L.B. Foster (FSTR) 10-K 27 Feb 20 2019 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 19, 2020	Jun. 30, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	0-10436
Entity Registrant Name	FOSTER L B CO
Entity Incorporation, State	PA
Entity Tax Identification Number	25-1324733
Entity Address, Street Address	415 Holiday Drive
Entity Address, Suite	Suite 100
Entity Address, City	Pittsburgh
Entity Address, State	PA
Entity Address, Postal Zip Code	15220
City Area Code	412
Local Phone Number	928-3400
Title of Each Class	Common Stock, Par Value $0.01
Trading Symbol(s)	FSTR
Name of Each Exchange On Which Registered	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 269,739,994
Entity Common Stock, Shares Outstanding		10,572,890
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0000352825
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 14,178	$ 10,282
Accounts receivable - net (Note 5)	78,575	86,123
Inventories - net (Note 6)	119,301	124,504
Other current assets	4,610	5,763
Total current assets	216,664	226,672
Property, plant, and equipment - net (Note 7)	82,314	86,857
Operating lease right-of-use assets - net (Note 8)	13,274
Other assets:
Goodwill (Note 4)	19,565	19,258
Other intangibles - net (Note 4)	43,514	49,836
Deferred tax assets (Note 14)	28,638	0
Other assets	1,202	626
TOTAL ASSETS	405,171	383,249
Current liabilities:
Accounts payable	66,361	78,269
Deferred revenue (Note 9)	8,446	6,619
Accrued payroll and employee benefits	14,096	12,993
Accrued warranty (Note 18)	1,222	2,057
Current portion of accrued settlement (Note 18)	8,000	10,000
Current maturities of long-term debt (Note 10)	2,905	629
Other accrued liabilities	15,714	13,624
Total current liabilities	116,744	124,191
Long-term debt (Note 10)	55,288	74,353
Deferred tax liabilities (Note 14)	4,751	5,287
Accrued legal settlement, non-current	32,000	40,000
Long-term operating lease liabilities	10,268
Other long-term liabilities	16,258	17,299
Stockholders' equity:
Common stock, par value $0.01 authorized 20,000,000 shares; shares issued at December 31, 2019 and December 31, 2018, 11,115,779; shares outstanding at December 31, 2019 and December 31, 2018, 10,422,091 and 10,366,007, respectively (Note 11)	111	111
Paid-in capital	49,204	48,040
Retained earnings	157,525	114,324
Treasury stock - at cost, common stock, shares at December 31, 2019 and December 31, 2018, 693,688 and 749,772, respectively (Note 11)	(16,795)	(18,165)
Accumulated other comprehensive loss (Note 12)	(20,183)	(22,191)
Total stockholders' equity	169,862	122,119
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 405,171	$ 383,249

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	20,000,000	20,000,000
Common stock, issued (shares)	11,115,779	11,115,779
Common stock, shares outstanding (shares)	10,422,091	10,366,007
Treasury stock shares - at cost, common stock (shares)	693,688	749,772

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Total net sales	$ 655,057	$ 626,969
Total cost of sales	533,685	509,810
Gross profit	121,372	117,159
Selling and administrative expenses	87,986	87,679
Amortization expense	6,577	7,098
Concrete Tie Settlement expense (Note 18)	0	43,400
Interest expense - net	(4,920)	(6,154)
Other income	4,492	(461)
Total expenses	103,975	143,870
Income (loss) before income taxes	17,397	(26,711)
Income tax expense	(25,171)	4,457
Net (loss) income	$ 42,568	$ (31,168)
Basic (loss) earnings per common share (usd per share)	$ 4.09	$ (3.01)
Diluted (loss) earnings per common share (usd per share)	$ 4	$ (3.01)
Sales of goods
Total net sales	$ 508,504	$ 463,165
Total cost of sales	416,748	380,395
Sales of services
Total net sales	146,553	163,804
Total cost of sales	$ 116,937	$ 129,415

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 42,568	$ (31,168)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		2,033	(4,405)
Unrealized (loss) gain on cash flow hedges, net of tax expense of $296 and $0, respectively		(859)	453
Pension and post-retirement benefit plans benefit (expense), net of tax expense (benefit) of $523 and $(36), respectively		1,406	(543)
Reclassification of pension liability adjustments to earnings, net of tax expense of $26 and $4, respectively*	[1]	61	71
Other comprehensive income (loss)		2,641	(4,424)
Comprehensive income (loss)		$ 45,209	$ (35,592)
[1]	Reclassifications out of Accumulated other comprehensive loss for pension obligations are reflected in selling and administrative expense.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized gain on cash flow hedge, tax	$ 296	$ 0
Pension and post-retirement benefit plan, tax	(523)	36
Reclassification of pension liability adjustments to earnings, tax	$ 26	$ 4

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 42,568	$ (31,168)
Adjustments to reconcile net income (loss) to cash provided (used) by operating activities:
Deferred income taxes	(29,510)	(1,598)
Depreciation	11,054	11,495
Amortization	6,577	7,098
Concrete Tie Settlement expense (Note 18)	0	43,400
Equity (income) loss in nonconsolidated investments	(17)	7
Loss on sales and disposals of property, plant, and equipment	1,192	1,297
Stock-based compensation	3,155	3,836
Pension settlement	2,210	0
Change in operating assets and liabilities:
Accounts receivable	7,928	(11,438)
Inventories	6,688	(23,403)
Other current assets	1,496	140
Prepaid income tax	(1,703)	(249)
Other noncurrent assets	(402)	1,319
Accounts payable	(12,690)	24,210
Deferred revenue	1,782	(3,491)
Accrued payroll and employee benefits	1,018	1,233
Accrued settlement	(10,000)	0
Other current liabilities	(933)	4,046
Other liabilities	(1,116)	(770)
Net cash provided by operating activities	29,297	25,964
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of property, plant, and equipment	1,151	2,389
Capital expenditures on property, plant, and equipment	(8,831)	(5,251)
Proceeds from sale of equity method investment	0	3,875
Repayment of revolving line of credit from equity method investment	0	1,235
Net cash (used in) provided by investing activities	(7,680)	2,248
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt	(210,323)	(195,254)
Proceeds from debt	193,534	140,270
Debt issuance costs	(836)	0
Treasury stock acquisitions	(621)	(316)
Net cash used in financing activities	(18,246)	(55,300)
Effect of exchange rate changes on cash and cash equivalents	525	(308)
Net increase (decrease) in cash and cash equivalents	3,896	(27,396)
Cash and cash equivalents at beginning of period	10,282	37,678
Cash and cash equivalents at end of period	14,178	10,282
Supplemental disclosure of cash flow information:
Interest paid	4,587	5,577
Income taxes paid	$ 6,513	$ 4,512

Consolidated Statements of Stoc

Consolidated Statements of Stockholders Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2017	$ 154,496	$ 111	$ 45,017	$ 145,797	$ (18,662)	$ (17,767)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(31,168)			(31,168)
Other comprehensive income (loss), net of tax:
Pension liability adjustment	(472)					(472)
Foreign currency translation adjustment	(4,405)					(4,405)
Unrealized derivative gain on cash flow hedges	453					453
Issuance of common shares net of shares withheld for taxes	(316)		(813)		497
Stock-based compensation	3,836		3,836
Ending balance at Dec. 31, 2018	122,119	111	48,040	114,324	(18,165)	(22,191)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	42,568			42,568
Other comprehensive income (loss), net of tax:
Pension liability adjustment	1,467					1,467
Foreign currency translation adjustment	2,033					2,033
Unrealized derivative gain on cash flow hedges	(859)					(859)
Issuance of common shares net of shares withheld for taxes	(621)		(1,991)		1,370
Stock-based compensation	3,155		3,155
Ending balance at Dec. 31, 2019	$ 169,862	$ 111	$ 49,204	$ 157,525	$ (16,795)	$ (20,183)

Consolidated Statements of St_2

Consolidated Statements of Stockholders Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Common shares issues net of shares withheld (shares)	56,084	25,431

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization, operations, and basis of consolidation The consolidated financial statements include the accounts of L.B. Foster Company and its wholly-owned subsidiaries, joint ventures, and partnerships in which a controlling interest is held. Inter-company transactions and accounts have been eliminated. The Company utilizes the equity method of accounting for companies where its ownership is less than or equal to 50% and significant influence exists. L.B. Foster Company (“Company”) is a leading manufacturer and distributor of products and service provider for transportation and energy infrastructure with locations in North America and Europe. The Company is organized and operates in three business segments: Rail Products and Services (“Rail”), Construction Products (“Construction”), and Tubular and Energy Services (“Tubular and Energy”). The Rail segment is comprised of several manufacturing and distribution businesses that provide a variety of products and services for freight and passenger railroads and industrial companies throughout the world. The Construction segment is composed of piling, fabricated bridge, and precast concrete product offerings across North America. The Tubular and Energy segment provides products and services predominantly to the U.S. mid and upstream oil and gas markets. Use of estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates, judgements, and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates and changes in these estimates are recorded when known. Significant accounting policies Cash and cash equivalents The Company considers cash and other instruments with maturities of three months or less when purchased to be cash and cash equivalents. The Company invests available funds in a manner to maximize returns, preserve investment principal, and maintain liquidity, while seeking the highest yield available. Cash and cash equivalents held in non-domestic accounts were $13,660 and $8,058 as of December 31, 2019 and 2018, respectively. Included in non-domestic cash equivalents are investments in bank term deposits of approximately $17 and $16 as of December 31, 2019 and 2018, respectively. The carrying amounts approximated fair value due to the short maturity of the instruments. Inventory Inventory is valued at the lower of average cost or net realizable value. Slow-moving inventory is reviewed and adjusted regularly, based upon product knowledge, physical inventory observation, inventory turnover, and the age of the inventory. Inventory contains product costs, including inbound freight, direct labor, overhead costs relating to the manufacturing and distribution of products, and absorption costs representing the excess manufacturing or production costs over the amounts charged to the cost of sales or services. Property, plant, and equipment Depreciation and amortization are provided on a straight-line basis over the estimated useful lives of 7 to 40 years for buildings and 2 to 13 years for machinery and equipment. Leasehold improvements are amortized over 6 to 10 years, which represent the lives of the respective leases or the lives of the improvements, whichever is shorter. Depreciation expense is recorded within “Cost of goods sold,” “Cost of services sold,” and “Selling and administrative expenses” on the Consolidated Statements of Operations based upon the particular asset’s use. The Company reviews a long-lived asset for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The Company recognizes an impairment loss if the carrying amount of a long-lived asset is not recoverable and exceeds its fair value. There were no property, plant, and equipment impairments recorded for the years ended December 31, 2019 and 2018. Maintenance, repairs, and minor renewals are charged to operations as incurred. Major renewals and betterments that substantially extend the useful life of the property are capitalized at cost. Upon sale or other disposition of assets, the costs and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss, if any, is reflected in “Other income or expense.” Allowance for doubtful accounts The allowance for doubtful accounts is recorded to reflect the estimated realization of the Company’s accounts receivable and includes assessments of the probability of collection and the credit-worthiness of certain customers. Reserves for uncollectible accounts are recorded as part of “Selling and administrative expenses” on the Consolidated Statements of Operations. The Company reviews its accounts receivable aging and calculates an allowance through application of historic reserve factors to overdue receivables. This calculation is supplemented by specific account reviews performed by the Company’s credit department. As necessary, the application of the Company’s allowance rates to specific customers is reviewed and adjusted to more accurately reflect the credit risk inherent within that customer relationship. Goodwill and other intangible assets Goodwill is the cost of an acquisition less the fair value of the identifiable net assets of the acquired business. Goodwill is tested annually for impairment or more often if there are indicators of impairment within a reporting unit. A reporting unit is an operating segment or a component of an operating segment for which discrete financial information is available and reviewed by management on a regular basis. The goodwill impairment test involves comparing the fair value of a reporting unit to its carrying value, including goodwill. If the carrying amount of the reporting unit exceeds its fair value, an impairment loss equal to the excess amount up to the goodwill balance is recorded as a component of operations. The Company performs its annual impairment tests in the fourth quarter. The Company’s fourth quarter 2019 annual test included the assessment of qualitative factors to determine whether it was more likely than not that the fair value of each reporting unit is less than its carrying value. The qualitative assessment encompassed a review of events and circumstances specific to each reporting unit with goodwill, as well as specific to the entity as a whole. The Company’s qualitative assessment considered, among other things, factors such as macroeconomic conditions, industry and market considerations, including changes in the Company’s stock price and market multiples, projected financial performance, cost factors, changes in carrying values, and other relevant factors. Considering the totality of the qualitative factors assessed, based on the weight of evidence, no circumstances existed that would indicate it was more likely than not that goodwill was impaired. There was no goodwill impairment recognized during 2019 or 2018. The Company continues to monitor the recoverability of the long-lived assets associated with certain reporting units of the Company and the long-term financial projections of the businesses. Sustained declines in the markets we serve may result in future long-lived asset impairment. The Company has no indefinite-lived intangible assets. The Company reviews a long-lived intangible asset for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. All intangible assets are amortized over their estimated useful lives. There were no definite-lived intangible asset impairments during the years ended December 31, 2019 and 2018. Environmental remediation and compliance Environmental remediation costs are accrued when the liability is probable and costs are estimable. Environmental compliance costs, which principally include the disposal of waste generated by routine operations, are expensed as incurred. Capitalized environmental costs, when appropriate, are depreciated over their useful life. Reserves are not reduced by potential claims for recovery and are not discounted. Claims for recovery are recognized as agreements are reached with third parties or as amounts are received. Reserves are periodically reviewed throughout the year and adjusted to reflect current remediation progress, prospective estimates of required activity, and other factors that may be relevant, including changes in technology or regulations. See Note 18 for additional information regarding the Company’s outstanding environmental and litigation reserves. Revenue recognition The Company’s revenues are comprised of product and service sales, including products and services provided under long-term agreements with its customers. All revenue is recognized when the Company satisfies its performance obligations under the contract, either implicit or explicit, by transferring the promised product or rendering a service to its customer either when or as its customer obtains control of the product or the service is rendered. Deferred revenue consists of customer billings or payments received for which the revenue recognition criteria have not yet been met as well as contract liabilities (billings in excess of costs) on over time contracts. Advance payments from customers typically relate to contracts for which the Company has significantly fulfilled its obligations, but due to the Company’s continuing involvement with the project, revenue is precluded from being recognized until the performance obligation is met for the customer. See Note 3 for additional information. Product warranty The Company maintains a current warranty liability for the repair or replacement of defective products. For certain manufactured products, an accrual is made on a monthly basis as a percentage of cost of sales based upon historical experience. For long-lived construction products, a warranty is established when the claim is known and quantifiable. The product warranty accrual is periodically adjusted based on the identification or resolution of known individual product warranty claims or due to changes in the Company’s historical warranty experience. As of December 31, 2019 and 2018, the product warranty reserve was $1,222 and $2,057, respectively. See Note 18 for additional information regarding the product warranty. Income taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases. Deferred taxes are measured using enacted tax laws and rates expected to be in effect when such differences are recovered or settled. The effect of a change in tax rates on deferred taxes is recognized in income in the period that includes the enactment date of the change. The Company has also elected to record global intangible low-taxed income (“GILTI”) as period costs if and when incurred. The Company makes judgments regarding the recognition of deferred tax assets and the future realization of these assets. As prescribed by the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Codification (“ASC”) 740, “Income Taxes” and applicable guidance, valuation allowances must be provided for those deferred tax assets for which it is more likely than not (a likelihood of more than 50%) that some portion or all of the deferred tax assets will not be realized. The guidance requires the Company to evaluate positive and negative evidence regarding the recoverability of deferred tax assets. The determination of whether the positive evidence outweighs the negative evidence and quantification of the valuation allowance requires the Company to make estimates and judgments of future financial results. The Company has concluded that for purposes of quantifying valuation allowances, it would be appropriate to consider the reversal of taxable temporary differences related to indefinite-lived intangible assets when assessing the realizability of deferred tax assets that upon reversal, would give rise to operating losses that do not expire. The Company evaluates all tax positions taken on its federal, state, and foreign tax filings to determine if the position is more likely than not to be sustained upon examination. For positions that meet the more likely than not to be sustained criteria, the largest amount of benefit to be realized upon ultimate settlement is determined on a cumulative probability basis. A previously recognized tax position is derecognized when it is subsequently determined that a tax position no longer meets the more likely than not threshold to be sustained. The evaluation of the sustainability of a tax position and the expected tax benefit is based on judgment, historical experience, and various other assumptions. Actual results could differ from those estimates upon subsequent resolution of identified matters. The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. Foreign currency translation The assets and liabilities of our foreign subsidiaries are measured using the local currency as the functional currency and are translated into U.S. dollars at exchange rates as of the balance sheet date. Income statement amounts are translated at the weighted-average rates of exchange during the year. The translation adjustment is accumulated as a separate component of “Accumulated other comprehensive loss” within our Consolidated Balance Sheets. Foreign currency transaction gains and losses are included in “Other income or expense.” For the years ended December 31, 2019 and 2018, foreign currency transaction losses of approximately $202 and gains of $483, respectively, were included in “Other expense (income) - net” in the Consolidated Statements of Operations. Research and development The Company expenses research and development costs as costs are incurred. For the years ended December 31, 2019 and 2018, research and development expenses were $2,614 and $2,646, respectively, and were principally related to the Company’s friction management and railroad monitoring system products within the Rail Products and Services segment. Reclassifications Certain accounts in the prior year consolidated financial statements have been reclassified for comparative purposes principally to conform to the presentation in the current year period. Recently issued accounting guidance In August 2018, the FASB issued Accounting Standards Update (“ASU”) 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software” (“ASU 2018-15”). ASU 2018-15 requires capitalization of certain implementation costs incurred in a cloud computing arrangement that is a service contract. The amendments in ASU 20118-15 are effective for fiscal years beginning after December 15, 2019 and for interim periods therein with early adoption permitted. The Company evaluated the potential impact of ASU 2018-15 on its consolidated financial position, results of operations, and cash flows and anticipates the adoption will have an immaterial effect on the Company’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326) Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 added a new impairment model (known as the current expected credit loss (“CECL”) model) that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The CECL model applies to trade receivables, other receivables, and most debt instruments. The CECL model does not have a minimum threshold for recognition of impairment losses, and entities will need to measure expected credit losses on assets that have a low risk of loss. The new standard will become effective for the Company January 1, 2020 and will be applied using the modified retrospective basis. The Company anticipates the adoption of this standard will not have a material impact on the Company’s Consolidated Financial Statements. Recently adopted accounting guidance In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). The new accounting requirements include the accounting for, presentation of, and classification of leases. The guidance resulted in most leases being capitalized as a right-of-use asset with a related balance sheet liability. The requirements of the new standard are effective for annual reporting periods beginning after December 15, 2018, and interim periods within those annual periods. The Company adopted the provisions of ASU 2016-02 on January 1, 2019, using the modified retrospective approach as of the beginning of the period of adoption. Additionally, the Company has elected to apply the practical expedients for leases that commenced prior to the effective date, not to apply the recognition requirements in the standard to short-term leases, and not to separate non-lease components from lease components. The Company has presented the disclosures required by ASU 2016-02 in Note 8.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Business Segments	Business Segments The Company is a leading manufacturer and distributor of products and provider of services for transportation and energy infrastructure with locations in North America and Europe. The Company is organized and operates in three different operating segments: the Rail Products and Services segment, the Construction Products segment, and the Tubular and Energy Services segment. The segments represent components of the Company (a) that engage in activities from which revenue is generated and expenses are incurred; (b) whose operating results are regularly reviewed by the Chief Operating Decision Maker (“CODM”), who makes decisions about resources to be allocated to the segments, and (c) for which discrete financial information is available. Operating segments are evaluated on their segment profit contribution to the Company’s consolidated results. Other income and expenses, interest, income taxes, and certain other items are managed on a consolidated basis. The Company markets its products directly in all major industrial areas of the United States, Canada, and Europe, primarily through an internal sales force. The Company’s Rail Products and Services segment provides a full line of new and used rail, trackwork, and accessories to railroads, mines, and other customers in the rail industry. The Rail Products and Services segment also designs and produces insulated rail joints, power rail, track fasteners, concrete railroad ties, coverboards, and special accessories for mass transit and other rail systems. In addition, the Rail Products and Services segment engineers, manufactures, and assembles friction management products and railway wayside data collection, application systems, railroad condition monitoring systems and equipment, wheel impact load detection, fire protection systems, and management systems. The Company’s Construction Products segment sells and rents steel sheet piling, H-bearing pile, and other piling products for foundation and earth retention requirements. The Construction Products segment also sells bridge decking, bridge railing, structural steel fabrications, expansion joints, bridge forms, and other products for highway construction and repair. Lastly, the Construction Products segment produces precast concrete buildings and a variety of specialty precast concrete products. The Company’s Tubular and Energy Services segment provides pipe coatings for natural gas pipelines and utilities, upstream test and inspection services, precision measurement systems for the oil and gas market, and produces threaded pipe products for the oil and gas markets as well as industrial water well and irrigation markets. The following table illustrates net sales, profit, assets, depreciation/amortization, and expenditures for long-lived assets of the Company by segment. Segment profit from operations includes allocated corporate operating expenses. Operating expenses related to corporate headquarter functions that directly support the segment activity were allocated based on segment headcount, revenue contribution, or activity of the business units within the segments, based on the corporate activity type provided to the segment. The expense allocation excludes certain corporate costs that are separately managed from the segments. Management believes the allocation of corporate operating expenses provides an accurate presentation of how the segments utilize corporate support activities. This provides the CODM a meaningful segment profitability reporting to support operating decisions and the allocation of resources. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies found in Note 1. The operating results and assets of the Company’s operating segments were as follows as of and for the year ended December 31, 2019: Net Sales Segment Profit Segment Assets Depreciation/Amortization Expenditures for Long-Lived Assets Rail Products and Services $ 321,808 $ 19,641 $ 186,323 $ 6,469 $ 2,293 Construction Products 182,486 5,726 83,049 1,660 1,266 Tubular and Energy Services 150,763 11,147 77,320 8,174 4,920 Total $ 655,057 $ 36,514 $ 346,692 $ 16,303 $ 8,479 The operating results and assets of the Company’s operating segments were as follows as of and for the year ended December 31, 2018: Net Sales Segment Profit Segment Assets Depreciation/Amortization Expenditures for Long-Lived Assets Rail Products and Services $ 319,524 $ 19,468 $ 175,704 $ 6,810 $ 941 Construction Products 158,653 6,798 97,133 1,728 796 Tubular and Energy Services 148,792 12,647 90,402 8,790 3,212 Total $ 626,969 $ 38,913 $ 363,239 $ 17,328 $ 4,949 During 2019 and 2018, no single customer accounted for more than 10% of the Company’s consolidated net sales. Sales between segments were immaterial. Reconciliations of reportable segment net sales, profits, assets, depreciation/amortization, and expenditures for long-lived assets to the Company’s consolidated totals are as follows as of and for the years ended December 31: 2019 2018 Income from Operations: Total segment profit $ 36,514 $ 38,913 Interest expense - net (4,920) (6,154) Other (expense) income (4,492) 461 Concrete Tie Settlement expense (Note 18) — (43,400) Corporate expense and other unallocated charges (9,705) (16,531) Income (loss) before income taxes $ 17,397 $ (26,711) Assets: Total segment assets $ 346,692 $ 363,239 Unallocated corporate assets 58,479 20,010 Assets $ 405,171 $ 383,249 Depreciation/Amortization: Total segment depreciation/amortization $ 16,303 $ 17,328 Other 1,328 1,265 Depreciation/amortization $ 17,631 $ 18,593 Expenditures for Long-Lived Assets: Total segment expenditures for long-lived assets $ 8,479 $ 4,949 Other expenditures for long-lived assets 352 302 Expenditures for long-lived assets $ 8,831 $ 5,251 The following table summarizes the Company’s sales by major geographic region in which the Company had operations for the years ended December 31: 2019 2018 United States $ 529,363 $ 484,907 United Kingdom 41,879 66,451 Canada 57,574 42,810 Other 26,241 32,801 Total net sales $ 655,057 $ 626,969 The following table summarizes the Company’s long-lived assets by geographic region as of December 31: 2019 2018 United States $ 77,101 $ 81,135 Canada 3,590 4,036 United Kingdom 1,610 1,671 Other 13 15 Total property, plant, and equipment - net $ 82,314 $ 86,857 The following table summarizes the Company’s sales by major product line for the years ended December 31: 2019 2018 Rail Products $ 194,464 $ 188,590 Rail Technologies 127,344 130,934 Piling and Fabricated Bridge Products 114,076 102,246 Protective Coatings and Measurement Systems 99,760 89,026 Precast Concrete Products 68,410 56,407 Test, Inspection, and Threading Services 51,003 59,766 Total net sales $ 655,057 $ 626,969

