2015 Fair Value December 31, 2014 Fair Value Derivatives not designated as hedging instruments Interest rate risk activities Interest rate swaps $ 2,000 $ 37,000 At December 31, 2015 the Company's assets measured at fair value on a non-recurring basis related to the acquisition of substantially all of the assets of CPI, as disclosed in Note 7. The effect of derivative instruments on the Consolidated Statements of Income was as follows: Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivative Amount of Realized/Unrealized Gain (Loss) Recognized in Income on Derivatives Year ended December 31, December 31, December 31, Interest rate swaps Interest expense $ 14,000 $ 46,000 $ 73,000 During 2015 and 2014 , the Company did not reclassify any amounts related to its cash flow hedges from accumulated other comprehensive income (loss) to earnings due to the probability that certain forecasted transactions would not occur. As discussed in Note 9, the Company discontinued the use of hedge accounting for its interest rate swaps. The Company now records all mark to market adjustments related to these interest rate swaps within interest expense in the Company’s Consolidated Statements of Income. It is anticipated that during the next twelve months the expiration and settlement of cash flow hedge contracts along with the loss amortization on its remaining discontinued hedge will result in income statement recognition of amounts currently classified in accumulated other comprehensive loss of approximately $5,000 , or $2,000 net of taxes.

AOCI (Notes)

AOCI (Notes)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income	16. Accumulated Other Comprehensive Income The following table presents changes in Accumulated Other Comprehensive Income by component, net of tax, for the years ended December 31, 2015 and 2014 : Losses on Interest Rate Swaps (A) Post Retirement Benefit Plan Items (B) Total 2014: Balance at January 1, 2014 $ (30,000 ) $ 4,902,000 $ 4,872,000 Other comprehensive income before reclassifications — (2,726,000 ) (2,726,000 ) Amounts reclassified from accumulated other comprehensive income 21,000 (449,000 ) (428,000 ) Income tax (expense) benefit (7,000 ) 1,119,000 1,112,000 Balance at December 31, 2014 $ (16,000 ) $ 2,846,000 $ 2,830,000 2015: Balance at December 31, 2014 $ (16,000 ) $ 2,846,000 $ 2,830,000 Other comprehensive income before reclassifications — 48,000 48,000 Amounts reclassified from accumulated other comprehensive income 21,000 (327,000 ) (306,000 ) Income tax (expense) benefit (8,000 ) 81,000 73,000 Balance at December 31, 2015 $ (3,000 ) $ 2,648,000 $ 2,645,000 (A) The losses on interest rate swaps reclassified from Accumulated Other Comprehensive Income is included in interest expense on the Consolidated Statements of Income. The tax effect of losses on interest rate swaps reclassified from Accumulated Other Comprehensive Income is included in income tax expense on the Consolidated Statements of Income. (B) The effect of post retirement benefit items reclassified from Accumulated Other Comprehensive Income is included in total cost of sales on the Consolidated Statements of Income. These Accumulated Other Comprehensive Income components are included in the computation of net periodic benefit cost (see Note 12 Post Retirement Benefits for additional details). The tax effect of post retirement benefit items reclassified from Accumulated Other Comprehensive Income is included in income tax expense on the Consolidated Statements of Income.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2015 , 2014 and 2013 . 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Year 2015: Product sales $ 47,854,000 $ 53,514,000 $ 44,243,000 $ 43,492,000 $ 189,103,000 Tooling sales 1,745,000 1,342,000 3,806,000 3,072,000 9,965,000 Net sales 49,599,000 54,856,000 48,049,000 46,564,000 199,068,000 Gross margin 9,025,000 10,982,000 8,311,000 7,934,000 36,252,000 Income before interest and taxes 4,890,000 6,232,000 3,902,000 3,474,000 18,498,000 Net income 3,196,000 4,039,000 2,484,000 2,331,000 12,050,000 Net income per common share: Basic (1) $ 0.42 $ 0.53 $ 0.33 $ 0.31 $ 1.59 Diluted (1) $ 0.42 $ 0.53 $ 0.33 $ 0.31 $ 1.58 2014: Product sales $ 40,664,000 $ 43,317,000 $ 43,171,000 $ 42,592,000 $ 169,744,000 Tooling sales 411,000 2,807,000 420,000 1,822,000 5,460,000 Net sales 41,075,000 46,124,000 43,591,000 44,414,000 175,204,000 Gross margin 6,645,000 7,599,000 8,147,000 7,795,000 30,186,000 Income before interest and taxes 3,116,000 3,873,000 3,704,000 3,954,000 14,647,000 Net income 2,120,000 2,520,000 2,428,000 2,566,000 9,634,000 Net income per common share: Basic (1) $ 0.29 $ 0.34 $ 0.32 $ 0.34 $ 1.28 Diluted (1) $ 0.28 $ 0.33 $ 0.32 $ 0.34 $ 1.28 2013: Product sales $ 32,858,000 $ 32,146,000 $ 32,342,000 $ 36,750,000 $ 134,096,000 Tooling sales 1,504,000 2,535,000 5,092,000 898,000 10,029,000 Net sales 34,362,000 34,681,000 37,434,000 37,648,000 144,125,000 Gross margin 5,890,000 5,989,000 6,370,000 5,325,000 23,574,000 Income before interest and taxes 2,617,000 2,500,000 2,948,000 2,049,000 10,114,000 Net income 1,681,000 1,589,000 1,960,000 1,636,000 6,866,000 Net income per common share: Basic (1) $ 0.24 $ 0.22 $ 0.27 $ 0.22 $ 0.95 Diluted (1) $ 0.23 $ 0.21 $ 0.26 $ 0.22 $ 0.92 (1) Sum of the quarters may not sum to total year due to rounding.

Schedule II (Notes)

Schedule II (Notes)	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule II	Core Molding Technologies, Inc. and Subsidiaries Schedule II Consolidated valuation and qualifying accounts and reserves for the years ended December 31, 2015 and 2014 . Reserves deducted from asset to which it applies — allowance for doubtful accounts. Additions Balance at Beginning of Year (Recovered)/Charged to Costs & Expenses Charged to Other Accounts Deductions (A) Balance at End of Year Year Ended December 31, 2015 $ 289,000 $ (159,000 ) $ — $ 90,000 $ 40,000 Year Ended December 31, 2014 $ 141,000 $ 197,000 $ — $ 49,000 $ 289,000 Year Ended December 31, 2013 $ 258,000 $ 51,000 $ — $ 168,000 $ 141,000 (A) Amount represents uncollectible accounts written off.

