UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the quarterly period ended June 30, 2018

OR

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the transition period from                    to                      .

Commission file number 0001-34145

Primoris Services Corporation

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (214) 740-5600

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes  ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

      If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ☐  No ☒

At August 6, 2018, 51,540,664 shares of the registrant’s common stock, par value $0.0001 per share, were outstanding.

PRIMORIS SERVICES CORPORATION

INDEX

PART I.  FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

PRIMORIS SERVICES CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(In Thousands, Except Share Amounts)

(Unaudited)

See Accompanying Notes to Condensed Consolidated Financial Statements

PRIMORIS SERVICES CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In Thousands, Except Per Share Amounts)

(Unaudited)

See Accompanying Notes to Condensed Consolidated Financial Statements

PRIMORIS SERVICES CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In Thousands, Except Per Share Amounts)

(Unaudited)

See Accompanying Notes to Condensed Consolidated Financial Statements

PRIMORIS SERVICES CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In Thousands)

(Unaudited)

See Accompanying Notes to Condensed Consolidated Financial Statements

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES

See Accompanying Notes to Condensed Consolidated Financial Statements

PRIMORIS SERVICES CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars In Thousands, Except Share and Per Share Amounts)

(Unaudited)

Note 1—Nature of Business

Organization and operations — Primoris Services Corporation is a holding company of various construction and product engineering subsidiaries. Our underground and directional drilling operations install, replace and repair natural gas, petroleum, telecommunications and water pipeline systems, including large diameter pipeline systems. Our industrial, civil and engineering operations build and provide maintenance services to industrial facilities including power plants, petrochemical facilities, and other processing plants; construct multi-level parking structures; and engage in the construction of highways, bridges and other environmental construction activities. Our transmission and distribution operations install, replace and repair gas and electric utility systems. We are incorporated in the state of Delaware, and our corporate headquarters are located at 2100 McKinney Avenue, Suite 1500, Dallas, Texas 75201. Unless specifically noted otherwise, as used throughout these condensed consolidated financial statements, “Primoris”, “the Company”, “we”, “our”, “us” or “its” refers to the business, operations and financial results of us and our wholly-owned subsidiaries.

Reportable Segments — We segregate our business into five reportable segments: the Power, Industrial and Engineering (“Power”) segment, the Pipeline and Underground (“Pipeline”) segment, the Utilities and Distribution (“Utilities”) segment, the Transmission and Distribution (“Transmission”) segment, which is a new reportable segment created in connection with the acquisition of Willbros Group, Inc. (“Willbros”), and the Civil segment.  See Note 17 – “Reportable Segments” for a brief description of the reportable segments and their operations.

The classification of revenue and gross profit for segment reporting purposes can at times require judgment on the part of management. Our segments may perform services across industries or perform joint services for customers in multiple industries. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs and indirect operating expenses were made.

Acquisition of Willbros Group, Inc. — On June 1, 2018, we completed our acquisition of Willbros for approximately $111.0 million, net of cash and restricted cash acquired. Willbros is a specialty energy infrastructure contractor serving the oil and gas and power industries through its utility transmission and distribution, oil and gas, and Canadian operations, which principally executes industrial and power projects. The utility transmission and distribution operations are included in the Transmission segment, the oil and gas operations are included in the Pipeline segment, and the Canadian operations are included in the Power segment. See Note 6— “Business Combinations”.

Other Acquisitions —  On May 26, 2017, we acquired the net assets of Florida Gas Contractors (“FGC”) for $37.7 million; on May 30, 2017, we acquired certain engineering assets for approximately $2.3 million; and on June 16, 2017, we acquired the net assets of Coastal Field Services (“Coastal”) for $27.5 million.  FGC operations are included in the Utilities segment, the engineering assets are included in the operations of the Power segment, and Coastal operations are included in the Pipeline segment.  See Note 6— “Business Combinations”.