Revenue

Revenue	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The Company’s revenues are comprised of product and service sales, including products and services provided under long-term agreements with its customers. All revenue is recognized when the Company satisfies its performance obligations under the contract, either implicit or explicit, by transferring the promised product or rendering a service to its customer either when or as its customer obtains control of the product or as the service is rendered. A performance obligation is a promise in a contract to transfer a distinct product or render a specific service to a customer. A contract’s transaction price is allocated to each distinct performance obligation. The majority of the Company’s contracts have a single performance obligation, as the promise to transfer products or render services is not separately identifiable from other promises in the contract and, therefore, not distinct. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products or providing services. Revenue is recorded net of returns, allowances, customer discounts, and incentives. Sales, value added, and other taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis. Shipping and handling costs are included in cost of goods sold. The Company’s performance obligations under long-term agreements with its customers are generally satisfied as over time. Over time revenue is primarily comprised of transit infrastructure projects within Rail Products and Rail Technologies, long-term bridge projects within Piling and Fabricated Bridge Products, precast concrete buildings within Precast Concrete Products, and custom precision metering systems within Protective Coatings and Measurement Systems. Revenue from products or services provided to customers over time accounted for 28.5% and 26.0% of revenue for the years ended December 31, 2019 and 2018, respectively. Revenue under these long-term agreements is generally recognized over time either using an input measure based upon the proportion of actual costs incurred to estimated total project costs or an input measure based upon actual labor costs as a percentage of estimated total labor costs, depending upon which measure the Company believes best depicts the Company’s performance to date under the terms of the contract. Revenue recognized over time using an input measure was $136,014 and $121,919 for the years ended December 31, 2019 and 2018, respectively. A certain portion of the Company’s revenue recognized over time under these long-term agreements is recognized using an output method, specifically units delivered, based upon certain customer acceptance and delivery requirements. Revenue recognized over time using an output measure was $50,761 and $41,334 for the years ended December 31, 2019 and 2018, respectively. As of December 31, 2019 and 2018, the Company had contract assets of $37,032 and $26,692, respectively, that were recorded in “Inventories - net” within the Consolidated Balance Sheets. As of December 31, 2019 and 2018, the Company had contract liabilities of $4,472 and $1,505, respectively, that were recorded in “Deferred revenue” within the Consolidated Balance Sheets. Accounting for these long-term agreements involves the use of various techniques to estimate total revenues and costs. The Company estimates profit on these long-term agreements as the difference between total estimated revenues and expected costs to complete a contract and recognizes that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that may span several years. These assumptions include, among other things, labor productivity, cost and availability of materials, and timing of funding by customers. The nature of these long-term agreements may give rise to several types of variable consideration, such as claims, awards, and incentive fees. Historically, these amounts of variable consideration have not been considered significant. Contract estimates may include additional revenue for submitted contract modifications if there exists an enforceable right to the modification, the amount can be reasonably estimated, and its realization is probable. These estimates are based on historical collection experience, anticipated performance, and the Company’s best judgment at that time. These amounts are generally included in the contract’s transaction price and are allocated over the remaining performance obligations. Changes in judgments related to the estimates above could impact the timing and amount of revenue recognized and, accordingly, the timing and amount of associated income. In the event that a contract loss becomes known, the entire amount of the estimated loss is recognized in the Consolidated Statements of Operations. The majority of the Company’s revenue is from products transferred and services rendered to customers at a point in time, which is inherent in all major product and service categories. Point in time revenue accounted for 71.5% and 74.0% of revenue for the years ended December 31, 2019 and 2018, respectively. The Company recognizes revenue at the point in time in which the customer obtains control of the product or service, which is generally when product title passes to the customer upon shipment or the service has been rendered to the customer. In limited cases, title does not transfer and revenue is not recognized until the customer has received the products at a designated physical location. The following table summarizes the Company’s net sales by major product and service category: December 31, 2019 2018 Rail Products $ 194,464 $ 188,590 Rail Technologies 127,344 130,934 Rail Products and Services 321,808 319,524 Piling and Fabricated Bridge Products 114,076 102,246 Precast Concrete Products 68,410 56,407 Construction Products 182,486 158,653 Test, Inspection, and Threading Services 51,003 59,766 Protective Coatings and Measurement Systems 99,760 89,026 Tubular and Energy Services 150,763 148,792 Total net sales $ 655,057 $ 626,969 For the years ended December 31, 2019 and 2018, net sales by the timing of the transfer of goods and services are as follows: Year ended December 31, 2019 Rail Products Construction Tubular and Total Point in time $ 240,047 $ 115,590 $ 112,645 $ 468,282 Over time 81,761 66,896 38,118 186,775 Total net sales $ 321,808 $ 182,486 $ 150,763 $ 655,057 Year ended December 31, 2018 Rail Products Construction Tubular and Total Point in time $ 232,814 $ 106,168 $ 124,734 $ 463,716 Over time 86,710 52,485 24,058 163,253 Total net sales $ 319,524 $ 158,653 $ 148,792 $ 626,969 The timing of revenue recognition, billings, and cash collections results in billed receivables, costs in excess of billings (contract assets, included in “Inventories - net”), and billings in excess of costs (contract liabilities, included in “Deferred revenue”) on the Consolidated Balance Sheets. Significant changes in contract assets during the year ended December 31, 2019 and 2018 included transfers to receivables from contract assets recognized at the beginning of the period of $24,487 and $18,941, respectively. Significant changes in contract liabilities during the year ended December 31, 2019 and 2018 included increases of $4,358 and $1,447, respectively, due to billings in excess of costs, excluding amounts recognized as revenue during the period. Contract liabilities were reduced due to revenue recognized during the year ended December 31, 2019 and 2018 of $1,462 and $1,141, respectively, that were included in the contract liabilities at the beginning of the respective period. As of December 31, 2019, the Company had approximately $230,067 of remaining performance obligations, which is also referred to as backlog. Approximately 8.3% of the backlog as of December 31, 2019 was related to projects that are anticipated to extend beyond December 31, 2020.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets As of December 31, 2019 and 2018, the following table represents the goodwill balance by reportable segment: Rail Products Construction Tubular and Total Balance as of December 31, 2018: $ 14,111 $ 5,147 $ — $ 19,258 Foreign currency translation impact 307 — — 307 Balance as of December 31, 2019: $ 14,418 $ 5,147 $ — $ 19,565 As of December 31, 2019 and 2018, the components of the Company’s intangible assets were as follows: December 31, 2019 Weighted Average Gross Accumulated Net Non-compete agreements 4 $ 1,272 $ (1,259) $ 13 Patents 10 377 (188) 189 Customer relationships 18 37,498 (13,945) 23,553 Trademarks and trade names 16 7,787 (3,551) 4,236 Technology 13 35,728 (20,205) 15,523 $ 82,662 $ (39,148) $ 43,514 December 31, 2018 Weighted Average Gross Accumulated Net Non-compete agreements 4 $ 1,372 $ (1,046) $ 326 Patents 10 358 (165) 193 Customer relationships 18 37,129 (11,388) 25,741 Trademarks and trade names 15 8,481 (3,416) 5,065 Technology 14 35,640 (17,129) 18,511 $ 82,980 $ (33,144) $ 49,836 Intangible assets are amortized over their useful lives ranging from 4 to 25 years, with a total weighted average amortization period of approximately 16 years. Amortization expense for the years ended December 31, 2019 and 2018 was $6,577 and $7,098, respectively. During the years ended December 31, 2019 and 2018 certain fully amortized intangible assets of $124 and $2,830, respectively, related to non-compete agreements and $723 and $1,560, respectively, related to trademarks and trade names were eliminated from gross intangible assets and accumulated amortization. Estimated annual amortization expense for the years ending December 31, 2020 and thereafter is as follows: Year Ending December 31, 2020 $ 5,910 2021 5,875 2022 5,791 2023 5,314 2024 4,288 2025 and thereafter 16,336 $ 43,514

Accounts Receivable

Accounts Receivable	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Accounts Receivable	Accounts Receivable Accounts receivable as of December 31, 2019 and 2018 are summarized as follows: December 31, 2019 2018 Accounts receivable $ 79,675 $ 87,055 Allowance for doubtful accounts (1,100) (932) Accounts receivable - net $ 78,575 $ 86,123 Changes in reserves for uncollectible accounts are recorded as part of “Selling and administrative expenses” in the Consolidated Statements of Operations, and were income of $48 and $1,443 for the years ended December 31, 2019 and 2018, respectively. The Company’s customers are principally in the transportation and energy infrastructure sectors. As of December 31, 2019 and 2018, trade receivables, net of allowance for doubtful accounts, from customers were as follows: December 31, 2019 2018 Rail Products and Services $ 44,941 $ 43,180 Construction Products 19,301 19,998 Tubular and Energy Services 14,205 19,121 Trade accounts receivable - net $ 78,447 $ 82,299 Credit is extended based upon an evaluation of the customer’s financial condition and, while collateral is not required, the Company periodically receives surety bonds that guarantee payment. Credit terms are consistent with industry standards and practices.

Inventory

Inventory	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory is valued at average cost or net realizable value, whichever is lower. The Company’s components of inventory as of December 31, 2019 and 2018 are summarized in the following table: December 31, 2019 2018 Finished goods $ 59,864 $ 69,041 Contract assets 37,032 26,692 Work-in-process 3,728 6,940 Raw materials 18,677 21,831 Inventories - net $ 119,301 $ 124,504

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant, and Equipment Property, plant, and equipment as of December 31, 2019 and 2018 consisted of the following: December 31, 2019 2018 Land $ 11,076 $ 12,440 Improvements to land and leaseholds 17,172 17,610 Buildings 35,241 34,608 Machinery and equipment, including equipment under finance leases 122,599 120,914 Construction in progress 5,234 3,083 Gross property, plant, and equipment 191,322 188,655 Less: accumulated depreciation and amortization, including accumulated amortization of finance leases (109,008) (101,798) Property, plant, and equipment - net $ 82,314 $ 86,857 Depreciation expense, including amortization of assets under capital leases, for the years ended December 31, 2019 and 2018 amounted to $11,054 and $11,495, respectively. During the year ended December 31, 2019, the Company sold land and building for cash proceeds of $900, resulting in a gain of $198. During the year ended December 31, 2018, the Company sold 54.5 acres of land in exchange for cash proceeds of $2,047, resulting in a loss of $269.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Leases On January 1, 2019, the Company adopted ASU 2016-02 and all related amendments using the modified retrospective approach, which resulted in an increase in assets of $13,585 and an increase in current and long-term liabilities of $3,322 and $10,263, respectively. This adoption did not affect the Company’s results of operations or cash flows. The Company determines if an arrangement is a lease at its inception. Operating leases are included in “Operating lease right-of-use assets,” “Other current liabilities,” and “Long-term operating lease liabilities” within the Company’s Consolidated Balance Sheets. Finance leases are included in “Property, plant, and equipment - net,” “Current maturities of long-term debt,” and “Long-term debt” in the Company’s Consolidated Balance Sheets. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of the lease payments. The Company uses the implicit rate when readily determinable. The operating lease right-of-use asset also includes indirect costs incurred and lease payments made prior to the commencement date, less any lease incentives received. The Company’s lease terms may include options to extend or terminate the lease and will be recognized when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components that it accounts for as a single lease component. Also, for certain equipment leases, the Company applies a portfolio approach to effectively account for the operating lease right-of-use assets and liabilities. Finance lease and lessor accounting recognition has remained substantially unchanged under ASU 2016-02. The adoption of ASU 2016-02 had no impact on the Company’s balance sheet, results of operations, or cash flows for finance leases. The Company has operating and finance leases for manufacturing facilities, corporate offices, sales offices, vehicles, and certain equipment. As of December 31, 2019, its leases had remaining lease terms of 1 to 12 years, some of which include options to extend the leases for up to 12 years, and some of which include options to terminate the leases within 1 year. As of December 31, 2019, the Company’s operating leases had a weighted average remaining lease term of 7 years and a weighted average discount rate of 5.1%. As of December 31, 2019, the Company’s finance leases had a weighted average remaining lease term of 1 year and a weighted average discount rate of 4.3%. The balance sheet components of the Company’s leases were as follows as of December 31, 2019: December 31, 2019 Operating leases Operating lease right-of-use assets $ 13,274 Other current liabilities $ 3,006 Long-term operating lease liabilities 10,268 Total operating lease liabilities $ 13,274 Finance leases Property, plant, and equipment $ 3,518 Accumulated amortization (2,943) Property, plant, and equipment - net $ 575 Current maturities of long-term debt $ 405 Long-term debt 170 Total finance lease liabilities $ 575 The components of lease expense within the Company’s Consolidated Statements of Operations were as follows for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Finance lease cost: Amortization of finance leases $ 722 $ 731 Interest on lease liabilities 57 50 Operating lease cost 3,930 4,825 Sublease income (18) (37) Total lease cost $ 4,691 $ 5,569 The cash flow components of the Company’s leases were as follows for the year ended December 31, 2019: Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (4,676) Financing cash flows from finance leases (722) Right-of-use assets obtained in exchange for new lease liabilities: Operating leases $ 3,619 As of December 31, 2019, estimated annual maturities of lease liabilities for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, Operating Leases Finance Leases 2020 $ 3,351 $ 450 2021 2,384 131 2022 1,852 47 2023 1,640 17 2024 1,540 11 2025 and there after 4,033 — 14,800 656 Interest (1,526) (81) Total $ 13,274 $ 575
Leases	Leases On January 1, 2019, the Company adopted ASU 2016-02 and all related amendments using the modified retrospective approach, which resulted in an increase in assets of $13,585 and an increase in current and long-term liabilities of $3,322 and $10,263, respectively. This adoption did not affect the Company’s results of operations or cash flows. The Company determines if an arrangement is a lease at its inception. Operating leases are included in “Operating lease right-of-use assets,” “Other current liabilities,” and “Long-term operating lease liabilities” within the Company’s Consolidated Balance Sheets. Finance leases are included in “Property, plant, and equipment - net,” “Current maturities of long-term debt,” and “Long-term debt” in the Company’s Consolidated Balance Sheets. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of the lease payments. The Company uses the implicit rate when readily determinable. The operating lease right-of-use asset also includes indirect costs incurred and lease payments made prior to the commencement date, less any lease incentives received. The Company’s lease terms may include options to extend or terminate the lease and will be recognized when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components that it accounts for as a single lease component. Also, for certain equipment leases, the Company applies a portfolio approach to effectively account for the operating lease right-of-use assets and liabilities. Finance lease and lessor accounting recognition has remained substantially unchanged under ASU 2016-02. The adoption of ASU 2016-02 had no impact on the Company’s balance sheet, results of operations, or cash flows for finance leases. The Company has operating and finance leases for manufacturing facilities, corporate offices, sales offices, vehicles, and certain equipment. As of December 31, 2019, its leases had remaining lease terms of 1 to 12 years, some of which include options to extend the leases for up to 12 years, and some of which include options to terminate the leases within 1 year. As of December 31, 2019, the Company’s operating leases had a weighted average remaining lease term of 7 years and a weighted average discount rate of 5.1%. As of December 31, 2019, the Company’s finance leases had a weighted average remaining lease term of 1 year and a weighted average discount rate of 4.3%. The balance sheet components of the Company’s leases were as follows as of December 31, 2019: December 31, 2019 Operating leases Operating lease right-of-use assets $ 13,274 Other current liabilities $ 3,006 Long-term operating lease liabilities 10,268 Total operating lease liabilities $ 13,274 Finance leases Property, plant, and equipment $ 3,518 Accumulated amortization (2,943) Property, plant, and equipment - net $ 575 Current maturities of long-term debt $ 405 Long-term debt 170 Total finance lease liabilities $ 575 The components of lease expense within the Company’s Consolidated Statements of Operations were as follows for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Finance lease cost: Amortization of finance leases $ 722 $ 731 Interest on lease liabilities 57 50 Operating lease cost 3,930 4,825 Sublease income (18) (37) Total lease cost $ 4,691 $ 5,569 The cash flow components of the Company’s leases were as follows for the year ended December 31, 2019: Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (4,676) Financing cash flows from finance leases (722) Right-of-use assets obtained in exchange for new lease liabilities: Operating leases $ 3,619 As of December 31, 2019, estimated annual maturities of lease liabilities for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, Operating Leases Finance Leases 2020 $ 3,351 $ 450 2021 2,384 131 2022 1,852 47 2023 1,640 17 2024 1,540 11 2025 and there after 4,033 — 14,800 656 Interest (1,526) (81) Total $ 13,274 $ 575

