10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-K

☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2020

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: 1-6314

Tutor Perini Corporation

(Exact name of registrant as specified in its charter)
Massachusetts	04-1717070
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
15901 Olden Street, Sylmar, California	91342
(Address of principal executive offices)	(Zip Code)
(818) 362-8391
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $1.00 par value	TPC	The New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐  No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No  ☒

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 every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit 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.

Large accelerated filer o	Accelerated filer ☒	Non-accelerated filer o
Smaller reporting company ☐	Emerging growth company ☐

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.  o

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

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

The aggregate market value of voting Common Stock held by non-affiliates of the registrant was $490,456,469 as of June 30, 2020, the last business day of the registrant’s most recently completed second fiscal quarter.

The number of shares of Common Stock, $1.00 par value per share, outstanding at February 19, 2021 was 50,913,900.

Documents Incorporated by Reference

The information required by Part III of this Annual Report on Form 10-K, to the extent not set forth herein, is incorporated herein by reference to the registrant’s definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2021, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates.

TUTOR PERINI CORPORATION

2020 ANNUAL REPORT ON FORM 10-K

TABLE OF CONTENTS

		PAGE
PART I.
Item 1.	Business	3
Item 1A.	Risk Factors	10
Item 1B.	Unresolved Staff Comments	16
Item 2.	Properties	16
Item 3.	Legal Proceedings	16
Item 4.	Mine Safety Disclosures	16
PART II.
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	16
Item 6.	Selected Financial Data	18
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	19
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	31
Item 8.	Financial Statements and Supplementary Data	31
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	31
Item 9A.	Controls and Procedures	31
Item 9B.	Other Information	34
PART III.
Item 10.	Directors, Executive Officers and Corporate Governance	34
Item 11.	Executive Compensation	34
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	34
Item 13.	Certain Relationships and Related Transactions, and Director Independence	34
Item 14.	Principal Accountant Fees and Services	34
PART IV.
Item 15.	Exhibits and Financial Statement Schedules	34
Item 16.	Form 10-K Summary	37
	Signatures	38

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PART I.

Forward-Looking Statements

The statements contained in this Annual Report on Form 10-K that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), including without limitation, statements regarding our management’s expectations, hopes, beliefs, intentions or strategies regarding the future and statements regarding future guidance or estimates and non-historical performance. These forward-looking statements are based on our current expectations and beliefs concerning future developments and their potential effects on us. Our expectations, beliefs and projections are expressed in good faith, and we believe there is a reasonable basis for them. There can be no assurance that future developments affecting us will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by such forward-looking statements. These material risks and uncertainties are listed and discussed in Item 1A. Risk Factors, below. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

ITEM 1. BUSINESS

General

Tutor Perini Corporation (together with its consolidated subsidiaries, “Tutor Perini,” the “Company,” “we,” “us,” and “our,” unless the context indicates otherwise) is a leading construction company, based on revenue as ranked by Engineering News-Record (“ENR”), offering diversified general contracting, construction management and design-build services to private customers and public agencies throughout the world. The Company was formed as a result of the 2008 merger between Tutor-Saliba Corporation and Perini Corporation (“Perini”) and our legacy dates back to 1894, when Perini's predecessor businesses began providing construction services. Our corporate headquarters are in Los Angeles (Sylmar), California, and we have various other principal offices throughout the United States and its territories (see Item 2. Properties for a listing of our major facilities). Our common stock is listed on the New York Stock Exchange under the symbol “TPC.” We are incorporated in the Commonwealth of Massachusetts.

We have established a strong reputation within our markets for executing large, complex projects on time and within budget while adhering to strict quality control measures. We offer general contracting, pre-construction planning and comprehensive project management services, including the planning and scheduling of the manpower, equipment, materials and subcontractors required for a project. We also offer self-performed construction services including site work; concrete forming and placement; steel erection; electrical; mechanical; plumbing; heating, ventilation and air conditioning (HVAC); and fire protection. During 2020, we performed work on approximately 1,200 construction projects.

In 2020, ENR ranked Tutor Perini as the 14th largest domestic contractor. We are recognized as one of the leading civil contractors in the United States, as evidenced by our performance on several of the country’s largest mass-transit and transportation projects, such as Newark Liberty International Airport Terminal One (“Newark Airport Terminal One”), the East Side Access project in New York City, the California High-Speed Rail System, the Alaskan Way Viaduct Replacement (SR 99) project in Seattle, major portions of the Red Line and Purple Line segments of the Los Angeles Metro subway system, and the San Francisco Central Subway extension to Chinatown. We are also recognized as one of the leading building contractors in the United States, as evidenced by our performance on several of the country’s largest building development projects, including CityCenter and the Cosmopolitan Resort and Casino in Las Vegas, and Hudson Yards in New York City.

Our strengths and expertise in the construction of civil and building infrastructure projects have been augmented by our vertical integration capabilities, which we established more than 10 years ago through the acquisitions of various business entities specializing in electrical, mechanical, plumbing, HVAC and other services that enhanced our market capabilities and expanded our geographic presence. Our vertical integration is a competitive advantage that allows us to self-perform a greater amount of work than our competitors. It also increases our competitiveness in bidding and our efficiency in managing and executing large, complex projects, and provides us with significant cross-selling opportunities across a broad geographic footprint.

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Business Segment Overview

Our business is conducted through three segments: Civil, Building and Specialty Contractors.

Civil Segment

Our Civil segment specializes in public works construction and the replacement and reconstruction of infrastructure across several major geographic regions of the United States. Our civil contracting services include construction and rehabilitation of highways, bridges, tunnels, mass-transit systems, military defense facilities, and water management and wastewater treatment facilities.

The Civil segment is comprised of the heavy civil construction operations of our predecessors, Tutor-Saliba Corporation, its subsidiary Black Construction, and Perini, as well as our acquired companies, Frontier-Kemper, Lunda Construction and Becho. Our heavy civil units operate primarily on the West and East Coasts of the United States and are engaged in a variety of large mass-transit, tunneling, bridge and highway projects. Black Construction is the largest contractor in Guam and provides a variety of heavy civil, building, mechanical and electrical construction services throughout the Western Pacific region and in other strategic military locations. Frontier-Kemper is a heavy civil contractor engaged in the construction of tunnels for highways, railroads, subways and rapid transit systems; the construction of shafts and other facilities for water supply, wastewater transport and hydroelectric projects; and the development and equipping of mines with innovative hoisting, elevator and vertical conveyance systems. Lunda Construction is a heavy civil contractor specializing in the construction, rehabilitation and maintenance of bridges, railroads and other civil structures throughout the United States. Becho is engaged in drilling, foundation and excavation support for shoring, bridges, piers, roads and highway projects, primarily in the southwestern United States.

In its 2020 rankings, ENR ranked us as the nation’s second largest contractor in the transportation market and third largest domestic heavy contractor.

Our Civil segment’s customers primarily award contracts through one of two methods: the traditional public “competitive bid” method, in which price is the major determining factor, or through a best value proposal, where contracts are awarded based on a combination of technical qualifications, proposed project team, schedule, past performance on similar projects and price.

Traditionally, our Civil segment’s customers require each contractor to pre-qualify for construction business by meeting criteria that include technical capabilities and financial strength. Our financial strength, outstanding record of performance on challenging civil works projects, and vertical integration capabilities often enable us to pre-qualify for projects in situations where smaller, less diversified contractors are unable to meet the qualification requirements. We believe this is a competitive advantage that allows us to self-perform a greater amount of work and makes us an ideal lead contractor for the largest, most complex infrastructure projects and on prestigious design-build, design-build-operate-maintain and public-private partnership projects.

We believe the Civil segment provides us with significant opportunities for growth due to the condition of existing infrastructure coupled with large government funding sources dedicated to the replacement and reconstruction of aging U.S. infrastructure. In addition, infrastructure programs generally garner popular, bipartisan support from the public and elected officials due to their favorable long-term economic impacts, including significant job creation. Funding for major civil infrastructure projects is typically provided through a combination of one or more of the following: local, regional, state and federal loans and grants; other direct allocations sourced through tax revenue; bonds; user fees; and, for certain projects, private capital.

We have been active in civil construction since 1894 and believe we have a particular expertise in large, complex civil construction projects. We have completed, or are currently working on, some of the most significant civil construction projects in the United States. For example, we are currently working on Newark Airport Terminal One, the East Side Access project in New York City, the first phase of the California High-Speed Rail project, the Purple Line Segments 2 and 3 expansion projects in Los Angeles, the San Francisco Central Subway extension to Chinatown and the Minneapolis Southwest Light Rail Transit project. We have also completed major projects such as the Alaskan Way Viaduct Replacement (SR 99) in Seattle; the platform over the eastern rail yard at Hudson Yards in New York City; the rehabilitation of the Verrazano-Narrows Bridge in New York; and multiple runway reconstruction projects at the John F. Kennedy International Airport in New York, Los Angeles International Airport and Fort Lauderdale-Hollywood International Airport, among others.

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Building Segment

Our Building segment has significant experience providing services to a number of specialized building markets for private and public works customers, including hospitality and gaming, transportation, health care, commercial offices, government facilities, sports and entertainment, education, correctional facilities, biotech, pharmaceutical, industrial and high-tech. We believe the success of the Building segment results from our proven ability to manage and perform large, complex projects with aggressive fast-track schedules, elaborate designs, and advanced mechanical, electrical and life safety systems, while providing accurate budgeting and strict quality control. Although price is a key competitive factor, we believe our strong reputation, long-standing customer relationships and significant level of repeat and referral business have enabled us to achieve a leading position in the marketplace.

In its 2020 rankings, ENR ranked us as the 19th largest domestic building contractor. We are a recognized leader in the hospitality and gaming market, specializing in the construction of high-end resorts and casinos. We work with hotel operators, Native American tribal councils, developers and architectural firms to provide diversified construction services to meet the challenges of new construction and renovation of hotel and resort properties. We believe that our reputation for completing projects on time is a significant competitive advantage in this market, as any delay in project completion could result in significant loss of revenue for the customer.

The Building segment is comprised of several operating units that provide general contracting, design-build, preconstruction and construction services in various regions of the United States. Tutor Perini Building Corp. focuses on large, complex building projects nationwide, including significant projects in the hospitality and gaming, commercial office, education, government facilities, and multi-unit residential markets. Rudolph and Sletten focuses on large, complex projects in California in the health care, commercial office, technology, industrial, education, and government facilities markets. Roy Anderson Corp. provides general contracting services, including major disaster response and reconstruction support, to public and private customers primarily throughout the southeastern United States. Perini Management Services provides diversified construction and design-build services internationally to U.S. government agencies, as well as to surety companies and multi-national corporations.

We have recently completed, or are currently working on, various large private and public building projects across a wide array of end markets. Specific projects include Newark Airport Terminal One; three large corporate office buildings in northern California for distinct confidential technology customers; a commercial office tower at 10 Hudson Yards and a multi-unit residential tower at 15 Hudson Yards in New York City; the El Camino Hospital Integrated Medical Office Building in El Camino, California; Kaiser Hospital buildings in San Leandro, Redwood City and Roseville, California; the Choctaw Casino and Resort in Durant, Oklahoma; the Pechanga Resort and Casino expansion in Temecula, California; the O Street Government Office Building in Sacramento, California; and courthouses in San Bernardino and San Diego, California and Broward County, Florida. As a result of our reputation and track record, we were previously awarded and completed contracts for several marquee hospitality and gaming projects in Las Vegas, including CityCenter, the Cosmopolitan Resort and Casino and the Wynn Encore Hotel. These projects span a wide array of building end markets and illustrate our Building segment’s résumé of successfully completed large-scale public and private projects.

Specialty Contractors Segment

Our Specialty Contractors segment specializes in electrical, mechanical, plumbing, HVAC, fire protection systems and pneumatically placed concrete for a full range of civil and building construction projects in the industrial, commercial, hospitality and gaming, and mass-transit end markets. This segment provides unique strengths and vertically integrated service capabilities that position us as a full-service contractor with greater control over project bids and costs, scheduled work, project delivery and risk management. The majority of work performed by the Specialty Contractors segment is contracted directly with state and local municipal agencies, real estate developers, school districts and other commercial and industrial customers. A significant portion of the segment's work has been, and is expected to continue to be, performed for our Civil and Building segments.

The Specialty Contractors segment is comprised of several operating units that provide unique services in various regions of the United States. Five Star Electric has established itself as an industry leader and is one of the largest electrical contractors in New York City. Five Star Electric provides construction services, including power, lighting, fire alarm, security, telecommunications, low voltage and wireless systems to both the public and private sectors. These services are provided across end markets that include multi-unit residential, hotels, commercial offices, industrial, mass transit, education, retail, sports and entertainment, health care and water treatment. Fisk Electric (“Fisk”) covers many of the major commercial, transportation and industrial electrical construction markets in California and the southern United States, with the ability to cover other attractive markets nationwide. Fisk’s expertise is in the design and development of electrical and technology systems for major projects spanning a broad variety of project types, including commercial office buildings, sports arenas, hospitals, research laboratories,

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hotels and casinos, convention centers, manufacturing plants, refineries, and water and wastewater treatment facilities. WDF, Nagelbush and Desert Mechanical each provide mechanical, plumbing, HVAC and fire protection services to a range of customers in a wide variety of markets, including transportation, commercial/industrial, schools and universities and residential. WDF is one of the largest mechanical contractors serving the New York City metropolitan region. Nagelbush operates primarily in Florida and Desert Mechanical operates primarily in the western United States. Superior Gunite specializes in pneumatically placed structural concrete utilized in infrastructure projects nationwide, such as bridges, dams, tunnels and retaining walls.

Our Specialty Contractors business units have completed, or are currently working on, various portions of the East Side Access project in New York City, various projects at the World Trade Center and at Hudson Yards in New York City, and upgrades and rehabilitations at various New York City public housing facilities. The Specialty Contractors segment has also supported, or is currently supporting, several large projects in our Civil and Building segments, including the Alaskan Way Viaduct Replacement (SR 99) project in Seattle; the San Francisco Central Subway extension to Chinatown; the Purple Line Segments 2 and 3 expansion projects in Los Angeles; Newark Airport Terminal One; the California High Speed Rail project in central California; McCarran International Airport Terminal 3 in Las Vegas; and several marquee hospitality and gaming projects in Las Vegas, including CityCenter, the Cosmopolitan Resort and Casino, and the Wynn Encore Hotel.

For information regarding the breakdown of our revenue by segment, end market, customer type and contract type, see Note 3 of the Notes to Consolidated Financial Statements. In addition, financial information about geographic areas is discussed in Note 14 of the Notes to Consolidated Financial Statements.