Joint Ventures —We own a 50% interest in two separate joint ventures, both formed in 2015.  The Carlsbad Power Constructors joint venture (“Carlsbad”) is engineering and constructing a gas-fired power generation facility, and the ARB Inc. & B&M Engineering Co. joint venture (“Wilmington”) is also engineering and constructing a gas-fired power generation facility.  Both projects are located in Southern California.  The joint venture operations are included as part of the Power segment.  As a result of determining that we are the primary beneficiary of the two variable interest entities ("VIEs”), the results of the Carlsbad and Wilmington joint ventures are consolidated in our financial statements.  The Wilmington project was substantially complete as of December 31, 2017, and the Carlsbad project is expected to be completed in 2018.  Financial information for the joint ventures is presented in Note 10 – “Noncontrolling Interests”.

Note 2—Basis of Presentation

Interim consolidated financial statements — The interim condensed consolidated financial statements for the three and six month periods ended June 30, 2018 and 2017 have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As such, certain disclosures, which would substantially duplicate the disclosures contained in our Annual Report on Form 10-K, filed on

February 26, 2018, which contains our audited consolidated financial statements for the year ended December 31, 2017, have been omitted. 

This Second Quarter 2018 Report on Form 10-Q should be read in concert with our most recent Annual Report on Form 10-K. The interim financial information is unaudited.  In the opinion of management, the interim information includes all adjustments (consisting of normal recurring adjustments) necessary for the fair presentation of the interim financial information. 

Reclassification — Certain previously reported amounts have been reclassified to conform to the current year presentation.

Restricted cash — Restricted cash consists of cash balances that are restricted as to withdrawal or usage. As a result of the Willbros acquisition, we acquired cash pledged to secure letters of credit, which is recorded as restricted cash at June 30, 2018. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets to the totals of such amounts shown in the Condensed Consolidated Statements of Cash Flows (in thousands).

Customer concentration — We operate in multiple industry segments encompassing the construction of commercial, industrial and public works infrastructure assets primarily throughout the United States. Typically, the top ten customers in any one calendar year generate revenue in excess of 50% of total revenue; however, the group that comprises the top ten customers varies from year to year.

During the three and six months ended June 30, 2018, revenue generated by the top ten customers were approximately $322.6 million and $581.6 million, respectively, which represented 50.4% and 49.7%, respectively, of total revenue during the applicable period. During the three and six months ended June 30, 2018, a state department of transportation customer represented 9.4% and 9.3% of total revenue, respectively, and a California utility customer represented 8.7% and 9.0% of total revenue, respectively.

During the three and six months ended June 30, 2017, revenues generated by the top ten customers were approximately $330.2 million and $713.5 million, respectively, which represented 52.3% and 59.8%, respectively, of total revenues during the applicable period. During the three and six months ended June 30, 2017, two large pipeline projects represented 11.0% and 19.2% of total revenues, respectively and a state department of transportation customer represented 10.6% and 10.5% of total revenues, respectively.

At June 30, 2018, approximately 6.5% of our accounts receivable were due from one customer, and that customer provided 8.8% our revenue for the six months ended June 30, 2018. In addition, of total accounts receivable, approximately 5.1% are from one customer with whom we are currently engaged in a dispute resolution. See Note 16 – “Commitments and Contingencies”.

At June 30, 2017, approximately 11.7% of our accounts receivable were due from one customer, and that customer provided 8.8% of our revenue for the six months ended June 30, 2017. In addition, approximately 11.0% of total accounts receivable at June 30, 2017 were from one customer with whom we are currently engaged in a dispute resolution.