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and reported amounts of revenues and expenses during the reporting period. Significant estimates relate to allowances for doubtful accounts, inventory reserves, self-insurance reserves related to healthcare and workers compensation, deferred taxes, post retirement benefits, goodwill and long-lived assets. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition - Revenue from product sales is recognized at the time products are shipped and title transfers. Allowances for returned products and other credits are estimated and recorded as revenue is recognized. Tooling revenue is recognized when the customer approves the tool and accepts ownership. Progress billings and expenses are shown net as an asset or liability on the Company’s Consolidated Balance Sheet. Tooling in progress can fluctuate significantly from period to period and is dependent upon the stage of tooling projects and the related billing and expense payment timetable for individual projects and therefore does not necessarily reflect projected income or loss from tooling projects. At December 31, 2015 , the Company had a net liability related to tooling in progress of $ 2,271,000 , which represents approximately $21,967,000 of progress tooling billings and $19,696,000 of progress tooling expenses. At December 31, 2014 , the Company had a net liability related to tooling in progress of $ 8,068,000 which represents approximately $10,407,000 of progress tooling billings and $2,339,000 of progress tooling expenses.
Cash and Cash Equivalents	Cash and Cash Equivalents - The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash is held primarily in one bank. The Company had cash on hand of $8,943,000 at December 31, 2015 and $2,312,000 at December 31, 2014 .
Accounts Receivable Allowances	Accounts Receivable Allowances - Management maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. The Company recorded an allowance for doubtful accounts of $ 40,000 at December 31, 2015 and $ 289,000 December 31, 2014 . Management also records estimates for customer returns and deductions, discounts offered to customers, and for price adjustments. Should customer returns and deductions, discounts, and price adjustments fluctuate from the estimated amounts, additional allowances may be required. The Company had an allowance for estimated chargebacks of $523,000 at December 31, 2015 and $813,000 at December 31, 2014 . There have been no material changes in the methodology of these calculations.
Inventories	Inventories - Inventories, which include material, labor and manufacturing overhead, are valued at the lower of cost or market. The inventories are accounted for using the first-in, first-out (FIFO) method of determining inventory costs. Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage. The Company has recorded an allowance for slow moving and obsolete inventory of $863,000 at December 31, 2015 and $940,000 at December 31, 2014 .
Principles of Consolidation	Principles of Consolidation - The accompanying consolidated financial statements include the accounts of all subsidiaries after elimination of all intercompany accounts, transactions, and profits.
Property, Plant and Equipment	Property, Plant, and Equipment - Property, plant, and equipment are recorded at cost. Depreciation is provided on a straight-line method over the estimated useful lives of the assets. The carrying amount of long‑lived assets is evaluated annually to determine if adjustment to the depreciation period or to the unamortized balance is warranted. Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Depreciation expense was $5,955,000 , $5,009,000 and $4,783,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively. The Company capitalized interest costs of approximately $2,000 and $80,000 for the years ended December 31, 2015 and 2014 , respectively.
Long-Lived Assets	Long-Lived Assets - Long-lived assets consist primarily of property, plant and equipment and definite-lived intangibles. The Company acquired substantially all of the assets of CPI on March 20, 2015, which resulted in approximately $650,000 of definite-lived intangibles and $12,474,000 of property, plant and equipment, all of which were recorded at fair value. The recoverability of long-lived assets is evaluated by an analysis of operating results and consideration of other significant events or changes in the business environment. The Company evaluates whether impairment exists for long-lived assets on the basis of undiscounted expected future cash flows from operations before interest. There was no impairment of the Company's long-lived assets for the years ended December 31, 2015 , 2014 and 2013 .
Goodwill	Goodwill - The Company has recorded $ 2,403,000 of goodwill as a result of two acquisitions. In 2001, the Company acquired certain assets of Airshield Corporation, and as a result, recorded goodwill in the amount of $1,097,000 . The Company also acquired substantially all of the assets of CPI on March 20, 2015, which resulted in approximately $1,306,000 of goodwill. The Company evaluates goodwill annually on December 31 st to determine whether impairment exists, or at interim periods if an indicator of possible impairment exists. The Company evaluates goodwill for impairment utilizing the one-step qualitative assessment. We consider relevant events and circumstances that affect the fair value or carrying amount of the Company. Such events and circumstances could include macroeconomic conditions, industry and market conditions, cost factors, overall financial performance, entity specific events and capital markets pricing. The Company places more weight on the events and circumstances that most affect the Company's fair value or carrying amount. These factors are all considered by management in reaching its conclusion about whether to perform the first step of the impairment test. If the Company's carrying amount is determined to be more likely than not impaired based on the one-step qualitative approach, a quantitative valuation to estimate the fair value of the Company is performed. Fair value measurements are based on a projected discounted cash flow valuation model, in accordance with ASC 350, “Intangibles-Goodwill and Other.” There was no impairment of the Company's goodwill for the years ended December 31, 2015 , 2014 and 2013 .
Income Taxes	Income Taxes - The Company records deferred income taxes for differences between the financial reporting basis and income tax basis of assets and liabilities. A detailed breakout is located in Note 11.
Self-Insurance	Self-Insurance - The Company is self-insured with respect to its Columbus and Batavia, Ohio, Gaffney, South Carolina and Brownsville, Texas medical, dental and vision claims and Columbus and Batavia, Ohio workers’ compensation claims, all of which are subject to stop-loss insurance thresholds. The Company has recorded an estimated liability for self-insured medical, dental and vision claims incurred but not reported and worker’s compensation claims incurred but not reported at December 31, 2015 and December 31, 2014 of $ 1,074,000 and $1,165,000 , respectively.
Post Retirement Benefits	Post Retirement Benefits - Management records an accrual for post retirement costs associated with the health care plan sponsored by the Company for certain employees. Should actual results differ from the assumptions used to determine the reserves, additional provisions may be required. In particular, increases in future healthcare costs above the assumptions could have an adverse effect on the Company's operations. The effect of a change in healthcare costs is described in Note 12 of the Notes to Consolidated Financial Statements. Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarially computed estimates of $ 9,006,000 at December 31, 2015 and $ 9,172,000 at December 31, 2014 .
Fair Value of Financial Instruments	Fair Value of Financial Instruments - The Company's financial instruments consist of long-term debt, interest rate swaps, accounts receivable, and accounts payable. The carrying amount of these financial instruments approximated their fair value.
Concentration Risk	Concentration Risks - The Company has concentration risk related to significant amounts of sales and accounts receivable with certain customers. Sales to four major customers comprised 82% , 87% and 86% of total sales in 2015 , 2014 and 2013 , respectively (see Note 4). Concentrations of accounts receivable balances with four customers accounted for 88% and 90% of accounts receivable at December 31, 2015 and 2014 , respectively. The Company performs ongoing credit evaluations of its customers' financial condition. The Company maintains reserves for potential bad debt losses, and such bad debt losses have been historically within the Company's expectations. Sales to certain customers' manufacturing and service locations in Mexico and Canada totaled 35% , 30% and 34% of total sales for 2015 , 2014 and 2013 , respectively. As of December 31, 2015 , the Company employed a total of 1,525 employees, which consisted of 685 employees in its United States operations and 840 employees in its Mexican operations. Of these 1,525 employees, 293 are covered by a collective bargaining agreement with the International Association of Machinists and Aerospace Workers (“IAM”), which extends to August 7, 2016, and 731 are covered by a collective bargaining agreement with Sindicato de Jorneleros y Obreros, which extends to January 16, 2017.
Earnings Per Common Share	Earnings Per Common Share - Basic earnings per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted earnings per common share are computed similarly but include the effect of the assumed exercise of dilutive stock options and vesting of restricted stock under the treasury stock method. A detailed computation of earnings per share is located in Note 3.
Research and Development	Research and Development - Research and development activities focus on developing new material formulations, new products, new production capabilities and processes, and improving existing products and manufacturing processes. The Company does not maintain a separate research and development organization or facility, but uses its production equipment, as necessary, to support these efforts and cooperates with its customers and its suppliers in research and development efforts. Likewise, manpower to direct and advance research and development is integrated with the existing manufacturing, engineering, production, and quality organizations. Research and development costs, which are expensed as incurred, totaled approximately $ 719,000 , $475,000 and $466,000 in 2015 , 2014 and 2013 .
Foreign Currency Adjustments	Foreign Currency Adjustments - In conjunction with the Company's acquisition of certain assets of Airshield Corporation, the Company established operations in Mexico. The functional currency for the Mexican operations is the United States dollar. All foreign currency asset and liability amounts are remeasured into United States dollars at end-of-period exchange rates. Income statement accounts are translated at the weighted monthly average rates. Gains and losses resulting from translation of foreign currency financial statements into United States dollars and gains and losses resulting from foreign currency transactions are included in current results of operations. Net foreign currency translation and transaction activity is included in selling, general and administrative expense. This activity resulted in a gain of $ 54,000 in 2015 and losses of $ 108,000 and $ 27,000 in 2014 and 2013 , respectively.
Recent Accounting Pronouncements	Recent Accounting Pronouncements - In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition. ASU Topic 606 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The effective date for ASU Topic 606 has been delayed until the first quarter of fiscal year 2018 using one of two retrospective application methods. The Company is currently assessing the transition alternatives and potential impact the pronouncement and adoption of ASU Topic 606 will have on the Company’s financial statements. Early adoption is permitted, but not before annual periods beginning after December 15, 2016. In August 2014, the FASB issued Accounting Standards Update No. 2014-15, "Presentation of Financial Statements-Going Concern (Topic 205-40)" ("ASU 2014-15"). Under the standard, management is required to evaluate for each annual and interim reporting period whether it is probable that the entity will not be able to meet its obligations as they become due within one year after the date that financial statements are issued. ASU 2014-15 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2017. The Company does not believe that the pronouncement will have an impact on the Company's financial statements. In February 2015, the FASB issued ASU No. 2015-03, "Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ("ASU 2015-03"). Under the standard, debt issuance costs are required to be recorded as a direct reduction of the debt liability on the balance sheet rather than as an asset. The standard is effective for the Company as of January 1, 2016 and is not expected to significantly impact the Company's financial statements. In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. The amendments in this guidance do not apply to inventory that is measured using last-in, first-out (LIFO) or the retail inventory method. The amendments apply to all other inventory, which includes inventory that is measured using first-in, first-out or average cost. Within the scope of this new guidance, an entity should measure inventory at the lower of cost and net realizable value; where, net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The new guidance is effective for annual periods beginning after December 15, 2016, with early adoption permitted. The new guidance must be applied on a prospective basis. The Company does not believe that the pronouncement will have a material impact on the Company's financial statements. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations: Simplifying the Accounting for Measurement-Period Adjustments, which is an accounting standards update with new guidance that eliminates the requirement in a business combination to restate prior period financial statements for measurement period adjustments. Instead, measurement period adjustments will be recognized in the reporting period in which the adjustment is identified. The standards update is effective for fiscal years and interim periods beginning after December 15, 2015. The amendments should be applied prospectively to measurement period adjustments that occur after the effective date of this update with early adoption permitted for financial statements that have not been issued. We will adopt this standard update as required and recognize any such future adjustments accordingly. In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes (Topic 740). This update requires all deferred tax assets and liabilities, and any related valuation allowance, to be classified as noncurrent on the balance sheet. The ASU simplifies the current standard, which requires entities to separately present deferred tax assets and liabilities as current and noncurrent in a classified balance sheet. The ASU is effective for annual reporting periods beginning on or after December 15, 2016, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual reporting period. The Company will adopt this standards update as required and does not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842). This update requires organizations to recognize lease assets and lease liabilities on the balance sheet and also disclose key information about leasing arrangements. This ASU is effective for annual reporting periods beginning on or after December 15, 2018, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual period. The Company will adopt this standards update as required and does not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Components of property, plant and equipment	Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Property, plant, and equipment consisted of the following at December 31: 2015 2014 Land and land improvements $ 5,958,000 $ 5,098,000 Buildings 41,417,000 37,143,000 Machinery and equipment 87,482,000 75,905,000 Tools, dies, and patterns 808,000 808,000 Additions in progress 2,331,000 979,000 Total 137,996,000 119,933,000 Less accumulated depreciation (63,893,000 ) (57,938,000 ) Property, plant, and equipment - net $ 74,103,000 $ 61,995,000