Backlog

Backlog in our industry is a measure of the total value of work that is remaining to be performed on projects that have been awarded. We include a construction project in our backlog when a contract is awarded or when we have otherwise received written definitive notice that the project has been awarded to us and there are no remaining major uncertainties that the project will proceed (e.g., adequate funding is in place). As a result, we believe our backlog is firm, and although cancellations or scope adjustments may occur, historically they have not been material. We estimate that approximately $4 billion, or 47%, of our backlog as of December 31, 2020 will be recognized as revenue in 2021. Our backlog by segment, end market and customer type is presented in the following tables:

	As of December 31,
(in thousands)	2020				2019
Backlog by business segment:
Civil	$	4,783,564	57	%	$	6,037,195	54	%
Building	1,702,305		20	%	2,790,289		25	%
Specialty Contractors	1,859,848		23	%	2,393,626		21	%
Total backlog	$	8,345,717	100	%	$	11,221,110	100	%

	As of December 31,
(in thousands)	2020				2019
Civil segment backlog by end market:
Mass transit (includes certain transportation and tunneling projects)	$	3,885,275	81	%	$	4,628,664	77	%
Military defense facilities	318,389		7	%	369,647		6	%
Bridges	244,385		5	%	364,992		6	%
Water	130,274		3	%	218,517		4	%
Other	205,241		4	%	455,375		7	%
Total Civil segment backlog	$	4,783,564	100	%	$	6,037,195	100	%

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	As of December 31,
(in thousands)	2020				2019
Building segment backlog by end market:
Municipal and government	$	556,726	33	%	$	584,444	21	%
Commercial and industrial facilities	350,012		21	%	578,852		21	%
Hospitality and gaming	333,315		20	%	793,624		28	%
Education facilities	165,766		10	%	233,551		8	%
Mass transit (includes transportation projects)	144,019		8	%	345,462		12	%
Health care facilities	49,655		3	%	92,913		3	%
Other	102,812		5	%	161,443		7	%
Total Building segment backlog	$	1,702,305	100	%	$	2,790,289	100	%

	As of December 31,
(in thousands)	2020				2019
Specialty Contractors segment backlog by end market:
Mass transit (includes certain transportation and tunneling projects)	$	1,058,479	57	%	$	1,406,047	59	%
Multi-unit residential	219,139		12	%	307,009		13	%
Water	214,717		12	%	278,788		12	%
Commercial and industrial facilities	122,687		7	%	163,921		7	%
Other	244,826		12	%	237,861		9	%
Total Specialty Contractors segment backlog	$	1,859,848	100	%	$	2,393,626	100	%

	As of December 31,
	2020		2019
Backlog by customer type:
State and local agencies	72	%	69	%
Private owners	20	%	25	%
Federal agencies	8	%	6	%
Total backlog	100	%	100	%

Fixed price contracts are expected to continue to represent a sizeable percentage of total backlog. The composition of backlog by type of contract for 2020 and 2019 is as follows:

	As of December 31,
	2020		2019
Backlog by contract type:
Fixed price	76	%	76	%
Guaranteed maximum price	11	%	11	%
Unit price	4	%	5	%
Cost plus fee and other	9	%	8	%
Total backlog	100	%	100	%

Competition

While the construction markets include numerous competitors, especially for small to mid-sized projects, much of the work that we target is for larger, more complex projects where there are typically fewer active market participants due to the greater capabilities and resources required to perform the work. In addition to domestic competitors, we have seen certain foreign competitors attempting to grow their presence in the United States over the past several years, particularly through the pursuit of large civil projects. In recent years, however, we have observed a diminished presence from some of these foreign competitors in the bidding for several of the larger U.S. project opportunities. We believe price, experience, reputation, responsiveness, customer relationships, project completion track record, schedule control, risk management and quality of work are key factors customers consider when awarding contracts.

In our Civil segment, we compete principally with large civil construction firms, including (alphabetically) Dragados USA; Fluor Corporation; Granite Construction; Kiewit Corporation; Skanska USA; Traylor Bros., Inc.; and The Walsh Group. In our Building segment, we compete with a variety of national and regional contractors, including (alphabetically) AECOM (through

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its acquisitions of Tishman Construction and Hunt Construction Group); Balfour Beatty Construction; Clark Construction Group; DPR Construction; Gilbane, Inc.; Hensel Phelps Construction Co.; McCarthy Building Companies, Inc.; Skanska USA; Suffolk Construction; and Turner Construction Company. In our Specialty Contractors segment, we compete principally with various regional and local electrical, mechanical and plumbing subcontractors.

Construction Costs

If prices for materials, labor or equipment increase excessively, provisions in certain types of contracts often shift all or a major portion of any adverse impact to the customer. In our fixed price contracts, we attempt to insulate ourselves from the unfavorable effects of inflation, when possible, by incorporating escalating wage and price assumptions into our construction cost estimates, by obtaining firm fixed price quotes from major subcontractors and material suppliers, and by securing purchase commitments for materials early in the project schedule. Construction and other materials used in our construction activities are generally available locally from multiple sources and have been in adequate supply during recent years. Labor resources for our domestic projects are largely obtained through various labor unions. We have not experienced significant labor shortages in recent years, nor do we expect to in the near future, although a significant, rapid growth in our backlog may lead to situations in which labor resources become constrained. We employ expatriate and local labor in selected overseas areas.

Seasonality

We experience seasonal trends in our business. Our revenue and operating income are typically higher in the second half of the year. Our first fiscal quarter of the year is typically our lowest revenue quarter, as the harsher winter weather conditions that often occur during this period can negatively impact our ability to execute work and our productivity in parts of North America. Our revenue typically increases during the high construction seasons of the summer and fall months in the United States. Within the United States, as well as in other parts of the world, our business generally benefits from milder weather conditions during our third fiscal quarter, which allows for more productivity from our on-site construction operations. For these reasons, coupled with the number and significance of customer contracts commenced and completed during a particular period, it is not unusual for us to experience seasonal changes or fluctuations in our quarterly operating results.

Government Contracts

Most of our federal, state and local government customers can terminate, renegotiate, or modify any of their contracts with us at their election, and many of our federal government contracts are subject to renewal or extension periodically. Revenue derived from federal, state and local government customers was approximately 60% of our total revenue for each of the years ended December 31, 2020, 2019 and 2018.

Environmental, Health and Safety Regulations

Environmental, health and safety regulations and requirements materially affect our business. We are firmly committed to providing a safe and healthy work environment for our employees and to working in a manner that ensures the safety of our subcontractors, customers and the general public, as well as the protection of facilities, equipment and the environment. Compliance with Occupational Safety and Health Administration (“OSHA”) and other health and safety regulations, in particular, is essential to procure business and to attract and retain our workforce. Accordingly, we make considerable investments in our environmental, health and safety programs, and we factor costs associated with compliance into our project bids and proposals.

We provide construction and construction management services at various project sites, and sometimes perform work in and around sensitive environmental areas, such as rivers, lakes and wetlands. We also handle small quantities of hazardous materials on occasion. Significant fines, penalties and other sanctions may be imposed for non-compliance with environmental and health and safety laws and regulations, and some laws provide for joint and several strict liabilities for remediation of releases of hazardous substances.

Contaminants have been detected at some of the sites that we own and where we have worked as a contractor in the past, and we have incurred costs for the investigation and remediation of hazardous substances. However, we do not own the job sites upon which we perform our work. We have pollution liability insurance coverage for such matters, and if applicable, we seek indemnification from customers to cover the risks associated with environmental remediation. Accordingly, we believe that our environmental liabilities are not material. In addition, we continually evaluate our compliance with all applicable environmental laws and regulations, and believe that we are in substantial compliance with those laws and regulations.

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Insurance and Bonding

All of our properties and equipment, as well as those of our joint ventures, are covered by insurance in amounts that we believe are consistent with our risk of loss and industry practice. Our wholly owned subsidiary, PCR Insurance Company, issues policies for default insurance for our subcontractors, automobile liability, general liability and workers’ compensation insurance, allowing us to centralize our claims and risk management functions to reduce our insurance-related costs.

As a normal part of the construction business, we are often required to provide various types of surety bonds as an additional level of security for our performance. We also require many of our higher-risk subcontractors to provide surety bonds as security for payment of subcontractors and suppliers and to guarantee their performance. As an alternative to traditional surety bonds, we also have purchased subcontractor default insurance for certain construction projects to insure against the risk of subcontractor default.

Human Capital Resources

The foundation of our continuing success as a leading construction services business is our ability to attract and retain the industry’s best talent by providing a culture of opportunity, development, accountability and empowerment. This understanding guides our approach to managing our human capital resources.

Employees. Our principal asset is our employees, many of whom have technical and professional backgrounds and undergraduate and/or advanced degrees. As of December 31, 2020, we had approximately 8,700 employees (including union employees), of which approximately 2,100 were salaried and 6,600 were hourly employees. The number of employees at any given time depends on the volume and types of active projects in progress, as well as our position within the lifecycle of those projects. We believe that we have strong relationships with our employees and that the quality and level of service that our employees deliver to our customers are among the highest in our industry.

Union Workforce. We are signatory to numerous local and regional collective bargaining agreements, both directly and through trade associations, as a union contractor. These agreements cover all necessary union crafts and are subject to various renewal dates. As of December 31, 2020, our workforce included a total of approximately 4,500 union employees. Estimated amounts for wage escalation related to the expiration of union contracts are included in our bids on various projects; accordingly, the expiration of any union contract in the next year is not expected to have any material impact on us. During the past several years, we have not experienced any significant work stoppages caused by our union employees.

Talent Recruitment, Training and Retention. Our business relies upon an adequate supply of management, supervisory and field personnel. Recruiting, training and retaining key personnel has been and will remain primary goals of our human capital initiative. Through the use of management information systems, on-the-job training and educational seminars, employees are trained to understand the importance of project execution. We place a strong emphasis on training employees in accurate and comprehensive project estimating, project management and project cost control. As is common in our industry, we experience some recurring employee turnover each year, which we believe is comparable to the industry average. Historically, we have successfully attracted and retained sufficient numbers of personnel, including union personnel, to support our operational needs. We strive to ensure a fully competent project management team that includes long-term successors to our current project leaders by investing significant resources to build strong and highly competent project managers. We regularly hire construction management and engineering staff, including interns and recent graduates, and provide them with engaging projects and development programs. On the occasion when we have a need for senior project executives, the broad professional network of our leadership team often provides strong candidates to fill those needs. We also utilize internal and external recruiting specialists to help fill our open job positions. To support retention and motivation of our top talent, we provide very competitive compensation, which may include performance incentives.

Workplace Safety. We place a strong emphasis on the safety of our employees, our customers and the public. Accordingly, we conduct extensive safety training programs that have allowed us to maintain a high safety level at our worksites. All newly hired employees that will be working at project job sites undergo an initial safety orientation, and for certain types of projects or processes we conduct specific hazard training programs. Our project supervisors regularly conduct on-site safety meetings and our safety managers make random site safety inspections and perform daily assessments. In addition, operational employees are required to complete an OSHA 30-hour training program and project-specific courses on various safety topics. Moreover, we promote a culture of safety by encouraging employees to recognize, immediately correct and report all unsafe conditions.

Available Information

Our investor website address is http://investors.tutorperini.com. In the “Financial Reports” portion of our investor website, under the subsection “SEC Filings,” you may obtain free electronic copies of our annual reports on Form 10-K, quarterly

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reports on Form 10-Q, current reports on Form 8-K, and any amendments to these reports. These reports, and any amendments to them, are made available on our website as soon as reasonably practicable after we electronically file them with the Securities and Exchange Commission (“SEC”).

ITEM 1A. RISK FACTORS

We are subject to a number of known and unknown risks and uncertainties that could have a material adverse effect on our operations. Set forth below, and elsewhere in this report, are descriptions of the material risks and uncertainties that could cause our actual results to differ materially from the results contemplated by the forward-looking statements contained in this report and could have a material adverse effect on our financial condition, results of operations and cash flows.

Risks Related to Our Business and Operations

The novel coronavirus (“COVID-19”) pandemic has adversely impacted, and could continue to adversely impact, our business, financial condition and results of operations.

The World Health Organization declared the COVID-19 outbreak a pandemic and the U.S. Government declared a national emergency in March 2020. The COVID-19 pandemic has created volatility, uncertainty and economic disruption for the Company, our customers, subcontractors and suppliers, and the markets in which we do business. The scope and impact of the COVID-19 pandemic continues to evolve, and new strains of the COVID-19 virus have recently been discovered, including some that may have a higher degree of transmission. Extraordinary and wide-ranging actions have been taken by international, federal, state and local public health and governmental authorities to contain and combat the spread of COVID-19, including stay-at-home or shelter-in-place orders, social distancing measures and travel restrictions for individuals, orders for many businesses to cease or curtail normal operations unless their work is deemed essential or critical and, recently, the approvals of various vaccines and subsequent roll-outs of large-scale vaccination programs worldwide. Some of these vaccines, while highly effective against the original virus strain, may be less effective against some of the newer and more contagious variants.

While we have not experienced project cancellations as a result of the COVID-19 pandemic, we have experienced disruptions to our business operations as the pandemic has spread through the geographies where we do business. For example, beginning in mid-March of 2020, work on some non-essential construction projects was suspended or curtailed by certain customers, primarily in our Building and Specialty Contractors segments, though the vast majority of our projects in the Civil segment have been designated as essential business, allowing us to continue our work on those projects. In addition, we have modified certain business and workforce practices and implemented new protocols to promote social distancing and enhance health and safety measures on our projects and in our offices to conform to regulatory requirements and best practices encouraged by governmental and regulatory authorities, all of which has negatively affected our operations and resulted in increases in operating expenses. We have also experienced absenteeism due to illness, quarantine or fear by our employees or those of our subcontractors on certain projects, which has resulted in some disruption of our work. The COVID-19 pandemic's impacts to date have been primarily productivity inefficiencies due to project suspensions or absenteeism on certain projects, as well as additional costs associated with the new health and safety measures implemented in response to the pandemic. Any ongoing project suspensions, personnel absenteeism, or reduced work schedules or shifts required to comply with quarantines or other social distancing measures could continue to adversely affect our operations. In addition, as a result of COVID-19 containment efforts, we have experienced delays in certain bidding activities and also in legal proceedings and settlement discussions where we have claims against project owners for additional costs exceeding the contract price or for amounts not included in the original contract price. Consequently, our ability to resolve and recover on these types of claims has been and may continue to be delayed, which may adversely affect our liquidity and financial results. For further discussion regarding the impact of COVID-19 to our business, see Management's Discussion and Analysis of Financial Condition and Results of Operations contained in Item 7.

It remains too early to assess the full impact that the COVID-19 pandemic, and the actions taken in response to it, will have on our employees, our operating segments and practices, our customers, subcontractors and suppliers, and the regions that we serve, or on our financial condition and results of operations as a whole. The full impact depends on many factors that remain uncertain and subject to ongoing volatility, or that are not yet identifiable, and in many cases are out of our control. These factors could include, among other things: (1) the duration of the COVID-19 pandemic and the types and magnitude of adverse impacts on the U.S. and global economies; (2) the health and welfare of our employees, and those of our customers, subcontractors and suppliers; (3) evolving business and government actions in response to the pandemic, including stay-at-home measures, changes to what are considered “essential” businesses, social distancing measures, travel bans and additional health and safety requirements that we may be required to observe in order to continue working on our projects; (4) the varying impact that the pandemic may have on industries we serve and on government spending for infrastructure projects, including reduced government spending on infrastructure as a result of lower revenues from taxes, tolls and fares; (5) the response of our customers or prospective customers to the pandemic, including further delays, stoppages or terminations of existing projects or

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potential new awards; (6) delays in the settlement of receivables if customers are unable to pay, fail to make timely payments, request financial concessions or if we continue to experience delays in resolving claims and disputes (e.g., further delays in court proceedings or settlement discussions); (7) limitations and higher costs associated with obtaining financing; (8) potential challenges with suppliers that could limit the availability or cost of materials; (9) potential interruptions to our information systems and technology or breaches in our data security due to increasing use of remote communications and access; and (10) the extent to which and timing of when individuals become vaccinated against COVID-19 (which would contribute to the point at which “herd immunity” may be achieved), as well as the extent to which such vaccines are effective against the various current and future virus strains. Such factors may continue to result in fewer or delayed project bidding opportunities or additional or further delays on existing projects.

Any of these events or impacts we have experienced or identified could cause or contribute to the risks and uncertainties facing the Company and our customers and could materially and adversely affect our business or portions thereof, and our financial condition and results of operations. The COVID-19 pandemic and the volatile economic conditions stemming from the pandemic, as well as reactions to future pandemics or resurgences of COVID-19, could also aggravate or heighten the risks posed by other risk factors that we have identified in this Annual Report on our Form 10-K for the year ended December 31, 2020, which in turn could materially and adversely affect our business, financial condition and results of operations. There may be other adverse consequences to our business, financial condition and results of operations from the spread of COVID-19 that are not presently known or that have not yet become apparent. As a result, we cannot assure you that if COVID-19 continues to spread, it would not have a further adverse impact on our business, financial condition and results of operations.

We are involved in a significant number of legal proceedings which, if determined unfavorable to us, could adversely affect our financial results and/or cash flows, harm our reputation and/or preclude us from bidding on future projects. We also may invest significant working capital on projects while legal proceedings are being settled.