Deferred Revenue

Deferred Revenue	12 Months Ended
	Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]
Deferred Revenue	Revenue The Company’s revenues are comprised of product and service sales, including products and services provided under long-term agreements with its customers. All revenue is recognized when the Company satisfies its performance obligations under the contract, either implicit or explicit, by transferring the promised product or rendering a service to its customer either when or as its customer obtains control of the product or as the service is rendered. A performance obligation is a promise in a contract to transfer a distinct product or render a specific service to a customer. A contract’s transaction price is allocated to each distinct performance obligation. The majority of the Company’s contracts have a single performance obligation, as the promise to transfer products or render services is not separately identifiable from other promises in the contract and, therefore, not distinct. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products or providing services. Revenue is recorded net of returns, allowances, customer discounts, and incentives. Sales, value added, and other taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis. Shipping and handling costs are included in cost of goods sold. The Company’s performance obligations under long-term agreements with its customers are generally satisfied as over time. Over time revenue is primarily comprised of transit infrastructure projects within Rail Products and Rail Technologies, long-term bridge projects within Piling and Fabricated Bridge Products, precast concrete buildings within Precast Concrete Products, and custom precision metering systems within Protective Coatings and Measurement Systems. Revenue from products or services provided to customers over time accounted for 28.5% and 26.0% of revenue for the years ended December 31, 2019 and 2018, respectively. Revenue under these long-term agreements is generally recognized over time either using an input measure based upon the proportion of actual costs incurred to estimated total project costs or an input measure based upon actual labor costs as a percentage of estimated total labor costs, depending upon which measure the Company believes best depicts the Company’s performance to date under the terms of the contract. Revenue recognized over time using an input measure was $136,014 and $121,919 for the years ended December 31, 2019 and 2018, respectively. A certain portion of the Company’s revenue recognized over time under these long-term agreements is recognized using an output method, specifically units delivered, based upon certain customer acceptance and delivery requirements. Revenue recognized over time using an output measure was $50,761 and $41,334 for the years ended December 31, 2019 and 2018, respectively. As of December 31, 2019 and 2018, the Company had contract assets of $37,032 and $26,692, respectively, that were recorded in “Inventories - net” within the Consolidated Balance Sheets. As of December 31, 2019 and 2018, the Company had contract liabilities of $4,472 and $1,505, respectively, that were recorded in “Deferred revenue” within the Consolidated Balance Sheets. Accounting for these long-term agreements involves the use of various techniques to estimate total revenues and costs. The Company estimates profit on these long-term agreements as the difference between total estimated revenues and expected costs to complete a contract and recognizes that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that may span several years. These assumptions include, among other things, labor productivity, cost and availability of materials, and timing of funding by customers. The nature of these long-term agreements may give rise to several types of variable consideration, such as claims, awards, and incentive fees. Historically, these amounts of variable consideration have not been considered significant. Contract estimates may include additional revenue for submitted contract modifications if there exists an enforceable right to the modification, the amount can be reasonably estimated, and its realization is probable. These estimates are based on historical collection experience, anticipated performance, and the Company’s best judgment at that time. These amounts are generally included in the contract’s transaction price and are allocated over the remaining performance obligations. Changes in judgments related to the estimates above could impact the timing and amount of revenue recognized and, accordingly, the timing and amount of associated income. In the event that a contract loss becomes known, the entire amount of the estimated loss is recognized in the Consolidated Statements of Operations. The majority of the Company’s revenue is from products transferred and services rendered to customers at a point in time, which is inherent in all major product and service categories. Point in time revenue accounted for 71.5% and 74.0% of revenue for the years ended December 31, 2019 and 2018, respectively. The Company recognizes revenue at the point in time in which the customer obtains control of the product or service, which is generally when product title passes to the customer upon shipment or the service has been rendered to the customer. In limited cases, title does not transfer and revenue is not recognized until the customer has received the products at a designated physical location. The following table summarizes the Company’s net sales by major product and service category: December 31, 2019 2018 Rail Products $ 194,464 $ 188,590 Rail Technologies 127,344 130,934 Rail Products and Services 321,808 319,524 Piling and Fabricated Bridge Products 114,076 102,246 Precast Concrete Products 68,410 56,407 Construction Products 182,486 158,653 Test, Inspection, and Threading Services 51,003 59,766 Protective Coatings and Measurement Systems 99,760 89,026 Tubular and Energy Services 150,763 148,792 Total net sales $ 655,057 $ 626,969 For the years ended December 31, 2019 and 2018, net sales by the timing of the transfer of goods and services are as follows: Year ended December 31, 2019 Rail Products Construction Tubular and Total Point in time $ 240,047 $ 115,590 $ 112,645 $ 468,282 Over time 81,761 66,896 38,118 186,775 Total net sales $ 321,808 $ 182,486 $ 150,763 $ 655,057 Year ended December 31, 2018 Rail Products Construction Tubular and Total Point in time $ 232,814 $ 106,168 $ 124,734 $ 463,716 Over time 86,710 52,485 24,058 163,253 Total net sales $ 319,524 $ 158,653 $ 148,792 $ 626,969 The timing of revenue recognition, billings, and cash collections results in billed receivables, costs in excess of billings (contract assets, included in “Inventories - net”), and billings in excess of costs (contract liabilities, included in “Deferred revenue”) on the Consolidated Balance Sheets. Significant changes in contract assets during the year ended December 31, 2019 and 2018 included transfers to receivables from contract assets recognized at the beginning of the period of $24,487 and $18,941, respectively. Significant changes in contract liabilities during the year ended December 31, 2019 and 2018 included increases of $4,358 and $1,447, respectively, due to billings in excess of costs, excluding amounts recognized as revenue during the period. Contract liabilities were reduced due to revenue recognized during the year ended December 31, 2019 and 2018 of $1,462 and $1,141, respectively, that were included in the contract liabilities at the beginning of the respective period. As of December 31, 2019, the Company had approximately $230,067 of remaining performance obligations, which is also referred to as backlog. Approximately 8.3% of the backlog as of December 31, 2019 was related to projects that are anticipated to extend beyond December 31, 2020.

Long-Term Debt and Related Matt

Long-Term Debt and Related Matters	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt and Related Matters	Long-Term Debt and Related Matters Long-term debt as of December 31, 2019 and 2018 consisted of the following: December 31, 2019 2018 Revolving credit facility with an interest rate of 4.28% as of December 31, 2019 and 4.80% as of December 31, 2018 $ 33,868 $ 74,008 Term loan payable in quarterly installments through April 30, 2024 with an interest rate of 4.19% at December 31, 2019 23,750 — Lease obligations payable in installments through 2024 with a weighted average interest rate of 3.63% as of December 31, 2019 and 3.32% as of December 31, 2018 575 974 Total debt 58,193 74,982 Less: current maturities (2,905) (629) Long-term portion $ 55,288 $ 74,353 The expected maturities of long-term debt for December 31, 2020 and thereafter are as follows: Year Ending December 31, 2020 $ 2,905 2021 2,604 2022 2,545 2023 2,510 2024 47,629 2025 and thereafter — Total $ 58,193 Borrowings On April 30, 2019, the Company, its domestic subsidiaries, and certain of its Canadian and European subsidiaries (collectively, the “Borrowers”), entered into the Third Amended and Restated Credit Agreement (“Amended Credit Agreement”) with PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank, N.A., and BMO Harris Bank, N.A. This Amended Credit Agreement modifies the prior revolving credit facility, which had a maximum credit line of $195,000 and extends the maturity date from March 13, 2020 to April 30, 2024. The Amended Credit Agreement provides for a five-year, revolving credit facility that permits aggregate borrowings of the Borrowers up to $140,000 with a sublimit of the equivalent of $25,000 U.S. dollars that is available to the Canadian and United Kingdom borrowers in the aggregate. The Amended Credit Agreement’s incremental loan feature permits the Company to increase the available revolving borrowings under the facility by up to an additional $50,000 and provides for additional term loan borrowings of up to $25,000 subject to the Company’s receipt of increased commitments from existing or new lenders and the satisfaction of certain conditions. The Company’s and the domestic, Canadian, and United Kingdom guarantors’ (the “Guarantors”) obligations under the Amended Credit Agreement are secured by the grant of a security interest by the Borrowers and Guarantors in substantially all of the personal property owned by such entities. Additionally, the equity interests in each of the loan parties, other than the Company, and the equity interests held by each loan party in their domestic subsidiaries, have been pledged to the lenders as collateral for the lending obligations. Borrowings under the Amended Credit Agreement bear interest at rates based upon either the base rate or Euro-rate plus applicable margins. Applicable margins are dictated by the ratio of the Company’s total net indebtedness to the Company’s consolidated EBITDA for four trailing quarters, as defined in the Amended Credit Agreement. The base rate is the highest of (a) the Overnight Bank Funding Rate plus 50 basis points, (b) the Prime Rate, or (c) the Daily Euro-rate plus 100 basis points (each as defined in the Amended Credit Agreement). The base rate and Euro-rate spreads range from 25 to 125 basis points and 125 to 225 basis points, respectively. The Amended Credit Agreement includes three financial covenants: (a) Maximum Gross Leverage Ratio, defined as the Company’s consolidated Indebtedness divided by the Company’s consolidated EBITDA, which must not exceed (i) 3.25 to 1.00 for all testing periods other than during an Acquisition Period, as defined in the Amended Credit Agreement, and (ii) 3.50 to 1.00 for all testing periods occurring during an Acquisition Period; (b) Minimum Consolidated Fixed Charge Coverage Ratio, defined as the Company’s consolidated EBITDA divided by the Company’s Fixed Charges, as defined in the Amended Credit Agreement, which must be a minimum of 1.25 to 1.00; and (c) Minimum Working Capital to Revolving Facility Usage Ratio, defined as the sum of the inventory and accounts receivable of the Borrowers and certain other Guarantors divided by the Revolving Facility Usage, as defined in the Amended Credit Agreement, which must be a minimum of 1.40 to 1.00. As of December 31, 2019, the Company was in compliance with the covenants in the Amended Credit Agreement. As of December 31, 2019 and 2018, the Company had outstanding letters of credit of approximately $492 and $425, respectively, and had net available borrowing capacity of $105,640 and $120,567, respectively. United Kingdom On April 29,2019, a subsidiary of the Company terminated a credit facility with NatWest Bank used for its United Kingdom operations. The facility had included an overdraft availability of £1,500 pounds sterling (approximately $1,924 as of December 31, 2018). There were no outstanding borrowings under this credit facility as of December 31, 2018, however, there were $318 in outstanding guarantees (as defined in the underlying agreement) as of December 31, 2018. The subsidiary had available borrowing capacity of $1,606 as of December 31, 2018.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Stockholders' Equity	Stockholders’ EquityThe Company had authorized shares of 20,000,000 in common stock with 11,115,779 shares issued as of December 31, 2019 and 2018. The common stock has a par value of $0.01 per share and the Company suspended its dividend payments during each year ended December 31, 2019 and 2018, respectively. As of December 31, 2019 and 2018, the Company withheld 34,198 and 11,445 shares for approximately $620 and $316, respectively, from employees to pay their withholding taxes in connection with the vesting of restricted stock awards. There were no shares repurchased or dividends declared during the years ended December 31, 2019 and 2018. Common Stock Treasury Outstanding (Number of Shares) Balance at end of 2017 775,203 10,340,576 Issued for stock-based compensation plans (25,431) 25,431 Balance at end of 2018 749,772 10,366,007 Issued for stock-based compensation plans (56,084) 56,084 Balance at end of 2019 693,688 10,422,091 The components of accumulated other comprehensive loss, net of tax, for the years ended December 31, 2019 and 2018, were as follows: December 31, 2019 2018 Pension and post-retirement benefit plan adjustments $ (2,959) $ (3,839) Unrealized (loss) gain on interest rate swap contracts (230) 675 Foreign currency translation adjustments (16,994) (19,027) Accumulated other comprehensive loss $ (20,183) $ (22,191) Foreign currency translation adjustments are generally not adjusted for income taxes as they relate to indefinite investments in non-U.S. subsidiaries. See Note 14 for further information.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	Stockholders’ EquityThe Company had authorized shares of 20,000,000 in common stock with 11,115,779 shares issued as of December 31, 2019 and 2018. The common stock has a par value of $0.01 per share and the Company suspended its dividend payments during each year ended December 31, 2019 and 2018, respectively. As of December 31, 2019 and 2018, the Company withheld 34,198 and 11,445 shares for approximately $620 and $316, respectively, from employees to pay their withholding taxes in connection with the vesting of restricted stock awards. There were no shares repurchased or dividends declared during the years ended December 31, 2019 and 2018. Common Stock Treasury Outstanding (Number of Shares) Balance at end of 2017 775,203 10,340,576 Issued for stock-based compensation plans (25,431) 25,431 Balance at end of 2018 749,772 10,366,007 Issued for stock-based compensation plans (56,084) 56,084 Balance at end of 2019 693,688 10,422,091 The components of accumulated other comprehensive loss, net of tax, for the years ended December 31, 2019 and 2018, were as follows: December 31, 2019 2018 Pension and post-retirement benefit plan adjustments $ (2,959) $ (3,839) Unrealized (loss) gain on interest rate swap contracts (230) 675 Foreign currency translation adjustments (16,994) (19,027) Accumulated other comprehensive loss $ (20,183) $ (22,191) Foreign currency translation adjustments are generally not adjusted for income taxes as they relate to indefinite investments in non-U.S. subsidiaries. See Note 14 for further information.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share (Share amounts in thousands) The following table sets forth the computation of basic and diluted earnings (loss) per common share for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Numerator for basic and diluted earnings (loss) per common share: Net income (loss) $ 42,568 $ (31,168) Denominator: Weighted average shares outstanding 10,410 10,362 Denominator for basic earnings per common share 10,410 10,362 Effect of dilutive securities: Stock compensation plans 234 — Dilutive potential common shares 234 — Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions 10,644 10,362 Basic earnings (loss) per common share $ 4.09 $ (3.01) Diluted earnings (loss) per common share $ 4.00 $ (3.01) For the year ended December 31, 2018, there were 117 anti-dilutive shares that were excluded from the above calculation.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Income (loss) before income taxes, as shown in the accompanying Consolidated Statements of Operations, includes the following components for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Domestic $ 12,230 $ (34,608) Foreign 5,167 7,897 Income (loss) from operations, before income taxes $ 17,397 $ (26,711) Significant components of the provision for income taxes for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Current: Federal $ 1,909 $ 2,208 State 505 172 Foreign 1,925 3,675 Total current 4,339 6,055 Deferred: Federal (22,835) (55) State (6,173) (8) Foreign (502) (1,535) Total deferred (29,510) (1,598) Total income tax (benefit) expense $ (25,171) $ 4,457 The reconciliation of income tax computed at statutory rates to income tax expense for the years ended December 31, 2019 and 2018 is as follows: Year Ended December 31, 2019 2018 Amount Percent Amount Percent Statutory rate $ 3,653 21.0 % $ (5,609) 21.0 % Foreign tax rate differential 129 0.7 156 (0.6) State income taxes, net of federal benefit (59) (0.3) (706) 2.6 Non-deductible expenses 345 2.0 261 (1.0) Global intangible low-taxed income, net of tax credits 145 0.8 171 (0.6) Income tax credits (126) (0.7) (633) 2.4 Nondeductible executive compensation 234 1.3 351 (1.3) Tax on unremitted foreign earnings 216 1.2 149 (0.6) Change in valuation allowance (29,635) (170.3) 10,226 (38.3) Other (73) (0.4) 91 (0.3) Total income tax (benefit) expense / Effective rate $ (25,171) (144.7) % $ 4,457 (16.7) % Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2019 and 2018 were as follows: December 31, 2019 2018 Deferred tax assets: Goodwill and other intangibles $ 17,028 33 $ 18,756 Accrued settlement 10,196 11,933 Deferred compensation 3,620 2,940 Contingent liabilities 1,816 1,663 Net operating loss / tax credit carryforwards 1,438 1,602 Pension and post-retirement liability 1,414 1,524 Warranty reserve 294 346 Accounts receivable 261 214 Other 725 644 Total deferred tax assets 36,792 39,622 Less: valuation allowance (1,072) (30,707) Net deferred tax assets 35,720 8,915 Deferred tax liabilities: Goodwill and other intangibles (4,454) (5,020) Depreciation (5,946) (6,625) Inventories (946) (2,125) Unremitted earnings of foreign subsidiaries (390) (160) Other (97) (272) Total deferred tax liabilities (11,833) (14,202) Net deferred tax assets (liabilities) $ 23,887 $ (5,287) Each quarter, management reviews operations and liquidity needs in each jurisdiction to assess the Company’s intent to reinvest foreign earnings outside of the United States. As of December 31, 2019, management determined that cash balances of its Canadian and United Kingdom subsidiaries exceeded projected capital needs by $7,800. Management does not intend for such amounts to be permanently reinvested outside of the United States and has therefore accrued foreign withholding taxes of $390 as of December 31, 2019. It is management’s intent and practice to indefinitely reinvest other undistributed earnings outside of the United States. Determination of the amount of any unrecognized deferred income tax liability associated with these undistributed earnings is not practicable because of the complexities of the hypothetical calculation. A valuation allowance is required to be established or maintained when, based on currently available information and other factors, it is more likely than not that all or a portion of a deferred tax asset will not be realized. The Company has considered all available evidence, both positive and negative, in assessing the need for a valuation allowance in each jurisdiction. During 2019, the Company reversed $29,648 of its valuation allowance previously recorded against U.S. deferred tax assets. The positive evidence considered in evaluating U.S. deferred tax assets included cumulative financial income over the three-year period ended December 31, 2019, as well as the composition and reversal patterns of existing taxable and deductible temporary differences between financial reporting and tax. Based on our evaluation, the Company believed it was appropriate to rely on forecasted future taxable income to support its U.S. deferred tax assets. The amount of deferred tax assets considered realizable, however, could be adjusted if negative evidence outweighs additional subjective evidence such as our projections for growth. As of December 31, 2019 and 2018, the tax benefit of net operating loss carryforwards available for state income tax purposes was $901 and $1,253, respectively. The state net operating loss carryforwards will expire in various years through 2039. We believe it is more likely than not that a portion of the tax benefit from state operating loss carryforwards will not be realized. In recognition of this risk, we have provided a valuation allowance of $388 against deferred tax assets related to state operating loss carryforwards as of December 31, 2019. As of December 31, 2019, the Company has foreign tax credit carryforwards in the amount of $34 that will expire in 2028 through 2029. We believe it is more likely than not that the tax benefit from foreign tax credit carryforwards will not be realized. In recognition of this risk, we have provided a valuation allowance of $34 against deferred tax assets related to foreign tax credit carryforwards at December 31, 2019. As of December 31, 2019, the Company has net operating loss carryforwards in certain foreign jurisdictions of $2,019, which may be carried forward indefinitely. The foreign jurisdictions have incurred cumulative financial losses over the three-year period ended December 31, 2019 and have projected future taxable losses. We believe it is more likely than not that the tax benefit from these loss carryforwards will not be realized. In recognition of this risk, we have provided a valuation allowance of $650, collectively, against deferred tax assets in foreign jurisdictions as of December 31, 2019. The determination to record or not record a valuation allowance involves management judgment, based on the consideration of positive and negative evidence available at the time of the assessment. Management will continue to assess the realization of its deferred tax assets based upon future evidence, and may record adjustments to valuation allowances against deferred tax assets in future periods, as appropriate, that could materially impact net income. The following table provides a reconciliation of unrecognized tax benefits as of December 31, 2019 and 2018: December 31, 2019 2018 Unrecognized tax benefits at beginning of period: $ 481 $ 599 Decreases based on tax positions for prior periods (67) (118) Balance at end of period $ 414 $ 481 The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $414 as of December 31, 2019. The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. As of December 31, 2019 and 2018, the Company had accrued interest and penalties related to unrecognized tax benefits of $327 and $398, respectively. As of December 31, 2019, the Company did not expect any material increases or decreases to its unrecognized tax benefits within the next 12 months. Ultimate realization of these tax benefits is dependent upon the occurrence of certain events, including the completion of audits by tax authorities and expiration of statutes of limitations. The Company files income tax returns in the United States and in various state, local, and foreign jurisdictions. The Company is subject to federal income tax examinations for the 2016 period and thereafter. With respect to the state, local, and foreign filings, certain entities of the Company are subject to income tax examinations for the 2015 period and thereafter.