Net Income per Common Share (Ta

Net Income per Common Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Computation of basic and diluted net income per common share	The computation of basic and diluted net income per common share is as follows: December 31, 2015 2014 2013 Net income $ 12,050,000 $ 9,634,000 $ 6,866,000 Weighted average common shares outstanding — basic 7,583,000 7,508,000 7,220,000 Effect of dilutive securities 40,000 45,000 215,000 Weighted average common and potentially issuable common shares outstanding — diluted 7,623,000 7,553,000 7,435,000 Basic net income per common share $ 1.59 $ 1.28 $ 0.95 Diluted net income per common share $ 1.58 $ 1.28 $ 0.92

Major Customers (Tables)

Major Customers (Tables)	12 Months Ended
	Dec. 31, 2015
Revenue, Net [Abstract]
Major customers	The following table presents sales revenue for the above-mentioned customers for the years ended December 31: 2015 2014 2013 Navistar product sales $ 50,169,000 $ 51,254,000 $ 46,384,000 Navistar tooling sales 6,246,000 76,000 972,000 Total Navistar sales 56,415,000 51,330,000 47,356,000 Volvo product sales 53,525,000 46,340,000 11,508,000 Volvo tooling sales 1,600,000 2,519,000 936,000 Total Volvo sales 55,125,000 48,859,000 12,444,000 PACCAR product sales 33,452,000 35,602,000 42,784,000 PACCAR tooling sales 978,000 526,000 7,370,000 Total PACCAR sales 34,430,000 36,128,000 50,154,000 Yamaha product sales 16,766,000 16,911,000 13,648,000 Yamaha tooling sales — — — Total Yamaha sales 16,766,000 16,911,000 13,648,000 Other product sales 35,191,000 19,637,000 19,772,000 Other tooling sales 1,141,000 2,339,000 751,000 Total other sales 36,332,000 21,976,000 20,523,000 Total product sales 189,103,000 169,744,000 134,096,000 Total tooling sales 9,965,000 5,460,000 10,029,000 Total sales $ 199,068,000 $ 175,204,000 $ 144,125,000

Foreign Operations (Tables)

Foreign Operations (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Sales and property and equipment, net by country	The following table provides information related to sales by country, based on the ship to location of customers' production facilities, for the years ended December 31: 2015 2014 2013 United States $ 129,651,000 $ 123,317,000 $ 95,063,000 Mexico 63,586,000 47,772,000 45,069,000 Canada 5,831,000 4,115,000 3,993,000 Total $ 199,068,000 $ 175,204,000 $ 144,125,000 The following table provides information related to the location of property, plant and equipment, net, as of December 31: 2015 2014 United States $ 44,191,000 $ 31,674,000 Mexico 29,912,000 30,321,000 Total $ 74,103,000 $ 61,995,000

Property, Plant & Equipment (Ta

Property, Plant & Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Components of property, plant and equipment	Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Property, plant, and equipment consisted of the following at December 31: 2015 2014 Land and land improvements $ 5,958,000 $ 5,098,000 Buildings 41,417,000 37,143,000 Machinery and equipment 87,482,000 75,905,000 Tools, dies, and patterns 808,000 808,000 Additions in progress 2,331,000 979,000 Total 137,996,000 119,933,000 Less accumulated depreciation (63,893,000 ) (57,938,000 ) Property, plant, and equipment - net $ 74,103,000 $ 61,995,000

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Accounts Receivable $ 1,615,000 Inventory 675,000 Other Current Assets 171,000 Property and Equipment 12,474,000 Intangibles 650,000 Goodwill 1,306,000 Accounts Payable (2,277,000 ) Other Current Liabilities (102,000 ) $ 14,512,000

Goodwill and Intangible Asset34

Goodwill and Intangible Asset Disclosure (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Balance at December 31, 2014 $ 1,097,000 Additions 1,306,000 Impairment — Balance at December 31, 2015 $ 2,403,000
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]	Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (7,000 ) $ 243,000 Customer Relationships 10 Years 400,000 (30,000 ) 370,000 $ 650,000 $ (37,000 ) $ 613,000

Debt and Leases (Tables)

Debt and Leases (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Components of long-term debt	Long-term debt consists of the following at: December 31, December 31, Capex loan payable to a bank, interest at a variable rate (2.04% and 1.76% at December 31, 2015 and 2014, respectively) with monthly payments of interest and principal over a seven-year period through May 2016. $ 714,000 $ 2,428,000 Term loan payable to a bank, interest at a variable rate (2.24% at December 31, 2015) with monthly payments of interest and principal through March 2020. 12,750,000 — Revolving Line of Credit — 2,768,000 Total 13,464,000 5,196,000 Less current portion (3,714,000 ) (4,482,000 ) Long-term debt $ 9,750,000 $ 714,000
Maturities of long-term debt	Annual maturities of long-term debt are as follows: 2016 $ 3,714,000 2017 3,000,000 2018 3,000,000 2019 3,000,000 2020 750,000 Thereafter — Total $ 13,464,000
Future minimum rental payments for operating leases	Future minimum operating lease payments are as follows: 2016 $ 539,000 2017 486,000 2018 328,000 2019 192,000 Thereafter — Total minimum lease payments $ 1,545,000

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Employee Stock Option [Member]
Stock based compensation:
Activity relating to stock options	The following summarizes the activity relating to stock options under the plans mentioned above for the years ended December 31: 2015 2014 2013 Number Wtd. Avg. Number of Options Wtd. Avg. Exercise Price Number of Options Wtd. Avg. Outstanding - beginning of year 3,000 $ 6.40 227,750 $ 3.57 374,875 $ 3.37 Granted — — — — — — Exercised (3,000 ) 6.40 (224,750 ) 3.53 (132,725 ) 3.09 Forfeited — — — — (14,400 ) 2.75 Outstanding - end of year — $ — 3,000 $ 6.40 227,750 $ 3.57 Exercisable at December 31 — $ — 3,000 $ 6.40 227,750 $ 3.57 Vested or expected to vest at December 31 — $ — 3,000 $ 6.40 227,750 $ 3.57
Unvested stock options
Stock based compensation:
Information about stock options outstanding and exercisable	The following summarizes the status of, and changes to, unvested options during the years ended December 31: Number of Options Wtd. Avg. Unvested at January 1, 2013 14,400 $ 2.75 Granted — — Vested — — Forfeited (14,400 ) 2.75 Unvested at December 31, 2013 — —
Restricted stock
Stock based compensation:
Status and changes of restricted stock	The following summarizes the status of Restricted Stock and changes during the years ended December 31: 2015 2014 2013 Number Wtd. Avg. Number of Shares Wtd. Avg. Grant Date Fair Value Number of Shares Wtd. Avg. Unvested - beginning of year 104,068 $ 10.79 98,281 $ 8.91 139,730 $ 6.77 Granted 56,662 24.39 81,763 12.04 63,876 9.32 Vested (46,629 ) 11.82 (75,976 ) 10.03 (91,573 ) 5.95 Forfeited (1,194 ) 24.39 — — (13,752 ) 8.74 Unvested - end of year 112,907 $ 16.86 104,068 $ 10.79 98,281 $ 8.91