We are involved in various lawsuits, including the legal proceedings described under Note 8 of the Notes to Consolidated Financial Statements. Litigation is inherently uncertain, and it is not possible to accurately predict what the final outcome will be of any legal proceeding. We must make certain assumptions and rely on estimates, which are inherently subject to risks and uncertainties, regarding potential outcomes of legal proceedings in order to determine an appropriate contingent liability and charge to income. Any result that is materially different from our expectations and estimates could have a material adverse effect on our financial condition, results of operations and cash flows. This may include requiring us to record an expense or reduce revenue that we previously recorded based on our expectations or estimates, requiring us to pay damages or reducing cash collections that we had expected to receive. For example, on December 13, 2019, we received an adverse jury verdict in the case related to the construction of the Alaskan Way Viaduct Replacement Project (“SR 99”) by a joint venture for which the Company holds a 45% share as a minority partner. As a result of the unexpected adverse jury verdict, we recorded a pre-tax charge of $166.8 million in 2019. Refer to the Alaskan Way Viaduct (SR 99) Matter in Note 8 of the Notes to Consolidated Financial Statements for further discussion. In addition, any adverse judgments could harm our reputation and preclude us from bidding on future projects.

We may bring claims against project owners for additional cost exceeding the contract price or for amounts not included in the original contract price. When these types of events occur and unresolved claims are pending, we may invest significant working capital in projects to cover cost overruns pending the resolution of the relevant claims. A failure to promptly recover on these types of claims could have a material adverse effect on our liquidity and financial results.

If we are unable to accurately estimate contract risks, revenue or costs, the timing of new awards, or the pace of project execution, we may incur a loss or achieve lower than anticipated profit.

Accounting for contract-related revenue and costs requires management to make significant estimates and assumptions that may change substantially throughout the project lifecycle, which has previously resulted, and in the future could result, in a material impact to our consolidated financial statements. In addition, cost overruns, including unanticipated cost increases on fixed price and guaranteed maximum price contracts, have previously resulted, and in the future may result, in lower profits or losses. Changes in laws, policies or regulations, including tariffs and taxes, have previously impacted, and in the future could impact, the prices for materials or equipment. Further, our results of operations have historically fluctuated, and may continue to fluctuate, quarterly and annually depending on when new awards occur and the commencement and progress of work on projects already awarded.

Our contracts require us to perform extra, or change order, work which can result in disputes or claims and adversely affect our working capital, profits and cash flows.

Our contracts generally require us to perform extra, or change order, work as directed by the customer even if the customer has not agreed in advance on the scope and/or price of the work to be performed. This process may result in disputes or claims over

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whether the work performed is beyond the scope of work directed by the customer and/or exceeds the price the customer is willing to pay for the work performed. To the extent we do not recover our costs for this work or there are delays in the recovery of these costs, our working capital, profits and cash flows could be adversely impacted.

Our actual results could differ from the assumptions and estimates used to prepare our financial statements.

In preparing our financial statements, we are required under generally accepted accounting principles in the United States (“GAAP”) to make estimates and assumptions as of the date of the financial statements. These estimates and assumptions affect the reported values of assets, liabilities, revenue and expenses, and the disclosure of contingent assets and liabilities. Areas requiring significant estimates by our management include, but are not limited to:

• recognition of contract revenue, costs, profits or losses in applying the principles of revenue accounting;

• recognition of revenue related to project incentives or awards we expect to receive;

• recognition of recoveries under contract change orders or claims;

• estimated amounts for expected project losses, warranty costs, contract closeout or other costs;

• collectability of billed and unbilled accounts receivable;

• asset valuations;

• income tax provisions and related valuation allowances;

• determination of expense and potential liabilities under pension and other post-retirement benefit programs; and

• accruals for other estimated liabilities, including litigation and insurance reserves.

Our actual business and financial results could differ from our estimates of such results, which could have a material adverse impact on our financial condition and reported results of operations.

A significant slowdown or decline in economic conditions could adversely affect our operations.

Any significant decline in economic conditions in any of the markets we serve or uncertainty regarding the economic outlook (apart from the COVID-19 related impacts discussed above) could result in a decline in demand for infrastructure projects and commercial building developments. In addition, any instability in the financial and credit markets could negatively impact our customers’ ability to pay us on a timely basis, or at all, for work on projects already under construction, could cause our customers to delay or cancel construction projects in our backlog or could create difficulties for customers to obtain adequate financing to fund new construction projects. Such consequences could have an adverse impact on our future operating results. Lastly, we are more susceptible to adverse economic conditions in New York and California, as a significant portion of our operations are concentrated in those states.

The level of federal, state and local government spending for infrastructure and other public projects could adversely affect the number of projects available to us in the future.

The civil construction and public-works building markets are dependent on the amount of work funded by various government agencies, which depends on many factors, including the condition of the existing infrastructure and buildings; the need for new or expanded infrastructure and buildings; and federal, state and local government spending levels. As a result, our future operating results could be negatively impacted by any decrease in demand for public projects or decrease or delay in government funding, which could result from a variety of factors, including extended government shutdowns, delays in the sale of voter-approved bonds, budget shortfalls, credit rating downgrades or long-term impairment in the ability of state and local governments to raise capital in the municipal bond market. In 2020, some of our customers experienced budget shortfalls due to COVID-19 impacts, which resulted in delayed revenue, a lower volume of new awards and reduced backlog for the Company.

We require substantial personnel, including construction and project managers and specialty subcontractor resources, to execute and perform on our contracts in backlog. The successful execution of our business strategies is also dependent upon our ability to attract and retain our key officers, as well as adequately plan for their succession.

Our ability to execute and perform on our contracts in backlog depends in large part upon our ability to hire and retain highly skilled personnel, including project and construction management and trade labor resources, such as carpenters, masons and other skilled workers. In the event we are unable to attract, hire and retain the requisite personnel and subcontractors necessary to execute and perform on our contracts in backlog, we may experience delays in completing projects in accordance with project schedules or an increase in expected costs, both of which could have a material adverse effect on our financial results, our reputation and our relationships. In addition, if we lack the personnel and specialty subcontractors necessary to perform on our current contract backlog, we may find it necessary to curtail our pursuit of new projects. A significant, rapid growth in our backlog may lead to situations in which labor resources become constrained.

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The execution of our business strategies also substantially depends on our ability to retain several key members of our management. Losing any of these individuals could adversely affect our business. The majority of these key individuals are not bound by employment agreements. Volatility or lack of positive performance in our stock price may adversely affect our ability to retain key individuals to whom we have provided share-based compensation. Additionally, because a substantial portion of our key officers' compensation is placed “at risk” and linked to the performance of our business, when our operating results are negatively impacted, we are at greater risk of employee turnover. If we lose any key officer due to voluntary or involuntary termination, including as a result of death or disability, and we do not have qualified successors in place, our operating results could be harmed.

The construction services industry is highly schedule driven, and our failure to meet the schedule requirements of our contracts could adversely affect our reputation and/or expose us to financial liability.

Many of our contracts are subject to specific completion schedule requirements. Failure to meet contractual schedule requirements has subjected us, and in the future could subject us, to liquidated damages, liability for our customer’s actual cost arising out of our delay and damage to our reputation.

We may not fully realize the revenue value reported in our backlog due to cancellations or reductions in scope.

As of December 31, 2020, our backlog of uncompleted construction work was approximately $8.3 billion. The revenue projected in our backlog may not be fully realized and, in some cases, if realized, may not result in profits or may be less profitable than expected. The cancellation or reduction in scope of significant projects included in our backlog could have a material adverse effect on our financial condition, results of operations and cash flows.

Systems and information technology interruption and breaches in data security could adversely impact our ability to operate and negatively impact our operating results.

We rely on computer, information and communication technology and other related systems, some of which are hosted by third party providers, for various business processes and activities, including project management, accounting, financial reporting and business development. These systems have been and may, in the future, be subject to interruptions or damage by a variety of factors including, but not limited to, cyber-attacks, natural disasters, power loss, telecommunications failures, acts of war, computer viruses, obsolescence and physical damage. Such interruptions can result in a loss of critical data, a delay in operations, damage to our reputation or an unintentional disclosure of customer confidential or personally identifiable information, any of which could have a material adverse impact on us and our consolidated financial statements.

In addition, various privacy and security laws require us to protect sensitive and confidential information from disclosure. We dedicate considerable attention and resources to the safeguarding of our information technology systems. Nevertheless, our systems are at risk for cyber-attacks. Consequently, we may need to engage significant resources in the future to remediate the impact of, or further mitigate the risk of, such an attack. Any successful cyber-attack can result in the criminal, or otherwise illegitimate use of, confidential data, including our data or third-party data for which we have the responsibility for safekeeping. Additionally, such an attack could adversely affect our operations, reputation and financial results.

Competition for new project awards is intense, and our failure to compete effectively could reduce our market share and profits.

New project awards are determined through either a competitive bid basis or on a negotiated basis. Projects may be awarded based solely upon price, but often take into account other factors, such as technical qualifications, proposed project team, schedule and past performance on similar projects. Within our industry, we compete with many international, regional and local construction firms. Some of these competitors have achieved greater market penetration than we have in the markets in which we compete, and some have greater resources than we do. If we are unable to compete successfully in such markets, our relative market share and profits could be reduced.

Our participation in construction joint ventures exposes us to liability and/or harm to our reputation for failures by our partners.

As part of our business, we enter into joint venture arrangements typically to jointly bid on and execute particular projects, thereby reducing our risk profile while enhancing the execution capability and financial reward of project teams. Success on these joint projects depends in large part on whether our joint venture partners satisfy their contractual obligations. Generally, we and our joint venture partners are jointly and severally liable for all liabilities and obligations of our joint ventures. If a joint venture partner fails to perform or is financially unable to bear its portion of required capital contributions or other obligations, including liabilities stemming from lawsuits, we could be required to make additional investments, provide additional services

13

or pay more than our proportionate share of a liability to make up for our partner’s shortfall. Further, if we are unable to adequately address our partner’s performance issues, the customer may terminate the project, which could result in legal liability to us, harm our reputation, reduce our profit on a project or, in some cases, result in a loss.

Our international operations expose us to economic, political, regulatory and other risks, as well as uncertainty related to U.S. Government funding, which could adversely affect our revenue and earnings.

For the year ended December 31, 2020, we derived $365.7 million of revenue from our work on projects located outside of the United States. Our international operations expose us to risks inherent in doing business in certain hostile regions outside the United States, including political risks; risks of loss due to acts of war; unstable economic, financial and market conditions; potential incompatibility with foreign subcontractors and vendors; foreign currency controls and fluctuations; trade restrictions; logistical challenges; variations in taxes; and changes in labor conditions, labor strikes and difficulties in staffing and managing international operations. Failure to successfully manage risks associated with our international operations could result in higher operating costs than anticipated or could delay or limit our ability to generate revenue and income from construction operations in key international markets.

The U.S. federal government has approved various spending bills for the construction of defense- and diplomacy-related projects and has allocated significant funds to the defense of U.S. interests around the world from the threat of terrorism. The federal government has also approved funds for development in conjunction with the relocation of military personnel into Guam. However, federal government funding levels for construction projects in the Middle East have decreased significantly over the past several years as the U.S. government has reduced the number of military troops and support personnel in the region. As a result, we have seen a decrease in the number and size of federal government projects available to us in this region. Any decrease in U.S. federal government funding for projects in Guam or in other U.S. Territories or countries in which we are pursuing work may result in project delays or cancellations, which could reduce our revenue and earnings.

Weather can significantly affect our revenue and profitability.

Inclement weather conditions, such as significant storms and unusual temperatures, can impact our ability to perform work. Adverse weather conditions can cause delays and increases in project costs, resulting in variability in our revenue and profitability.

We are subject to risks related to government contracts and related procurement regulations.

Our contracts with U.S. federal, as well as state, local and foreign, government entities are subject to various procurement regulations and other requirements relating to their formation, administration and performance. We are subject to audits and investigations relating to our government contracts, and any violations could result in various civil and criminal penalties and administrative sanctions, including termination of contract, refunding or suspending of payments, forfeiture of profits, payment of fines and suspension or debarment from future government business. In addition, most of these contracts provide for termination or renegotiation by the government at any time, without cause, which could have an adverse effect on our business and operations.

We could be adversely affected by violations of the U.S. Foreign Corrupt Practices Act and similar worldwide anti-bribery laws.

The U.S. Foreign Corrupt Practices Act of 1977, the U.K. Bribery Act of 2010, and similar anti-bribery laws in other jurisdictions generally prohibit companies and their intermediaries from making improper payments for the purpose of obtaining or retaining business. While our policies mandate compliance with these anti-bribery laws, there is no assurance that our policies and procedures will protect us from circumstances or actions that could result in possible criminal penalties or other sanctions, including contract cancellations or debarment and loss of reputation, any of which could have a material adverse impact on our business, financial condition, and results of operations.

In connection with mergers and acquisitions, we have recorded goodwill and other intangible assets that could become impaired and adversely affect our operating results. Assessing whether impairment has occurred requires us to make significant judgments and assumptions about the future, which are inherently subject to risks and uncertainties, and if actual events turn out to be materially less favorable than the judgments we make and the assumptions we use, we may be required to record impairment charges in the future.

We had $255.5 million of goodwill and indefinite-lived intangible assets recorded on our Consolidated Balance Sheet as of December 31, 2020. We assess these assets for impairment annually, or more often if required. Our assessments involve a number of estimates and assumptions that are inherently subjective, require significant judgment and involve highly uncertain

14

matters that are subject to change. The use of different assumptions or estimates could materially affect the determination as to whether or not an impairment has occurred. In addition, if future events are less favorable than what we assumed or estimated in our impairment analysis, we may be required to record an impairment charge, which could have a material adverse impact on our consolidated financial statements.

Adverse health events, such as an epidemic or a pandemic, could adversely impact our business.

From time to time, various diseases have spread across the globe, such as the recent COVID-19. If a disease spreads sufficiently to cause an epidemic or a pandemic, our business or the business of our suppliers, subcontractors or customers could be adversely impacted.

Risks Related to Our Capital Structure

We have a substantial amount of indebtedness which could adversely affect our financial position and prevent us from fulfilling our obligations under our debt agreements.

We currently have, and expect to continue to have, a substantial amount of indebtedness. As of December 31, 2020, our total debt was $1.0 billion, with $100.2 million classified as current debt. If we are unable to meet the terms of the financial covenants or fail to comply with any of the other restrictions contained in the agreements governing our indebtedness, an event of default could occur, causing the debt related to such agreements to become immediately due. If such acceleration occurs, we may not be able to repay such indebtedness as required. Since indebtedness under our credit agreement entered into on August 18, 2020 (the “2020 Credit Agreement”) with BMO Harris Bank N.A., as Administrative Agent, Swing Line Lender and L/C Issuer and other lenders is secured by substantially all of our assets, acceleration of this debt could result in foreclosure of those assets and a negative impact on our operations. In addition, a failure to meet the terms of our 2020 Credit Agreement could result in a reduction of future borrowing capacity under the 2020 Credit Agreement, causing a loss of liquidity. A loss of liquidity could adversely impact our ability to execute projects in our backlog, obtain new projects, engage subcontractors, and attract and retain key employees.

Downgrades in our credit ratings could have a material adverse effect on our business and financial condition.

The Company’s debt rating was downgraded by a major credit rating agency on March 23, 2020. The credit ratings assigned to us and our debt are subject to ongoing evaluation by credit rating agencies and could change based upon, among other things, our results of operations and financial condition. Actual or anticipated changes or downgrades in our credit ratings, including any announcement that our ratings are under review for a downgrade, could have a material adverse effect on our costs and availability of capital, which could in turn have a material adverse effect on our financial condition, results of operations, cash flows and our ability to satisfy our debt service obligations. Negative changes in our credit ratings could also result in more stringent covenants and higher interest rates with regard to any new or refinanced debt.

The phase-out of the London Interbank Offered Rate (“LIBOR”), or the replacement of LIBOR with a different reference rate, may adversely affect interest rates paid on some of our loans and, consequently, our earnings and cash flows.