Multiemployer plans — Various of our subsidiaries are signatories to collective bargaining agreements. These agreements require that we participate in and contribute to a number of multiemployer benefit plans for our union employees at rates determined by the agreements. The trustees for each multiemployer plan determine the eligibility and allocations of contributions and benefit amounts, determine the types of benefits, and administer the plan. To the extent that any plans are underfunded, the Employee Retirement Income Security Act of 1974, as amended by the Multi-Employer Pension Plan Amendments Act of 1980, requires that if we were to withdraw from an agreement or if a plan is terminated, we may incur a withdrawal obligation. The potential withdrawal obligation may be significant. In accordance

with Generally Accepted Accounting Principles (“GAAP”), any withdrawal liability would be recorded when it is probable that a liability exists and can be reasonably estimated. In November 2011, we withdrew from the Central States Southeast and Southwest Areas Pension Fund multiemployer plan, as discussed in Note 16 — “Commitments and Contingencies”. We have no plans to withdraw from any other agreements.

.

Note 3—Recent Accounting Pronouncements

Recently adopted accounting pronouncements

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, with several clarifying updates issued during 2016 and 2017. The new standard is effective for reporting periods beginning after December 15, 2017 and supersedes all prior revenue recognition standards including the guidance in ASC Topic 605, “Revenue Recognition”.  Under Topic 606, revenue recognition occurs when promised goods or services are transferred to customers in amounts that reflect the consideration to which the company expects to be entitled to in exchange for those goods or services. We adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method. See Note 4 — “Revenue” for further details.

In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230)”, which requires a reporting entity to include restricted cash and restricted cash equivalents in its cash and cash-equivalent balances presented in the entity’s statement of cash flows. A reconciliation between the statement of financial position and the statement of cash flows must be disclosed when the balance sheet includes more than one line item for cash, cash equivalents, restricted cash and restricted cash equivalents. Transfers between non-restricted and restricted cash should not be presented as cash flow activities in the statement of cash flows. Furthermore, an entity with a material restricted cash balance must disclose information regarding the nature of the restrictions. ASU 2016-18 is effective for annual periods beginning after December 15, 2017, including interim periods within those annual reporting periods. We adopted the ASU as of January 1, 2018. See our Condensed Consolidated Statements of Cash Flows for more information.

In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business", which changes the definition of a business to assist entities with evaluating when a set of acquired assets and activities is a business. ASU 2017-01 requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities is not a business. ASU 2017-01 is effective for interim and annual reporting periods beginning after December 15, 2017. We adopted the ASU as of January 1, 2018, and it did not impact the determination of our business combinations.

In May 2017, the FASB issued ASU 2017-09, “Compensation — Stock Compensation (Topic 718) — Scope of Modification Accounting”.  The ASU amends the scope of modification accounting for share-based payment arrangements.  The amendments in the ASU clarify when to account for a change in the terms or conditions of share-based payment awards as a modification under ASC 718, “Compensation — Stock Compensation”.  The ASU is effective for interim and annual reporting periods beginning after December 15, 2017.  We adopted the ASU as of January 1, 2018, and it did not have a material impact on our consolidated financial statements.

In March 2018, the FASB issued ASU No. 2018-05, “Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118”, to add various language issued by the Securities and Exchange Commission (“SEC”) in Staff Accounting Bulletin No. 118 (“SAB 118”) to ASC 740 “Income Taxes”.  SAB 118 was issued by the SEC in December 2017 to provide immediate guidance for accounting implications of U.S. tax reform under the Tax Cuts and Jobs Act (the “Tax Act”), which became effective for us on January 1, 2018. We have evaluated the potential impacts of SAB 118 and have applied this guidance to our consolidated financial statements and related disclosures beginning in the fourth quarter of our fiscal year 2017. See Note 13 — “Income Taxes” for additional information on SAB 118 and the impacts of the Tax Act.