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Components of provision for income taxes	Components of the provision for income taxes are as follows: 2015 2014 2013 Current: Federal - US $ 4,466,000 $ 1,875,000 $ 2,540,000 Federal - Foreign 405,000 453,000 171,000 State and local 18,000 42,000 44,000 4,889,000 2,370,000 2,755,000 Deferred: Federal 1,143,000 2,423,000 496,000 Federal- Foreign 27,000 (29,000 ) (240,000 ) State and local 59,000 127,000 23,000 1,229,000 2,521,000 279,000 Provision for income taxes $ 6,118,000 $ 4,891,000 $ 3,034,000
Reconciliation of income tax provision	A reconciliation of the income tax provision based on the federal statutory income tax rate of 34% to the Company's income tax provision for the years ended December 31 is as follows: 2015 2014 2013 Provision at federal statutory rate - US $ 6,177,000 $ 4,938,000 $ 3,366,000 Effect of Mexican tax law change — — (240,000 ) Effect of foreign taxes (84,000 ) (115,000 ) (192,000 ) Disqualified stock options (5,000 ) (84,000 ) — State and local tax expense, net of federal benefit 76,000 170,000 44,000 Other (46,000 ) (18,000 ) 56,000 Provision for income taxes $ 6,118,000 $ 4,891,000 $ 3,034,000
Components of deferred tax assets	Deferred tax assets consist of the following at December 31: 2015 2014 Current asset (liability): Accrued liabilities $ 820,000 $ 808,000 Accounts receivable 202,000 484,000 Inventory 698,000 680,000 Other, net (122,000 ) (104,000 ) Total current asset 1,598,000 1,868,000 Non-current asset (liability): Property, plant, and equipment (4,844,000 ) (4,273,000 ) Post retirement benefits 3,350,000 3,419,000 Other, net (758,000 ) (511,000 ) Total non-current asset (liability) (2,252,000 ) (1,365,000 ) Total deferred tax asset (liability) - net $ (654,000 ) $ 503,000

Post Retirement Benefits (Table

Post Retirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Components of multiemployer plans	Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending/ Implemented Contributions of the Company Surcharge Imposed Expiration Date of Collective Bargaining Agreement 2015 2014 2015 2014 IAM National Pension Fund / National Pension Plan (A) 51-6031295 - 002 Green as of 12/31/14 Green as of 12/31/13 No $863,000 $719,000 No 8/17/2016 Total Contributions: $863,000 $719,000 (A) The National Pension Plan utilized a five year amortization extension in accordance with § 431(d) of the Internal Revenue Code of 1986 ("the Code") to amortize its losses from 2008. The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2014. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.25 per hour from August 13, 2012 through August 10, 2013; $1.30 per hour from August 11, 2013 through August 10, 2014; $1.35 per hour from August 11, 2014 through August 9, 2015; and $1.40 per hour from August 10, 2015 through August 17, 2016.
Reconciliation of changes in benefit obligation, amounts included in AOCI and assumptions used	The funded status of the Company's post retirement health and life insurance benefits plan as of December 31, 2015 and 2014 and reconciliation with the amounts recognized in the consolidated balance sheets are provided below. Post Retirement Benefits 2015 2014 Change in benefit obligation: Benefit obligation at January 1 $ 9,172,000 $ 6,774,000 Interest cost 316,000 277,000 Unrecognized (gain) loss (48,000 ) 2,726,000 Benefits paid (434,000 ) (605,000 ) Benefit obligation at December 31 $ 9,006,000 $ 9,172,000 Plan Assets — — Amounts recorded in accumulated other comprehensive income: Prior service credit $ (7,594,000 ) $ (8,090,000 ) Net loss 3,939,000 4,156,000 Total $ (3,655,000 ) $ (3,934,000 ) Weighted-average assumptions as of December 31: Discount rate used to determine benefit obligation and net periodic benefit cost 4.1 % 3.8 %
Components of postretirement expense	The components of expense for all of the Company's post retirement benefit plans for the years ended December 31: 2015 2014 2013 Pension expense: Multi-employer plan $ 863,000 $ 719,000 $ 464,000 Defined contribution plans 836,000 701,000 571,000 Total pension expense 1,699,000 1,420,000 1,035,000 Health and life insurance: Interest cost 316,000 277,000 332,000 Amortization of prior service costs (496,000 ) (496,000 ) (496,000 ) Amortization of net loss 169,000 47,000 201,000 Net periodic benefit cost (11,000 ) (172,000 ) 37,000 Total post retirement benefits expense $ 1,688,000 $ 1,248,000 $ 1,072,000
Effect of changing health care cost trend rate	The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows: 1- Percentage Point Increase 1-Percentage Point Decrease Effect on total of service and interest cost components $ 40,000 $ (47,000 ) Effect on post retirement benefit obligation $ 1,028,000 $ (1,227,000 )
Estimated future benefit payments	The estimated future benefit payments of the health care plan are as follows: Year Postretirement Health Care Benefits Plan 2016 $ 1,060,000 2017 392,000 2018 370,000 2019 368,000 2020 381,000 2021-2025 2,144,000

Fair Value of Financial Instr39

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Components of derivative instruments	Core Molding Technologies' derivative instruments included on the Consolidated Balance Sheets were as follows: Balance Sheet Location December 31, 2015 Fair Value December 31, 2014 Fair Value Derivatives not designated as hedging instruments Interest rate risk activities Interest rate swaps $ 2,000 $ 37,000
Effect of derivative instruments on income	The effect of derivative instruments on the Consolidated Statements of Income was as follows: Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivative Amount of Realized/Unrealized Gain (Loss) Recognized in Income on Derivatives Year ended December 31, December 31, December 31, Interest rate swaps Interest expense $ 14,000 $ 46,000 $ 73,000

AOCI (Tables)

AOCI (Tables)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
Components of accumulated other comprehensive income	Losses on Interest Rate Swaps (A) Post Retirement Benefit Plan Items (B) Total 2014: Balance at January 1, 2014 $ (30,000 ) $ 4,902,000 $ 4,872,000 Other comprehensive income before reclassifications — (2,726,000 ) (2,726,000 ) Amounts reclassified from accumulated other comprehensive income 21,000 (449,000 ) (428,000 ) Income tax (expense) benefit (7,000 ) 1,119,000 1,112,000 Balance at December 31, 2014 $ (16,000 ) $ 2,846,000 $ 2,830,000 2015: Balance at December 31, 2014 $ (16,000 ) $ 2,846,000 $ 2,830,000 Other comprehensive income before reclassifications — 48,000 48,000 Amounts reclassified from accumulated other comprehensive income 21,000 (327,000 ) (306,000 ) Income tax (expense) benefit (8,000 ) 81,000 73,000 Balance at December 31, 2015 $ (3,000 ) $ 2,648,000 $ 2,645,000

Quarterly Results of Operatio41

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly results of operations	The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2015 , 2014 and 2013 . 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Year 2015: Product sales $ 47,854,000 $ 53,514,000 $ 44,243,000 $ 43,492,000 $ 189,103,000 Tooling sales 1,745,000 1,342,000 3,806,000 3,072,000 9,965,000 Net sales 49,599,000 54,856,000 48,049,000 46,564,000 199,068,000 Gross margin 9,025,000 10,982,000 8,311,000 7,934,000 36,252,000 Income before interest and taxes 4,890,000 6,232,000 3,902,000 3,474,000 18,498,000 Net income 3,196,000 4,039,000 2,484,000 2,331,000 12,050,000 Net income per common share: Basic (1) $ 0.42 $ 0.53 $ 0.33 $ 0.31 $ 1.59 Diluted (1) $ 0.42 $ 0.53 $ 0.33 $ 0.31 $ 1.58 2014: Product sales $ 40,664,000 $ 43,317,000 $ 43,171,000 $ 42,592,000 $ 169,744,000 Tooling sales 411,000 2,807,000 420,000 1,822,000 5,460,000 Net sales 41,075,000 46,124,000 43,591,000 44,414,000 175,204,000 Gross margin 6,645,000 7,599,000 8,147,000 7,795,000 30,186,000 Income before interest and taxes 3,116,000 3,873,000 3,704,000 3,954,000 14,647,000 Net income 2,120,000 2,520,000 2,428,000 2,566,000 9,634,000 Net income per common share: Basic (1) $ 0.29 $ 0.34 $ 0.32 $ 0.34 $ 1.28 Diluted (1) $ 0.28 $ 0.33 $ 0.32 $ 0.34 $ 1.28 2013: Product sales $ 32,858,000 $ 32,146,000 $ 32,342,000 $ 36,750,000 $ 134,096,000 Tooling sales 1,504,000 2,535,000 5,092,000 898,000 10,029,000 Net sales 34,362,000 34,681,000 37,434,000 37,648,000 144,125,000 Gross margin 5,890,000 5,989,000 6,370,000 5,325,000 23,574,000 Income before interest and taxes 2,617,000 2,500,000 2,948,000 2,049,000 10,114,000 Net income 1,681,000 1,589,000 1,960,000 1,636,000 6,866,000 Net income per common share: Basic (1) $ 0.24 $ 0.22 $ 0.27 $ 0.22 $ 0.95 Diluted (1) $ 0.23 $ 0.21 $ 0.26 $ 0.22 $ 0.92 (1) Sum of the quarters may not sum to total year due to rounding.