Borrowings under our 2020 Credit Agreement and the variable portion of our equipment financing and mortgages use interest rates in relation to LIBOR. In 2017, the United Kingdom’s Financial Conduct Authority, which regulates LIBOR, announced that it intends to phase out LIBOR by the end of 2021. It is unclear if LIBOR will cease to exist at that time or if new methods of calculating LIBOR will be established such that it continues to exist after 2021. The expected phase out of LIBOR could cause market volatility or disruption and may adversely affect our access to the capital markets and cost of funding.

Risk Related to Our Stock Ownership

Our chairman and chief executive officer could exert influence over the Company due to his position and significant ownership interest.

As of December 31, 2020, our chairman and chief executive officer, Ronald N. Tutor, and three trusts controlled by Mr. Tutor (the “Tutor Group”) owned approximately 16% of the outstanding shares of our common stock. Additionally, one of our current directors was appointed by Mr. Tutor pursuant to his right to nominate one member to our Board of Directors, so long as the Tutor Group owns at least 11.25% of the outstanding shares of our common stock. Accordingly, Mr. Tutor could exert influence over the outcome of a range of corporate matters, including the election of directors and the approval or rejection of other extraordinary transactions, such as a takeover attempt or sale of the Company or its assets.

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ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

We have office facilities and equipment yards in the following locations, which we believe are suitable and adequate for our current needs:

Offices	Owned or Leased by Tutor Perini	Business Segment(s)
Los Angeles (Sylmar), CA	Owned and Leased	Corporate, Civil & Specialty Contractors
Barrigada, Guam	Owned	Civil
Black River Falls, WI	Owned	Civil
Evansville, IN	Owned	Civil
Fort Lauderdale, FL	Leased	Building & Specialty Contractors
Framingham, MA	Owned	Building
Gulfport, MS	Owned	Building
Henderson, NV	Owned	Building & Specialty Contractors
Houston, TX	Owned	Specialty Contractors
Jessup, MD	Owned	Civil
Lakeview Terrace, CA	Leased	Specialty Contractors
Mount Vernon, NY	Leased	Specialty Contractors
New Rochelle, NY	Owned	Civil
Ozone Park, NY	Owned	Specialty Contractors
Philadelphia, PA	Leased	Building
San Carlos, CA	Leased	Building
Equipment Yards	Owned or Leased by Tutor Perini	Business Segment(s)
Black River Falls, WI	Owned	Civil
Evansville, IN	Owned	Civil
Fontana, CA	Leased	Civil
Hilbert, WI	Owned	Civil
Lakeview Terrace, CA	Leased	Specialty Contractors
Rosemount, MN	Owned	Civil
Stockton, CA	Owned	Building
Waukesha, WI	Owned	Civil

ITEM 3. LEGAL PROCEEDINGS

Legal proceedings are discussed in Note 8 of the Notes to Consolidated Financial Statements and are incorporated herein by reference.

ITEM 4. MINE SAFETY DISCLOSURES

We do not own or operate any mines; however, we may be considered a mine operator under the Federal Mine Safety and Health Act of 1977 because we provide construction services to customers in the mining industry. Accordingly, we provide information regarding mine safety violations and other mining regulation matters in Exhibit 95 to this Form 10-K.

PART II.

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock is traded on the New York Stock Exchange under the symbol “TPC.”

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Holders

At February 19, 2021, there were 354 holders of record of our common stock, including holders of record on behalf of an indeterminate number of beneficial owners.

Dividends and Issuer Purchases of Equity Securities

We did not repurchase any of our common stock during the fourth quarter of 2020. We have not historically paid dividends on our common stock and have no immediate plans to do so.

Issuance of Unregistered Securities

None.

Performance Graph

The following graph compares the cumulative five-year total return to shareholders on our common stock relative to the cumulative total returns of the NYSE Composite Index and the Dow Jones U.S. Heavy Construction Index. We selected the Dow Jones U.S. Heavy Construction Index because we believe the index reflects the market conditions within the industry in which we primarily operate. The comparison of total return on investment, defined as the change in year-end stock price plus reinvested dividends, for each of the periods assumes that $100 was invested on December 31, 2015 in each of our common stock, the NYSE Composite Index and the Dow Jones U.S. Heavy Construction Index, with investment weighted on the basis of market capitalization.

The comparisons in the following graph are based on historical data and are not intended to forecast the possible future performance of our common stock.

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ITEM 6. SELECTED FINANCIAL DATA

Selected Consolidated Financial Information

The following tables present selected financial data for the last five years. This selected financial data should be read in conjunction with Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations, Item 15. Exhibits and Financial Statement Schedules, and the other information included elsewhere in this Annual Report.

CONSOLIDATED OPERATING RESULTS	Year Ended December 31,
(in thousands, except per common share data)	2020		2019		2018		2017		2016
Revenue:
Civil	$	2,199,899	$	1,779,352	$	1,586,093	$	1,602,175	$	1,668,963
Building	1,984,641		1,742,040		1,861,699		1,941,325		2,069,841
Specialty Contractors	1,134,223		929,440		1,006,870		1,213,708		1,234,272
Total	5,318,763		4,450,832		4,454,662		4,757,208		4,973,076
Cost of operations	(4,832,610)		(4,209,060)		(4,000,209)		(4,302,803)		(4,515,886)
Gross profit(a)	486,153		241,772		454,453		454,405		457,190
General and administrative expenses(b)	(223,809)		(226,916)		(262,577)		(274,928)		(255,270)
Goodwill impairment(c)	—		(379,863)		—		—		—
Income (loss) from construction operations	262,344		(365,007)		191,876		179,477		201,920
Other income (expense)(d)	(11,853)		6,667		4,256		43,882		6,977
Interest expense	(76,212)		(67,494)		(63,519)		(69,384)		(59,782)
Income (loss) before income taxes	174,279		(425,834)		132,613		153,975		149,115
Income tax (expense) benefit(e)	(21,942)		65,609		(34,832)		569		(53,293)
Net income (loss)	152,337		(360,225)		97,781		154,544		95,822
Less: Net income attributable to noncontrolling interests	43,943		27,465		14,345		6,162		—
Net income (loss) attributable to Tutor Perini Corporation	$	108,394	$	(387,690)	$	83,436	$	148,382	$	95,822
Earnings (loss) per common share:(a)(b)(c)(d)(e)
Basic	$	2.14	$	(7.72)	$	1.67	$	2.99	$	1.95
Diluted	$	2.12	$	(7.72)	$	1.66	$	2.92	$	1.92
Weighted-average common shares outstanding:
Basic	50,656		50,220		49,952		49,647		49,150
Diluted	51,077		50,220		50,301		50,759		49,864

_____________________________________________________________________________________________________________

(a)During the year ended December 31, 2020, the Company recorded a charge of $15.2 million in gross profit ($0.22 per diluted share) due to an unfavorable legal ruling pertaining to a mechanical project in California in the Specialty Contractors segment, as well as a charge of $13.2 million ($0.19 per diluted share) due to an adverse arbitration ruling pertaining to an electrical project in New York in the Specialty Contractors segment.

During the year ended December 31, 2019, the Company recorded a charge of $166.8 million in gross profit ($2.38 per diluted share) as a result of the adverse jury verdict in the case related to the construction of SR 99 by a joint venture for which the Company holds a 45% share as a minority partner. Refer to the Alaskan Way Viaduct (SR 99) Matter discussion in Note 8 of the Notes to Consolidated Financial Statements for further discussion of this item.

During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in gross profit ($0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.

(b)During the year ended December 31, 2020, the Company recognized a gain of $25.7 million ($0.36 per diluted share) as a result of a favorable arbitration decision and subsequent settlement of the related employment dispute in the Specialty Contractors segment.

During the year ended December 31, 2019, the Company recognized a one-time gain of $37.8 million ($0.54 per diluted share) related to the Company’s acquisition of an additional 25% interest in a Civil segment joint venture for which the Company gained a controlling financial interest. The gain resulted from the remeasurement to fair value of the Company’s existing investment in the joint venture. For further discussion on the acquisition and the related remeasurement, see Note 12 of the Notes to Consolidated Financial Statements.

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(c)During the year ended December 31, 2019, the Company recorded a non-cash goodwill impairment charge of $379.9 million in income (loss) from construction operations ($6.58 per diluted share) resulting from an interim impairment test the Company performed as of June 1, 2019. For further information and breakdown of the goodwill impairment charge by segment, see Note 6 of the Notes to Consolidated Financial Statements.

(d)On June 6, 2017, the Company received $37.0 million ($0.43 per diluted share) in a cash settlement with Merrill Lynch, Pierce, Fenner & Smith Incorporated, as successor in interest to Banc of America Securities LLC and Bank of America, N.A. (collectively “BofA”). The settlement pertained to litigation, which was filed by the Company in 2011, and related to the purchase by the Company of certain auction-rate securities from BofA.

(e)Income tax expense for the year ended December 31, 2020 includes a federal tax benefit of $14.5 million ($0.28 per diluted share) arising from the carryback of net operating losses to years with a 35% statutory rate due to enactment of the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) (see Note 5 of the Notes to Consolidated Financial Statements).

As mentioned above in footnote (c), the Company recorded a $379.9 million goodwill impairment charge during 2019, of which approximately $209.5 million was not deductible for income tax purposes. The Company recognized a tax benefit totaling $49.4 million ($0.98 per diluted share) as a result of the impairment charge.

In December 2017, the Tax Cuts and Jobs Act of 2017 (“TCJA”) was enacted reducing the U.S. corporate income tax rate from 35% to 21%, effective in 2018. As a result, tax expense in 2018 through 2020 was positively impacted and in 2017 the Company recognized a favorable tax adjustment of $53.3 million ($1.05 per diluted share) primarily due to a one-time revaluation of its deferred tax assets and liabilities in connection with the adoption of the TCJA.

	As of and For the Year Ended December 31,
(in thousands, except ratios and percentages)	2020			2019			2018			2017			2016
CONSOLIDATED FINANCIAL POSITION
Current assets	$	4,080,457		$	3,510,986		$	3,175,643		$	3,074,392		$	2,837,756
Current liabilities	2,264,363			2,109,856			1,597,966			1,581,846			1,518,943
Working capital	$	1,816,094		$	1,401,130		$	1,577,677		$	1,492,546		$	1,318,813
Current ratio	1.80			1.66			1.99			1.94			1.87
Property and equipment, net of accumulated depreciation	$	489,217		$	509,685		$	490,669		$	467,499		$	477,626
Total assets	5,045,617			4,485,777			4,387,752			4,264,123			4,038,620
Capitalization:
Total debt	1,025,465			834,476			761,504			736,276			759,519
Stockholders’ equity	1,553,856			1,440,142			1,809,177			1,713,275			1,553,023
Total capitalization	$	2,579,321		$	2,274,618		$	2,570,681		$	2,449,551		$	2,312,542
Total debt as a percentage of total capitalization	40		%	37		%	30		%	30		%	33		%
Ratio of debt to equity	0.66			0.58			0.42			0.43			0.49
Stockholders' equity per common share	$	30.57		$	28.64		$	36.16		$	34.42		$	31.56
OTHER DATA
Backlog at year end	$	8,345,717		$	11,221,110		$	9,296,691		$	7,283,434		$	6,227,137
New awards	2,443,370			6,375,262			6,467,918			5,813,505			3,735,084
Capital expenditures	54,781			84,196			77,069			30,280			15,743
Net cash provided by operating activities	172,772			136,530			21,402			163,550			113,336
Net cash used in investing activities	(46,358)			(76,055)			(70,208)			(87,133)			(13,844)
Net cash provided by (used in) financing activities	123,337			21,763			(28,979)			(75,376)			(24,190)

_____________________________________________________________________________________________________________

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our Consolidated Financial Statements and the accompanying Notes to Consolidated Financial Statements included in Item 15. Exhibits and Financial Statement Schedules in this Annual Report. This discussion contains forward-looking statements, which involve risks and uncertainties. For cautions about relying on such forward-looking statements, please refer to the section entitled Forward-Looking Statements at the beginning of this Annual Report immediately prior to Item 1. Our actual results

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could differ materially from those anticipated in the forward-looking statements as a result of certain factors, including, but not limited to, those discussed in Item 1A. Risk Factors and elsewhere in this Annual Report.

Comparison of 2019 and 2018 Results

For a discussion comparing our 2019 results to our 2018 results, refer to Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission on February 26, 2020.

Executive Overview

COVID-19 Update

In the first quarter of 2020, the outbreak of a novel strain of coronavirus, COVID-19, was declared a pandemic. Efforts in the United States to prevent the spread of COVID-19 and mitigate its impacts intensified in March 2020. All 50 states in the United States declared states of emergency, and various countries around the world, including the United States, took steps to restrict travel. Many states and cities within the United States also enacted temporary closures of businesses, issued stay-at-home orders and implemented other restrictive measures in response to the pandemic. The pace of easing and the continued level of restrictions have varied across regions based on the rates of new COVID-19 cases and hospitalizations, and this variability is expected to continue until infection rates decrease to levels that are more acceptable to public health officials. Several vaccines have been developed and approved, or are in the process of being approved, and large-scale immunization programs have commenced worldwide, with recipients being offered the vaccine based upon government-approved priority classifications and schedules. These vaccines are highly effective against the original COVID-19 virus strain, but may not be as effective against certain new variants that have recently been discovered nor against other future variants.

In 2020, the COVID-19 pandemic caused a lack of available manpower, a reduction in field labor productivity, other inefficiencies, delays to project schedules, deferral of project execution and, consequently, incremental costs estimated to be in excess of $50 million, much of which we are seeking to recover from our customers as allowed by contractual terms. The relief sought from customers, some of which has already been received, helped reduce the pandemic's negative impact on our revenue for the year to an estimated $290 million and income from construction operations to an estimated $21 million (with much of the revenue and income from construction operations associated with these impacts expected to be recognized in future periods). In addition, the pandemic caused the cancellation of a transaction to sell an office building that would have resulted in other income of approximately $8 million. Altogether, we estimate that the pandemic negatively impacted EPS by $0.41 in 2020, partially offsetting the results for the year.

The vast majority of our projects, especially in the Civil segment, have been and continue to be considered essential business activities, which has allowed projects to continue while implementing new health and safety requirements. However, the COVID-19 pandemic had an adverse effect on the volume of our new awards and, correspondingly, backlog in 2020. Many of our state and local government customers’ revenue sources have been negatively impacted by the pandemic due to severely curtailed ridership on mass-transit systems (buses, subways, trains, etc.), travel on commercial airlines, and driving by the general public, which resulted in reduced fare and toll collections, lower fuel tax receipts and reduced airport and other facility usage fees. Sales and other tax revenues have also been negatively affected by reduced spending, as the retail, travel, hospitality and entertainment industries, among others, have suffered through periodic government-imposed shut-downs or occupancy restrictions. These tax revenue shortfalls led to, and could continue to result in, funding uncertainties that have caused customers to delay bid solicitations and contract awards for many of their planned infrastructure projects. Our reduced backlog combined with the possibility of continued pandemic-related delays in project bids and awards could result in lower-than-expected revenue and earnings until such time as the federal government provides supplemental funding support (should that occur) to our customers or when customers’ funding uncertainties are otherwise resolved.

While the recently commenced COVID-19 vaccination programs offer hope that society and business environments may return to a greater sense of normalcy in the second half of 2021, the timing and pace of such a return to normalcy are difficult to predict. As such, due to the fluidity of the COVID-19 pandemic, uncertainties as to its scope and duration, and ongoing changes in the way that governments, businesses and individuals react and respond to the pandemic, the Company is unable at this time to accurately predict the pandemic’s future impact on the Company’s business, results of operations, financial condition or liquidity. Among other things, governments could prohibit the continuation of certain projects that to date have been designated as “essential” or could impose health, safety and other operational requirements on such projects that could result in delays to or suspensions of such projects. In addition, employees and contractors working on such projects could be unable or unwilling to continue working on them, perhaps for extended periods, because they may be unable or unwilling to be immunized against COVID-19, or for other reasons. The COVID-19 pandemic also could negatively affect the ability of counterparties to make required payments on a timely basis or at all.