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Compensation [Abstract]
Stock-based Compensation	Stock-based Compensation The Company applies the provisions of ASC 718, “Compensation - Stock Compensation,” to account for the Company’s stock-based compensation. Stock-based compensation cost is measured at the grant date based on the calculated fair value of the award and is recognized over the employees’ requisite service period. Stock forfeitures and cancellations are recognized as they occur. The Company recorded stock-based compensation expense of $3,155 and $3,836 for the years ended December 31, 2019 and 2018, respectively, related to fully-vested stock awards, restricted stock awards, and performance unit awards. As of December 31, 2019, unrecognized compensation expense for awards the Company expects to vest approximated $3,576. The Company will recognize this unrecognized compensation expense over approximately 3.2 years. Shares issued as a result of vested stock-based compensation generally will be from previously issued shares that have been reacquired by the Company and held as Treasury stock or authorized but previously unissued common stock. As of December 31, 2019, the Company had stock awards issued pursuant to the 2006 Omnibus Incentive Plan, as amended and restated in May 2018 (“Omnibus Plan”). The Omnibus Plan allows for the issuance of 2,058,000 shares of common stock through the granting of stock options or stock awards (including performance units convertible into stock) to key employees and directors at no less than 100% of fair market value on the date of the grant. The Omnibus Plan provides for the granting of “nonqualified options” with a duration of not more than ten years from the date of grant. The Omnibus Plan also provides that, unless otherwise set forth in the option agreement, stock options are exercisable in installments of up to 25% annually beginning one year from the date of grant. No stock options have been granted under the Omnibus Plan and, as such, there was no stock-based compensation expense related to stock options recorded in 2019 or 2018. Non-Employee Director Fully-Vested and Restricted Stock Awards Prior to May 2018, non-employee directors were awarded fully-vested shares of the Company’s common stock on each date the non-employee directors were elected at the annual shareholders’ meeting to serve as directors. Since May 2018, such annual equity awards have been subject to a one-year vesting requirement. During the quarter ended June 30, 2017, the Nomination and Governance Committee and Board of Directors jointly approved the Deferred Compensation Plan for Non-Employee Directors under the Omnibus Plan, which permits non-employee directors of the Company to defer receipt of earned cash and/or stock compensation for service on the Board. The non-employee directors were granted a total of 21,532 and 24,427 fully-vested and restricted shares for the years ended December 31, 2019 and 2018, respectively. Compensation expense recorded by the Company related to such awards to non-employee directors was approximately $526 and $880 for the years ended December 31, 2019 and 2018, respectively. During 2019, 12,304 deferred share units were allotted to the accounts of the non-employee directors pursuant to the Deferred Compensation Plan for Non-Employee Directors. The weighted average fair value of all the fully-vested and restricted stock grants awarded was $24.38 and $23.64 per share for the years ended December 31, 2019 and 2018, respectively. Restricted Stock Awards and Performance Unit Awards Under the Omnibus Plan, the Company grants certain employees restricted stock and performance unit awards. The forfeitable restricted stock awards granted prior to March 2015 generally time-vest after a four three three The following table summarizes the restricted stock award, deferred stock units, and performance unit award activity for the years ended December 31, 2019 and 2018: Restricted Deferred Performance Weighted Average Outstanding as of January 1, 2018 186,806 26,860 181,341 $ 16.53 Granted 62,320 14,914 65,421 27.05 Vested (36,876) — — 28.07 Adjustment for incentive awards — — 65,491 26.93 Canceled and forfeited (20,425) — (11,880) 16.38 Outstanding as of December 31, 2018 191,825 41,774 300,373 $ 18.61 Granted 62,125 12,304 89,092 18.63 Vested (90,282) — — 19.61 Adjustment for incentive awards — — (52,180) 24.30 Canceled and forfeited (12,869) — (6,137) 20.79 Outstanding as of December 31, 2019 150,799 54,078 331,148 $ 18.50 Performance units are subject to forfeiture and will be converted into common stock of the Company based upon the Company’s performance relative to performance measures and conversion multiples as defined in the underlying plan. Performance Stock Units are adjusted to the Company’s expected performance target attainment, while the aggregate fair value in the above table is based upon achieving 100% of the performance targets as defined in the underlying plan. Excluding the fully-vested and restricted stock awards granted to non-employee directors, the Company recorded stock-based compensation expense of $2,630 and $2,956, respectively, for the periods ended December 31, 2019 and 2018 related to restricted stock and performance unit awards.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The Company has three retirement plans that cover its hourly and salaried employees in the United States: one defined benefit plan, which is frozen, and two defined contribution plans. Employees are eligible to participate in the appropriate plan based on employment classification. The Company’s contributions to the defined benefit and defined contribution plans are governed by the Employee Retirement Income Security Act of 1974 (“ERISA”) and the Company’s policy and investment guidelines of the applicable plan. The Company’s policy is to contribute at least the required minimum in accordance with the funding standards of ERISA. The Company maintains two defined contribution plans for its employees in Canada, as well as a post-retirement benefit plan. In the United Kingdom, the Company maintains two defined contribution plans and a defined benefit plan, which is frozen. These plans are discussed in further detail below. United States Defined Benefit Plan The following tables present a reconciliation of the changes in the benefit obligation, the fair market value of the assets, and the funded status of the plan, as of December 31, 2019 and 2018: December 31, 2019 2018 Changes in benefit obligation: Benefit obligation at beginning of year $ 16,717 $ 18,783 Interest cost 648 622 Actuarial loss (gain) 400 (1,249) Benefits paid (840) (1,439) Settlements $ (9,116) $ — Benefit obligation at end of year $ 7,809 $ 16,717 Change to plan assets: Fair value of assets at beginning of year $ 12,468 $ 14,892 Actual gain (loss) on plan assets 1,298 (985) Employer contribution 550 — Benefits paid (840) (1,439) Settlements (9,116) — Fair value of assets at end of year 4,360 12,468 Funded status at end of year $ (3,449) $ (4,249) Amounts recognized in the consolidated balance sheet consist of: Other long-term liabilities $ (3,449) $ (4,249) Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 1,893 $ 4,406 The actuarial loss included in accumulated other comprehensive loss that will be recognized in net periodic pension cost during 2020 is $47, before taxes. Net periodic pension costs for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Components of net periodic benefit cost: Interest cost 648 622 Expected return on plan assets (719) (853) Recognized net actuarial loss 125 96 Net periodic pension cost (income) 54 (135) Settlement charge 2,210 — Total pension expense (income) $ 2,264 $ (135) The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 4.0 % 3.4 % Expected rate of return on plan assets 5.9 % 5.9 % The expected long-term rate of return is based on numerous factors, including the target asset allocation for plan assets, historical rate of return, long-term inflation assumptions, and current and projected market conditions. Amounts applicable to the Company’s pension plan with accumulated benefit obligations in excess of plan assets were as follows as of December 31, 2019 and 2018: December 31, 2019 2018 Projected benefit obligation $ 7,809 $ 16,717 Accumulated benefit obligation 7,809 16,717 Fair value of plan assets 4,360 12,468 Plan assets consist primarily of various fixed income and equity investments. The Company’s primary investment objective is to provide long-term growth of capital while accepting a moderate level of risk. The investments are limited to cash and cash equivalents, bonds, preferred stocks, and common stocks. The investment target ranges and actual allocation of pension plan assets by major category as of December 31, 2019 and 2018 were as follows: December 31, Target 2019 2018 Asset Category Cash and cash equivalents 0 - 20% 19 % 3 % Total fixed income funds 25 - 50% 30 28 Total mutual funds and equities 35 - 70% 51 69 Total 100 % 100 % In accordance with the fair value disclosure requirements of ASC 820, “Fair Value Measurements and Disclosures,” the following assets were measured at fair value on a recurring basis as of December 31, 2019 and 2018. Additional information regarding ASC 820 and the fair value hierarchy can be found in Note 18. December 31, 2019 2018 Asset Category Cash and cash equivalents $ 817 $ 355 Fixed income funds Corporate bonds 1,336 3,521 Total fixed income funds 1,336 3,521 Equity funds and equities Mutual funds 694 1,881 Exchange-traded funds 1,513 6,711 Total mutual funds and equities 2,207 8,592 Total $ 4,360 $ 12,468 Cash equivalents: The Company uses quoted market prices to determine the fair value of these investments in interest-bearing cash accounts and they are classified as Level 1 of the fair value hierarchy. The carrying amounts approximate fair value because of the short maturity of the instruments. Fixed income funds: Investments within the fixed income funds category consist of fixed income corporate debt. The Company uses quoted market prices to determine the fair values of these fixed income funds. These instruments consist of exchange-traded government and corporate bonds and are classified as Level 1 of the fair value hierarchy. Equity funds and equities: The valuation of investments in registered investment companies is based on the underlying investments in securities. Securities traded on security exchanges are valued at the latest quoted sales price. Securities traded in the over-the-counter market and listed securities for which no sale was reported on that date are valued at the average of the last reported bid and ask quotations. These investments are classified as Level 1 of the fair value hierarchy. The Company currently anticipates contributions of $660 to its United States defined benefit plan in 2020. The following benefit payments are expected to be paid during the years indicated: Year Ending December 31, 2020 $ 429 2021 453 2022 457 2023 481 2024 477 Years 2025-2029 2,276 United Kingdom Defined Benefit Plan The Company’s U.K. defined benefit plan (“Portec Rail Plan”) covers certain current employees, former employees, and retirees. The plan has been frozen to new entrants since April 1, 1997 and also covers the former employees of a merged plan after January 2002. Benefits under the plan were based on years of service and eligible compensation during defined periods of service. Our funding policy for the plan is to make minimum annual contributions required by applicable regulations. The funded status of the United Kingdom defined benefit plan as of December 31, 2019 and 2018 was as follows: December 31, 2019 2018 Changes in benefit obligation: Benefit obligation at beginning of year $ 7,750 $ 8,335 Interest cost 221 194 Actuarial loss (gain) 1,142 (201) Benefits paid (326) (292) Foreign currency exchange rate changes 314 (475) Benefit obligation at end of year $ 9,101 $ 7,750 Change to plan assets: Fair value of assets at beginning of year $ 6,347 $ 6,904 Actual gain (loss) on plan assets 697 (144) Employer contribution 314 271 Benefits paid (326) (292) Foreign currency exchange rate changes 258 (392) Fair value of assets at end of year 7,290 6,347 Funded status at end of year $ (1,811) $ (1,403) Amounts recognized in the consolidated balance sheet consist of: Other long-term liabilities $ (1,811) $ (1,403) Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 1,641 $ 1,116 Prior service cost 172 208 $ 1,813 $ 1,324 Net periodic pension costs for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Components of net periodic benefit cost: Interest cost $ 221 $ 194 Expected return on plan assets (252) (260) Amortization of prior service cost 25 42 Recognized net actuarial loss 263 208 Net periodic pension cost $ 257 $ 184 The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 2.0 % 2.8 % Expected rate of return on plan assets 3.3 % 3.8 % Amounts applicable to the Company’s pension plans with accumulated benefit obligations in excess of plan assets were as follows as of December 31, 2019 and 2018: December 31, 2019 2018 Projected benefit obligation $ 9,101 $ 7,750 Accumulated benefit obligation 9,101 7,750 Fair value of plan assets 7,290 6,347 The Company has estimated the long-term rate of return on plan assets based primarily on historical returns on plan assets, adjusted for changes in target portfolio allocations, and recent changes in long-term interest rates based on publicly available information. Plan assets are invested by the trustees in accordance with a written statement of investment principles. This statement permits investment in equities, corporate bonds, United Kingdom government securities, commercial property, and cash, based on certain target allocation percentages. Asset allocation is primarily based on a strategy to provide steady growth without undue fluctuations. The target asset allocation percentages for 2019 were as follows: Portec Rail Plan Equity securities Up to 100% Commercial property Not to exceed 50% U.K. Government securities Not to exceed 50% Cash Up to 100% Plan assets held within the United Kingdom defined benefit plan consist of cash and equity securities that have been classified as Level 1 of the fair value hierarchy. All other plan assets have been classified as Level 2 of the fair value hierarchy. The plan assets by category for the years ended December 31, 2019 and 2018 were as follows: December 31, 2019 2018 Asset Category Cash and cash equivalents $ 516 $ 685 Equity securities 2,090 2,001 Bonds 3,735 2,866 Other 949 795 Total $ 7,290 $ 6,347 United Kingdom regulations require trustees to adopt a prudent approach to funding required contributions to defined benefit pension plans. The Company anticipates making contributions of $318 to the United Kingdom defined benefit plan during 2020. The following estimated future benefits payments are expected to be paid under the United Kingdom defined benefit plan: Year Ending December 31, 2020 $ 280 2021 299 2022 312 2023 370 2024 396 Years 2025-2029 1,744 Other Post-Retirement Benefit Plan The Company’s operation near Montreal, Quebec, Canada, maintains a post-retirement benefit plan, which provides retiree life insurance, health care benefits, and, for a closed group of employees, dental care. Retiring employees with a minimum of 10 years of service are eligible for the plan benefits. The plan is not funded. Cost of benefits earned by employees is charged to expense as services are rendered. The expense related to this plan was not material for 2019 or 2018. The accrued benefit obligation was $840 and $724 as of December 31, 2019 and 2018, respectively. This obligation is recognized within “Other long-term liabilities” on the Consolidated Balance Sheets. During 2018, the plan recognized a curtailment gain of $113. Benefit payments anticipated for 2020 are not material. The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 3.1 % 3.8 % Weighted average health care trend rate 4.9 % 4.9 % The weighted average health care rate is assumed to trend downward to an ultimate rate of 4.0% in 2040. Defined Contribution Plans The Company sponsors six defined contribution plans for hourly and salaried employees across our domestic and international facilities. The following table summarizes the expense associated with the contributions made to these plans. Year Ended December 31, 2019 2018 United States $ 2,323 $ 2,762 Canada 144 193 United Kingdom 442 451 $ 2,909 $ 3,406

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company determines the fair value of assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. The fair values are based on assumptions that market participants would use when pricing an asset or liability, including assumptions about risk and the risks inherent in valuation techniques and the inputs to valuations. The fair value hierarchy is based on whether the inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s own assumptions of what market participants would use. The fair value hierarchy includes three levels of inputs that may be used to measure fair value as described below. Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. The classification of a financial asset or liability within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The Company has an established process for determining fair value for its financial assets and liabilities, principally cash and cash equivalents and interest rate swaps. Fair value is based on quoted market prices, where available. If quoted market prices are not available, fair value is based on assumptions that use as inputs market-based parameters. The following section describes the valuation methodologies used by the Company to measure different financial instruments at fair value, including an indication of the level in the fair value hierarchy in which each instrument is generally classified. Where appropriate, the description includes details of the key inputs to the valuations and any significant assumptions. Cash equivalents. Included within “Cash and cash equivalents” are investments in non-domestic term deposits. The carrying amounts approximate fair value because of the short maturity of the instruments. LIBOR-Based interest rate swaps . To reduce the impact of interest rate changes on outstanding variable-rate debt, the Company entered into forward starting LIBOR-based interest rate swaps with notional values totaling $50,000. The swaps became effective in February 2017 at which point they effectively converted a portion of the debt from variable to fixed-rate borrowings during the term of the swap contract. The fair value of the interest rate swaps is based on market-observable forward interest rates and represents the estimated amount that the Company would pay to terminate the agreements. As such, the swap agreements have been classified as Level 2 within the fair value hierarchy. When the interest rate swap fair market value is in an asset position, they are recorded in “Other current assets” and when in a liability position, they are recorded in “Other accrued liabilities” within our Consolidated Balance Sheets. The following assets and liabilities of the Company were measured at fair value on a recurring basis subject to the disclosure requirements of ASC 820, “Fair Value Measurement,” as of December 31, 2019 and 2018: Fair Value Measurements as of December 31, 2019 Fair Value Measurements as of December 31, 2018 December 31, 2019 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2018 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Term deposits $ 17 $ 17 $ — $ — $ 16 $ 16 $ — $ — Interest rate swaps — — — — 675 — 675 — Total assets $ 17 $ 17 $ — $ — $ 691 $ 16 $ 675 $ — Interest rate swaps $ 480 $ — $ 480 $ — $ — $ — $ — $ — Total liabilities $ 480 $ — $ 480 $ — $ — $ — $ — $ — The interest rate swaps are accounted for as cash flow hedges and the objective of the hedges is to offset the expected interest variability on payments associated with the interest rate on our domestic debt. Therefore, the gains and losses related to the interest rate swaps are reclassified from “Accumulated other comprehensive loss” and included in “Interest expense - net” in our Consolidated Statements of Operations. For the year ended December 31, 2019 and 2018, interest income from interest rate swaps was $114 and $34, respectively. The gross carrying value of the Company’s revolving credit facility approximates fair value for the periods presented. Additional information regarding the revolving credit facility can be found in Note 10. Information regarding the fair value disclosures associated with the assets of the Company’s defined benefit plans can be found in Note 16.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities The Company is subject to product warranty claims that arise in the ordinary course of its business. For certain manufactured products, the Company maintains a product warranty accrual that is adjusted on a monthly basis as a percentage of cost of sales. This product warranty accrual is periodically adjusted based on the identification or resolution of known individual product warranty claims. The following table sets forth the Company’s product warranty accrual: Warranty Liability Balance as of December 31, 2018 $ 2,057 Additions to warranty liability 767 Warranty liability utilized (1,602) Balance as of December 31, 2019 $ 1,222 During the year ended December 31, 2018, the Company incurred a charge of $611 within "Cost of goods sold" in our Rail Products and Services segment related to a commercial decision to support a customer concern related to a previous project. On March 13, 2019, the Company and its subsidiary, CXT Incorporated entered into a Settlement Agreement (the “Settlement Agreement”) with Union Pacific Railroad (“UPRR”) to resolve the pending litigation in the matter of Union Pacific Railroad Company v. L.B. Foster Company and CXT Incorporated , Case No. CI 15-564, in the District Court for Douglas County, Nebraska. Under the Settlement Agreement, the Company and CXT will pay UPRR the aggregate amount of $50,000 without pre-judgment interest, beginning with a $2,000 immediate payment, and with the remaining $48,000 paid in installments over a six-year period commencing on March 13, 2019 through December 2024 pursuant to a Promissory Note. Additionally, commencing in January 2019 and through December 2024, UPRR has agreed to purchase from the Company and its subsidiaries and affiliates, a cumulative total amount of $48,000 of products and services, targeting $8,000 of annual purchases per year beginning with 2019 per letters of intent under the Settlement Agreement. The Settlement Agreement also includes a mutual release of all claims and liability regarding or relating to all CXT pre-stressed concrete railroad ties with no admission of liability and dismissal of the litigation with prejudice. The expected payments under the UPRR settlement agreement for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, 2020 $ 8,000 2021 8,000 2022 8,000 2023 8,000 2024 8,000 Total $ 40,000 The Company reclassified $6,600 of the previously accrued warranty reserve related to the UPRR matter into its aggregate accrued settlement liability of $50,000 as of December 31, 2018. Therefore the Company recognized $43,400 in expense for the year ended December 31, 2018 for the remaining amount per the Settlement Agreement, which was recorded in “Concrete Tie Settlement expense” within our Consolidated Statements of Operations. As of December 31, 2019 and 2018, $8,000 and $10,000 was recorded within “Current portion of accrued settlement,” respectively, and $32,000 and $40,000 was recorded within “Long-term portion of accrued settlement,” respectively, within our Consolidated Balance Sheets. Other Legal Matters The Company is also subject to other legal proceedings and claims that arise in the ordinary course of its business. Legal actions are subject to inherent uncertainties, and future events could change management’s assessment of the probability or estimated amount of potential losses from pending or threatened legal actions. Based on available information, it is the opinion of management that the ultimate resolution of pending or threatened legal actions, both individually and in the aggregate, will not result in losses having a material adverse effect on the Company’s financial position or liquidity as of December 31, 2019. If management believes that, based on available information, it is at least reasonably possible that a material loss (or additional material loss in excess of any accrual) will be incurred in connection with any legal actions, the Company discloses an estimate of the possible loss or range of loss, either individually or in the aggregate, as appropriate, if such an estimate can be made, or discloses that an estimate cannot be made. Based on the Company’s assessment as of December 31, 2019, no such disclosures were considered necessary. Environmental Matters The Company is subject to national, state, foreign, provincial, and/or local laws and regulations relating to the protection of the environment. The Company’s efforts to comply with environmental regulations may have an adverse effect on its future earnings. On June 5, 2017, a General Notice Letter was received from the United States Environmental Protection Agency (“EPA”) indicating that the Company may be a potentially responsible party (“PRP”) regarding the Portland Harbor Superfund Site cleanup along with numerous other companies. More than 140 other companies received such a notice. The Company and a predecessor owned and operated a facility near the harbor site for a period prior to 1982. The net present value and undiscounted costs of the selected remedy throughout the harbor site are estimated by the EPA to be approximately $1.1 billion and $1.7 billion, respectively, and the remedial work is expected to take as long as 13 years to complete. The Company is reviewing the basis for its identification by the EPA and the nature of the historic operations of a Company predecessor near the site. Additionally, the Company executed a PRP agreement which provides for a private allocation process among almost 100 PRPs in a working group whose work is ongoing. We cannot predict the ultimate impact of these proceedings because of the large number of PRPs involved throughout the harbor site, the degree of contamination of various wastes, varying environmental impacts throughout the harbor site, the scarcity of data related to the facility once operated by the Company and a predecessor, and the speculative nature of the remediation costs. Based upon information currently available, management does not believe that the Company’s alleged PRP status regarding the Portland Harbor Superfund Site or other compliance with the present environmental protection laws will have a material adverse effect on the financial condition, results of operations, cash flows, competitive position, or capital expenditures of the Company. The following table sets forth the Company’s undiscounted environmental obligation: Environmental Liability Balance as of December 31, 2018 $ 6,128 Additions to environmental obligations 54 Environmental obligations utilized (114) Balance as of December 31, 2019 $ 6,068

Other Expense (Income)

Other Expense (Income)	12 Months Ended
	Dec. 31, 2019
Other Income and Expenses [Abstract]
Other Expense (Income)	Other Expense (Income) The following table summarizes the Company’s other expense (income) for the years ended December 31, 2019 and 2018. 2019 2018 Loss on U.S. pension settlement (a) $ 2,210 $ — Loss on Construction Segment relocation and closure activities (b) 1,768 — Loss on Tubular and Energy Segment closure activities (c) 1,716 — Loss on Tubular and Energy Segment asset sale (d) — 269 Loss on Tubular and Energy Segment fixed asset sales or disposals (e) — 786 Gain on prior Rail Segment warranty claim (f) — (525) Foreign currency losses (gains) 202 (483) Other (1,404) (508) Other expense (income) - net $ 4,492 $ (461) a. In the fourth quarter of 2019, the Company recorded an expense of $2,210 resulting from settlements within our U.S. defined benefit pension plan. b. During the fourth quarter of 2019, the Company announced and commenced the relocation and closure of the Spokane, WA concrete products facility and the subsequent relocation to Boise, ID, which was completed during the first quarter of 2020. This activity resulted in expense of $1,768 within the Construction Products segment. c. In 2019, three sites within the Tubular and Energy Services segment ceased operations or were held for sale, resulting in closure costs of $1,716. d. On June 19, 2018, the Company sold 54.5 acres of land in Willis, TX for $2,047, resulting in a pretax loss of $269 within our Tubular and Energy Services segment. e. During 2018, the Tubular and Energy Services segment sold or disposed of certain non-core assets, which resulted in a loss of $786. f. In 2018, the Rail Products and Services segment received a reimbursement of $525 for a 2016 warranty claim on a transit project.