Recently issued accounting pronouncements not yet adopted

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”. In July 2018, the FASB issued two updates to ASU 2016-02, ASU 2018-10, “Codification Improvements to Topic 842, Leases”, and ASU 2018-11, “Leases (Topic 842): Targeted Improvements”. ASU 2016-02 will require recognition of operating leases with lease terms of more than twelve months on the balance sheet as both assets for the rights and liabilities for the obligations created by the leases. The ASU will require disclosures that provide qualitative and quantitative information for the lease

assets and liabilities recorded in the financial statements. The standard is effective for fiscal years beginning after December 15, 2018, and initially required a modified restrospective transition method where a company applies the new leases standard at the beginning of the earliest period presented in the financial statements. ASU 2018-11 added an optional transition method where a company applies the new leases standard at the adoption date and recognizes a cumulative effect adjustment to the opening balance of retained earnings. We have already revised our credit agreements to address the impact of ASU 2016-02 and continue to assess the effect the guidance will have on our existing accounting policies and consolidated financial statements. We expect there will be an increase in assets and liabilities on the Consolidated Balance Sheets at adoption due to the recording of right-of-use assets and corresponding lease liabilities. We are currently in the process of inventorying all lease obligations and associated right-of-use assets. We have also engaged a third party to assist us in the process, but have not yet determined the impact to our consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, "Simplifying the Test for Goodwill Impairment". ASU 2017-04 removes the second step of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for interim and annual reporting periods beginning after December 15, 2019 and will be applied prospectively. We do not expect the adoption of ASU 2017-04 to have an impact on our financial position, results of operations or cash flows.

Note 4—Revenue

On January 1, 2018, we adopted Topic 606 using the modified retrospective method applied to those contracts that were not completed as of January 1, 2018. Adoption changed our accounting policy for revenue recognition. Results for periods prior to January 1, 2018 are not adjusted and continue to be reported in accordance with our historic accounting under ASC Topic 605. The cumulative impact of adopting Topic 606 was immaterial and did not require an adjustment to retained earnings. However, we have reclassified prior year balance sheet and cash flow amounts to conform to current year presentation.

We generate revenue under a range of contracting types, including fixed-price, unit-price, time and material, and cost reimbursable plus fee contracts. A substantial portion of our revenue is derived from contracts that are fixed-price or unit-price and is recognized over time as work is completed because of the continuous transfer of control to the customer (typically using an input measure such as costs incurred to date relative to total estimated costs at completion to measure progress). For time and material and cost reimbursable plus fee contracts, revenue is recognized primarily on an input basis, based on contract costs incurred as defined within the respective contracts. Costs to obtain contracts are generally not significant and are expensed in the period incurred.

We evaluate whether two or more contracts should be combined and accounted for as one single performance obligation and whether a single contract should be accounted for as more than one performance obligation. Topic 606 defines a performance obligation as a contractual promise to transfer a distinct good or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. Our evaluation requires significant judgment and the decision to combine a group of contracts or separate a contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. The majority of our contracts have a single performance obligation, as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contract and, therefore, is not distinct. However, occasionally we have contracts with multiple performance obligations. For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using the observable standalone selling price, if available, or alternatively our best estimate of the standalone selling price of each distinct performance obligation in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach for each performance obligation. 

As of June 30, 2018, we had $1.85 billion of remaining performance obligations. We expect to recognize approximately 84% of our remaining performance obligations as revenue during the next four quarters and the remaining balance thereafter.

Accounting for long-term contracts involves the use of various techniques to estimate total transaction price and costs. For long-term contracts, transaction price, estimated cost at completion and total costs incurred to date are used to calculate revenue earned. Unforeseen events and circumstances can alter the estimate of the costs and potential profit

associated with a particular contract.  Total estimated costs, and thus contract revenue and income, can be impacted by changes in productivity, scheduling, the unit cost of labor, subcontracts, materials and equipment. Additionally, external factors such as weather, client needs, client delays in providing permits and approvals, labor availability, governmental regulation and politics may affect the progress of a project’s completion, and thus the timing of revenue recognition. To the extent that original cost estimates are modified, estimated costs to complete increase, delivery schedules are delayed, or progress under a contract is otherwise impeded, cash flow, revenue recognition and profitability from a particular contract may be adversely affected.