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Operating Results

Consolidated revenue for 2020 was $5.3 billion, an increase of 20% compared to $4.5 billion in 2019. The growth was primarily attributable to increased activities on several infrastructure projects in California and the Northeast, and various building projects in California. The revenue growth in 2020 was reduced by the COVID-19 impact mentioned above. Revenue in 2019 was negatively impacted by a $123.9 million reduction associated with the SR 99 charge discussed in the following paragraph.

Income from construction operations in 2020 was $262.3 million compared to a loss from construction operations of $365.0 million in 2019. Adjusted income from construction operations for 2019, which is a non-GAAP financial measure and excludes the $379.9 million non-cash goodwill impairment charge incurred in that year, was $14.9 million. (For a discussion of non-GAAP financial measures, including a reconciliation of non-GAAP financial measures to the most nearly comparable GAAP financial measures, see the section below titled Non-GAAP Financial Measures.) The increase in 2020 was driven by contributions from the above-mentioned infrastructure projects, as well as the absence of a prior-year $166.8 million pre-tax charge related to the adverse SR 99 jury verdict. (The SR 99-related charge in 2019 principally impacted the Civil segment. For additional information, refer to the Alaskan Way Viaduct (SR 99) Matter discussion in Note 8 of the Notes to Consolidated Financial Statements.) The increase was partially offset by the COVID-19 impact mentioned above.

The provision for income taxes was $21.9 million for 2020 compared to an income tax benefit of $65.6 million for 2019. The effective tax rate for 2020 was 12.6% compared to 15.4% for 2019. The effective tax rate in 2020 primarily reflects tax benefits related to provisions of the CARES Act. The income tax benefit in 2019 resulted from the pre-tax loss primarily related to the goodwill impairment and SR 99 charges mentioned above. See Corporate, Tax and Other Matters below for a discussion of the changes in the effective tax rate.

Diluted earnings per share for 2020 was $2.12 compared to diluted loss per share of $7.72 for 2019. The COVID-19 pandemic had an estimated negative impact on diluted earnings per share of $0.41 for 2020. For 2019, adjusted diluted loss per share, which is a non-GAAP financial measure and excludes the goodwill impairment charge (and the associated tax benefit) incurred in that year, was $1.14. The increase in 2020 was principally due to the factors discussed above that drove the increase in income from construction operations, as well as the impact of the favorable income tax rate in 2020.

Consolidated new awards in 2020 were $2.4 billion compared to $6.4 billion in 2019. The lower volume of new awards in 2020 was primarily due to the impacts of the COVID-19 pandemic, which delayed certain customers from moving forward with planned project bid solicitations and contract awards due to budgetary impacts, funding uncertainties and customer staffing challenges. In addition, new awards in 2020 were negatively impacted by the timing of bids and awards for certain large prospective project opportunities, which the Company expects will occur in 2021 and 2022. The Civil and Building segments were the primary contributors to the new award activity in 2020. Significant new awards included approximately $732 million for various mass-transit projects; approximately $615 million for various building projects in California; $286 million for various electrical projects in Texas, California and Florida; $271 million for several government facilities projects nationwide; and $158 million for various electrical projects in New York.

Consolidated backlog as of December 31, 2020 was $8.3 billion compared to $11.2 billion as of December 31, 2019. Backlog declined as a result of the higher current year revenue generated from near-record backlog at the end of 2019 outpacing current year new awards, which were negatively impacted by the COVID-19 pandemic. As of December 31, 2020, the mix of backlog by segment was 57% for Civil, 20% for Building and 23% for Specialty Contractors.

Most projects in the Civil segment’s backlog typically convert to revenue over a period of three to five years and in the Building and Specialty Contractors segments over a period of one to three years. We estimate that approximately $4 billion, or 47%, of our backlog as of December 31, 2020 will be recognized as revenue in 2021.

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The following table presents the changes in backlog in 2020:

(in millions)	Backlog at December 31, 2019		New Awards in 2020(a)		Revenue Recognized in 2020		Backlog at December 31, 2020(b)
Civil	$	6,037.2	$	946.3	$	(2,199.9)	$	4,783.6
Building	2,790.3		896.7		(1,984.7)		1,702.3
Specialty Contractors	2,393.6		600.4		(1,134.2)		1,859.8
Total	$	11,221.1	$	2,443.4	$	(5,318.8)	$	8,345.7

_____________________________________________________________________________________________________________

(a)New awards consist of the original contract price of projects added to our backlog plus or minus subsequent changes to the estimated total contract price of existing contracts.

(b)Backlog may differ from the transaction prices allocated to the remaining performance obligations as disclosed in Note 3 of the Notes to Consolidated Financial Statements. Such differences relate to the timing of executing a formal contract or receiving a notice to proceed. More specifically, backlog sometimes may include awards for which a contract has not yet been executed or a notice to proceed has not been issued, but for which there are no remaining major uncertainties that we will proceed with our work on the project (e.g., adequate funding is in place).

Because the COVID-19 pandemic remains fluid and uncertain, the Company cannot assess the degree to which it might experience future adverse impacts. The general outlook for the Company’s growth over the next several years remains favorable, particularly in the Civil and Specialty Contractors segments, but the impact of the COVID-19 pandemic could continue to adversely affect future performance and operations, and the level of new work awarded. In addition, the Company’s growth could continue to be impacted by future project delays or the timing of project commencements, ramp-up activities and completions. We anticipate that we will continue to win our share of significant new awards resulting from long-term capital spending plans by state, local and federal customers, as well as limited competition for some of the largest project opportunities. In recent elections, voters in numerous states approved dozens of long-term transportation funding measures totaling approximately $200 billion in long-term funding. The largest of these were in Los Angeles County, where Measure M, a half-cent sales tax increase, was approved and is expected to generate $120 billion of funding over 40 years, and in Seattle, Washington, where Sound Transit 3 was passed and is expected to generate $54 billion of funding over 25 years. As state and local governments continue responding to the economic burdens attributable to the COVID-19 pandemic, they may delay or cancel planned infrastructure investments due to reduced revenues from income and sales taxes, fuel taxes and tolls. The extent of such effects, their duration, and how state and local governments will respond remains uncertain, just as the scope and duration of the COVID-19 pandemic remain uncertain. However, the COVID-19 pandemic’s dramatic impact on the U.S. economy has caused interest rates to remain at historically low levels, which may be conducive to continued, and potentially increased, spending on infrastructure projects.

There has long been strong, bipartisan support for infrastructure investments in the U.S. Given the lack of substantial federal infrastructure spending over the past two decades, there now appears to be a greater likelihood for additional federal financial assistance or stimulus programs directed toward assisting state and local governments in response to the COVID-19 pandemic and/or a federal program specifically targeting significant investments in infrastructure. Such additional federal financial assistance or stimulus programs could favorably impact the Company’s current work and prospective opportunities, though the timing and magnitude of such additional federal government actions, if any, remain uncertain.

While we anticipate continued revenue growth from our existing backlog of large civil infrastructure projects on the West Coast and other projects in Guam, certain large civil projects in the Northeast are completing or will be nearing completion over the next year. The Company is pursuing several large prospective projects on the West Coast, in the Northeast and in Guam that are expected to be bid and awarded in 2021 and 2022. However, revenue could decline in 2021 because the timing and magnitude of revenue contributions from these prospective projects may not be sufficient to offset revenue reductions associated with the projects that will be completed or nearing completion in 2021. In addition, as discussed earlier, the COVID-19 pandemic has resulted in, and could potentially continue to result in, delays in the bidding and awarding of certain projects the Company is pursuing, which could further delay large new revenue streams.

For a more detailed discussion of operating performance of each business segment, corporate general and administrative expenses and other items, see Results of Segment Operations, Corporate, Tax and Other Matters and Liquidity and Capital Resources below.

Non-GAAP Financial Measures

To supplement our consolidated financial statements presented under generally accepted accounting principles in the United States (“GAAP”), we are presenting certain non-GAAP financial measures. We are providing these non-GAAP financial measures to disclose additional information to facilitate the comparison of past and present operations, and they are among the

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indicators management uses as a basis for evaluating the Company’s financial performance as well as for forecasting future periods. We believe that these non-GAAP financial measures, when considered together with our GAAP financial results, provide management and investors with an additional understanding of our business operating results, including underlying trends.

These non-GAAP financial measures, which exclude the non-cash goodwill impairment charge incurred in 2019 (as well as the tax benefit associated with this charge), include adjusted income (loss) from construction operations, adjusted net income (loss) attributable to Tutor Perini Corporation, adjusted diluted earnings (loss) per common share and adjusted effective income tax rate. We also reference adjusted operating margin for each segment, which is a non-GAAP financial measure that we define as adjusted income (loss) from construction operations as a percentage of revenue. These non-GAAP financial measures are not intended to replace the presentation of our financial results in accordance with GAAP, and they may not be comparable to other similarly titled non-GAAP financial measures presented by other companies. Reconciliations of these non-GAAP financial measures to the most nearly comparable GAAP financial measures are presented below. There were no adjustments for 2020; therefore, the non-GAAP financial measures do not differ from GAAP results in that period.

Reconciliation of Non-GAAP Financial Measures

(in millions)	Civil		Building		Specialty Contractors		Corporate		Consolidated Total
Year Ended December 31, 2019
Income (loss) from construction operations, as reported	$	(150.9)	$	23.7	$	(172.6)	$	(65.2)	$	(365.0)
Plus: Goodwill impairment charge	210.2		13.5		156.2		—		379.9
Adjusted income (loss) from construction operations	$	59.3	$	37.2	$	(16.4)	$	(65.2)	$	14.9

	Year Ended December 31,
(in millions, except per common share amounts and percentages)	2020			2019
Net income (loss) attributable to Tutor Perini Corporation, as reported	$	108.4		$	(387.7)
Plus: Goodwill impairment charge	—			379.9
Less: Tax benefit provided on goodwill impairment charge	—			(49.4)
Adjusted net income (loss) attributable to Tutor Perini Corporation	$	108.4		$	(57.2)
Diluted earnings (loss) per common share, as reported	$	2.12		$	(7.72)
Plus: Goodwill impairment charge	—			7.56
Less: Tax benefit provided on goodwill impairment charge	—			(0.98)
Adjusted diluted earnings (loss) per common share	$	2.12		$	(1.14)
Effective income tax rate, as reported	12.6		%	15.4		%
Tax effect of goodwill impairment charge	—		%	19.9		%
Adjusted effective income tax rate	12.6		%	35.3		%

Results of Segment Operations

The results of our Civil, Building and Specialty Contractors segments are discussed below:

Civil Segment

Revenue, income (loss) from construction operations and adjusted income from construction operations for the Civil segment are summarized as follows:

	Year Ended December 31,
(in millions)	2020		2019
Revenue	$	2,199.9	$	1,779.4
Income (loss) from construction operations, as reported	245.8		(150.9)
Plus: Goodwill impairment charge	—		210.2
Adjusted income from construction operations	245.8		59.3

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Revenue for 2020 increased 24% compared to 2019. The revenue growth was primarily due to overall increased project execution activities on various mass-transit projects in California and Minnesota, as well as the absence of the prior-year revenue reduction associated with the adverse SR 99 jury verdict discussed in the section entitled Executive Overview. We estimate that the COVID-19 pandemic negatively impacted revenue by approximately $45 million in 2020, primarily due to the factors that affected operating results mentioned above in COVID-19 Update.

Income from construction operations was $245.8 million in 2020 compared to a loss from construction operations of $150.9 million in 2019. Excluding the impact of the goodwill impairment charge in 2019, adjusted income from construction operations was $59.3 million, reflecting an increase of 314% in 2020 compared to 2019. The increase was primarily driven by the volume growth mentioned above and improved performance on certain projects, as well as the absence of the prior-year SR 99-related charge ($155.8 million of the $166.8 million charge impacted the Civil segment in 2019). The increase was partially offset by the absence of a prior-year $37.8 million reduction in the segment's general and administrative expenses associated with the remeasurement gain that resulted from the Company increasing its ownership interest in a joint venture in 2019, as well as by an increase in non-cash amortization expense of $25.9 million in 2020, also related to that increased ownership interest. We estimate that the COVID-19 pandemic resulted in a negative impact of approximately $6 million on income from construction operations in 2020.

Operating margin was 11.2% for 2020 compared to operating margin of (8.5)% and adjusted operating margin of 3.3% in 2019. Adjusted operating margin excludes the impact of the 2019 goodwill impairment charge. The increase in adjusted operating margin for 2020 was primarily due to the factors discussed above that drove the increases in revenue and income from construction operations.

New awards in the Civil segment totaled $946 million in 2020 compared to $2.7 billion in 2019. The lower volume of new awards in 2020 compared to 2019 was primarily due to the COVID-19 pandemic, which resulted in delays in customers issuing bid solicitations and contract awards for certain planned projects. In addition, new awards in 2020 were negatively impacted by the timing of bids and awards for certain large prospective project opportunities, which the Company expects will occur in 2021 and 2022. New awards in 2020 included more than $732 million of additional funding for various mass-transit projects, the Company’s $121 million share of a joint-venture mass-transit project in Massachusetts, and a $64 million mining project in Alabama. The COVID-19 pandemic has resulted in significant revenue shortfalls for many state and local government agencies in 2020, and may continue to cause the deferrals or cancellations of certain new projects, depending on the allocation and prioritization of state and local funding, as well as the availability, timing and magnitude of anticipated supplemental funding from the federal government.

New awards in 2019 included the $1.4 billion Purple Line Section 3 Stations project and the $432 million Division 20 Portal Widening and Turnback Facility project, both in California; the $253 million Culver Line Communications-Based Train Control project in New York; and a $178 million military facilities project and a $122 million wastewater treatment project, both in Guam.

Backlog for the Civil segment was $4.8 billion as of December 31, 2020, a decrease of 21% compared to $6.0 billion as of December 31, 2019. The decrease was primarily due to strong revenue growth for the segment that exceeded the volume of new awards in 2020. The segment continues to experience strong demand reflected in a large, multi-year pipeline of prospective projects, substantial anticipated funding from various voter-approved transportation measures and public agencies’ long-term spending plans. The Civil segment is well-positioned to continue capturing its share of these prospective projects.

Building Segment

Revenue, income from construction operations and adjusted income from construction operations for the Building segment are summarized as follows:

	Year Ended December 31,
(in millions)	2020		2019
Revenue	$	1,984.6	$	1,742.0
Income from construction operations, as reported	53.2		23.7
Plus: Goodwill impairment charge	—		13.5
Adjusted income from construction operations	53.2		37.2

Revenue for 2020 increased 14% compared to 2019, primarily due to increased project execution activities on various projects in California and Oklahoma. The increase was partially offset by reduced activity on certain projects in California that are completed or nearing completion. Revenue grew in 2020 despite the estimated negative impact of the COVID-19 pandemic of approximately $190 million, primarily due to the factors that affected operating results mentioned above in COVID-19 Update.

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Income from construction operation in 2020 was $53.2 million compared to $23.7 million in 2019. Excluding the impact of the goodwill impairment charge in 2019, adjusted income from construction operations was $37.2 million, reflecting an increase of 43% in 2020 compared to 2019. The increase was principally driven by the factors mentioned above that drove the increases in revenue, as well as increased contributions from certain higher-margin projects in 2020. We estimate that the COVID-19 pandemic resulted in a negative impact of approximately $6 million in income from construction operations during 2020.

Operating margin was 2.7% in 2020 compared to operating margin of 1.4% and adjusted operating margin of 2.1% in 2019. Adjusted operating margin excludes the impact of the 2019 goodwill impairment charge. The increase in adjusted operating margin was driven by the factors mentioned above that drove the increases in revenue and income from construction operations.

New awards in the Building segment totaled $897 million in 2020 compared to $2.2 billion in 2019, as the COVID-19 pandemic negatively impacted demand in certain end markets and, correspondingly, the timing of bids and contract awards for certain planned projects. New awards in 2020 included approximately $615 million for various building projects in California and $271 million for several government facilities projects nationwide. The COVID-19 pandemic could continue to result in delayed project opportunities.