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Unaudited)	Quarterly Financial Information (Unaudited) Quarterly financial information for the years ended December 31, 2019 and 2018 is presented below: Three Months Ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 Net sales $ 150,469 $ 200,933 $ 154,276 $ 149,379 Gross profit $ 29,162 $ 37,128 $ 27,692 $ 27,390 Net income $ 3,690 $ 9,564 $ 3,064 $ 26,250 Basic earnings per common share $ 0.36 $ 0.92 $ 0.29 $ 2.52 Diluted earnings per common share $ 0.35 $ 0.90 $ 0.29 $ 2.46 Three Months Ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 Net sales $ 122,454 $ 172,890 $ 167,094 $ 164,531 Gross profit $ 22,192 $ 33,063 $ 31,303 $ 30,601 Net (loss) income $ (1,858) $ 5,434 $ 6,408 $ (41,152) Basic (loss) earnings per common share $ (0.18) $ 0.52 $ 0.62 $ (3.97) Diluted (loss) earnings per common share $ (0.18) $ 0.52 $ 0.61 $ (3.97)

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Organization, operations, and basis of consolidations	Organization, operations, and basis of consolidation The consolidated financial statements include the accounts of L.B. Foster Company and its wholly-owned subsidiaries, joint ventures, and partnerships in which a controlling interest is held. Inter-company transactions and accounts have been eliminated. The Company utilizes the equity method of accounting for companies where its ownership is less than or equal to 50% and significant influence exists. L.B. Foster Company (“Company”) is a leading manufacturer and distributor of products and service provider for transportation and energy infrastructure with locations in North America and Europe. The Company is organized and operates in three business segments: Rail Products and Services (“Rail”), Construction Products (“Construction”), and Tubular and Energy Services (“Tubular and Energy”). The Rail segment is comprised of several manufacturing and distribution businesses that provide a variety of products and services for freight and passenger railroads and industrial companies throughout the world. The Construction segment is composed of piling, fabricated bridge, and precast concrete product offerings across North America. The Tubular and Energy segment provides products and services predominantly to the U.S. mid and upstream oil and gas markets.
Cash and cash equivalents	Cash and cash equivalents The Company considers cash and other instruments with maturities of three months or less when purchased to be cash and cash equivalents. The Company invests available funds in a manner to maximize returns, preserve investment principal, and maintain liquidity, while seeking the highest yield available. Cash and cash equivalents held in non-domestic accounts were $13,660 and $8,058 as of December 31, 2019 and 2018, respectively. Included in non-domestic cash equivalents are investments in bank term deposits of approximately $17 and $16 as of December 31, 2019 and 2018, respectively. The carrying amounts approximated fair value due to the short maturity of the instruments.
Inventory	Inventory Inventory is valued at the lower of average cost or net realizable value. Slow-moving inventory is reviewed and adjusted regularly, based upon product knowledge, physical inventory observation, inventory turnover, and the age of the inventory. Inventory contains product costs, including inbound freight, direct labor, overhead costs relating to the manufacturing and distribution of products, and absorption costs representing the excess manufacturing or production costs over the amounts charged to the cost of sales or services.
Property, plant and equipment	Property, plant, and equipment Depreciation and amortization are provided on a straight-line basis over the estimated useful lives of 7 to 40 years for buildings and 2 to 13 years for machinery and equipment. Leasehold improvements are amortized over 6 to 10 years, which represent the lives of the respective leases or the lives of the improvements, whichever is shorter. Depreciation expense is recorded within “Cost of goods sold,” “Cost of services sold,” and “Selling and administrative expenses” on the Consolidated Statements of Operations based upon the particular asset’s use. The Company reviews a long-lived asset for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The Company recognizes an impairment loss if the carrying amount of a long-lived asset is not recoverable and exceeds its fair value. There were no property, plant, and equipment impairments recorded for the years ended December 31, 2019 and 2018. Maintenance, repairs, and minor renewals are charged to operations as incurred. Major renewals and betterments that substantially extend the useful life of the property are capitalized at cost. Upon sale or other disposition of assets, the costs and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss, if any, is reflected in “Other income or expense.”
Allowance for doubtful accounts	Allowance for doubtful accounts The allowance for doubtful accounts is recorded to reflect the estimated realization of the Company’s accounts receivable and includes assessments of the probability of collection and the credit-worthiness of certain customers. Reserves for uncollectible accounts are recorded as part of “Selling and administrative expenses” on the Consolidated Statements of Operations. The Company reviews its accounts receivable aging and calculates an allowance through application of historic reserve factors to overdue receivables. This calculation is supplemented by specific account reviews performed by the Company’s credit department. As
Goodwill and other intangible assets	Goodwill and other intangible assets Goodwill is the cost of an acquisition less the fair value of the identifiable net assets of the acquired business. Goodwill is tested annually for impairment or more often if there are indicators of impairment within a reporting unit. A reporting unit is an operating segment or a component of an operating segment for which discrete financial information is available and reviewed by management on a regular basis. The goodwill impairment test involves comparing the fair value of a reporting unit to its carrying value, including goodwill. If the carrying amount of the reporting unit exceeds its fair value, an impairment loss equal to the excess amount up to the goodwill balance is recorded as a component of operations. The Company performs its annual impairment tests in the fourth quarter. The Company’s fourth quarter 2019 annual test included the assessment of qualitative factors to determine whether it was more likely than not that the fair value of each reporting unit is less than its carrying value. The qualitative assessment encompassed a review of events and circumstances specific to each reporting unit with goodwill, as well as specific to the entity as a whole. The Company’s qualitative assessment considered, among other things, factors such as macroeconomic conditions, industry and market considerations, including changes in the Company’s stock price and market multiples, projected financial performance, cost factors, changes in carrying values, and other relevant factors. Considering the totality of the qualitative factors assessed, based on the weight of evidence, no circumstances existed that would indicate it was more likely than not that goodwill was impaired. There was no goodwill impairment recognized during 2019 or 2018. The Company continues to monitor the recoverability of the long-lived assets associated with certain reporting units of the Company and the long-term financial projections of the businesses. Sustained declines in the markets we serve may result in future long-lived asset impairment.
Environmental and remediation and compliance	Environmental remediation and compliance Environmental remediation costs are accrued when the liability is probable and costs are estimable. Environmental compliance costs, which principally include the disposal of waste generated by routine operations, are expensed as incurred. Capitalized environmental costs, when appropriate, are depreciated over their useful life. Reserves are not reduced by potential claims for recovery and are not discounted. Claims for recovery are recognized as agreements are reached with third parties or as amounts are received. Reserves are periodically reviewed throughout the year and adjusted to reflect current remediation progress, prospective estimates of required activity, and other factors that may be relevant, including changes in technology or regulations. See Note 18 for additional information regarding the Company’s outstanding environmental and litigation reserves.
Revenue recognition	Revenue recognition The Company’s revenues are comprised of product and service sales, including products and services provided under long-term agreements with its customers. All revenue is recognized when the Company satisfies its performance obligations under the contract, either implicit or explicit, by transferring the promised product or rendering a service to its customer either when or as its customer obtains control of the product or the service is rendered. Deferred revenue consists of customer billings or payments received for which the revenue recognition criteria have not yet been met as well as contract liabilities (billings in excess of costs) on over time contracts. Advance payments from customers typically relate to contracts for which the Company has significantly fulfilled its obligations, but due to the Company’s continuing involvement with the project, revenue is precluded from being recognized until the performance obligation is met for the customer. See Note 3 for additional information.
Product warranty	Product warrantyThe Company maintains a current warranty liability for the repair or replacement of defective products. For certain manufactured products, an accrual is made on a monthly basis as a percentage of cost of sales based upon historical experience. For long-lived construction products, a warranty is established when the claim is known and quantifiable. The product warranty accrual is periodically adjusted based on the identification or resolution of known individual product warranty claims or due to changes in the Company’s historical warranty experience.
Income taxes	Income taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases. Deferred taxes are measured using enacted tax laws and rates expected to be in effect when such differences are recovered or settled. The effect of a change in tax rates on deferred taxes is recognized in income in the period that includes the enactment date of the change. The Company has also elected to record global intangible low-taxed income (“GILTI”) as period costs if and when incurred. The Company makes judgments regarding the recognition of deferred tax assets and the future realization of these assets. As prescribed by the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Codification (“ASC”) 740, “Income Taxes” and applicable guidance, valuation allowances must be provided for those deferred tax assets for which it is more likely than not (a likelihood of more than 50%) that some portion or all of the deferred tax assets will not be realized. The guidance requires the Company to evaluate positive and negative evidence regarding the recoverability of deferred tax assets. The determination of whether the positive evidence outweighs the negative evidence and quantification of the valuation allowance requires the Company to make estimates and judgments of future financial results. The Company has concluded that for purposes of quantifying valuation allowances, it would be appropriate to consider the reversal of taxable temporary differences related to indefinite-lived intangible assets when assessing the realizability of deferred tax assets that upon reversal, would give rise to operating losses that do not expire. The Company evaluates all tax positions taken on its federal, state, and foreign tax filings to determine if the position is more likely than not to be sustained upon examination. For positions that meet the more likely than not to be sustained criteria, the largest amount of benefit to be realized upon ultimate settlement is determined on a cumulative probability basis. A previously recognized tax position is derecognized when it is subsequently determined that a tax position no longer meets the more likely than not threshold to be sustained. The evaluation of the sustainability of a tax position and the expected tax benefit is based on judgment, historical experience, and various other assumptions. Actual results could differ from those estimates upon subsequent resolution of identified matters. The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes.
Foreign currency translation	Foreign currency translationThe assets and liabilities of our foreign subsidiaries are measured using the local currency as the functional currency and are translated into U.S. dollars at exchange rates as of the balance sheet date. Income statement amounts are translated at the weighted-average rates of exchange during the year. The translation adjustment is accumulated as a separate component of “Accumulated other comprehensive loss” within our Consolidated Balance Sheets.
Research and development	Research and developmentThe Company expenses research and development costs as costs are incurred.
Reclassifications	Reclassifications Certain accounts in the prior year consolidated financial statements have been reclassified for comparative purposes principally to conform to the presentation in the current year period.
Recently issued accounting standards	Recently issued accounting guidance In August 2018, the FASB issued Accounting Standards Update (“ASU”) 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software” (“ASU 2018-15”). ASU 2018-15 requires capitalization of certain implementation costs incurred in a cloud computing arrangement that is a service contract. The amendments in ASU 20118-15 are effective for fiscal years beginning after December 15, 2019 and for interim periods therein with early adoption permitted. The Company evaluated the potential impact of ASU 2018-15 on its consolidated financial position, results of operations, and cash flows and anticipates the adoption will have an immaterial effect on the Company’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326) Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 added a new impairment model (known as the current expected credit loss (“CECL”) model) that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The CECL model applies to trade receivables, other receivables, and most debt instruments. The CECL model does not have a minimum threshold for recognition of impairment losses, and entities will need to measure expected credit losses on assets that have a low risk of loss. The new standard will become effective for the Company January 1, 2020 and will be applied using the modified retrospective basis. The Company anticipates the adoption of this standard will not have a material impact on the Company’s Consolidated Financial Statements. Recently adopted accounting guidance In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). The new accounting requirements include the accounting for, presentation of, and classification of leases. The guidance resulted in most leases being capitalized as a right-of-use asset with a related balance sheet liability. The requirements of the new standard are effective for annual reporting periods beginning after December 15, 2018, and interim periods within those annual periods. The Company adopted the provisions of ASU 2016-02 on January 1, 2019, using the modified retrospective approach as of the beginning of the period of adoption. Additionally, the Company has elected to apply the practical expedients for leases that commenced prior to the effective date, not to apply the recognition requirements in the standard to short-term leases, and not to separate non-lease components from lease components. The Company has presented the disclosures required by ASU 2016-02 in Note 8.

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The operating results and assets of the Company’s operating segments were as follows as of and for the year ended December 31, 2019: Net Sales Segment Profit Segment Assets Depreciation/Amortization Expenditures for Long-Lived Assets Rail Products and Services $ 321,808 $ 19,641 $ 186,323 $ 6,469 $ 2,293 Construction Products 182,486 5,726 83,049 1,660 1,266 Tubular and Energy Services 150,763 11,147 77,320 8,174 4,920 Total $ 655,057 $ 36,514 $ 346,692 $ 16,303 $ 8,479 The operating results and assets of the Company’s operating segments were as follows as of and for the year ended December 31, 2018: Net Sales Segment Profit Segment Assets Depreciation/Amortization Expenditures for Long-Lived Assets Rail Products and Services $ 319,524 $ 19,468 $ 175,704 $ 6,810 $ 941 Construction Products 158,653 6,798 97,133 1,728 796 Tubular and Energy Services 148,792 12,647 90,402 8,790 3,212 Total $ 626,969 $ 38,913 $ 363,239 $ 17,328 $ 4,949
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	Reconciliations of reportable segment net sales, profits, assets, depreciation/amortization, and expenditures for long-lived assets to the Company’s consolidated totals are as follows as of and for the years ended December 31: 2019 2018 Income from Operations: Total segment profit $ 36,514 $ 38,913 Interest expense - net (4,920) (6,154) Other (expense) income (4,492) 461 Concrete Tie Settlement expense (Note 18) — (43,400) Corporate expense and other unallocated charges (9,705) (16,531) Income (loss) before income taxes $ 17,397 $ (26,711) Assets: Total segment assets $ 346,692 $ 363,239 Unallocated corporate assets 58,479 20,010 Assets $ 405,171 $ 383,249 Depreciation/Amortization: Total segment depreciation/amortization $ 16,303 $ 17,328 Other 1,328 1,265 Depreciation/amortization $ 17,631 $ 18,593 Expenditures for Long-Lived Assets: Total segment expenditures for long-lived assets $ 8,479 $ 4,949 Other expenditures for long-lived assets 352 302 Expenditures for long-lived assets $ 8,831 $ 5,251
Revenue from Customer by Major Geographical Region	The following table summarizes the Company’s sales by major geographic region in which the Company had operations for the years ended December 31: 2019 2018 United States $ 529,363 $ 484,907 United Kingdom 41,879 66,451 Canada 57,574 42,810 Other 26,241 32,801 Total net sales $ 655,057 $ 626,969
Reconciliation of Assets from Segment to Consolidated	The following table summarizes the Company’s long-lived assets by geographic region as of December 31: 2019 2018 United States $ 77,101 $ 81,135 Canada 3,590 4,036 United Kingdom 1,610 1,671 Other 13 15 Total property, plant, and equipment - net $ 82,314 $ 86,857
Schedule of Revenues by Major Product Line	The following table summarizes the Company’s sales by major product line for the years ended December 31: 2019 2018 Rail Products $ 194,464 $ 188,590 Rail Technologies 127,344 130,934 Piling and Fabricated Bridge Products 114,076 102,246 Protective Coatings and Measurement Systems 99,760 89,026 Precast Concrete Products 68,410 56,407 Test, Inspection, and Threading Services 51,003 59,766 Total net sales $ 655,057 $ 626,969

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table summarizes the Company’s net sales by major product and service category: December 31, 2019 2018 Rail Products $ 194,464 $ 188,590 Rail Technologies 127,344 130,934 Rail Products and Services 321,808 319,524 Piling and Fabricated Bridge Products 114,076 102,246 Precast Concrete Products 68,410 56,407 Construction Products 182,486 158,653 Test, Inspection, and Threading Services 51,003 59,766 Protective Coatings and Measurement Systems 99,760 89,026 Tubular and Energy Services 150,763 148,792 Total net sales $ 655,057 $ 626,969 For the years ended December 31, 2019 and 2018, net sales by the timing of the transfer of goods and services are as follows: Year ended December 31, 2019 Rail Products Construction Tubular and Total Point in time $ 240,047 $ 115,590 $ 112,645 $ 468,282 Over time 81,761 66,896 38,118 186,775 Total net sales $ 321,808 $ 182,486 $ 150,763 $ 655,057 Year ended December 31, 2018 Rail Products Construction Tubular and Total Point in time $ 232,814 $ 106,168 $ 124,734 $ 463,716 Over time 86,710 52,485 24,058 163,253 Total net sales $ 319,524 $ 158,653 $ 148,792 $ 626,969

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	As of December 31, 2019 and 2018, the following table represents the goodwill balance by reportable segment: Rail Products Construction Tubular and Total Balance as of December 31, 2018: $ 14,111 $ 5,147 $ — $ 19,258 Foreign currency translation impact 307 — — 307 Balance as of December 31, 2019: $ 14,418 $ 5,147 $ — $ 19,565
Schedule of Intangible Assets	As of December 31, 2019 and 2018, the components of the Company’s intangible assets were as follows: December 31, 2019 Weighted Average Gross Accumulated Net Non-compete agreements 4 $ 1,272 $ (1,259) $ 13 Patents 10 377 (188) 189 Customer relationships 18 37,498 (13,945) 23,553 Trademarks and trade names 16 7,787 (3,551) 4,236 Technology 13 35,728 (20,205) 15,523 $ 82,662 $ (39,148) $ 43,514 December 31, 2018 Weighted Average Gross Accumulated Net Non-compete agreements 4 $ 1,372 $ (1,046) $ 326 Patents 10 358 (165) 193 Customer relationships 18 37,129 (11,388) 25,741 Trademarks and trade names 15 8,481 (3,416) 5,065 Technology 14 35,640 (17,129) 18,511 $ 82,980 $ (33,144) $ 49,836
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Estimated annual amortization expense for the years ending December 31, 2020 and thereafter is as follows: Year Ending December 31, 2020 $ 5,910 2021 5,875 2022 5,791 2023 5,314 2024 4,288 2025 and thereafter 16,336 $ 43,514

Accounts Receivable (Tables)

Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Accounts Receivable Detail	Accounts receivable as of December 31, 2019 and 2018 are summarized as follows: December 31, 2019 2018 Accounts receivable $ 79,675 $ 87,055 Allowance for doubtful accounts (1,100) (932) Accounts receivable - net $ 78,575 $ 86,123 The Company’s customers are principally in the transportation and energy infrastructure sectors. As of December 31, 2019 and 2018, trade receivables, net of allowance for doubtful accounts, from customers were as follows: December 31, 2019 2018 Rail Products and Services $ 44,941 $ 43,180 Construction Products 19,301 19,998 Tubular and Energy Services 14,205 19,121 Trade accounts receivable - net $ 78,447 $ 82,299

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Schedule of Inventory	The Company’s components of inventory as of December 31, 2019 and 2018 are summarized in the following table: December 31, 2019 2018 Finished goods $ 59,864 $ 69,041 Contract assets 37,032 26,692 Work-in-process 3,728 6,940 Raw materials 18,677 21,831 Inventories - net $ 119,301 $ 124,504