Basis of Presentation (Details)

Basis of Presentation (Details)	12 Months Ended
	Dec. 31, 2015SegmentProduction_Facility
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of production facilities operated | Production_Facility	5
Number of reportable segments | Segment	1

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015USD ($)Bank	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2001USD ($)	Mar. 20, 2015USD ($)	Dec. 31, 2012USD ($)
Business acquisition:
Goodwill	$ 2,403,000	$ 1,097,000
Goodwill, Impairment Loss	0	0	$ 0
Billed contracts receivable	21,967,000	10,407,000
Costs incurred on uncompleted contracts	19,696,000	2,339,000
Tooling in progress	$ 2,271,000	8,068,000
Number of banks in which cash is held | Bank	1
Cash and cash equivalents	$ 8,943,000	2,312,000	2,266,000			$ 7,838,000
Allowance for doubtful accounts	40,000	289,000
Allowance for chargebacks	523,000	813,000
Allowance for slow moving and obsolete inventory	863,000	940,000
Self-insurance reserve	1,074,000	1,165,000
Postemployment Benefits Liability	9,006,000	9,172,000
Research and development expense	719,000	475,000	466,000
Foreign Currency Transaction Gain (Loss), before Tax	54,000	$ (108,000)	$ (27,000)
CPI [Member]
Business acquisition:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					$ 650,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment					$ 12,474,000
Goodwill, acquired during period	$ 1,306,000
Airshield Corporation
Business acquisition:
Goodwill, acquired during period				$ 1,097,000

Summary of Significant Accoun44

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant & Equipment:
Depreciation expense	$ 5,955,000	$ 5,009,000	$ 4,783,000
Capitalized interest expense	2,000	80,000
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Land improvements
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements | Minimum
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements | Maximum
Property, Plant & Equipment:
Useful life	40 years
Machinery and equipment | Minimum
Property, Plant & Equipment:
Useful life	3 years
Machinery and equipment | Maximum
Property, Plant & Equipment:
Useful life	15 years
Tools, dies and patterns | Minimum
Property, Plant & Equipment:
Useful life	3 years
Tools, dies and patterns | Maximum
Property, Plant & Equipment:
Useful life	5 years

Summary of Significant Accoun45

Summary of Significant Accounting Policies - Concentration Risk (Details)	12 Months Ended
	Dec. 31, 2015EmployeeCustomer	Dec. 31, 2014	Dec. 31, 2013
Sales | Customer concentration risk
Concentration risk:
Number of major customers, Sales | Customer	4
Concentration risk percentage	82.00%	87.00%	86.00%
Sales | Geographic concentration risk | Mexico and Canada
Concentration risk:
Concentration risk percentage	35.00%	30.00%	34.00%
Accounts receivable | Customer concentration risk
Concentration risk:
Concentration Risk, Accounts Receivable, Number of major customers | Customer	4
Concentration risk percentage	88.00%	90.00%
Number of employees, geographic area | Labor force concentration risk
Concentration risk:
Concentration risk, number of employees	1,525
Number of employees, geographic area | Labor force concentration risk | United States
Concentration risk:
Concentration risk, number of employees	685
Number of employees, geographic area | Labor force concentration risk | Mexico
Concentration risk:
Concentration risk, number of employees	840
Workforce subject to collective bargaining arrangements | Unionized employees concentration risk
Concentration risk:
Concentration risk, number of employees	1,525
Workforce subject to collective bargaining arrangements | Unionized employees concentration risk | International Association of Machinists and Aerospace Workers
Concentration risk:
Concentration risk, number of employees	293
Workforce subject to collective bargaining arrangements | Unionized employees concentration risk | Sindicato de Jorneleros y Obreros
Concentration risk:
Concentration risk, number of employees	731

Net Income per Common Share (De

Net Income per Common Share (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	0												0
Net income	$ 2,331,000	$ 2,484,000	$ 4,039,000	$ 3,196,000	$ 2,566,000	$ 2,428,000	$ 2,520,000	$ 2,120,000	$ 1,636,000	$ 1,960,000	$ 1,589,000	$ 1,681,000	$ 12,050,000	$ 9,634,000	$ 6,866,000
Weighted average common shares outstanding — basic													7,583,000	7,508,000	7,220,000
Effect of dilutive securities (in shares)													40,000	45,000	215,000
Weighted average common and potentially issuable common shares outstanding — diluted (in shares)													7,623,000	7,553,000	7,435,000
Basic net income per common share (USD per share)	$ 0.31	$ 0.33	$ 0.53	$ 0.42	$ 0.34	$ 0.32	$ 0.34	$ 0.29	$ 0.22	$ 0.27	$ 0.22	$ 0.24	$ 1.59	$ 1.28	$ 0.95
Diluted net income per common share (USD per share)	$ 0.31	$ 0.33	$ 0.53	$ 0.42	$ 0.34	$ 0.32	$ 0.33	$ 0.28	$ 0.22	$ 0.26	$ 0.21	$ 0.23	$ 1.58	$ 1.28	$ 0.92

Major Customers (Details)

Major Customers (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Major customers:
Total product sales	$ 43,492,000	$ 44,243,000	$ 53,514,000	$ 47,854,000	$ 42,592,000	$ 43,171,000	$ 43,317,000	$ 40,664,000	$ 36,750,000	$ 32,342,000	$ 32,146,000	$ 32,858,000	$ 189,103,000	$ 169,744,000	$ 134,096,000
Total tooling sales	3,072,000	3,806,000	1,342,000	1,745,000	1,822,000	420,000	2,807,000	411,000	898,000	5,092,000	2,535,000	1,504,000	9,965,000	5,460,000	10,029,000
Total net sales	$ 46,564,000	$ 48,049,000	$ 54,856,000	$ 49,599,000	$ 44,414,000	$ 43,591,000	$ 46,124,000	$ 41,075,000	$ 37,648,000	$ 37,434,000	$ 34,681,000	$ 34,362,000	199,068,000	175,204,000	144,125,000
Navistar
Major customers:
Total net sales													56,415,000	51,330,000	47,356,000
Volvo [Member]
Major customers:
Total net sales													55,125,000	48,859,000	12,444,000
Paccar
Major customers:
Total net sales													34,430,000	36,128,000	50,154,000
Yamaha [Member]
Major customers:
Total net sales													16,766,000	16,911,000	13,648,000
Other customers
Major customers:
Total net sales													36,332,000	21,976,000	20,523,000
Product sales
Major customers:
Total net sales													189,103,000	169,744,000	134,096,000
Product sales | Navistar
Major customers:
Total net sales													50,169,000	51,254,000	46,384,000
Product sales | Volvo [Member]
Major customers:
Total net sales													53,525,000	46,340,000	11,508,000
Product sales | Paccar
Major customers:
Total net sales													33,452,000	35,602,000	42,784,000
Product sales | Yamaha [Member]
Major customers:
Total net sales													16,766,000	16,911,000	13,648,000
Product sales | Other customers
Major customers:
Total net sales													35,191,000	19,637,000	19,772,000
Tooling sales
Major customers:
Total net sales													9,965,000	5,460,000	10,029,000
Tooling sales | Navistar
Major customers:
Total net sales													6,246,000	76,000	972,000
Tooling sales | Volvo [Member]
Major customers:
Total net sales													1,600,000	2,519,000	936,000
Tooling sales | Paccar
Major customers:
Total net sales													978,000	526,000	7,370,000
Tooling sales | Yamaha [Member]
Major customers:
Total net sales													0	0	0
Tooling sales | Other customers
Major customers:
Total net sales													$ 1,141,000	$ 2,339,000	$ 751,000