The nature of our contracts gives rise to several types of variable consideration, including contract modifications (change orders and claims), liquidated damages, volume discounts, performance bonuses, incentive fees, and other terms that can either increase or decrease the transaction price. We estimate variable consideration as the most likely amount to which we expect to be entitled. We include estimated amounts in the transaction price to the extent we believe we have an enforceable right and it is probable that a significant reversal of cumulative revenue recognized will not occur. Our estimates of variable consideration and the determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us.

Contract modifications result from changes in contract specifications or requirements. We consider unapproved change orders to be contract modifications for which customers have not agreed to both scope and price. We consider claims to be contract modifications for which we seek, or will seek, to collect from customers, or others, for customer-caused changes in contract specifications or design, or other customer-related causes of unanticipated additional contract costs on which there is no agreement with customers. Claims can also be caused by non-customer-caused changes, such as rain or other weather delays. Costs associated with contract modifications are included in the estimated costs to complete the contracts and are treated as project costs when incurred. In most instances, contract modifications are for goods or services that are not distinct, and, therefore, are accounted for as part of the existing contract. The effect of a contract modification on the transaction price, and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue on a cumulative catch-up basis. In some cases, settlement of contract modifications may not occur until after completion of work under the contract.

As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the cumulative impact of the profit adjustment is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. In the three and six months ended June 30, 2018, revenue recognized from performance obligations satisfied in previous periods was $3.7 million and $25.0 million, respectively. If at any time the estimate of contract profitability indicates an anticipated loss on a contract, the projected loss is recognized in full in the period it is identified and recognized as an “accrued loss provision” which is included in “Contract liabilities” on the Condensed Consolidated Balance Sheets. For contract revenue recognized over time, the accrued loss provision is adjusted so that the gross profit for the contract remains zero in future periods.

At June 30, 2018, we had approximately $85.3 million of unapproved contract modifications included in the aggregate transaction prices. These contract modifications were in the process of being negotiated in the normal course of business. Approximately $77.1 million of the contract modifications had been recognized as revenue on a cumulative catch-up basis through June 30, 2018.

In all forms of contracts, we estimate the collectability of contract amounts at the same time that we estimate project costs.  If we anticipate that there may be issues associated with the collectability of the full amount calculated as the transaction price, we may reduce the amount recognized as revenue to reflect the uncertainty associated with realization of the eventual cash collection. For example, when a cost reimbursable project exceeds the client’s expected budget amount, the client frequently requests an adjustment to the final amount. Similarly, some utility clients reserve the right to audit costs for significant periods after performance of the work.

The timing of when we bill our customers is generally dependent upon agreed-upon contractual terms, milestone billings based on the completion of certain phases of the work, or when services are provided. Sometimes, billing occurs subsequent to revenue recognition, resulting in unbilled revenue, which is a contract asset. Also, we sometimes receive advances or deposits from our customers before revenue is recognized, resulting in deferred revenue, which is a contract liability.

The caption “Contract assets” in the Condensed Consolidated Balance Sheets represents the following:

Contract assets consist of the following (in thousands):

Contract assets increased by $94.8 million compared to December 31, 2017 due primarily to a $30.8 million increase from the acquisition of Willbros in the second quarter of 2018 and higher unbilled revenue.

The caption “Contract liabilities” in the Condensed Consolidated Balance Sheets represents deferred revenue (formerly billings in excess of costs and estimated earnings) on billings in excess of contract revenue recognized to date, and the accrued loss provision.

Contract liabilities consist of the following (in thousands):

Contract liabilities increased by $25.9 million compared to December 31, 2017 primarily due to a $44.3 million increase from the acquisition of Willbros in the second quarter of 2018, partially offset by lower deferred revenue.

Revenue recognized for the six months ended June 30, 2018, that was included in the contract liability balance at the beginning of the year was approximately $132.7 million.

The following tables present our revenue disaggregated into various categories.