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant, and equipment as of December 31, 2019 and 2018 consisted of the following: December 31, 2019 2018 Land $ 11,076 $ 12,440 Improvements to land and leaseholds 17,172 17,610 Buildings 35,241 34,608 Machinery and equipment, including equipment under finance leases 122,599 120,914 Construction in progress 5,234 3,083 Gross property, plant, and equipment 191,322 188,655 Less: accumulated depreciation and amortization, including accumulated amortization of finance leases (109,008) (101,798) Property, plant, and equipment - net $ 82,314 $ 86,857

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Balance Sheet Location	The balance sheet components of the Company’s leases were as follows as of December 31, 2019: December 31, 2019 Operating leases Operating lease right-of-use assets $ 13,274 Other current liabilities $ 3,006 Long-term operating lease liabilities 10,268 Total operating lease liabilities $ 13,274 Finance leases Property, plant, and equipment $ 3,518 Accumulated amortization (2,943) Property, plant, and equipment - net $ 575 Current maturities of long-term debt $ 405 Long-term debt 170 Total finance lease liabilities $ 575
Components of Lease Cost	The components of lease expense within the Company’s Consolidated Statements of Operations were as follows for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Finance lease cost: Amortization of finance leases $ 722 $ 731 Interest on lease liabilities 57 50 Operating lease cost 3,930 4,825 Sublease income (18) (37) Total lease cost $ 4,691 $ 5,569 The cash flow components of the Company’s leases were as follows for the year ended December 31, 2019: Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (4,676) Financing cash flows from finance leases (722) Right-of-use assets obtained in exchange for new lease liabilities: Operating leases $ 3,619
Lessee, Operating Lease, Liability, Maturity	As of December 31, 2019, estimated annual maturities of lease liabilities for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, Operating Leases Finance Leases 2020 $ 3,351 $ 450 2021 2,384 131 2022 1,852 47 2023 1,640 17 2024 1,540 11 2025 and there after 4,033 — 14,800 656 Interest (1,526) (81) Total $ 13,274 $ 575
Finance Lease, Liability, Maturity	As of December 31, 2019, estimated annual maturities of lease liabilities for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, Operating Leases Finance Leases 2020 $ 3,351 $ 450 2021 2,384 131 2022 1,852 47 2023 1,640 17 2024 1,540 11 2025 and there after 4,033 — 14,800 656 Interest (1,526) (81) Total $ 13,274 $ 575

Long-Term Debt and Related Ma_2

Long-Term Debt and Related Matters (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt as of December 31, 2019 and 2018 consisted of the following: December 31, 2019 2018 Revolving credit facility with an interest rate of 4.28% as of December 31, 2019 and 4.80% as of December 31, 2018 $ 33,868 $ 74,008 Term loan payable in quarterly installments through April 30, 2024 with an interest rate of 4.19% at December 31, 2019 23,750 — Lease obligations payable in installments through 2024 with a weighted average interest rate of 3.63% as of December 31, 2019 and 3.32% as of December 31, 2018 575 974 Total debt 58,193 74,982 Less: current maturities (2,905) (629) Long-term portion $ 55,288 $ 74,353
Schedule of Maturities of Long-term Debt	The expected maturities of long-term debt for December 31, 2020 and thereafter are as follows: Year Ending December 31, 2020 $ 2,905 2021 2,604 2022 2,545 2023 2,510 2024 47,629 2025 and thereafter — Total $ 58,193

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of Common Stock Outstanding Roll Forward	Common Stock Treasury Outstanding (Number of Shares) Balance at end of 2017 775,203 10,340,576 Issued for stock-based compensation plans (25,431) 25,431 Balance at end of 2018 749,772 10,366,007 Issued for stock-based compensation plans (56,084) 56,084 Balance at end of 2019 693,688 10,422,091

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss, net of tax, for the years ended December 31, 2019 and 2018, were as follows: December 31, 2019 2018 Pension and post-retirement benefit plan adjustments $ (2,959) $ (3,839) Unrealized (loss) gain on interest rate swap contracts (230) 675 Foreign currency translation adjustments (16,994) (19,027) Accumulated other comprehensive loss $ (20,183) $ (22,191)

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted earnings (loss) per common share for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Numerator for basic and diluted earnings (loss) per common share: Net income (loss) $ 42,568 $ (31,168) Denominator: Weighted average shares outstanding 10,410 10,362 Denominator for basic earnings per common share 10,410 10,362 Effect of dilutive securities: Stock compensation plans 234 — Dilutive potential common shares 234 — Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions 10,644 10,362 Basic earnings (loss) per common share $ 4.09 $ (3.01) Diluted earnings (loss) per common share $ 4.00 $ (3.01)

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Components of Income before Income Tax	Income (loss) before income taxes, as shown in the accompanying Consolidated Statements of Operations, includes the following components for the years ended December 31, 2019 and 2018: Year Ended December 31, 2019 2018 Domestic $ 12,230 $ (34,608) Foreign 5,167 7,897 Income (loss) from operations, before income taxes $ 17,397 $ (26,711)
Significant Components of Income Tax	Significant components of the provision for income taxes for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Current: Federal $ 1,909 $ 2,208 State 505 172 Foreign 1,925 3,675 Total current 4,339 6,055 Deferred: Federal (22,835) (55) State (6,173) (8) Foreign (502) (1,535) Total deferred (29,510) (1,598) Total income tax (benefit) expense $ (25,171) $ 4,457
Reconciliation of Statutory Income to Income Tax Expense	The reconciliation of income tax computed at statutory rates to income tax expense for the years ended December 31, 2019 and 2018 is as follows: Year Ended December 31, 2019 2018 Amount Percent Amount Percent Statutory rate $ 3,653 21.0 % $ (5,609) 21.0 % Foreign tax rate differential 129 0.7 156 (0.6) State income taxes, net of federal benefit (59) (0.3) (706) 2.6 Non-deductible expenses 345 2.0 261 (1.0) Global intangible low-taxed income, net of tax credits 145 0.8 171 (0.6) Income tax credits (126) (0.7) (633) 2.4 Nondeductible executive compensation 234 1.3 351 (1.3) Tax on unremitted foreign earnings 216 1.2 149 (0.6) Change in valuation allowance (29,635) (170.3) 10,226 (38.3) Other (73) (0.4) 91 (0.3) Total income tax (benefit) expense / Effective rate $ (25,171) (144.7) % $ 4,457 (16.7) %
Significant Components of Deferred Tax Asset and Liability	Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2019 and 2018 were as follows: December 31, 2019 2018 Deferred tax assets: Goodwill and other intangibles $ 17,028 33 $ 18,756 Accrued settlement 10,196 11,933 Deferred compensation 3,620 2,940 Contingent liabilities 1,816 1,663 Net operating loss / tax credit carryforwards 1,438 1,602 Pension and post-retirement liability 1,414 1,524 Warranty reserve 294 346 Accounts receivable 261 214 Other 725 644 Total deferred tax assets 36,792 39,622 Less: valuation allowance (1,072) (30,707) Net deferred tax assets 35,720 8,915 Deferred tax liabilities: Goodwill and other intangibles (4,454) (5,020) Depreciation (5,946) (6,625) Inventories (946) (2,125) Unremitted earnings of foreign subsidiaries (390) (160) Other (97) (272) Total deferred tax liabilities (11,833) (14,202) Net deferred tax assets (liabilities) $ 23,887 $ (5,287)
Reconciliation of Unrealized tax Benefits	The following table provides a reconciliation of unrecognized tax benefits as of December 31, 2019 and 2018: December 31, 2019 2018 Unrecognized tax benefits at beginning of period: $ 481 $ 599 Decreases based on tax positions for prior periods (67) (118) Balance at end of period $ 414 $ 481

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Compensation [Abstract]
Schedule of Nonvested Share Activity	The following table summarizes the restricted stock award, deferred stock units, and performance unit award activity for the years ended December 31, 2019 and 2018: Restricted Deferred Performance Weighted Average Outstanding as of January 1, 2018 186,806 26,860 181,341 $ 16.53 Granted 62,320 14,914 65,421 27.05 Vested (36,876) — — 28.07 Adjustment for incentive awards — — 65,491 26.93 Canceled and forfeited (20,425) — (11,880) 16.38 Outstanding as of December 31, 2018 191,825 41,774 300,373 $ 18.61 Granted 62,125 12,304 89,092 18.63 Vested (90,282) — — 19.61 Adjustment for incentive awards — — (52,180) 24.30 Canceled and forfeited (12,869) — (6,137) 20.79 Outstanding as of December 31, 2019 150,799 54,078 331,148 $ 18.50

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Defined Benefit Plan Disclosure
Schedule of Net Benefit Costs	Net periodic pension costs for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Components of net periodic benefit cost: Interest cost 648 622 Expected return on plan assets (719) (853) Recognized net actuarial loss 125 96 Net periodic pension cost (income) 54 (135) Settlement charge 2,210 — Total pension expense (income) $ 2,264 $ (135)
Schedule of Costs of Retirement Plans	The Company sponsors six defined contribution plans for hourly and salaried employees across our domestic and international facilities. The following table summarizes the expense associated with the contributions made to these plans. Year Ended December 31, 2019 2018 United States $ 2,323 $ 2,762 Canada 144 193 United Kingdom 442 451 $ 2,909 $ 3,406
Pension Plan | United States
Defined Benefit Plan Disclosure
Schedule of Changes in Accumulated Postemployment Benefit Obligations	The following tables present a reconciliation of the changes in the benefit obligation, the fair market value of the assets, and the funded status of the plan, as of December 31, 2019 and 2018: December 31, 2019 2018 Changes in benefit obligation: Benefit obligation at beginning of year $ 16,717 $ 18,783 Interest cost 648 622 Actuarial loss (gain) 400 (1,249) Benefits paid (840) (1,439) Settlements $ (9,116) $ — Benefit obligation at end of year $ 7,809 $ 16,717 Change to plan assets: Fair value of assets at beginning of year $ 12,468 $ 14,892 Actual gain (loss) on plan assets 1,298 (985) Employer contribution 550 — Benefits paid (840) (1,439) Settlements (9,116) — Fair value of assets at end of year 4,360 12,468 Funded status at end of year $ (3,449) $ (4,249) Amounts recognized in the consolidated balance sheet consist of: Other long-term liabilities $ (3,449) $ (4,249) Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 1,893 $ 4,406
Schedule of Changes in Fair Value of Plan Assets	The following tables present a reconciliation of the changes in the benefit obligation, the fair market value of the assets, and the funded status of the plan, as of December 31, 2019 and 2018: December 31, 2019 2018 Changes in benefit obligation: Benefit obligation at beginning of year $ 16,717 $ 18,783 Interest cost 648 622 Actuarial loss (gain) 400 (1,249) Benefits paid (840) (1,439) Settlements $ (9,116) $ — Benefit obligation at end of year $ 7,809 $ 16,717 Change to plan assets: Fair value of assets at beginning of year $ 12,468 $ 14,892 Actual gain (loss) on plan assets 1,298 (985) Employer contribution 550 — Benefits paid (840) (1,439) Settlements (9,116) — Fair value of assets at end of year 4,360 12,468 Funded status at end of year $ (3,449) $ (4,249) Amounts recognized in the consolidated balance sheet consist of: Other long-term liabilities $ (3,449) $ (4,249) Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 1,893 $ 4,406
Schedule of Weighted Average Assumptions Used	The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 4.0 % 3.4 % Expected rate of return on plan assets 5.9 % 5.9 %
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	Amounts applicable to the Company’s pension plan with accumulated benefit obligations in excess of plan assets were as follows as of December 31, 2019 and 2018: December 31, 2019 2018 Projected benefit obligation $ 7,809 $ 16,717 Accumulated benefit obligation 7,809 16,717 Fair value of plan assets 4,360 12,468
Schedule of Investment Allocation and Target Allocation	The investment target ranges and actual allocation of pension plan assets by major category as of December 31, 2019 and 2018 were as follows: December 31, Target 2019 2018 Asset Category Cash and cash equivalents 0 - 20% 19 % 3 % Total fixed income funds 25 - 50% 30 28 Total mutual funds and equities 35 - 70% 51 69 Total 100 % 100 % In accordance with the fair value disclosure requirements of ASC 820, “Fair Value Measurements and Disclosures,” the following assets were measured at fair value on a recurring basis as of December 31, 2019 and 2018. Additional information regarding ASC 820 and the fair value hierarchy can be found in Note 18. December 31, 2019 2018 Asset Category Cash and cash equivalents $ 817 $ 355 Fixed income funds Corporate bonds 1,336 3,521 Total fixed income funds 1,336 3,521 Equity funds and equities Mutual funds 694 1,881 Exchange-traded funds 1,513 6,711 Total mutual funds and equities 2,207 8,592 Total $ 4,360 $ 12,468
Schedule of Expected Benefit Payments	The following benefit payments are expected to be paid during the years indicated: Year Ending December 31, 2020 $ 429 2021 453 2022 457 2023 481 2024 477 Years 2025-2029 2,276
Pension Plan | United Kingdom
Defined Benefit Plan Disclosure
Schedule of Changes in Accumulated Postemployment Benefit Obligations	The funded status of the United Kingdom defined benefit plan as of December 31, 2019 and 2018 was as follows: December 31, 2019 2018 Changes in benefit obligation: Benefit obligation at beginning of year $ 7,750 $ 8,335 Interest cost 221 194 Actuarial loss (gain) 1,142 (201) Benefits paid (326) (292) Foreign currency exchange rate changes 314 (475) Benefit obligation at end of year $ 9,101 $ 7,750 Change to plan assets: Fair value of assets at beginning of year $ 6,347 $ 6,904 Actual gain (loss) on plan assets 697 (144) Employer contribution 314 271 Benefits paid (326) (292) Foreign currency exchange rate changes 258 (392) Fair value of assets at end of year 7,290 6,347 Funded status at end of year $ (1,811) $ (1,403) Amounts recognized in the consolidated balance sheet consist of: Other long-term liabilities $ (1,811) $ (1,403) Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 1,641 $ 1,116 Prior service cost 172 208 $ 1,813 $ 1,324
Schedule of Net Benefit Costs	Net periodic pension costs for the years ended December 31, 2019 and 2018 were as follows: Year Ended December 31, 2019 2018 Components of net periodic benefit cost: Interest cost $ 221 $ 194 Expected return on plan assets (252) (260) Amortization of prior service cost 25 42 Recognized net actuarial loss 263 208 Net periodic pension cost $ 257 $ 184
Schedule of Weighted Average Assumptions Used	The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 2.0 % 2.8 % Expected rate of return on plan assets 3.3 % 3.8 %
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	Amounts applicable to the Company’s pension plans with accumulated benefit obligations in excess of plan assets were as follows as of December 31, 2019 and 2018: December 31, 2019 2018 Projected benefit obligation $ 9,101 $ 7,750 Accumulated benefit obligation 9,101 7,750 Fair value of plan assets 7,290 6,347
Schedule of Investment Allocation and Target Allocation	The target asset allocation percentages for 2019 were as follows: Portec Rail Plan Equity securities Up to 100% Commercial property Not to exceed 50% U.K. Government securities Not to exceed 50% Cash Up to 100% Plan assets held within the United Kingdom defined benefit plan consist of cash and equity securities that have been classified as Level 1 of the fair value hierarchy. All other plan assets have been classified as Level 2 of the fair value hierarchy. The plan assets by category for the years ended December 31, 2019 and 2018 were as follows: December 31, 2019 2018 Asset Category Cash and cash equivalents $ 516 $ 685 Equity securities 2,090 2,001 Bonds 3,735 2,866 Other 949 795 Total $ 7,290 $ 6,347
Schedule of Expected Benefit Payments	The following estimated future benefits payments are expected to be paid under the United Kingdom defined benefit plan: Year Ending December 31, 2020 $ 280 2021 299 2022 312 2023 370 2024 396 Years 2025-2029 1,744
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure
Schedule of Weighted Average Assumptions Used	The weighted average assumptions in the following table represent the rates used to develop the actuarial present value of the projected benefit obligation for the year listed and also the net periodic benefit cost for the following year. Year Ended December 31, 2019 2018 Discount rate 3.1 % 3.8 % Weighted average health care trend rate 4.9 % 4.9 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following assets and liabilities of the Company were measured at fair value on a recurring basis subject to the disclosure requirements of ASC 820, “Fair Value Measurement,” as of December 31, 2019 and 2018: Fair Value Measurements as of December 31, 2019 Fair Value Measurements as of December 31, 2018 December 31, 2019 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2018 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Term deposits $ 17 $ 17 $ — $ — $ 16 $ 16 $ — $ — Interest rate swaps — — — — 675 — 675 — Total assets $ 17 $ 17 $ — $ — $ 691 $ 16 $ 675 $ — Interest rate swaps $ 480 $ — $ 480 $ — $ — $ — $ — $ — Total liabilities $ 480 $ — $ 480 $ — $ — $ — $ — $ —

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Product Warranty Liability	The following table sets forth the Company’s product warranty accrual: Warranty Liability Balance as of December 31, 2018 $ 2,057 Additions to warranty liability 767 Warranty liability utilized (1,602) Balance as of December 31, 2019 $ 1,222
Schedule of Future Payments of Legal Settlements	The expected payments under the UPRR settlement agreement for the year ending December 31, 2020 and thereafter were as follows: Year Ending December 31, 2020 $ 8,000 2021 8,000 2022 8,000 2023 8,000 2024 8,000 Total $ 40,000
Environmental Loss Contingencies	The following table sets forth the Company’s undiscounted environmental obligation: Environmental Liability Balance as of December 31, 2018 $ 6,128 Additions to environmental obligations 54 Environmental obligations utilized (114) Balance as of December 31, 2019 $ 6,068

Other Expense (Income) (Tables)

Other Expense (Income) (Tables)	12 Months Ended
	Dec. 31, 2017
Other Income and Expenses [Abstract]
Other Income	The following table summarizes the Company’s other expense (income) for the years ended December 31, 2019 and 2018. 2019 2018 Loss on U.S. pension settlement (a) $ 2,210 $ — Loss on Construction Segment relocation and closure activities (b) 1,768 — Loss on Tubular and Energy Segment closure activities (c) 1,716 — Loss on Tubular and Energy Segment asset sale (d) — 269 Loss on Tubular and Energy Segment fixed asset sales or disposals (e) — 786 Gain on prior Rail Segment warranty claim (f) — (525) Foreign currency losses (gains) 202 (483) Other (1,404) (508) Other expense (income) - net $ 4,492 $ (461) a. In the fourth quarter of 2019, the Company recorded an expense of $2,210 resulting from settlements within our U.S. defined benefit pension plan. b. During the fourth quarter of 2019, the Company announced and commenced the relocation and closure of the Spokane, WA concrete products facility and the subsequent relocation to Boise, ID, which was completed during the first quarter of 2020. This activity resulted in expense of $1,768 within the Construction Products segment. c. In 2019, three sites within the Tubular and Energy Services segment ceased operations or were held for sale, resulting in closure costs of $1,716. d. On June 19, 2018, the Company sold 54.5 acres of land in Willis, TX for $2,047, resulting in a pretax loss of $269 within our Tubular and Energy Services segment. e. During 2018, the Tubular and Energy Services segment sold or disposed of certain non-core assets, which resulted in a loss of $786. f. In 2018, the Rail Products and Services segment received a reimbursement of $525 for a 2016 warranty claim on a transit project.

