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Revenue | 3 Months Ended
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Mar. 31, 2018
Revenue from Contract with Customer [Abstract] |
Revenue | REVENUE On January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers, and all the related amendments using the modified retrospective approach, which did not result in any changes to the previously reported financial information. The updates related to ASU 2014-09 were applied only to contracts that were not complete as of January 1, 2018. The Company’s revenues are comprised of product and service sales as well as 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 service to its customer either when or as its customer obtains control of the product or service. A performance obligation is a promise in a contract to transfer a distinct product or 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 services is not separately identifiable from other promises in the contract and, therefore, not distinct. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the Company’s best estimate of standalone selling price for each distinct product or service in the contract, which is generally based on an observable price. 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. Revenue from products or services transferred to customers over time accounted for 25.5% and 23.2% of revenue for the three months ended March 31, 2018 and 2017, respectively. Revenue under these long-term agreements are 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 $24,561 and $21,610 for the three months ended March 31, 2018 and 2017, 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 $6,661 and $5,963 for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018 and December 31, 2017, the Company had contract assets of $24,862 and $25,320, respectively, that were recorded in inventory within the Condensed Consolidated Balance Sheets. At March 31, 2018 and December 31, 2017, the Company had contract liabilities of $564 and $1,420, respectively, that were recorded in deferred revenue within the Condensed 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 on these above estimates could impact the timing and amount of revenue recognized and, accordingly, the timing and amount of associated income. In the event a contract loss becomes known, the entire amount of the estimated loss is recognized in the Condensed Consolidated Statements of Operations. The majority of the Company’s revenue is from products and services transferred to customers at a point in time and was approximately 74.5% and 76.8% of revenue for the three months ended March 31, 2018 and 2017, 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 its physical location. The following table summarizes the Company's net sales by major product category:
|  | Three Months Ended March 31,
|  | 2018 |  | 2017
Rail Products |  | $ | 36,034 |  |  | $ | 34,365 |
Rail Technologies |  | 26,136 |  |  | 22,115 |
Rail Products and Services |  | 62,170 |  |  | 56,480 |
Piling and Fabricated Bridge |  | 18,861 |  |  | 29,223 |
Precast Concrete Products |  | 10,039 |  |  | 8,099 |
Construction Products |  | 28,900 |  |  | 37,322 |
Test, Inspection, and Threading |  | 14,213 |  |  | 10,882 |
Protective Coatings and Measurement Solutions |  | 17,171 |  |  | 14,018 |
Tubular and Energy Services |  | 31,384 |  |  | 24,900 |
Total net sales |  | $ | 122,454 |  |  | $ | 118,702 |
Net sales by the timing of the transfer of goods and services is as follows:
Three Months Ended March 31, 2018 |  | Rail Products and Services |  | Construction Products |  | Tubular and Energy Services |  | Total
Point in time |  | $ | 45,871 |  |  | $ | 18,926 |  |  | $ | 26,435 |  |  | $ | 91,232 |
Over time |  | 16,299 |  |  | 9,974 |  |  | 4,949 |  |  | 31,222 |
Total net sales |  | $ | 62,170 |  |  | $ | 28,900 |  |  | $ | 31,384 |  |  | $ | 122,454 |
Three Months Ended March 31, 2017 |  | Rail Products and Services |  | Construction Products |  | Tubular and Energy Services |  | Total
Point in time |  | $ | 45,566 |  |  | $ | 24,624 |  |  | $ | 20,939 |  |  | $ | 91,129 |
Over time |  | 10,914 |  |  | 12,698 |  |  | 3,961 |  |  | 27,573 |
Total net sales |  | $ | 56,480 |  |  | $ | 37,322 |  |  | $ | 24,900 |  |  | $ | 118,702 |
The timing of revenue recognition, billings, and cash collections results in billed receivables, costs in excess of billings (contract assets, included in inventory), and billings in excess of costs (contract liabilities, included in deferred revenue) on the Condensed Consolidated Balance Sheets. Significant changes in contract assets during the three months ended March 31, 2018 include transfers to receivables from contract assets recognized at the beginning of the period of $8,366. Significant changes in contract liabilities during the three months ended March 31, 2018 include $401 of revenue recognized that was included in the contract liability at the beginning of the period, and increases of $346 due to billings in excess of costs, excluding amounts recognized as revenue during the period. On March 31, 2018, the Company has approximately $220,301 of remaining performance obligations, which is also referred to as backlog. Approximately 2.7% of the March 31, 2018 backlog is related to projects that are anticipated to extend beyond March 31, 2019.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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