Master Service Agreements (“MSA”) and Non-MSA revenue was as follows (in thousands):

Revenue by contract type was as follows (in thousands):

Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. Unforeseen events and circumstances can alter the estimate of the costs and potential profit associated with a particular contract. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Unit-price and cost reimbursable contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under these contracts, our profit may vary if actual costs vary significantly from the negotiated rates.

Note 5—Fair Value Measurements

ASC Topic 820, “Fair Value Measurements and Disclosures”, defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements.  ASC Topic 820 addresses fair value GAAP for financial assets and financial liabilities that are re-measured and reported at fair value at each reporting period and for non-financial assets and liabilities that are re-measured and reported at fair value on a non-recurring basis.

In general, fair values determined by Level 1 inputs use quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair values determined by Level 2 inputs use data points that are observable such as quoted prices, interest rates and yield curves. Fair values determined by Level 3 inputs are “unobservable data points” for the asset or liability and include situations where there is little, if any, market activity for the asset or liability.

The following table presents, for each of the fair value hierarchy levels identified under ASC Topic 820, our financial assets and liabilities that are required to be measured at fair value at June 30, 2018 and December 31, 2017 (in thousands):

Other financial instruments not listed in the table consist of accounts receivable, accounts payable and certain accrued liabilities.  These financial instruments generally approximate fair value based on their short-term nature.  The carrying value of our long-term debt approximates fair value based on comparison with current prevailing market rates for loans of similar risks and maturities. 

The following table provides changes to our contingent consideration liability Level 3 fair value measurements during the six months ended June 30, 2018 (in thousands):

On a quarterly basis, we assess the estimated fair value of the contractual obligation to pay the contingent consideration and any changes in estimated fair value are recorded as a non-operating charge in our Statement of Income.  Fluctuations in the fair value of contingent consideration are impacted by two unobservable inputs, management’s estimate of the probability (which has ranged from 33% to 100%) of the acquired company meeting the contractual operating performance target and the estimated discount rate (a rate that approximates our cost of capital). Significant changes in either of those inputs in isolation would result in a different fair value measurement.  Generally, a change in the assumption of the probability of meeting the performance target is accompanied by a directionally similar change in the fair value of contingent consideration liability, whereas a change in assumption of the estimated discount rate is accompanied by a directionally opposite change in the fair value of contingent consideration liability. Upon meeting the target, we reflect the full liability on the balance sheet and record a charge to “Other income (expense), net” for the change in the fair value of the liability from the prior period.

The May 2017 acquisition of FGC included an earnout of $1.5 million, contingent upon meeting certain performance targets.  The estimated fair value of the contingent consideration on the acquisition date was $1.2 million.  Under ASC 805, we are required to estimate the fair value of contingent consideration based on facts and circumstances that existed as of the acquisition date and remeasure to fair value at each reporting date until the contingency is resolved.  As a result of that remeasurement,  we increased the fair value of the contingent consideration in the second quarter of 2018 related to the FGC performance target contemplated in their purchase agreement, and increased the liability by $0.8 million with a corresponding increase in non-operating expense. We expect to pay the full $1.5 million liability in the third quarter of 2018.

Note 6 — Business Combinations

2018 Acquisition

Acquisition of Willbros Group, Inc.

On June 1, 2018, we acquired all of the outstanding common stock of Willbros, a specialty energy infrastructure contractor serving the oil and gas and power industries for approximately $111.0 million, net of cash and restricted cash acquired. The total purchase price was funded through a combination of existing cash balances and borrowings under our revolving credit facility.

The tables below represent the purchase consideration and preliminary estimated fair values of the assets acquired and liabilities assumed. The final determination of fair value for certain assets and liabilities will be completed as soon as the information necessary to complete the analysis is obtained. These amounts, which may differ materially from these preliminary estimates, will continue to be refined and will be finalized as soon as possible, but no later than one year from the acquisition date. The primary areas of the preliminary estimates that are not yet finalized relate to property, plant and equipment, identifiable intangible assets, contract assets and liabilities, deferred income taxes, uncertain tax positions, and the fair value of certain contractual obligations.