Quarterly Financial Informati_2

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarterly financial information for the years ended December 31, 2019 and 2018 is presented below: Three Months Ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 Net sales $ 150,469 $ 200,933 $ 154,276 $ 149,379 Gross profit $ 29,162 $ 37,128 $ 27,692 $ 27,390 Net income $ 3,690 $ 9,564 $ 3,064 $ 26,250 Basic earnings per common share $ 0.36 $ 0.92 $ 0.29 $ 2.52 Diluted earnings per common share $ 0.35 $ 0.90 $ 0.29 $ 2.46 Three Months Ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 Net sales $ 122,454 $ 172,890 $ 167,094 $ 164,531 Gross profit $ 22,192 $ 33,063 $ 31,303 $ 30,601 Net (loss) income $ (1,858) $ 5,434 $ 6,408 $ (41,152) Basic (loss) earnings per common share $ (0.18) $ 0.52 $ 0.62 $ (3.97) Diluted (loss) earnings per common share $ (0.18) $ 0.52 $ 0.61 $ (3.97)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Property, Plant and Equipment
Cash and cash equivalents	$ 14,178,000	$ 10,282,000
Impairments of long lived assets	0	0
Goodwill impairment	0	0
Impairment of finite lived intangible assets	0	0
Accrued warranty	1,222,000	2,057,000
Foreign currency transaction loss	202,000	(483,000)
Research and development expenses	2,614,000	2,646,000
Accumulated other comprehensive loss	$ (20,183,000)	(22,191,000)
Accounting Standards Update 2018-02 | Reclassified
Property, Plant and Equipment
Accumulated other comprehensive loss			$ 633,000
Buildings | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	7 years
Buildings | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	40 years
Machinery and equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	13 years
Leasehold improvements | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	6 years
Leasehold improvements | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	10 years
Non Domestic
Property, Plant and Equipment
Cash and cash equivalents	$ 13,660,000	8,058,000
Bank term deposits	$ 17,000	$ 16,000

Business Segments - Narratives

Business Segments - Narratives (Details)	12 Months Ended
	Dec. 31, 2019segment
Segment Reporting [Abstract]
Number of reporting segments	3

Business Segments - Reconciliat

Business Segments - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information
Net Sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Segment Profit									36,514	38,913
Segment Assets	405,171				383,249				405,171	383,249
Depreciation/Amortization									17,631	18,593
Expenditures for Long-Lived Assets									8,831	5,251
Rail Products and Services
Segment Reporting Information
Net Sales									321,808	319,524
Construction Products
Segment Reporting Information
Net Sales									182,486	158,653
Tubular and Energy Services
Segment Reporting Information
Net Sales									150,763	148,792
Operating Segments
Segment Reporting Information
Net Sales									655,057	626,969
Segment Profit									36,514	38,913
Segment Assets	346,692				363,239				346,692	363,239
Depreciation/Amortization									16,303	17,328
Expenditures for Long-Lived Assets									8,479	4,949
Operating Segments | Rail Products and Services
Segment Reporting Information
Net Sales									321,808	319,524
Segment Profit									19,641	19,468
Segment Assets	186,323				175,704				186,323	175,704
Depreciation/Amortization									6,469	6,810
Expenditures for Long-Lived Assets									2,293	941
Operating Segments | Construction Products
Segment Reporting Information
Net Sales									182,486	158,653
Segment Profit									5,726	6,798
Segment Assets	83,049				97,133				83,049	97,133
Depreciation/Amortization									1,660	1,728
Expenditures for Long-Lived Assets									1,266	796
Operating Segments | Tubular and Energy Services
Segment Reporting Information
Net Sales									150,763	148,792
Segment Profit									11,147	12,647
Segment Assets	$ 77,320				$ 90,402				77,320	90,402
Depreciation/Amortization									8,174	8,790
Expenditures for Long-Lived Assets									$ 4,920	$ 3,212

Business Segments - Reconcili_2

Business Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income from Operations
Total segment profit	$ 36,514	$ 38,913
Interest expense - net	(4,920)	(6,154)
Other (expense) income	(4,492)	461
Concrete Tie Settlement expense (Note 18)	0	(43,400)
Corporate expense and other unallocated charges	(9,705)	(16,531)
Income (loss) before income taxes	17,397	(26,711)
Assets
Segment Assets	405,171	383,249
Depreciation/Amortization
Depreciation/Amortization	17,631	18,593
Expenditures for Long-Lived Assets
Expenditures for Long-Lived Assets	8,831	5,251
Operating Segments
Income from Operations
Total segment profit	36,514	38,913
Assets
Segment Assets	346,692	363,239
Depreciation/Amortization
Depreciation/Amortization	16,303	17,328
Expenditures for Long-Lived Assets
Expenditures for Long-Lived Assets	8,479	4,949
Unallocated corporate assets
Assets
Segment Assets	58,479	20,010
Depreciation/Amortization
Depreciation/Amortization	1,328	1,265
Expenditures for Long-Lived Assets
Expenditures for Long-Lived Assets	$ 352	$ 302

Business Segments - Sales by Ge

Business Segments - Sales by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
United States
Revenues from External Customers and Long-Lived Assets
Net Sales									529,363	484,907
Canada
Revenues from External Customers and Long-Lived Assets
Net Sales									41,879	66,451
United Kingdom
Revenues from External Customers and Long-Lived Assets
Net Sales									57,574	42,810
Other
Revenues from External Customers and Long-Lived Assets
Net Sales									$ 26,241	$ 32,801

Business Segments - Long-Lived

Business Segments - Long-Lived Assets By Geographical Location (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information
Long-Lived assets	$ 82,314	$ 86,857
United States
Segment Reporting Information
Long-Lived assets	77,101	81,135
United Kingdom
Segment Reporting Information
Long-Lived assets	1,610	1,671
Canada
Segment Reporting Information
Long-Lived assets	3,590	4,036
Other
Segment Reporting Information
Long-Lived assets	$ 13	$ 15

Business Segment - Sales by Maj

Business Segment - Sales by Major Product Line (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer
Net Sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Rail Products
Revenue from External Customer
Net Sales									194,464	188,590
Rail Technologies
Revenue from External Customer
Net Sales									127,344	130,934
Piling and Fabricated Bridges Products
Revenue from External Customer
Net Sales									114,076	102,246
Protective Coating and Measurement Systems
Revenue from External Customer
Net Sales									99,760	89,026
Test , Inspection and Threading Services
Revenue from External Customer
Net Sales									68,410	56,407
Precast Concrete Products
Revenue from External Customer
Net Sales									$ 51,003	$ 59,766

Revenue - Narratives (Details)

Revenue - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue
Total net sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Contract with customer, assets	37,032				26,692				37,032	26,692
Contract liabilities	$ 4,472				$ 1,505				4,472	1,505
Contract assets transferred to receivables									24,487	18,941
Revenue recognized from contract liability									1,462	1,141
Cash proceeds from liability contract									$ 4,358	$ 1,447
Over time
Disaggregation of Revenue
Customer revenue transferred (percentage)									28.50%	26.00%
Total net sales									$ 186,775	$ 163,253
Over time | Performance Based
Disaggregation of Revenue
Total net sales									136,014	121,919
Over time | Delivery Based
Disaggregation of Revenue
Total net sales									$ 50,761	$ 41,334
Point in time
Disaggregation of Revenue
Customer revenue transferred (percentage)									71.50%	74.00%
Total net sales									$ 468,282	$ 463,716

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue
Total net sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Rail Products and Services
Disaggregation of Revenue
Total net sales									321,808	319,524
Rail Products and Services | Rail Products
Disaggregation of Revenue
Total net sales									194,464	188,590
Rail Products and Services | Rail Technologies
Disaggregation of Revenue
Total net sales									127,344	130,934
Construction Products
Disaggregation of Revenue
Total net sales									182,486	158,653
Construction Products | Piling and Fabricated Bridge
Disaggregation of Revenue
Total net sales									114,076	102,246
Construction Products | Precast Concrete Products
Disaggregation of Revenue
Total net sales									68,410	56,407
Tubular and Energy Services
Disaggregation of Revenue
Total net sales									150,763	148,792
Tubular and Energy Services | Test Inspection and Threading
Disaggregation of Revenue
Total net sales									51,003	59,766
Tubular and Energy Services | Protective Coating and Measurements Systems
Disaggregation of Revenue
Total net sales									$ 99,760	$ 89,026

Revenue - Timing of Transfer (D

Revenue - Timing of Transfer (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue
Total net sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Point in time
Disaggregation of Revenue
Total net sales									468,282	463,716
Over time
Disaggregation of Revenue
Total net sales									186,775	163,253
Rail Products and Services
Disaggregation of Revenue
Total net sales									321,808	319,524
Rail Products and Services | Point in time
Disaggregation of Revenue
Total net sales									240,047	232,814
Rail Products and Services | Over time
Disaggregation of Revenue
Total net sales									81,761	86,710
Construction Products
Disaggregation of Revenue
Total net sales									182,486	158,653
Construction Products | Point in time
Disaggregation of Revenue
Total net sales									115,590	106,168
Construction Products | Over time
Disaggregation of Revenue
Total net sales									66,896	52,485
Tubular and Energy Services
Disaggregation of Revenue
Total net sales									150,763	148,792
Tubular and Energy Services | Point in time
Disaggregation of Revenue
Total net sales									112,645	124,734
Tubular and Energy Services | Over time
Disaggregation of Revenue
Total net sales									$ 38,118	$ 24,058

Revenue - Remaining Performance

Revenue - Remaining Performance Obligation (Details) $ in Thousands	Dec. 31, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Revenue remaining performance obligation	$ 230,067
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue remaining performance obligation (percentage)	8.30%
Performance obligations expected to be satisfied, expected timing	1 year

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Amortization expense	$ 6,577	$ 7,098
Non-compete agreements
Fully amortized intangible asset	124	2,830
Trademarks and trade names
Fully amortized intangible asset	$ 723	$ 1,560
Minimum
Finite lived intangible asset, useful life	4 years
Maximum
Finite lived intangible asset, useful life	25 years
Weighted Average
Finite lived intangible asset, useful life	16 years

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Goodwill
Goodwill, beginning balance	$ 19,258
Foreign currency translation impact	307
Goodwill, ending balance	19,565
Rail Products and Services
Goodwill
Goodwill, beginning balance	14,111
Foreign currency translation impact	307
Goodwill, ending balance	14,418
Construction Products
Goodwill
Goodwill, beginning balance	5,147
Foreign currency translation impact	0
Goodwill, ending balance	5,147
Tubular and Energy Services
Goodwill
Goodwill, beginning balance	0
Foreign currency translation impact	0
Goodwill, ending balance	$ 0

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Gross Carrying Value	$ 82,662	$ 82,980
Accumulated Amortization	(39,148)	(33,144)
Net Carrying Amount	43,514	49,836
Non-compete agreements
Finite-Lived Intangible Assets
Gross Carrying Value	1,272	1,372
Accumulated Amortization	(1,259)	(1,046)
Net Carrying Amount	13	326
Patents
Finite-Lived Intangible Assets
Gross Carrying Value	377	358
Accumulated Amortization	(188)	(165)
Net Carrying Amount	189	193
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Value	37,498	37,129
Accumulated Amortization	(13,945)	(11,388)
Net Carrying Amount	23,553	25,741
Trademarks and trade names
Finite-Lived Intangible Assets
Gross Carrying Value	7,787	8,481
Accumulated Amortization	(3,551)	(3,416)
Net Carrying Amount	4,236	5,065
Technology
Finite-Lived Intangible Assets
Gross Carrying Value	35,728	35,640
Accumulated Amortization	(20,205)	(17,129)
Net Carrying Amount	$ 15,523	$ 18,511
Weighted Average
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	16 years
Weighted Average | Non-compete agreements
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	4 years	4 years
Weighted Average | Patents
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	10 years	10 years
Weighted Average | Customer relationships
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	18 years	18 years
Weighted Average | Trademarks and trade names
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	16 years	15 years
Weighted Average | Technology
Finite-Lived Intangible Assets
Weighted Average Amortization Period In Years	13 years	14 years

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Expected Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 5,910
2021	5,875
2022	5,791
2023	5,314
2024	4,288
2025 and thereafter	16,336
Net Carrying Amount	$ 43,514	$ 49,836

Accounts Receivable (Details)

Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Accounts receivable	$ 79,675	$ 87,055
Allowance for doubtful accounts	(1,100)	(932)
Accounts receivable - net	$ 78,575	$ 86,123

Accounts Receivable (Narratives

Accounts Receivable (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Reserve for uncollectable accounts	$ (48)	$ (1,443)

Accounts Receivable (Segment) (

Accounts Receivable (Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable
Trade, net	$ 78,447	$ 82,299
Rail Products and Services
Accounts Receivable
Trade, net	44,941	43,180
Construction Products
Accounts Receivable
Trade, net	19,301	19,998
Tubular and Energy Services
Accounts Receivable
Trade, net	$ 14,205	$ 19,121

Inventory - Schedule of Invento

Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 59,864	$ 69,041
Contract assets	37,032	26,692
Work-in-process	3,728	6,940
Raw materials	18,677	21,831
Inventory	$ 119,301	$ 124,504

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)a	Dec. 31, 2018USD ($)	Jun. 19, 2018a
Property, Plant and Equipment
Gross property, plant, and equipment	$ 191,322	$ 188,655
Less: accumulated depreciation and amortization, including accumulated amortization of finance leases	(109,008)	(101,798)
Property, plant, and equipment - net	82,314	86,857
Depreciation	11,054	11,495
Proceeds from the sale of property, plant, and equipment	1,151	2,389
Land in Willis, TX | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Tubular and Energy Services
Property, Plant and Equipment
Area of land (in acres) | a			54.5
Proceeds from the sale of property, plant, and equipment		2,047
Gain (loss) on sale	1,768	0
Ball Winch Field Service | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Tubular and Energy Services
Property, Plant and Equipment
Gain (Loss) on Disposition of Assets	0	(269)
Land
Property, Plant and Equipment
Gross property, plant, and equipment	$ 11,076	12,440
Area of land (in acres) | a	54.5
Improvements to land and leaseholds
Property, Plant and Equipment
Gross property, plant, and equipment	$ 17,172	17,610
Buildings
Property, Plant and Equipment
Gross property, plant, and equipment	35,241	34,608
Machinery and equipment, including equipment under capitalized leases
Property, Plant and Equipment
Gross property, plant, and equipment	122,599	120,914
Construction in progress
Property, Plant and Equipment
Gross property, plant, and equipment	5,234	$ 3,083
Land and Building
Property, Plant and Equipment
Proceeds from the sale of property, plant, and equipment	900
Gain (loss) on sale	$ (198)

Leases - Narratives (Details)

Leases - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description
Operating lease right-of-use assets	$ 13,274
Other current liabilities	3,006
Long-term operating lease liabilities	$ 10,268
Lessee lease renewal term	12 years
Lessee, lease, termination period	1 year
Operating lease weighted average lease term	7 years
Operating lease weighted average discount rate (percent)	5.10%
Finance lease weighted average remaining lease term	1 year
Finance lease weighted average discount rate (percent)	4.30%
Minimum
Lessee, Lease, Description
Lessee remaining lease term	1 year
Maximum
Lessee, Lease, Description
Lessee remaining lease term	12 years
ASU 2016-02
Lessee, Lease, Description
Operating lease right-of-use assets		$ 13,585
Other current liabilities		3,322
Long-term operating lease liabilities		$ 10,263

Leases - Balance Sheet Location

Leases - Balance Sheet Location (Details) $ in Thousands	Dec. 31, 2019USD ($)
Operating leases
Operating lease right-of-use assets	$ 13,274
Other current liabilities	3,006
Long-term operating lease liabilities	10,268
Total operating lease liabilities	13,274
Finance leases
Property, plant, and equipment	3,518
Property, plant, and equipment	(2,943)
Property, plant, and equipment - net	575
Current maturities of long-term debt	405
Long-term debt	170
Total finance lease liabilities	$ 575

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lease, Cost
Amortization of finance leases	$ 722	$ 731
Interest on lease liabilities	57	50
Operating lease cost	3,930	4,825
Sublease income	(18)	(37)
Total lease cost	$ 4,691	$ 5,569

Leases - Cash Flows Components

Leases - Cash Flows Components (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ (4,676)
Financing cash flows from finance leases	(722)
Operating leases	$ 3,619

Leases - Estimated Annual Matur

Leases - Estimated Annual Maturities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Operating Leases
2020	$ 3,351
2021	2,384
2022	1,852
2023	1,640
2024	1,540
2025 and there after	4,033
Operating lease, liability, payments, due	14,800
Interest	(1,526)
Total operating lease liabilities	13,274
Finance Leases
2020	450
2021	131
2022	47
2023	17
2024	11
2025 and there after	0
Finance lease liability, payments, due	656
Interest	(81)
Total finance lease liabilities	$ 575

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments
Proceeds from sale of equity method investment	$ 0	$ 3,875
Repayment of revolving line of credit from equity method investment	$ 0	$ 1,235

Deferred Revenue (Details)

Deferred Revenue (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Deferred revenue	$ 8,446	$ 6,619
Contract liabilities	$ 4,472	$ 1,505

Long-Term Debt and Related Ma_3

Long-Term Debt and Related Matters - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Revolving credit facility	$ 33,868	$ 74,008
Term loan	23,750	0
Lease obligations payable in installments through 2020 with a weighted average interest rate of 3.32% as of December 31, 2018 and 3.21% as of December 31, 2017	575	974
Total	58,193	74,982
Less: current maturities	(2,905)	(629)
Long-term debt	$ 55,288	$ 74,353
Interest rate on credit facility (percent)	4.28%	4.80%
Accounts payable, interest-bearing, interest rate	4.19%
Weighted average interest rate on debt (percent)	3.63%	3.32%

Long-Term Debt and Related Ma_4

Long-Term Debt and Related Matters - Schedule of Long Term Debt Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2020	$ 2,905
2021	2,604
2022	2,545
2023	2,510
2024	47,629
2025 and thereafter	0
Total	$ 58,193	$ 74,982

Long-Term Debt and Related Ma_5

Long-Term Debt and Related Matters - Narrative - North America (Details)	Apr. 30, 2019USD ($)	Nov. 07, 2016USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)	Jun. 29, 2016USD ($)
Line of Credit Facility
Term loan			$ 0	$ 23,750,000
Line of credit facility, amount outstanding			$ 74,008,000	33,868,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company
Line of Credit Facility
Line of credit facility, maximum borrowing capacity	$ 195,000,000				$ 140,000,000
Term loan		$ 25,000,000
Leverage ratio in effect for the eighth quarter and remainder of a credit agreement		25,000,000
EBITDA required				$ 3.25
Fixed charge coverage ratio			3.50
Fixed charge coverage ratio after fifth quarter				1.40
Minimum Consolidated Fixed Charge Coverage Ratio				1.25
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility
Line of Credit Facility
Line of credit facility, amount outstanding			$ 425,000	$ 492,000
Line of credit facility, current borrowing capacity			$ 120,567,000	$ 105,640,000
Line of Credit Facility, Potential Increase To Borrowing Capacity	$ 50,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate
Line of Credit Facility
Debt instrument, basis spread on variable rate	100.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate | Minimum
Line of Credit Facility
Debt instrument, basis spread on variable rate	125.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate | Maximum
Line of Credit Facility
Debt instrument, basis spread on variable rate	225.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Base Rate | Minimum
Line of Credit Facility
Debt instrument, basis spread on variable rate	25.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Base Rate | Maximum
Line of Credit Facility
Debt instrument, basis spread on variable rate	12500.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Prime Rate
Line of Credit Facility
Debt instrument, basis spread on variable rate	50.00%

Long-Term Debt and Related Ma_6

Long-Term Debt and Related Matters - Narrative - United Kingdom (Details)	Dec. 31, 2019USD ($)	Apr. 29, 2019USD ($)	Apr. 29, 2019GBP (£)	Dec. 31, 2018USD ($)
Line of Credit Facility
Line of credit facility, amount outstanding	$ 33,868,000			$ 74,008,000
Foreign Line of Credit | Natwest Bank
Line of Credit Facility
Line of credit facility, maximum borrowing capacity			£ 1,500,000	1,924,000
Line of credit facility, amount outstanding		$ 0
Line of credit facility, current borrowing capacity				$ 1,606,000
Foreign Line of Credit | Natwest Bank Outstanding Guarantees
Line of Credit Facility
Line of credit facility, amount outstanding		$ 318,000

Stockholders' Equity - Narrativ

Stockholders' Equity - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Common stock, shares authorized (shares)	20,000,000	20,000,000
Common stock, issued (shares)	11,115,779	11,115,779
Common stock, par value (per share)	$ 0.01	$ 0.01
Shares paid for tax withholding (shares)	34,198	11,445
Adjustments related to tax withholding	$ 620	$ 316
Treasury shares acquired (shares)	0	0

Stockholders' Equity - Rollforw

Stockholders' Equity - Rollforward of Common Stock (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	10,366,007
Ending (shares)	10,422,091	10,366,007
Treasury
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	749,772	775,203
Issued for stock-based compensation plans (shares)	(56,084)	(25,431)
Ending (shares)	693,688	749,772
Common Stock
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	10,366,007	10,340,576
Issued for stock-based compensation plans (shares)	56,084	25,431
Ending (shares)	10,422,091	10,366,007

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Loss
Stockholders' equity	$ 169,862	$ 122,119	$ 154,496
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
Stockholders' equity	(20,183)	(22,191)	$ (17,767)
Pension and post-retirement benefit plan adjustment
Accumulated Other Comprehensive Loss
Stockholders' equity	(2,959)	(3,839)
Unrealized gain on interest rate swap contracts
Accumulated Other Comprehensive Loss
Stockholders' equity	(230)	675
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss
Stockholders' equity	$ (16,994)	$ (19,027)