New awards in 2019 included the Choctaw Casino and Resort project in Oklahoma; a large hospitality and gaming project in California; a $263 million courthouse project in Florida; a technology campus tenant improvement project in California valued at more than $200 million; and the $200 million Southland Gaming Casino and Hotel project in Arkansas.

Backlog for the Building segment was $1.7 billion as of December 31, 2020, a decrease of 39% compared to $2.8 billion as of December 31, 2019. The decrease was driven by revenue growth for the segment that exceeded the volume of new awards in 2020. The Building segment continues to have a large volume of prospective projects across various end markets and geographic locations. Barring any further adverse impacts from the COVID-19 pandemic, demand for our building construction services is expected to continue due to ongoing customer spending supported by a historically low interest rate environment.

Specialty Contractors Segment

Revenue, income (loss) from construction operations and adjusted income (loss) from construction operations for the Specialty Contractors segment are summarized as follows:

	Year Ended December 31,
(in millions)	2020		2019
Revenue	$	1,134.2	$	929.4
Income (loss) from construction operations, as reported	17.2		(172.6)
Plus: Goodwill impairment charge	—		156.2
Adjusted income (loss) from construction operations	17.2		(16.4)

Revenue for 2020 increased 22% compared to 2019. The growth was principally due to increased project execution activities on certain mechanical and electrical projects in the Northeast and California. We estimate that the COVID-19 pandemic negatively impacted revenue in 2020 by approximately $55 million, primarily due to the factors that affected operating results mentioned above in COVID-19 Update.

Income from construction operations in 2020 was $17.2 million compared to a loss from construction operations of $172.6 million in 2019. Excluding the impact of the goodwill impairment charge in 2019, adjusted loss from construction operations was $16.4 million. Income from construction operations increased substantially in 2020 compared to the adjusted loss from construction operations in 2019, primarily due to the increased volume mentioned above and a gain of $25.7 million as a result of a favorable arbitration decision and subsequent settlement of the related employment dispute. The increase was also due to the absence of prior-year net unfavorable adjustments on certain electrical and mechanical projects in New York that totaled $41.5 million, none of which were individually material, and the absence of the prior-year SR 99-related charge ($11.0 million of which impacted the Specialty Contractors segment). The increase in 2020 was partially offset by various net unfavorable adjustments to project forecasts that totaled $29.8 million, none of which were individually material; a charge of $15.2 million due to an unfavorable legal ruling pertaining to a mechanical project in California; a charge of $13.2 million due to an adverse arbitration ruling on an electrical project in New York; and the estimated negative impact of the COVID-19 pandemic of approximately $9 million.

Operating margin was 1.5% in 2020 compared to operating margin of (18.6)% and adjusted operating margin of (1.8)% in 2019. Adjusted operating margin excludes the impact of the 2019 goodwill impairment charge. The changes in adjusted operating margin for both periods were mainly attributable to the aforementioned factors that drove the changes in revenue and adjusted income (loss) from construction operations.

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New awards in the Specialty Contractors segment totaled $600 million in 2020 compared to $1.5 billion in 2019, as the COVID-19 pandemic resulted in, and could continue to result in, reduced demand from certain commercial and government customers that have experienced funding constraints. New awards in 2020 included $286 million for various electrical projects in Texas, California and Florida, and $158 million for various electrical projects in New York.

New awards in 2019 included, among others, electrical and mechanical subcontracts valued at $216 million for the Purple Line Section 3 Stations project and an electrical subcontract valued at $140 million for the Division 20 Portal Widening and Turnback Facility project, both in California; and three mechanical projects collectively valued at $192 million and an electrical subcontract valued at $140 million for a mass-transit project, all in New York.

Backlog for the Specialty Contractors segment was $1.9 billion as of December 31, 2020, a decrease of 22% compared to $2.4 billion as of December 31, 2019. The decrease was primarily due to strong revenue growth for the segment that exceeded the volume of new awards in 2020. The Specialty Contractors segment continues to be increasingly focused on servicing the Company’s backlog of large Civil and Building segment projects, but also remains well-positioned to capture its share of new projects for external customers, leveraging the size and scale of our business units that operate in New York, Texas, Florida and California and the strong reputation held by these business units for high-quality work on large, complex projects.

Corporate, Tax and Other Matters

Corporate General and Administrative Expenses

Corporate general and administrative expenses were $53.9 million in 2020 compared to $65.5 million in 2019. The decrease in corporate general and administrative expenses in 2020 was predominantly due to lower share-based compensation expense, lower outside professional fees, and reduced travel expenses due to the COVID-19 pandemic.

Other Income (Expense), Interest Expense and Income Tax (Expense) Benefit

	Year Ended December 31,
(in millions)	2020		2019
Other income (expense)	$	(11.9)	$	6.7
Interest expense	(76.2)		(67.5)
Income tax (expense) benefit	(21.9)		65.6

Other income (expense) for 2020 was a net expense of $11.9 million compared to net other income of $6.7 million for 2019. The net expense in 2020 was primarily due to charges related to the unfavorable resolutions of certain disputes pertaining to past business acquisitions, which were not material individually or in the aggregate, while the net other income in 2019 was primarily related to a net gain on the sale of property and equipment. The COVID-19 pandemic caused the cancellation of a transaction to sell an office building that would have resulted in other income of approximately $8 million in 2020.

Interest expense increased $8.7 million in 2020 compared to 2019, almost entirely due to non-cash extinguishment costs that resulted from our debt restructuring transactions in August 2020.

The provision for income taxes was $21.9 million for 2020 compared to an income tax benefit of $65.6 million for 2019. The effective income tax rate was 12.6% for 2020 compared to 15.4% for 2019. The effective income tax rate for 2020 primarily reflects the favorable tax rate differential realized on the 2019 net operating loss (“NOL”) carryback and earnings attributable to noncontrolling interests for which income taxes are not the responsibility of the Company. Under the CARES Act, enacted on March 27, 2020, the NOL generated in 2019 may be carried back up to five years, whereas under previous rules NOLs were only allowed to be carried forward. This allowed the Company to realize the benefit of the tax rate differential by carrying back the NOL to tax years when the federal statutory tax rate was 35% rather than the current rate of 21%. These benefits to the effective tax rate were partially offset by state income taxes.

During 2019, the Company recognized a tax benefit of $65.6 million on a loss before income taxes of $425.8 million. As a result of the $379.9 million goodwill impairment charge discussed above, the Company recognized a tax benefit totaling $49.4 million. Approximately $209.5 million of the charge was not deductible for income tax purposes, which significantly reduced the tax benefit and effective income tax rate for 2019. As discussed above, the effective income tax rate for 2019 was 15.4%. The adjusted effective income tax rate for 2019, which excludes the tax benefit from the goodwill impairment charge and which is a non-GAAP financial measure, was 35.3%. The adjusted effective income tax rate for 2019 was higher than the U.S. federal statutory rate primarily due to earnings attributable to noncontrolling interests for which income taxes are not the responsibility

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of the Company, which increased the effective rate due to the pre-tax loss for the period, U.S. federal research and development tax credits, and state income taxes, partially offset by foreign tax impacts.

Liquidity and Capital Resources

Liquidity is provided by available cash and cash equivalents, cash generated from operations, credit facilities and access to capital markets. On August 18, 2020, the Company entered into a new credit agreement that provides for a term loan B facility and a revolving credit facility. We used the net proceeds to repay all borrowings under our 2017 Credit Facility and repurchase a majority of our Convertible Notes, with the remaining notes outstanding to be repaid from cash restricted for such purpose. Under the new credit agreement, we have a committed line of credit totaling $175 million, with sublimits for the issuance of letters of credit and swing line loans up to the aggregate amounts of $75.0 million and $10.0 million, respectively, which may be used for revolving loans, letters of credit and/or general purposes. We believe that cash generated from operations, along with our unused credit capacity of $175 million and available cash balances as of December 31, 2020, will be sufficient to fund any working capital needs and debt maturities for the next 12 months, provided that we are not adversely impacted by unanticipated future events, including a material increase in the negative impact of the COVID-19 pandemic as discussed above in COVID-19 Update. For a discussion of our new credit agreement and other debt transactions, see the section entitled Debt below.

Cash and Working Capital

Cash and cash equivalents were $374.3 million as of December 31, 2020 compared to $193.7 million as of December 31, 2019. Cash immediately available for general corporate purposes was $210.8 million and $43.8 million as of December 31, 2020 and 2019, respectively, with the remainder being amounts held by our consolidated joint ventures and also our proportionate share of cash held by our unconsolidated joint ventures. Cash held by our joint ventures was available only for joint venture-related uses, including distributions to joint venture partners. In addition, our restricted cash and restricted investments totaled $156.5 million as of December 31, 2020 compared to $79.4 million as of December 31, 2019. Restricted cash and restricted investments are primarily held to secure insurance-related contingent obligations. Our restricted cash as of December 31, 2020 also included $69.9 million of cash held to repay the outstanding principal balance of the Convertible Notes.

During the year ended December 31, 2020, net cash provided by operating activities was $172.8 million (which is a new record high for any year since the 2008 merger of Tutor-Saliba and Perini), due primarily to cash generated from earnings sources, partially offset by investment in working capital. The increase in working capital for the year ended December 31, 2020 primarily reflects an increase in costs and estimated earnings in excess of billings and an increase in accounts receivable due to timing of collections, partially offset by an increase in accounts payable due to timing of payments to suppliers and subcontractors. The increase in costs and estimated earnings in excess of billings was driven in part by impacts of the COVID-19 pandemic, which caused delays in the negotiation and resolution of certain claims and unapproved change orders (due to the postponement of certain legal and arbitration proceedings, as well as deferments of certain settlement discussions) and constrained customers’ revenue and funding sources, thereby limiting their budgetary discretion to pay the Company for changes approved in scope but for which pricing is pending. During the year ended December 31, 2019, net cash provided by operating activities was $136.5 million, due primarily to changes in net investment in working capital and cash generated from income sources. Those changes in working capital primarily reflected an increase in billings in excess of costs and estimated earnings (“BIE”), partially offset by increases in accounts receivable and retainage receivable.

The $36.2 million increase in cash provided by operating activities when comparing 2020 with 2019 primarily reflects the significant increase in cash from earnings sources, partially offset by an increase in investment in working capital principally due to a smaller increase in BIE.

During 2020 and 2019, we used $46.4 million and $76.1 million of cash from investing activities, respectively. The net cash used in investing activities for 2020 and 2019 was primarily due to the acquisition of property and equipment for projects, which totaled $54.8 million and $84.2 million, respectively. The majority of our capital expenditures for both years was for project-specific equipment purchased by our joint ventures and funded directly by our customers.

During 2020, net cash provided by financing activities was $123.3 million, which was primarily driven by increased net borrowings of $181.4 million, partially offset by $48.5 million of cash distributions to noncontrolling interests and debt issuance costs of $11.2 million. During 2019, we generated $21.8 million of cash from financing activities principally due to increased net borrowings of $61.3 million and contributions from noncontrolling interests of $9.8 million, partially offset by distributions to noncontrolling interests of $46.5 million.

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As of December 31, 2020, we had working capital of $1.8 billion, a ratio of current assets to current liabilities of 1.80 and a ratio of debt to equity of 0.66 compared to working capital of $1.4 billion, a ratio of current assets to current liabilities of 1.66 and a ratio of debt to equity of 0.58 at December 31, 2019.

Debt

Summarized below are the key terms of our debt as of December 31, 2020. For additional information, refer to Note 7 of the Notes to Consolidated Financial Statements, as applicable.

2020 Credit Agreement

On August 18, 2020, the Company entered into a new credit agreement (the “2020 Credit Agreement”) with BMO Harris Bank N.A., as Administrative Agent, Swing Line Lender and L/C Issuer and other lenders. The 2020 Credit Agreement provides for a $425.0 million term loan B facility (the “Term Loan B”) and a $175.0 million revolving credit facility (the “2020 Revolver”), with sublimits for the issuance of letters of credit and swing line loans up to the aggregate amounts of $75.0 million and $10.0 million, respectively. The Term Loan B will mature on August 18, 2027 and the 2020 Revolver will mature on August 18, 2025, in each case, unless any of the 2017 Senior Notes are outstanding on January 30, 2025 (which is 91 days prior to the maturity of the 2017 Senior Notes), in which case, both the Term Loan B and the 2020 Revolver will mature on January 30, 2025 (subject to certain further exceptions). For more information regarding the terms of our 2020 Credit Agreement, refer to Note 7 of the Notes to Consolidated Financial Statements.

The table below presents our actual and required first lien net leverage ratio under the 2020 Credit Agreement for the period, which is calculated on a rolling four-quarter basis:

	Trailing Four Fiscal Quarters Ended
	December 31, 2020
	Actual	Required
First lien net leverage ratio	0.69 to 1.00	< or = 2.75 : 1.00

As of December 31, 2020, we were in compliance and expect to continue to be in compliance with the covenants under the 2020 Credit Agreement.

Termination of 2017 Credit Facility and Repurchase of Convertible Notes

On April 20, 2017, the Company entered into a credit agreement (the “2017 Credit Facility”) with SunTrust Bank, now known as Truist Bank, as Administrative Agent, Swing Line Lender and L/C Issuer and a syndicate of other lenders. The 2017 Credit Facility provided for a $350 million revolving credit facility and a sublimit for the issuance of letters of credit and swing line loans up to the aggregate amount of $150 million and $10 million, respectively, both maturing on April 20, 2022 unless any of the Convertible Notes, as defined below, were outstanding on December 17, 2020, in which case all such borrowings would have matured on December 17, 2020 (the “spring-forward provision”).

On August 18, 2020, the Company used proceeds from the Term Loan B to repay outstanding amounts under its 2017 Credit Facility. As a result of repaying the outstanding amounts under the 2017 Credit Facility and entering into the 2020 Credit Agreement, the Company terminated the 2017 Credit Facility, including its spring-forward provision that would have accelerated the maturity of the facility to December 17, 2020.

On June 15, 2016, the Company issued $200 million of 2.875% Convertible Senior Notes due June 15, 2021 (the “Convertible Notes”) in a private placement offering. On August 19, 2020, the Company used proceeds from the Term Loan B to repurchase $130.1 million aggregate principal amount of its Convertible Notes for an aggregate purchase price of $132.4 million (including accrued and unpaid interest to the repurchase date). At December 31, 2020, $69.9 million ($67.9 million net of unamortized discount and debt issuance costs) remain outstanding and are included in “Current maturities of long-term debt” on the Consolidated Balance Sheet. The Company will repurchase or retire at or before maturity the remaining Convertible Notes and repay the principal balance using available proceeds from the Term Loan B, which are currently held in a restricted cash account for such purpose.

The Convertible Notes are unsecured obligations of the Company and do not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company. The Convertible Notes bear interest at a rate of 2.875% per year, payable in cash semi-annually in June and December. Upon conversion, and at the Company’s election, the Company may satisfy its conversion obligation with cash, shares of its common stock or a combination thereof. As of December 31, 2020, the conversion provisions of the Convertible Notes have not been triggered.

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2017 Senior Notes

On April 20, 2017, the Company issued $500 million in aggregate principal amount of 6.875% Senior Notes due May 1, 2025 (the “2017 Senior Notes”) in a private placement offering. Interest on the 2017 Senior Notes is payable in arrears semi-annually in May and November of each year, beginning in November 2017.

Equipment Financing and Mortgages

The Company has certain loans entered into for the purchase of specific property, plant and equipment and secured by the assets purchased. The aggregate balance of equipment financing loans was approximately $36.9 million and $27.7 million at December 31, 2020 and 2019, respectively, with interest rates ranging from 2.74% to 3.89% with equal monthly installment payments over periods up to seven years with balloon payments of $12.4 million in 2021 and $6.3 million in 2022. The aggregate balance of mortgage loans was approximately $10.7 million and $11.5 million at December 31, 2020 and 2019, respectively, with interest rates ranging from LIBOR plus 3% to a fixed 3.50% and equal monthly installment payments over periods up to 10 years with balloon payments of $2.9 million in 2021 and $6.8 million in 2023.