Foreign Operations (Details)

Foreign Operations (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign operations:
Total sales	$ 46,564,000	$ 48,049,000	$ 54,856,000	$ 49,599,000	$ 44,414,000	$ 43,591,000	$ 46,124,000	$ 41,075,000	$ 37,648,000	$ 37,434,000	$ 34,681,000	$ 34,362,000	$ 199,068,000	$ 175,204,000	$ 144,125,000
Property, plant and equipment — net	74,103,000				61,995,000								74,103,000	61,995,000
United States
Foreign operations:
Total sales													129,651,000	123,317,000	95,063,000
Property, plant and equipment — net	44,191,000				31,674,000								44,191,000	31,674,000
Mexico
Foreign operations:
Total sales													63,586,000	47,772,000	45,069,000
Property, plant and equipment — net	$ 29,912,000				$ 30,321,000								29,912,000	30,321,000
Canada
Foreign operations:
Total sales													5,831,000	4,115,000	3,993,000
CoreComposites de Mexico, S. de R.L. de C.V.
Foreign operations:
Sales													$ 69,235,000	$ 61,313,000	$ 61,612,000
Expenses as a percentage of revenues													19.00%	22.00%	23.00%

Property, Plant & Equipment (De

Property, Plant & Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant & Equipment:
Property, plant and equipment	$ 137,996,000	$ 119,933,000
Accumulated depreciation	(63,893,000)	(57,938,000)
Property, plant and equipment — net	74,103,000	61,995,000
Commitments for capital expenditures in progress recorded on balance sheet	1,102,000	1,682,000
Capital Expenditures Incurred but Not yet Paid	464,000	557,000	$ 709,000
Capitalized interest expense	2,000	80,000
Land and land improvements
Property, Plant & Equipment:
Property, plant and equipment	5,958,000	5,098,000
Buildings
Property, Plant & Equipment:
Property, plant and equipment	41,417,000	37,143,000
Machinery and equipment
Property, Plant & Equipment:
Property, plant and equipment	87,482,000	75,905,000
Tools, dies and patterns
Property, Plant & Equipment:
Property, plant and equipment	808,000	808,000
Additions in progress
Property, Plant & Equipment:
Property, plant and equipment	$ 2,331,000	$ 979,000

Business Combination (Details)

Business Combination (Details) - CPI [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 20, 2015
Business Combination, Separately Recognized Transactions [Line Items]
Business Acquisitions, Gross Purchase Price		$ 15,000,000
Business Combination, Reduction in Purchase Price		488,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		1,615,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory		675,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other		171,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		12,474,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Goodwill		1,306,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		650,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		(2,277,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other		(102,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		$ 14,512,000
Selling, General and Administrative Expenses [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	$ 303,000

Goodwill and Intangible Asset51

Goodwill and Intangible Asset Disclosure (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 20, 2015
Goodwill [Roll Forward]
Beginning Goodwill	$ 1,097,000
Goodwill, Impairment Loss	0	$ 0	$ 0
Ending Goodwill	$ 2,403,000	$ 1,097,000
CPI [Member]
Goodwill [Roll Forward]
Additions				$ 1,306,000

Goodwill and Intangible Asset52

Goodwill and Intangible Asset Disclosure Intangible Assets by Major Asset Class (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 37,000	$ 0
Finite-Lived Intangible Assets, Gross	650,000
Finite-Lived Intangible Assets, Accumulated Amortization	37,000
Finite-Lived Intangible Assets, Net	$ 613,000
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Finite-Lived Intangible Assets, Gross	$ 400,000
Finite-Lived Intangible Assets, Accumulated Amortization	30,000
Finite-Lived Intangible Assets, Net	$ 370,000
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years
Finite-Lived Intangible Assets, Gross	$ 250,000
Finite-Lived Intangible Assets, Accumulated Amortization	7,000
Finite-Lived Intangible Assets, Net	$ 243,000

Debt and Leases - Debt (Details

Debt and Leases - Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 08, 2010	Dec. 31, 2008	May. 31, 1998
Debt:
Long-term Debt	$ 13,464,000	$ 5,196,000
Current portion of long-term debt	(3,714,000)	(4,482,000)
Long-term debt	9,750,000	714,000
Planned capital improvements excluded from fixed charge	18,000,000
Loans payable | Capex loan
Debt:
Long-term Debt	$ 714,000	$ 2,428,000
Stated interest rate	2.04%	1.76%
Repayment term	7 years
Debt instrument, face amount	$ 12,000,000
Debt Instrument, Description of Variable Rate Basis	30 day LIBOR
Basis spread on variable rate	1.60%	1.75%
Loans payable | Term Loan [Member]
Debt:
Long-term Debt	$ 12,750,000	$ 0
Repayments of Short-term Debt	$ 500,000
Stated interest rate	2.24%
Repayment term	5 years
Debt Instrument, Description of Variable Rate Basis	30 day LIBOR
Basis spread on variable rate	1.80%
Proceeds from (Repayments of) Debt	$ 15,500,000
Loans payable | Mexican Loan [Member]
Debt:
Stated interest rate		1.73%
Repayment term		5 years
Debt instrument, face amount				$ 8,000,000
Debt Instrument, Description of Variable Rate Basis		LIBOR
Basis spread on variable rate		1.60%	1.75%
Loans payable | Industrial Development Revenue Bond
Debt:
Stated interest rate		0.30%
Debt instrument, face amount	$ 3,332,493					$ 7,500,000
Loans payable | Mexican Expansion Revolving Loan
Debt:
Basis spread on variable rate	1.60%
Line of credit
Debt:
Percent of subsidiary stock not security for financing	65.00%
Line of credit facility, maximum borrowing capacity	$ 18,000,000
Debt Instrument, Description of Variable Rate Basis	daily LIBOR
Line of credit | Mexican Loan [Member]
Debt:
Debt instrument, face amount	$ 8,000,000
Line of credit | Revolving line of credit
Debt:
Long-term Debt	0	$ 2,768,000
Line of credit facility, maximum borrowing capacity	$ 18,000,000				$ 8,000,000
Basis spread on variable rate	1.60%	1.75%
Line of credit | Mexican Expansion Revolving Loan
Debt:
Mexican Expansion Revolving Loan, unused borrowing capacity, mount	$ 10,000,000

Debt and Leases Annual Maturiti

Debt and Leases Annual Maturities of Long-Term Debt (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
2,016	$ 3,714,000
2,017	3,000,000
2,018	3,000,000
2,019	3,000,000
2,020	750,000
Long-term Debt	$ 13,464,000	$ 5,196,000

Debt and Leases - Interest Rate

Debt and Leases - Interest Rate Swaps (Details) - USD ($)	Dec. 31, 2009	Mar. 31, 2009	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest rate swaps:
Interest expense for settlements related to swaps			$ 32,000	$ 70,000	$ 110,000
Industrial Development Revenue Bond swap agreement | Interest rate swap | Cash flow hedging | Designated as hedging instrument
Interest rate swaps:
Derivative, fixed interest rate				4.89%
Debt Instrument, Description of Variable Rate Basis	30-day commercial paper rate
Percentage of variable rate receivable	76.00%
Derivative, variable interest rate						0.10%
Description of reclassification of cash flow hedge gain (loss)				The pre-tax loss previously recognized in Accumulated Other Comprehensive Income (Loss), totaling $200,000 as of December 31, 2009, was amortized as an increase to interest expense of $5,000 per month, or $3,000 net of tax, over the remaining term of the interest rate swap agreement.
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income	$ 200,000
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income, monthly amortization amount	5,000
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income, monthly amortization amount, net of tax	$ 3,000
Capex loan swap agreement | Interest rate swap | Cash flow hedging | Designated as hedging instrument
Interest rate swaps:
Derivative, fixed interest rate			2.295%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Derivative, variable interest rate				0.44%
Description of reclassification of cash flow hedge gain (loss)			The pre-tax loss previously recognized in Accumulated Other Comprehensive Income (Loss), totaling $146,000 as of March 31, 2009, is being amortized as an increase to interest expense of $2,000 per month, or $1,000 net of tax, over the remaining term of the interest rate swap agreement.
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income		$ 146,000
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income, monthly amortization amount		2,000
Pre-tax loss previously recognized in Accumulated Other Comprehensive Income, monthly amortization amount, net of tax		$ 1,000
Derivatives not designated as hedging instruments, interest rate swap liabilities			$ 2,000	$ 37,000
Interest income (loss) for mark-to-market adjustment of swap fair value			(35,000)	66,000	$ 102,000
Derivative, Notional Amount			714,000	$ 2,428,000
Debt instrument, face amount			$ 12,000,000