Earning Per Common Share - Sche

Earning Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Numerator for basic and diluted earnings per common share:
Net income (loss)	$ 26,250	$ 3,064	$ 9,564	$ 3,690	$ (41,152)	$ 6,408	$ 5,434	$ (1,858)	$ 42,568	$ (31,168)
Denominator:
Weighted average shares outstanding (shares)									10,410	10,362
Denominator for basic earnings per common share (shares)									10,410	10,362
Effect of dilutive securities:
Other stock compensation plans (shares)									234	0
Dilutive potential common shares (shares)									234	0
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (shares)									10,644	10,362
Basic (loss) earnings per common share (usd per share)	$ 2.52	$ 0.29	$ 0.92	$ 0.36	$ (3.97)	$ 0.62	$ 0.52	$ (0.18)	$ 4.09	$ (3.01)
Diluted (loss) earnings per common share (usd per share)	$ 2.46	$ 0.29	$ 0.90	$ 0.35	$ (3.97)	$ 0.61	$ 0.52	$ (0.18)	$ 4	$ (3.01)
Anti-dilutive share, shares										117

Income Taxes - Income Before In

Income Taxes - Income Before Income Tax Domestic And Foreign Components Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ 12,230	$ (34,608)
Foreign	5,167	7,897
Income (loss) before income taxes	$ 17,397	$ (26,711)

Income Taxes - Significant Comp

Income Taxes - Significant Components Of The Provision For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 1,909	$ 2,208
State	505	172
Foreign	1,925	3,675
Total current	4,339	6,055
Deferred
Federal	(22,835)	(55)
State	(6,173)	(8)
Foreign	(502)	(1,535)
Total deferred	(29,510)	(1,598)
Total income tax expense	$ (25,171)	$ 4,457

Income Taxes - Reconciliation O

Income Taxes - Reconciliation Of Income Tax Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount
Statutory rate	$ 3,653	$ (5,609)
Foreign tax rate differential	129	156
State income taxes, net of federal benefit	(59)	(706)
Non-deductible expenses	345	261
Global intangible low-taxed income	145	171
Income tax credit	(126)	(633)
Nondeductable executive compensation	234	351
Tax on unremitted foreign earning	216	149
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(29,635)	10,226
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(73)	91
Total income tax expense	$ (25,171)	$ 4,457
Effective Income Tax Rate Reconciliation, Percent
Statutory rate	21.00%	21.00%
Foreign tax rate differential	0.70%	(0.60%)
State income tax rate, net of federal benefit	(0.30%)	2.60%
Non-deductible expenses	2.00%	(1.00%)
Global intangible low-taxed income	0.80%	(0.60%)
Income tax credit	0.70%	(2.40%)
Nondeductable executive compensation	1.30%	(1.30%)
Tax on unremitted foreign earnings	1.20%	(0.60%)
Change in valuation allowance	(170.30%)	(38.30%)
Other	(0.40%)	(0.30%)
Total income tax expense/ Effective rate	(144.70%)	(16.70%)

Income Taxes - Significant Co_2

Income Taxes - Significant Components Of Deferred Tax Liabilities And Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Goodwill and other intangible assets	$ 17,028	$ 18,756
Accrued settlement	10,196	11,933
Pension and post-retirement liability	1,414	1,524
Warranty reserve	294	346
Deferred compensation	3,620	2,940
Contingent liability	1,816	1,663
Net operating loss/tax credit carryforward	1,438	1,602
Accounts receivable	261	214
Other	725	644
Total deferred tax assets	36,792	39,622
Less: valuation allowance	(1,072)	(30,707)
Net deferred tax asset	35,720	8,915
Deferred tax liabilities
Goodwill and other intangibles	(4,454)	(5,020)
Depreciation	(5,946)	(6,625)
Unremiited earnings of foreign subsidiary	(390)	(160)
Inventory	(946)	(2,125)
Other	(97)	(272)
Total deferred tax liability	(11,833)	(14,202)
Net deferred tax assets (liabilities)	$ 23,887
Net deferred tax assets (liabilities)		$ 5,287

Income Taxes - Narratives (Deta

Income Taxes - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards
Foreign earnings repatriated	$ 7,800
Unremiited earnings of foreign subsidiary	390	$ 160
Valuation allowance, increase (decrease)	(29,648)
Net deferred tax asset	35,720	8,915
Deferred tax asset valuation allowance	1,072	30,707
Deferred tax assets, tax credit carryforwards, foreign	34
Operating loss carryforward, valuation allowance	650
Unrecognized tax benefit that would impact effective tax rate	414
Accrued interest and penalties	327	398
State and local
Operating Loss Carryforwards
Deferred tax asset valuation allowance	388
Operating loss carryforwards	901	$ 1,253
Foreign tax authority
Operating Loss Carryforwards
Tax credit carryforward, amount	34
Foreign tax authority | Secretariat of the Federal Revenue Bureau of Brazil
Operating Loss Carryforwards
Operating loss carryforwards	$ 2,019

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation Of Unrecognized Tax Benefits Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Unrecognized tax benefit beginning of period:	$ 481	$ 599
Decrease based on tax position for prior periods	(67)	(118)
Balance at end of period	$ 414	$ 481

Stock-based Compensation - Narr

Stock-based Compensation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation	$ 3,155,000	$ 3,836,000
Expected cost on shares expected to vest	$ 3,576,000
Recognition period for compensation expense not yet recognized	3 years 2 months 12 days
Weighted average shares granted (usd per share)	$ 18.63	$ 27.05
Fully Vested and Restricted Stock | Director
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation	$ 526,000	$ 880,000
Granted (shares)	21,532	24,427
Weighted average shares granted (usd per share)	$ 24.38	$ 23.64
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)	12,304	14,914
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)	62,125	62,320
Restricted Stock | Vesting period one
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period	4 years
Restricted Stock | Vesting period two
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period	3 years
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)	89,092	65,421
Vesting period	3 years
Restricted Stock And Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation	$ 2,630,000	$ 2,956,000
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation	$ 0	$ 0
Share-based compensation, number of shares authorized (shares)	2,058,000
Shares granted in period (shares)	0	0

Stock-based Compensation - Rest

Stock-based Compensation - Restricted Stock Deferred Stock, and Performance Share Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Weighted average share price, beginning balance (usd per share)	$ 18.61	$ 16.53
Weighted average shares granted (usd per share)	18.63	27.05
Weighted average shares vested (usd per share)	19.61	28.07
Weighted average shares adjustment for incentive awards expected to vest (usd per share)	24.30	26.93
Weighted average shares canceled and forfeited (usd per share)	20.79	16.38
Weighted average share price, ending balance (usd per share)	$ 18.50	$ 18.61
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Nonvested Shares, Outstanding, Beginning Balance (shares)	191,825	186,806
Granted (shares)	62,125	62,320
Vested (shares)	(90,282)	(36,876)
Adjustment for incentive awards expected to vest (shares)	0	0
Canceled and forfeited (shares)	(12,869)	(20,425)
Nonvested Shares, Outstanding, Ending Balance (shares)	150,799	191,825
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Nonvested Shares, Outstanding, Beginning Balance (shares)	41,774	26,860
Granted (shares)	12,304	14,914
Vested (shares)	0	0
Adjustment for incentive awards expected to vest (shares)	0	0
Canceled and forfeited (shares)	0	0
Nonvested Shares, Outstanding, Ending Balance (shares)	54,078	41,774
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Nonvested Shares, Outstanding, Beginning Balance (shares)	300,373	181,341
Granted (shares)	89,092	65,421
Vested (shares)	0	0
Adjustment for incentive awards expected to vest (shares)	(52,180)	65,491
Canceled and forfeited (shares)	(6,137)	(11,880)
Nonvested Shares, Outstanding, Ending Balance (shares)	331,148	300,373

Retirement Plans - Narrative (D

Retirement Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)plan	Dec. 31, 2018USD ($)	Dec. 31, 2017plan
Defined Benefit Plan Disclosure
Net loss to be recognize during the next fiscal period	$ 47
United States
Defined Benefit Plan Disclosure
Defined benefit plans, estimated future employer contributions in current fiscal year	$ 660
Pension Plan
Defined Benefit Plan Disclosure
Defined contribution plan number | plan	6
Pension Plan | United States
Defined Benefit Plan Disclosure
Number of retirement plans | plan	3
Number of defined benefit plans | plan	1
Defined contribution plan number | plan	2
Accrued pension obligation	$ 3,449	$ 4,249
Defined benefit plan, contributions	$ 550	0
Pension Plan | Canada
Defined Benefit Plan Disclosure
Defined contribution plan number | plan	2
Pension Plan | United Kingdom
Defined Benefit Plan Disclosure
Number of defined benefit plans | plan			0
Defined contribution plan number | plan	2
Defined benefit plans, estimated future employer contributions in current fiscal year	$ 318
Accrued pension obligation	1,811	1,403
Defined benefit plan, contributions	$ 314	271
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure
Service period	10 years
Other Postretirement Benefits Plan | Rail Technologies
Defined Benefit Plan Disclosure
Accrued pension obligation	$ 840	$ 724

Retirement Plans - Schedule of

Retirement Plans - Schedule of Benefit Obligation, Fair Value of Assets, and Funded Status of the Plans (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
United States
Change in benefit obligation
Benefit obligation at beginning of year	$ 16,717	$ 18,783
Interest cost	648	622
Actuarial loss (gain)	400	(1,249)
Benefits paid	(840)	(1,439)
Settlements	(9,116)	0
Benefit obligation at end of year	7,809	16,717
Change in plan asset
Fair value of assets at beginning of year	12,468	14,892
Actual gain (loss) on plan assets	1,298	(985)
Employer contribution	550	0
Benefits paid	(840)	(1,439)
Settlements	(9,116)	0
Fair value of assets at end of year	4,360	12,468
Funded status at end of year	(3,449)	(4,249)
Amount recognized in the consolidated balance sheet consists of:
Other long-term liabilities	(3,449)	(4,249)
Amounts recognized in accumulated other comprehensive income consists of:
Net loss	1,893	4,406
United Kingdom
Change in benefit obligation
Benefit obligation at beginning of year	7,750	8,335
Interest cost	221	194
Actuarial loss (gain)	1,142	(201)
Benefits paid	(326)	(292)
Foreign currency exchange rate changes	314	(475)
Benefit obligation at end of year	9,101	7,750
Change in plan asset
Fair value of assets at beginning of year	6,347	6,904
Actual gain (loss) on plan assets	697	(144)
Employer contribution	314	271
Benefits paid	(326)	(292)
Foreign currency exchange rate changes	258	(392)
Fair value of assets at end of year	7,290	6,347
Funded status at end of year	(1,811)	(1,403)
Amount recognized in the consolidated balance sheet consists of:
Other long-term liabilities	(1,811)	(1,403)
Amounts recognized in accumulated other comprehensive income consists of:
Net loss	1,641	1,116
Prior service cost	172	208
Defined benefit plan, comprehensive (income) loss	$ 1,813	$ 1,324

Retirement Plans - Schedule O_2

Retirement Plans - Schedule Of Net Benefit Costs (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
United States
Components of net periodic benefit costs
Interest cost	$ 648	$ 622
Expected return on plan assets	(719)	(853)
Recognized net actuarial loss	125	96
Net periodic pension (income) cost	54	(135)
Settlement charge	2,210	0
Total pension expense (income)	2,264	(135)
United Kingdom
Components of net periodic benefit costs
Interest cost	221	194
Expected return on plan assets	(252)	(260)
Amortization of prior service costs and transition amount	25	42
Recognized net actuarial loss	263	208
Net periodic pension (income) cost	$ 257	$ 184

Retirement Plans - Actuarial As

Retirement Plans - Actuarial Assumptions (Details) - Pension Plan	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
United States
Defined Benefit Plan Disclosure
Discount rate	4.00%	3.40%
Expected rate of return on plan assets	5.90%	5.90%
United Kingdom
Defined Benefit Plan Disclosure
Discount rate	2.00%	2.80%
Expected rate of return on plan assets	3.30%	3.80%

Retirement Plans - Accumulated

Retirement Plans - Accumulated Benefit Obligations in Excess of Plan Asset (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
United States
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 7,809	$ 16,717	$ 18,783
Accumulated benefit obligation	7,809	16,717
Fair value of plan asset	4,360	12,468	14,892
United Kingdom
Defined Benefit Plan Disclosure
Projected benefit obligation	9,101	7,750	8,335
Accumulated benefit obligation	9,101	7,750
Fair value of plan asset	$ 7,290	$ 6,347	$ 6,904

Retirement Plans - Plan Asset I

Retirement Plans - Plan Asset Investment Allocation Percentage (Details) - Pension Plan	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
United States
Asset Category
Percentage of Plan assets	100.00%	100.00%
United States | Cash and cash equivalents
Asset Category
Percentage of Plan assets	19.00%	3.00%
United States | Cash and cash equivalents | Minimum
Asset Category
Target percentage of plan assets	0.00%
United States | Cash and cash equivalents | Maximum
Asset Category
Target percentage of plan assets	10.00%
United States | Total fixed income
Asset Category
Percentage of Plan assets	30.00%	28.00%
United States | Total fixed income | Minimum
Asset Category
Target percentage of plan assets	25.00%
United States | Total fixed income | Maximum
Asset Category
Target percentage of plan assets	50.00%
United States | Total mutual funds and equities
Asset Category
Percentage of Plan assets	51.00%	69.00%
United States | Total mutual funds and equities | Minimum
Asset Category
Target percentage of plan assets	50.00%
United States | Total mutual funds and equities | Maximum
Asset Category
Target percentage of plan assets	70.00%
United Kingdom | Cash and cash equivalents | Maximum
Asset Category
Target percentage of plan assets			100.00%
United Kingdom | Equity securities | Maximum
Asset Category
Target percentage of plan assets			100.00%
United Kingdom | Commercial property | Maximum
Asset Category
Target percentage of plan assets			50.00%
United Kingdom | U.K. Government securities | Maximum
Asset Category
Target percentage of plan assets			50.00%

Retirement Plans - Information

Retirement Plans - Information About Plan Assets (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
United States
Defined Benefit Plan Disclosure
Fair value of plan asset	$ 4,360	$ 12,468	$ 14,892
United States | Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of plan asset	817	355
United States | Total fixed income
Defined Benefit Plan Disclosure
Fair value of plan asset	1,336	3,521
United States | Corporate bonds
Defined Benefit Plan Disclosure
Fair value of plan asset	1,336	3,521
United States | Total mutual funds and equities
Defined Benefit Plan Disclosure
Fair value of plan asset	2,207	8,592
United States | Mutual funds
Defined Benefit Plan Disclosure
Fair value of plan asset	694	1,881
United States | Equity securities
Defined Benefit Plan Disclosure
Fair value of plan asset	1,513	6,711
United Kingdom
Defined Benefit Plan Disclosure
Fair value of plan asset	7,290	6,347	$ 6,904
United Kingdom | Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of plan asset	516	685
United Kingdom | Bonds
Defined Benefit Plan Disclosure
Fair value of plan asset	3,735	2,866
United Kingdom | Other
Defined Benefit Plan Disclosure
Fair value of plan asset	949	795
United Kingdom | Equity securities
Defined Benefit Plan Disclosure
Fair value of plan asset	$ 2,090	$ 2,001

Retirement Plans - Future Benef

Retirement Plans - Future Benefit Payments (Details) - Pension Plan $ in Thousands	Dec. 31, 2019USD ($)
United States
Defined Benefit Plan, Expected Future Benefit Payment
2020	$ 429
2021	453
2022	457
2023	481
2024	477
Years 2025-2029	2,276
United Kingdom
Defined Benefit Plan, Expected Future Benefit Payment
2020	280
2021	299
2022	312
2023	370
2024	396
Years 2025-2029	$ 1,744

Retirement Plans - Other Post-R

Retirement Plans - Other Post-Retirement Retirement Plan (Details) - Other Postretirement Benefits Plan	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure
Discount rate (percent)	3.10%	3.80%
Weighted average health care trend rate (percent)	4.90%	4.90%
Weighted average health care cost trend (percent)	4.00%

Retirement Plans - Schedule o_3

Retirement Plans - Schedule of Costs of Retirement Plans (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure
Expenses associated with contributions made	$ 2,909	$ 3,406
United States
Defined Contribution Plan Disclosure
Expenses associated with contributions made	2,323	2,762
Canada
Defined Contribution Plan Disclosure
Expenses associated with contributions made	144	193
United Kingdom
Defined Contribution Plan Disclosure
Expenses associated with contributions made	$ 442	$ 451

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Interest expense - net	$ (4,920)	$ (6,154)
Swap
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Derivative, notional amount	50,000
Investment income	$ (114)	$ (34)

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Term deposits	$ 17	$ 16
Interest rate swaps	0	675
Total assets	17	691
Interest rate swaps	480	0
Total liabilities	480	0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Term deposits	17	16
Interest rate swaps	0	0
Total assets	17	16
Interest rate swaps	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Term deposits	0	0
Interest rate swaps	0	675
Total assets	0	675
Interest rate swaps	480	0
Total liabilities	480	0
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Term deposits	0	0
Interest rate swaps	0	0
Total assets	0	0
Interest rate swaps	0	0
Total liabilities	$ 0	$ 0

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Narratives (Details) - USD ($) $ in Thousands	Mar. 13, 2019	Dec. 31, 2019	Dec. 31, 2018
Product Liability Contingency
Accrued warranty		$ 1,222	$ 2,057
Legal fees		0	43,400
Current portion of accrued settlement (Note 18)		8,000	10,000
Accrued legal settlement, non-current		32,000	40,000
Present value or proposed remedial work		1,100,000
Undiscovered remedial work		1,700,000
Uprr
Product Liability Contingency
Purchase commitment	$ 48,000
Annual commitment amount	8,000
Uprr
Product Liability Contingency
Amounts reclassified to accrued settlement		6,600
Litigation settlement amount		40,000	50,000
Litigation settlement amount, current	2,000
Litigation settlement amount, non-current	$ 48,000
Legal fees		$ 43,400
Rail Products and Services
Product Liability Contingency
Product warranty expense			$ 611

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Schedule of Product Warranty Liability (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Movement in Standard Product Warranty Accrual
Beginning balance	$ 2,057
Additions to warranty liability	767
Warranty liability utilized	(1,602)
Ending balance	$ 1,222

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Future Payments of Legal Settlements (Details) - Uprr - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
2020	$ 8,000
2021	8,000
2022	8,000
2023	8,000
2024	8,000
Total	$ 40,000	$ 50,000

Commitments and Contingent Li_5

Commitments and Contingent Liabilities - Environmental Loss Contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Accrual for Environmental Loss Contingencies
Environmental liability, beginning balance	$ 6,128
Additions to environmental obligations	54
Environmental obligations utilized	(114)
Environmental liability, ending balance	$ 6,068

Other Expense (Income) (Details

Other Expense (Income) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 19, 2018a
Condensed Income Statements, Captions
Foreign currency losses (gains)	$ 202	$ (483)
Other	(1,404)	(508)
Other income	(4,492)	461
Proceeds from the sale of property, plant, and equipment	1,151	2,389
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Land in Willis, TX
Condensed Income Statements, Captions
Loss on U.S. pension settlement (a)	2,210	0
Tubular and Energy Services | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Land in Willis, TX
Condensed Income Statements, Captions
Loss on Construction Segment relocation and closure activities (b)	1,768	0
Area of land (in acres) | a			54.5
Proceeds from the sale of property, plant, and equipment		2,047
Tubular and Energy Services | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Ball Winch Field Service
Condensed Income Statements, Captions
Loss on Tubular and Energy Segment asset sale (d)	0	269
Rail Products and Services
Condensed Income Statements, Captions
Loss on Tubular and Energy Segment closure activities (c)	1,716	0
Gain on prior Rail Segment warranty claim (f)	0	(525)
Rail Products and Services | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Condensed Income Statements, Captions
Loss on Tubular and Energy Segment fixed asset sales or disposals (e)	$ 0	$ 786

Quarterly Financial Informati_3

Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 149,379	$ 154,276	$ 200,933	$ 150,469	$ 164,531	$ 167,094	$ 172,890	$ 122,454	$ 655,057	$ 626,969
Gross profit	27,390	27,692	37,128	29,162	30,601	31,303	33,063	22,192	121,372	117,159
Net (loss) income	$ 26,250	$ 3,064	$ 9,564	$ 3,690	$ (41,152)	$ 6,408	$ 5,434	$ (1,858)	$ 42,568	$ (31,168)
Basic (loss) earnings per common share (usd per share)	$ 2.52	$ 0.29	$ 0.92	$ 0.36	$ (3.97)	$ 0.62	$ 0.52	$ (0.18)	$ 4.09	$ (3.01)
Diluted (loss) earnings per common share (usd per share)	$ 2.46	$ 0.29	$ 0.90	$ 0.35	$ (3.97)	$ 0.61	$ 0.52	$ (0.18)	$ 4	$ (3.01)

Uncategorized Items - fstr-2019

Label	Element	Value
Accounting Standards Update 2018-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	633,000
Accounting Standards Update 2018-02 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(633,000)
Accounting Standards Update 2016-06 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (305,000)