Contractual Obligations

Our outstanding contractual obligations as of December 31, 2020 are summarized in the following table:

			Payments Due
(in thousands)	Total		Less than 1 year		1-3 years		3-5 years		More than 5 years
Debt(a)	$	1,047,714	$	102,228	$	29,104	$	513,654	$	402,728
Interest on debt(a)	313,225		61,293		118,409		93,599		39,924
Operating leases	107,891		12,512		18,251		11,495		65,633
Pension benefit payments(b)	5,263		4,265		998		—		—
Other	10,937		1,504		752		—		8,681
Total	$	1,485,030	$	181,802	$	167,514	$	618,748	$	516,966

_____________________________________________________________________________________________________________

(a)Debt and interest on debt exclude unamortized debt discounts and deferred debt issuance costs. Amounts for interest on debt are based on interest rates in effect as of December 31, 2020.

(b)The Company utilizes current actuarial assumptions in determining the expected minimum contributions to fund our defined benefit pension and other post-retirement plans. Estimated contributions for periods beyond the scope of the actuarial assumptions have not been included because, in management’s judgment, such estimates may not be reliable.

Off-Balance Sheet Arrangements

None.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations is based upon our Consolidated Financial Statements, which have been prepared in accordance with GAAP. Our significant accounting policies are described in Note 1 of the Notes to Consolidated Financial Statements. The preparation of the Consolidated Financial Statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Estimates are based on information available through the date of the issuance of the financial statements; accordingly, actual results in future periods could differ from these estimates. Effective January 1, 2018, the Company adopted Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers (“ASC 606”). See Note 1(d), Note 3 and Note 4 of the Notes to Consolidated Financial Statements for more information. Significant judgments and estimates used in the preparation of the Consolidated Financial Statements apply to the following critical accounting policies:

Method of Accounting for Contracts — Contract revenue is recognized over time using the cost-to-cost method which measures progress towards completion based on the ratio of contract costs incurred to date compared to total estimated costs for each performance obligation. The estimates used in accounting for contracts with customers require judgment and assumptions regarding both future events and the evaluation of contingencies such as the impact of change orders, liability claims, other contract disputes, the achievement of contractual performance standards and potential variances in project schedule and costs. Changes to the total estimated contract cost, either due to unexpected events or revisions to management’s initial estimates, for a given project are recognized in the period in which they are determined.

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In certain instances, we provide guaranteed completion dates and/or achievement of other performance criteria. Failure to meet schedule or performance guarantees could result in unrealized incentive fees and/or liquidated damages. In addition, depending on the type of contract, unexpected increases in contract cost may be unrecoverable, resulting in total cost exceeding revenue realized from the projects. The Company generally provides limited warranties for work performed, with warranty periods typically extending for a limited duration following substantial completion of the Company’s work on a project. Historically, warranty claims have not resulted in material costs incurred.

Claims arising from construction contracts have been made against the Company by customers, and the Company has made claims against customers for costs incurred in excess of current contract provisions. The Company recognizes revenue for claims as variable consideration in accordance with ASC 606. Assumptions as to the occurrence of future events and the likelihood and amount of variable consideration are made during the contract performance period. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of anticipated performance and all information (historical, current and forecasted) that is reasonably available to management. Estimated amounts are only included in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Back charges to suppliers or subcontractors are recognized as a reduction of cost when it is determined that recovery of such cost is probable and the amounts can be reliably estimated. Disputed back charges are recognized when the same requirements described above for variable consideration have been satisfied.

Construction Joint Ventures — Certain contracts are executed through joint ventures. The arrangements are often formed for the execution of single contracts or projects and allow the Company to share risks and secure specialty skills required for project execution.

In accordance with ASC 810, Consolidation (“ASC 810”) the Company assesses its joint ventures at inception to determine if any meet the qualifications of a variable interest entity (“VIE”). The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether the joint venture is a VIE.

The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. When the Company is determined to be the primary beneficiary, the VIE is consolidated. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

For construction joint ventures that do not need to be fully consolidated, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. Intercompany balances and transactions are eliminated. See Note 1(b) and Note 13 of the Notes to Consolidated Financial Statements for additional discussion regarding VIEs.

Recoverability of Goodwill — Goodwill represents the excess of amounts paid over the fair value of net assets acquired from an acquisition. In order to determine the amount of goodwill resulting from an acquisition, we perform an assessment to determine the value of the acquired company's tangible and identifiable intangible assets and liabilities. In our assessment, we determine whether identifiable intangible assets exist, which typically include backlog, customer relationships and trade names.

We test goodwill for impairment annually as of October 1 of each year. This test requires us to estimate the fair value of each reporting unit carrying goodwill using income and market approaches, and to compare the calculated fair value of each reporting unit to its carrying value, which is equal to the reporting unit’s net assets. If the calculated fair value of a reporting unit is less than its carrying value, we recognize an impairment charge equal to the difference.

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The impairment evaluation process requires assumptions that are subject to a high degree of judgment such as revenue growth rates, profitability levels, discount rates, industry market multiples and weighted-average cost of capital. Changes in these assumptions would impact the results of our impairment tests.

During interim periods, including those subsequent to the Company’s October 1 annual test date, we evaluate events and circumstances, including, but not limited to, an examination of macroeconomic conditions, cost factors, overall financial performance by each reporting unit, other relevant entity-specific events, and trends in the stock prices of our Company and peers to determine if such factors indicate that it is likely that the goodwill for one or more of our reporting units is impaired, thus warranting the performance of a quantitative impairment test sooner than the fourth quarter of the year. The Company performed an interim impairment test as of June 1, 2019 and recognized a non-cash impairment loss totaling $379.9 million, which eliminated the carrying value of goodwill for the Building and Specialty Contractors reporting units. See Note 1(g) and Note 6 of the Notes to Consolidated Financial Statements.

During the fourth quarter of 2020, we conducted our annual goodwill impairment test and determined that goodwill was not impaired since the estimated fair value of the Civil reporting unit exceeded its net book value by a significant amount. As such, there is a risk of goodwill impairment if future events are less favorable than what we assumed or estimated in our impairment analysis.

The Company has considered relevant events and circumstances since the annual goodwill impairment test, including, but not limited to, an examination of macroeconomic conditions, industry and market conditions, impacts from the COVID-19 pandemic, cost factors, overall financial performance by each reporting unit, other relevant entity-specific events, and trends in the stock prices of the Company and its peers. In considering the totality of qualitative factors known as of the reporting date, we determined that no triggering events occurred or circumstances changed since our October 1, 2020 annual test that would more likely than not reduce the fair value of the Civil reporting unit below its carrying amount. We will continue to monitor events occurring or circumstances changing which may suggest that goodwill should be reevaluated. These events and circumstances include, but are not limited to, changes in the overall financial performance of the Civil reporting unit, impacts to our business as a result of the COVID-19 pandemic, as well as other quantitative and qualitative factors specific to the Civil reporting unit which indicate potential triggering events that would more likely than not reduce the fair value of the Civil reporting unit below its carrying amount.

New Accounting Pronouncements — For discussion of recently adopted accounting standards and updates, see Note 1 of the Notes to Consolidated Financial Statements.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We do not enter into derivative financial instruments for trading, speculation or other purposes that would expose the Company to market risk. In the normal course of business, our results of operations are exposed to certain market risks, primarily associated with fluctuations in interest rates. Borrowings under our 2020 Credit Agreement and certain other debt obligations have variable interest rates subject to interest rate risk. See Note 7 of the Notes to Consolidated Financial Statements for further discussion of our 2020 Credit Agreement. We had approximately $431.5 million and $121.9 million of borrowings with variable interest rates as of December 31, 2020 and 2019, respectively. If short-term floating interest rates on these borrowings were to change by 0.50% and our variable indebtedness were to remain unchanged, interest expense would increase or decrease by approximately $2.2 million for the next twelve months.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The Report of Independent Registered Public Accounting Firm and Consolidated Financial Statements are set forth in Item 15 in this Annual Report on Form 10-K and are incorporated herein by reference.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures — An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as defined by Rule 13a-15(e) under the Exchange Act, as of December 31, 2020 was made under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of December 31, 2020, our disclosure controls and procedures were effective, in that they provide reasonable assurance that

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information required to be disclosed in our reports filed or submitted under the Exchange Act were recorded, processed, summarized and reported within the time periods specified in the SEC’s rules. Our disclosure controls and procedures are designed to ensure that information we are required to disclose in such reports is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Management’s Report on Internal Control over Financial Reporting — Our management, under the supervision of our Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining an adequate system of internal control over financial reporting as such term is defined in Exchange Act Rules 13a-15(f). In designing and evaluating our system of internal control over financial reporting, we recognize that inherent limitations exist in any control system no matter how well designed and operated, and we can only provide reasonable, not absolute, assurance of achieving the desired control objectives. In making this assessment, management utilized the criteria issued in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, management concluded that, as of December 31, 2020, our internal control over financial reporting was effective based on those criteria.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. In addition, projections of any evaluation of the effectiveness to future periods are subject to the risk that controls may become inadequate due to changes in conditions, or that the degree of compliance with policies and procedures may deteriorate.

Deloitte & Touche LLP, the independent registered public accounting firm that audited our consolidated financial statements included in this Annual Report on Form 10-K, has issued an attestation report on the Company’s internal control over financial reporting as of December 31, 2020.

Changes in Internal Control over Financial Reporting — There were no changes in our internal control over financial reporting for the quarter ended December 31, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Tutor Perini Corporation

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Tutor Perini Corporation and subsidiaries (the “Company”) as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2020, of the Company and our report dated February 24, 2021, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Los Angeles, CA

February 24, 2021

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ITEM 9B. OTHER INFORMATION

None.

PART III.

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item 10 is hereby incorporated by reference from our definitive proxy statement to be filed within 120 days after the end of 2020.

We have adopted a Code of Business Conduct and Ethics that applies to all of our directors, officers and employees, including our principal executive, principal financial and principal accounting officers. Our Code of Business Conduct and Ethics is posted on our website located at http://investors.tutorperini.com/corporate-governance/overview/default.aspx. We intend to disclose future amendments to certain provisions of the Code of Business Conduct and Ethics, and waivers of the Code of Business Conduct and Ethics granted to executive officers and directors, on the website within four business days following the date of the amendment or waiver.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this Item 11 is hereby incorporated by reference from our definitive proxy statement to be filed within 120 days after the end of 2020.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by this Item 12 is hereby incorporated by reference from our definitive proxy statement to be filed within 120 days after the end of 2020.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this Item 13 is hereby incorporated by reference from our definitive proxy statement to be filed within 120 days after the end of 2020.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item 14 is hereby incorporated by reference from our definitive proxy statement to be filed within 120 days after the end of 2020.

PART IV.

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Tutor Perini Corporation and Subsidiaries

(a) List of Documents Filed as a Part of This Report.

1.           Financial Statements:

Our Consolidated Financial Statements as of December 31, 2020 and 2019 and for each of the three years in the period ended December 31, 2020 and the Notes thereto, together with the Report of Independent Registered Public Accounting Firm on those Consolidated Financial Statements are hereby filed as part of this Annual Report on Form 10-K, beginning on page F-1.

2.           Financial Statement Schedules:

All consolidated financial statement schedules are omitted because of the absence of the conditions under which they are required or because the required information is included in the Consolidated Financial Statements and in the Notes thereto.

3.           Exhibits:

See exhibits listed under Part (b) below.

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(b) Exhibits.

EXHIBIT INDEX

The following designated exhibits are, as indicated below, either filed herewith or have heretofore been filed with the SEC under the Securities Act or the Exchange Act and are referred to and incorporated herein by reference to such filings.

Exhibit 3.	Articles of Incorporation and By-laws
3.1	Amended and Restated Articles of Organization of Tutor Perini Corporation, as filed with the Secretary of the Commonwealth of Massachusetts on July 8, 2020 (incorporated by reference to Exhibit 3.1 to Form 10-Q filed on July 29, 2020).
3.2	Third Amended and Restated By-laws of Tutor Perini Corporation (incorporated by reference to Exhibit 3.5 to Form 10-Q filed on August 2, 2016).
Exhibit 4.	Instruments Defining the Rights of Security Holders, Including Indentures
4.1	Shareholders Agreement, dated April 2, 2008, by and among Tutor Perini Corporation, Ronald N. Tutor and the shareholders of Tutor-Saliba Corporation signatory thereto (incorporated by reference to Exhibit 4.1 to Form 8-K filed on April 7, 2008).
4.2	Amendment No. 1 to the Shareholders Agreement, dated September 17, 2010, by and between Tutor Perini Corporation and Ronald N. Tutor, as shareholder representative (incorporated by reference to Exhibit 4.1 to Form 8-K filed on September 20, 2010).
4.3	Amendment No. 2 to the Shareholders Agreement, dated June 2, 2011, by and between Tutor Perini Corporation and Ronald N. Tutor, as shareholder representative (incorporated by reference to Exhibit 4.1 to Form 8-K filed on June 6, 2011).
4.4	Amendment No. 3 to the Shareholders Agreement, dated September 13, 2011, by and between Tutor Perini Corporation and Ronald N. Tutor, as shareholder representative (incorporated by reference to Exhibit 4.1 to Form 8-K filed on September 16, 2011).
4.5	Indenture, dated June 15, 2016, by and between Tutor Perini Corporation and Wilmington Trust, National Association (incorporated by reference to Exhibit 4.1 to Form 8-K filed on June 16, 2016).
4.6	Indenture, dated April 20, 2017, among Tutor Perini Corporation, the guarantors named therein and Wilmington Trust, National Association, as trustee (incorporated by reference to Exhibit 4.1 to Form 8-K filed on April 25, 2017).
4.7	Description of Securities.
Exhibit 10.	Material Contracts
10.1*	Form of Director and Officer Indemnification Agreement (incorporated by reference to Exhibit 10.19 to Amendment No. 1 to Form S-1 (File No. 333-111338) filed on February 10, 2004).
10.2*	2009 General Incentive Compensation Plan (incorporated by reference to Annex B to the Company’s Definitive Proxy Statement on Schedule 14A filed on April 17, 2009).
10.3*	Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan (as amended on October 2, 2014) (incorporated by reference to Exhibit A to the Company’s Definitive Proxy Statement on Schedule 14A filed on October 2, 2014).
10.4*	Tutor Perini Corporation Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to Form 8-K filed on May 26, 2017).
10.5*	Tutor Perini Corporation Omnibus Incentive Plan (incorporated by reference to Exhibit 10.1 to Form 8-K filed on May 25, 2018).
10.6*	Amended and Restated Employment Agreement, dated December 22, 2014, by and between Tutor Perini Corporation and Ronald N. Tutor (incorporated by reference to Exhibit 10.1 to Form 8-K filed on December 24, 2014).
10.7*	Amendment No. 1 to Amended and Restated Employment Agreement, dated January 5, 2018, by and between Tutor Perini Corporation and Ronald N. Tutor (incorporated by reference to Exhibit 10.1 to Form 8-K filed on January 8, 2018).
10.8	Commercial Lease Agreement, dated April 18, 2014, by and among Tutor Perini Corporation and Ronald N. Tutor (incorporated by reference to Exhibit 10.1 to Form 10-Q filed on May 7, 2014).
10.9	Fontana Property Lease Agreement, dated April 18, 2014, by and among Tutor Perini Corporation and Kristra Investments, Ltd. (incorporated by reference to Exhibit 10.2 to Form 10-Q filed on May 7, 2014).
10.10	Assignment and Assumption Agreement, dated January 15, 2015, by and among Ronald N. Tutor and the Ronald N. Tutor Separate Property Trust (incorporated by reference to Exhibit 10.1 to Form 10-Q filed on November 4, 2020).
10.11	Assignment and Assumption Agreement, dated March 3, 2015, by and among the Ronald N. Tutor Separate Property Trust and Kristra Investments, Ltd. (incorporated by reference to Exhibit 10.2 to Form 10-Q filed on November 4, 2020).