Debt and Leases - Leases (Detai

Debt and Leases - Leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases:
Rental expense	$ 696,000	$ 767,000	$ 800,000
Future minimum operating lease payments:
2,016	539,000
2,017	486,000
2,018	328,000
2,019	192,000
Thereafter	0
Total minimum lease payments	$ 1,545,000
Warehouse and distribution center
Leases:
Operating lease duration	5 years

Stock Based Compensation (Detai

Stock Based Compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock based compensation:
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 211,000	$ 395,000	$ 409,000
2006 Plan
Stock based compensation:
Number of shares authorized for grant	3,000,000
Shares Remaining for Issuance	1,542,615
Employee Stock Option [Member]
Stock based compensation:
Proceeds from exercise of stock options	$ 19,000	328,000	410,000
Intrinsic value of options exercised in period	26,000	915,000	825,000
Tax benefit received as a result of disqualified dispositions	9,000	311,000	$ 300,000
Excess tax benefit related to disqualified dispositions recorded as a credit to income tax expense	6,000	84,000
Excess tax benefit related to disqualified dispositions recorded as a credit to APIC	$ 3,000	$ 227,000
Options, outstanding:
Options, outstanding, beginning of year (in shares)	3,000	227,750	374,875
Options, outstanding, grants in period (in shares)	0	0	0
Options, outstanding, exercises in period (in shares)	(3,000)	(224,750)	(132,725)
Options, outstanding, forfeitures in period (in shares)	0	0	(14,400)
Options outstanding, end of year (in shares)	0	3,000	227,750
Options, weighted average exercise price:
Options, outstanding, weighted average exercise price, beginning of year (USD per share)	$ 6.40	$ 3.57	$ 3.37
Options, grants in period, weighted average exercise price (USD per share)	0	0	0
Options, exercises in period, weighted average exercise price (USD per share)	6.40	3.53	3.09
Options, forfeitures in period, weighted average exercise price (USD per share)	$ 0	0	2.75
Options, outstanding, weighted average exercise price, end of year (USD per share)		$ 6.40	$ 3.57
Options, additional disclosures:
Options, exercisable (in shares)	0	3,000	227,750
Options, exercisable, weighted average exercise price (USD per share)		$ 6.40	$ 3.57
Options, vested and expected to vest (in shares)	0	3,000	227,750
Options, vested and expected to vest, weighted average exercise price (USD per share)	$ 0	$ 6.40	$ 3.57
Employee Stock Option [Member] | 2006 Plan
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Term Until Expiration	10 years
Employee Stock Option [Member] | Vesting Period 1 [Member] | 2006 Plan
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Employee Stock Option [Member] | Vesting Period 2 [Member] | 2006 Plan
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	9 years 6 months
Employee Stock Option [Member] | Selling, General and Administrative Expenses [Member]
Stock based compensation:
Stock based compensation expense	$ 0	$ 0	$ 5,000
Unvested stock options
Options, outstanding:
Options, outstanding, beginning of year (in shares)		0	14,400
Options, outstanding, grants in period (in shares)			0
Options, outstanding, forfeitures in period (in shares)			(14,400)
Options outstanding, end of year (in shares)			0
Options, weighted average exercise price:
Options, grants in period, weighted average exercise price (USD per share)			$ 0
Options, forfeitures in period, weighted average exercise price (USD per share)			$ 2.75
Unvested options:
Options, vested in period (in shares)			0
Options, nonvested, weighted average exercise price (USD per share)			$ 0	$ 2.75
Options, vested in period, weighted average grant date fair value (USD per share)			$ 0
Restricted stock
Stock based compensation:
Employee Service Shared-based Compensation, Tax Benefit from Compensation Expense, Restricted Stock	$ 202,000	$ 84,000	$ 109,000
Restricted stock, nonvested:
Restricted stock, nonvested, beginning of year (in shares)	104,068	98,281	139,730
Restricted stock, grants in period (in shares)	56,662	81,763	63,876
Restricted stock, vested in period (in shares)	(46,629)	(75,976)	(91,573)
Restricted stock, forfeitures in period (in shares)	(1,194)	0	(13,752)
Restricted stock, nonvested, end of year (in shares)	112,907	104,068	98,281
Restricted stock, weighted average grant date fair value:
Restricted stock, nonvested, weighted average grant date fair value, beginning of period (USD per share)	$ 10.79	$ 8.91	$ 6.77
Restricted stock, grants in period, weighted average grant date fair value (USD per share)	24.39	12.04	9.32
Restricted stock, vested in period, weighted average grant date fair value (USD per share)	11.82	10.03	5.95
Restricted stock, forfeitures in period, weighted average grant date fair value (USD per share)	24.39	0	8.74
Restricted stock, nonvested, weighted average grant date fair value, end of period (USD per share)	$ 16.86	$ 10.79	$ 8.91
Total unrecognized compensation expense	$ 1,263,000	$ 775,000
Weighted average period for recognition of compensation expense	1 year 7 months 6 days
Shares Paid for Tax Withholding for Share Based Compensation	12,141	21,797
Restricted stock | 2006 Plan
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Restricted stock | Selling, General and Administrative Expenses [Member]
Stock based compensation:
Stock based compensation expense	$ 785,000	$ 744,000	$ 408,000

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal - US	$ 4,466,000	$ 1,875,000	$ 2,540,000
Federal - Foreign	405,000	453,000	171,000
State and local	18,000	42,000	44,000
Current income tax expense (benefit)	4,889,000	2,370,000	2,755,000
Deferred:
Federal	1,143,000	2,423,000	496,000
Deferred Foreign Income Tax Expense (Benefit)	27,000	(29,000)	(240,000)
State and local	59,000	127,000	23,000
Deferred income tax expense (benefit)	1,229,000	2,521,000	279,000
Total income taxes	6,118,000	4,891,000	3,034,000
Reconciliation of income tax provision:
Provision at federal statutory rate - US	6,177,000	4,938,000	3,366,000
Effect of Mexican tax law change	0	0	(240,000)
Effect of foreign taxes	(84,000)	(115,000)	(192,000)
Disqualified stock options	(5,000)	(84,000)	0
State and local tax expense, net of federal benefit	76,000	170,000	44,000
Other	$ (46,000)	$ (18,000)	56,000
Federal Statutory Income Tax Rate	34.00%	34.00%
Components of deferred tax assets (liabilities):
Accrued liabilities	$ 820,000	$ 808,000
Accounts receivable	202,000	484,000
Inventory	698,000	680,000
Other, net	(122,000)	(104,000)
Total current asset	1,598,000	1,868,000
Property, plant, and equipment	(4,844,000)	(4,273,000)
Post retirement benefits	3,350,000	3,419,000
Other, net	(758,000)	(511,000)
Deferred Tax Liabilities, Net, Noncurrent	(2,252,000)	(1,365,000)
Deferred tax assets	(654,000)	503,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	211,000	$ 395,000	$ 409,000
Unrecorded deferred tax liabilities, undistributed foreign earnings	7,319,000
Unrecognized Tax Benefits	$ 0

Post Retirement Benefits - Mult

Post Retirement Benefits - Multiemployer Plans (Details)		12 Months Ended
		Aug. 09, 2016$ / h	Dec. 31, 2015USD ($)	Aug. 09, 2015$ / h	Dec. 31, 2014USD ($)	Aug. 11, 2014$ / h	Dec. 31, 2013USD ($)	Aug. 10, 2013$ / h
Multiemployer plans:
Certified zone status, percent funded limit for red status			65.00%
Certified zone status, percent funded limit for yellow status			80.00%
Certified zone status, percent funded limit for green status			80.00%
Multi-employer plan contributions | $	[1]		$ 863,000		$ 719,000		$ 464,000
Multiemployer plan, postretirement benefit
Multiemployer plans:
Maximum percentage of total contribution			5.00%
Multiemployer plans, collective-bargaining arrangement, maximum hours of work per week for employer contribution			40 hours
Multiemployer plans, collective-bargaining arrangement, rate of employer contribution				1.35		1.30		1.25
Forecast | Multiemployer plan, postretirement benefit
Multiemployer plans:
Multiemployer plans, collective-bargaining arrangement, rate of employer contribution		1.40
[1]	The National Pension Plan utilized a five year amortization extension in accordance with § 431(d) of the Internal Revenue Code of 1986 ("the Code") to amortize its losses from 2008. The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2014. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.25 per hour from August 13, 2012 through August 10, 2013

Post Retirement Benefits - Chan

Post Retirement Benefits - Change in Benefit Obligation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in benefit obligation:
Interest cost	$ 316,000	$ 277,000	$ 332,000
Postretirement benefits
Change in benefit obligation:
Benefit obligation at beginning of year	9,172,000	6,774,000
Interest cost	316,000	277,000
Unrecognized (gain) loss	(48,000)	2,726,000
Benefits paid	(434,000)	(605,000)
Benefit obligation at beginning of year	9,006,000	9,172,000	$ 6,774,000
Plan Assets	0	0
Amounts recorded in accumulated other comprehensive income:
Prior service credit	(7,594,000)	(8,090,000)
Net loss	3,939,000	4,156,000
Total	$ (3,655,000)	$ (3,934,000)
Weighted-average assumptions:
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.10%	3.80%

Post Retirement Benefits - Post

Post Retirement Benefits - Post Retirement Benefits Expense (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension, health and life insurance expense:
Multi-employer plan contributions	[1]	$ 863,000	$ 719,000	$ 464,000
Defined contribution plan contributions		836,000	701,000	571,000
Total pension expense		1,699,000	1,420,000	1,035,000
Interest cost		316,000	277,000	332,000
Amortization of prior service costs		(496,000)	(496,000)	(496,000)
Amortization of net loss		169,000	47,000	201,000
Net periodic benefit cost		(11,000)	(172,000)	37,000
Total post retirement benefits expense		1,688,000	1,248,000	$ 1,072,000
Postretirement benefits
Postretirement benefits:
Defined Benefit Plan, Actuarial Gain (Loss)		48,000	(2,726,000)
Pension, health and life insurance expense:
Interest cost		$ 316,000	$ 277,000
[1]	The National Pension Plan utilized a five year amortization extension in accordance with § 431(d) of the Internal Revenue Code of 1986 ("the Code") to amortize its losses from 2008. The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2014. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.25 per hour from August 13, 2012 through August 10, 2013

Post Retirement Benefits (Detai

Post Retirement Benefits (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)Plan	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2010USD ($)
Postretirement benefits:
Number of 401k plans | Plan		3
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Interest cost		$ 316,000	$ 277,000	$ 332,000
Postretirement benefits
Postretirement benefits:
Decrease in post retirement obligations					$ 10,282,000
Amortization period					20 years
Change in net periodic benefit cost due to plan amendment		496,000
Actuarial gain (loss)		(48,000)	2,726,000
Prior service credit not yet recognized		3,655,000	3,934,000
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Amortization of prior service credit, net of tax		(496,000)
Amortization of loss, net of tax		(155,000)
Interest cost		$ 316,000	$ 277,000
Assumed health care cost trend rates:
Health care cost trend rate assumed for next fiscal year		6.00%	7.00%
Ultimate health care cost trend rate		5.00%	5.00%
Effect of changing the health care cost trend rate by one-percentage point for each future year:
Effect on total of service and interest cost components, 1 - percentage point increase		$ 40,000
Effect on total of service and interest cost components, 1 - percentage point decrease		(47,000)
Effect on post retirement benefit obligation, 1 - percentage point increase		1,028,000
Effect on post retirement benefit obligation, 1 - percentage point decrease		$ (1,227,000)
Forecast | Postretirement benefits
Postretirement benefits:
Change in net periodic benefit cost due to plan amendment	$ 496,000
Actuarial gain (loss)	(18,000)
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Interest cost	$ 323,000

Post Retirement Benefits - Futu

Post Retirement Benefits - Future Benefit Payments (Details) - Postretirement benefits	Dec. 31, 2015USD ($)
Postretirement benefits:
2,015	$ 1,060,000
2,016	392,000
2,017	370,000
2,018	368,000
2,019	381,000
2020 - 2024	$ 2,144,000

Related Party Transactions (Det

Related Party Transactions (Details) - Common stock - Navistar - shares	Jul. 18, 2007	Dec. 31, 2014	Dec. 31, 1996
Related party transactions:
Common stock issued (in shares)			4,264,000
Number of shares repurchased	3,600,000	664,000

Fair Value of Financial Instr65

Fair Value of Financial Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair value of financial instruments:
Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next 12 Months Net Of Tax	$ 5,000
Amortization of gain (loss) on discontinued hedges during next 12 months	(2,000)
Swap | Interest rate swap | Interest expense | Not designated as hedging instrument
Fair value of financial instruments:
Amount of Realized/Unrealized Gain (Loss) Recognized in Income on Derivatives	14,000	$ 46,000	$ 73,000
Level 2 | Swap | Interest rate swap | Recurring | Interest rate swaps | Not designated as hedging instrument
Fair value of financial instruments:
Derivatives not designated as hedging instruments, interest rate swap liabilities	$ 2,000	$ 37,000

AOCI (Details)

AOCI (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 2,830,000	$ 4,872,000
Other comprehensive income before reclassifications	48,000	(2,726,000)
Amounts reclassified from accumulated other comprehensive income, before tax	(306,000)	(428,000)
Other Comprehensive Income (Loss), Tax	73,000	1,112,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,645,000	2,830,000
Derivative [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(16,000)	(30,000)
Other comprehensive income before reclassifications	0	0
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	21,000	21,000
Other Comprehensive Income (Loss), Tax	(8,000)	(7,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,000)	(16,000)
Other Postretirement Benefit Plan, Defined Benefit [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,846,000	4,902,000
Other comprehensive income before reclassifications	48,000	(2,726,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	(327,000)	(449,000)
Other Comprehensive Income (Loss), Tax	81,000	1,119,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 2,648,000	$ 2,846,000

Quarterly Results of Operatio67

Quarterly Results of Operations (Unaudited) (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly results of operations:
Total product sales	$ 43,492,000	$ 44,243,000	$ 53,514,000	$ 47,854,000	$ 42,592,000	$ 43,171,000	$ 43,317,000	$ 40,664,000	$ 36,750,000	$ 32,342,000	$ 32,146,000	$ 32,858,000	$ 189,103,000	$ 169,744,000	$ 134,096,000
Total tooling sales	3,072,000	3,806,000	1,342,000	1,745,000	1,822,000	420,000	2,807,000	411,000	898,000	5,092,000	2,535,000	1,504,000	9,965,000	5,460,000	10,029,000
Total net sales	46,564,000	48,049,000	54,856,000	49,599,000	44,414,000	43,591,000	46,124,000	41,075,000	37,648,000	37,434,000	34,681,000	34,362,000	199,068,000	175,204,000	144,125,000
Gross margin	7,934,000	8,311,000	10,982,000	9,025,000	7,795,000	8,147,000	7,599,000	6,645,000	5,325,000	6,370,000	5,989,000	5,890,000	36,252,000	30,186,000	23,574,000
Income before interest and taxes	3,474,000	3,902,000	6,232,000	4,890,000	3,954,000	3,704,000	3,873,000	3,116,000	2,049,000	2,948,000	2,500,000	2,617,000	18,498,000	14,647,000	10,114,000
Net income	$ 2,331,000	$ 2,484,000	$ 4,039,000	$ 3,196,000	$ 2,566,000	$ 2,428,000	$ 2,520,000	$ 2,120,000	$ 1,636,000	$ 1,960,000	$ 1,589,000	$ 1,681,000	$ 12,050,000	$ 9,634,000	$ 6,866,000
Net income per common share:
Basic (USD per share)	$ 0.31	$ 0.33	$ 0.53	$ 0.42	$ 0.34	$ 0.32	$ 0.34	$ 0.29	$ 0.22	$ 0.27	$ 0.22	$ 0.24	$ 1.59	$ 1.28	$ 0.95
Diluted (USD per share)	$ 0.31	$ 0.33	$ 0.53	$ 0.42	$ 0.34	$ 0.32	$ 0.33	$ 0.28	$ 0.22	$ 0.26	$ 0.21	$ 0.23	$ 1.58	$ 1.28	$ 0.92

Schedule II (Details)

Schedule II (Details) - Allowance for Doubtful Accounts [Member] - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 289,000	$ 141,000	$ 258,000
(Recovered)/Charged to Costs and Expenses		(159,000)	197,000	51,000
Charged to Other Accounts		0	0	0
Deductions	[1]	90,000	49,000	168,000
Balance at End of Year		$ 40,000	$ 289,000	$ 141,000
[1]	Amount represents uncollectible accounts written off.