35

10.12	First Amendment to Commercial Lease Agreement, dated October 7, 2020, by and among Tutor Perini Corporation and Aliaron Investments, Ltd. (incorporated by reference to Exhibit 10.3 to Form 10-Q filed on November 4, 2020).
10.13	First Amendment to Fontana Property Lease Agreement, dated October 7, 2020, by and among Tutor Perini Corporation and Aliaron Investments, Ltd. (incorporated by reference to Exhibit 10.4 to Form 10-Q filed on November 4, 2020).
10.14	Second Amendment to Commercial Lease Agreement, dated December 28, 2020, by and among Tutor Perini Corporation and Aliaron Investments, Ltd.
10.15	Second Amendment to Fontana Property Lease Agreement, dated December 28, 2020, by and among Tutor Perini Corporation and Aliaron Investments, Ltd.
10.16	Third Amendment to Commercial Lease Agreement, dated February 19, 2021, by and among Tutor Perini Corporation and Aliaron Investments, Ltd.
10.17	Third Amendment to Fontana Property Lease Agreement, dated February 19, 2021, by and among Tutor Perini Corporation and Aliaron Investments, Ltd.
10.18*	Amended and Restated Employment Agreement, dated November 1, 2016, by and between James A. Frost and Tutor Perini Corporation (incorporated by reference to Exhibit 10.1 to Form 10-Q filed on November 2, 2016).
10.19*	Employment Agreement, dated September 6, 2017, by and between Tutor Perini Corporation and Gary G. Smalley (incorporated by reference to Exhibit 10.1 to Form 8-K filed on September 8, 2017).
10.20*	Employment Offer Letter, dated June 12, 2018, by and between Tutor Perini Corporation and Wendy A. Hallgren (incorporated by reference to Exhibit 10.1 to Form 10-Q filed on November 7, 2018).
10.21*	Separation Benefits Agreement, dated September 17, 2019, by and between Tutor Perini Corporation and Wendy A. Hallgren (incorporated by reference to Exhibit 10.1 to Form 8-K filed on September 20, 2019).
10.22*	Employment Offer Letter, dated July 19, 2019, by and between Tutor Perini Corporation and Jean J. Abiassi (incorporated by reference to Exhibit 10.1 to Form 10-Q filed on May 6, 2020).
10.23*	Form of Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.2 to Form 10-Q filed on November 6, 2019).
10.24*	Form of Restricted Stock Unit Award Agreement with Guarantee (incorporated by reference to Exhibit 10.3 to Form 10-Q filed on November 6, 2019).
10.25*	Form of Stock Option Agreement (incorporated by reference to Exhibit 10.4 to Form 10-Q filed on November 6, 2019).
10.26	Credit Agreement, dated as of August 18, 2020, among Tutor Perini Corporation, BMO Harris Bank N.A., as Administrative Agent, Swing Line Lender and L/C Issuer and the other lenders party thereto (incorporated by reference to Exhibit 10.1 to Form 8-K filed on August 19, 2020).
Exhibit 21	Subsidiaries of Tutor Perini Corporation.
Exhibit 23	Consent of Independent Registered Public Accounting Firm.
Exhibit 24	Power of Attorney executed by members of the Company’s Board of Directors allowing Management to sign the Company’s Form 10-K on their behalf.
Exhibit 31.1	Certification of Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Exhibit 31.2	Certification of Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Exhibit 32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Exhibit 32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Exhibit 95	Mine Safety Disclosure.
Exhibit 101.INS	Inline XBRL Instance Document – The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
Exhibit 101.SCH	Inline XBRL Taxonomy Extension Schema Document.
Exhibit 101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
Exhibit 101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.
Exhibit 101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
Exhibit 101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.
Exhibit 104	Cover Page Interactive Data File - The cover page from the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, formatted in Inline XBRL (included as Exhibit 101).

_____________________________________________________________________________________________________________

*    Management contract or compensatory plan or arrangement

36

ITEM 16. FORM 10-K SUMMARY

None.

37

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Tutor Perini Corporation
	(Registrant)
Date: February 24, 2021	By:	/s/ Gary G. Smalley
	Gary G. Smalley
	Executive Vice President and Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
= Principal Executive Officer and Director
/s/ Ronald N. Tutor
Ronald N. Tutor	Chairman and Chief Executive Officer	February 24, 2021
= Principal Financial Officer
/s/ Gary G. Smalley
Gary G. Smalley	Executive Vice President and Chief Financial Officer	February 24, 2021
= Principal Accounting Officer
/s/ Ryan J. Soroka
Ryan J. Soroka	Vice President and Chief Accounting Officer	February 24, 2021

= Other Directors
Peter Arkley	)
Sidney J. Feltenstein	)
James A. Frost	)
Michael F. Horodniceanu	)	/s/ Gary G. Smalley
Michael R. Klein	)	Gary G. Smalley
Robert C. Lieber	)	Attorney in Fact
Dennis D. Oklak	)
Raymond R. Oneglia	)
Dale A. Reiss	)
Dickran M. Tevrizian, Jr.	)	Dated: February 24, 2021

38

TUTOR PERINI CORPORATION AND SUBSIDIARIES

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

TABLE OF CONTENTS

	Page
Consolidated Financial Statements of the Registrant
Report of Independent Registered Public Accounting Firm	F-2
Consolidated Statements of Operations	F-5
Consolidated Statements of Comprehensive Income (Loss)	F-6
Consolidated Balance Sheets	F-7
Consolidated Statements of Cash Flows	F-8
Consolidated Statements of Changes in Equity	F-9
Notes to Consolidated Financial Statements	F-10

F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Tutor Perini Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Tutor Perini Corporation and subsidiaries (the “Company”) as of December 31, 2020 and 2019, the related consolidated statements of operations, comprehensive income (loss), changes in equity, and cash flows, for each of the three years in the period ended December 31, 2020, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 24, 2021, expressed an unqualified opinion on the Company's internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Revenue, Accounts Receivable, Contract Assets and Liabilities — Accounting for Construction Contracts– Refer to Notes 1, 3, 4, and 8 to the consolidated financial statements

Critical Audit Matter Description

The Company recognizes revenue for construction contracts over the contract term (“over time”) as construction work progresses. The accounting for these contracts involves judgment, particularly as it relates to the process of determining total estimated revenue (transaction price) and estimating total costs to be incurred at contract completion. Costs of operations are typically recognized as incurred, and the Company’s revenues, including estimated profits, are recorded proportionately as costs are incurred based on the ratio of costs incurred to date to the total estimated costs at completion for the respective performance obligations. Assumptions as to the occurrence of future events and the likelihood and amount of variable consideration, including the impact of change orders, claims, contract disputes and the achievement of contractual performance criteria, and award or other incentive fees are made during the contract performance period (collectively referred to as “variable consideration”). The Company estimates variable consideration at the most likely amount it expects to receive, and includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Also, the Company often engages subcontractors, suppliers, or vendors, to provide underlying materials or services, or a combination of both. Judgment

F-2

is involved in determining estimated recoveries from disputes regarding performance under these contracts (“back charges”), which are a reduction in costs and are recorded as a receivable on the consolidated balance sheet.

Given the significant judgment necessary to account for the Company’s construction contracts including the use of estimates, such as total estimated revenue, total costs to be incurred at contract completion, variable consideration and back charges, which are complex and subject to many variables, auditing the corresponding balances and related accounting estimates required extensive audit effort due to the complexity of these estimates, and a high degree of auditor judgment when performing audit procedures and evaluating the results of those procedures.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to management’s estimates and judgments included within the Company’s total estimated revenues, total costs to be incurred at contract completion, variable consideration, and back charges included the following, among others:

•We tested the effectiveness of controls over revenues, including those over the determination of estimated costs at completion of the contract, total estimated revenue (including the estimated percentage of completion), variable consideration (including significant change orders and claims), and back charges.

•We selected a sample of construction contracts and performed the following:

◦Compared the total estimated revenue (transaction price), including estimated variable consideration, to the consideration expected to be received based on current rights and obligations under the contracts and any modifications that were agreed upon with the customers.

◦We evaluated the reasonableness of the estimated variable consideration by 1) evaluating the information supporting management’s judgment as to the cause and contractual rights and 2) testing the accuracy of the identification of the underlying costs.

◦Tested the accuracy and completeness of costs incurred to date.

◦Evaluated the reasonableness of management’s estimates of total cost and profit at completion for selected contracts by:

•Evaluating management’s ability to achieve the estimates of total cost and profit by performing corroborating inquiries with the Company’s project managers, and comparing the estimates to management’s work plans, engineering specifications, and supplier contracts.

•Comparing management’s estimates to supporting documents for those estimates, when applicable.

•Evaluating management’s ability to accurately estimate total costs and profits at completion by comparing actual costs and profits to management’s historical estimates for performance obligations that have been fulfilled.

•Evaluating trends on changes in estimates and obtaining evidence on timing and amounts supporting these changes in estimates.

◦Tested the mathematical accuracy of management’s calculation of revenue recognized.

•We evaluated selected quarter over quarter changes in contract profit estimates by obtaining explanations from the Company’s project managers regarding timing and amount and corroborating these inquiries by reading documents such as management work plans, customer communications, invoices and supplier communications.

•Performed procedures on recorded back charges to evaluate the reasonableness of the estimated recovery by 1) evaluating the information supporting management’s judgment as to the cause and contractual rights and 2) testing the accuracy of the identification of the underlying costs.

Goodwill – Refer to Notes 1 and 6 to the consolidated financial statements

Critical Audit Matter Description

The Company’s evaluation of goodwill for impairment involves the comparison of the fair value of the Civil reporting unit (which corresponds with the Company’s Civil operating segment and is the only reporting unit with a goodwill balance) to its carrying value. The Company determines the fair value of the reporting unit using the income approach and market approach. The determination of fair value using the income-based approach requires management to make significant estimates and assumptions related to projected operating margins, cash flows generated from existing work and new awards, and projected investments in working capital (collectively, the “forecasted financial information”), as well as the discount rates and weighted-

F-3

average cost of capital (“WACC”). The determination of fair value using the market-based approach requires management to make significant assumptions, including those related to the forecasted financial information referred to above and the industry-comparable multiples to be used for each of its reporting units. The Company determines the valuation of the reporting unit based upon a weighted-average value of the income approach and market approach. In evaluating the results there are various quantitative and qualitative factors that need to be considered and could involve subjective judgment.

We identified goodwill as a critical audit matter because small changes to valuation assumptions, specifically the forecasted financial information, discount rates, WACC, and industry-comparable multiples, could have a significant impact on the reporting unit concluded value for the annual goodwill impairment test. Auditing these assumptions involved extensive audit effort, including the need to involve our fair value specialists, due to the complexity of these assumptions and a high degree of auditor judgment when performing audit procedures and evaluating the results of those procedures.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the forecasted financial information, discount rates, WACC, and industry-comparable multiples for the reporting unit included the following, among others:

•We tested the effectiveness of controls within the goodwill impairment test process, including those over the forecasted financial information, the selection of the industry-comparable multiples, WACC, and discount rates, as well as the identification of interim impairment indicators.

•We evaluated management’s historical ability to accurately forecast by comparing actual results to management’s previous forecasted financial information for the same period.

•We evaluated the reasonableness of management’s forecasted financial information by comparing the forecasted financial information to (1) historical results, (2) internal communications to management and the Board of Directors, (3) reporting units’ backlog, and (4) forecasted financial information included in the Company’s press releases, as well as analyst and industry reports of the Company and companies in its peer group.

•We considered the impact of circumstances affecting the industry including, but not limited to, changes in the legal and business environment.

•With the assistance of our fair value specialists, we evaluated the WACC and discount rates, including testing the underlying source information and the mathematical accuracy of the calculations, and developing a range of independent estimates of the discount rates and comparing those to the WACC and discount rates selected by management.

•With the assistance of our fair value specialists, we evaluated the industry-comparable multiples, including testing the underlying source information and mathematical accuracy of the calculations, the acceptability of the selected companies within the Company’s peer group, and comparing the multiples selected by management to companies in the engineering and construction industry.

•We evaluated the selected industry-comparable multiples by comparing to those used in the prior year, those used in the Civil reporting unit and to current facts and circumstances affecting the Civil reporting unit.

/s/ Deloitte & Touche LLP

Los Angeles, CA

February 24, 2021

We have served as the Company's auditor since 2002.

F-4

TUTOR PERINI CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

	Year Ended December 31,
(in thousands, except per common share amounts)	2020		2019		2018
REVENUE	$	5,318,763	$	4,450,832	$	4,454,662
COST OF OPERATIONS	(4,832,610)		(4,209,060)		(4,000,209)
GROSS PROFIT	486,153		241,772		454,453
General and administrative expenses	(223,809)		(226,916)		(262,577)
Goodwill impairment	—		(379,863)		—
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	262,344		(365,007)		191,876
Other income (expense)	(11,853)		6,667		4,256
Interest expense	(76,212)		(67,494)		(63,519)
INCOME (LOSS) BEFORE INCOME TAXES	174,279		(425,834)		132,613
Income tax (expense) benefit	(21,942)		65,609		(34,832)
NET INCOME (LOSS)	152,337		(360,225)		97,781
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	43,943		27,465		14,345
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$	108,394	$	(387,690)	$	83,436
BASIC EARNINGS (LOSS) PER COMMON SHARE	$	2.14	$	(7.72)	$	1.67
DILUTED EARNINGS (LOSS) PER COMMON SHARE	$	2.12	$	(7.72)	$	1.66
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC	50,656		50,220		49,952
DILUTED	51,077		50,220		50,301

The accompanying notes are an integral part of these consolidated financial statements.

F-5

TUTOR PERINI CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31,
(in thousands)	2020		2019		2018
NET INCOME (LOSS)	$	152,337	$	(360,225)	$	97,781
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	(6,261)		844		771
Foreign currency translation adjustments	279		1,337		(2,945)
Unrealized gain (loss) in fair value of investments	1,571		1,561		(778)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(4,411)		3,742		(2,952)
COMPREHENSIVE INCOME (LOSS)	147,926		(356,483)		94,829
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	44,173		27,858		14,124
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$	103,753	$	(384,341)	$	80,705

The accompanying notes are an integral part of these consolidated financial statements.

F-6

TUTOR PERINI CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	As of December 31,
(in thousands, except share and per share amounts)	2020		2019
ASSETS
CURRENT ASSETS:
Cash and cash equivalents ($105,735 and $103,850 related to VIEs)	$	374,289	$	193,685
Restricted cash	77,563		8,416
Restricted investments	78,912		70,974
Accounts receivable ($86,012 and $91,090 related to VIEs)	1,415,063		1,354,519
Retainage receivable ($122,335 and $89,132 related to VIEs)	648,441		562,375
Costs and estimated earnings in excess of billings ($39,846 and $22,764 related to VIEs)	1,236,734		1,123,544
Other current assets ($51,746 and $58,128 related to VIEs)	249,455		197,473
Total current assets	4,080,457		3,510,986
PROPERTY AND EQUIPMENT:
Land	44,167		39,047
Building and improvements	116,422		115,041
Construction equipment	570,675		560,547
Other equipment	192,247		183,197
	923,511		897,832
Less accumulated depreciation	(434,294)		(388,147)
Total property and equipment, net ($12,840 and $49,919 related to VIEs)	489,217		509,685
GOODWILL	205,143		205,143
INTANGIBLE ASSETS, NET	123,115		155,270
OTHER ASSETS	147,685		104,693
TOTAL ASSETS	$	5,045,617	$	4,485,777
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $2,040 and $0	$	100,188	$	124,054
Accounts payable ($116,461 and $93,848 related to VIEs)	794,611		682,699
Retainage payable ($26,439 and $13,967 related to VIEs)	315,135		252,181
Billings in excess of costs and estimated earnings ($362,427 and $422,847 related to VIEs)	839,222		844,389
Accrued expenses and other current liabilities ($9,595 and $25,402 related to VIEs)	215,207		206,533
Total current liabilities	2,264,363		2,109,856
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $20,209 and $23,343	925,277		710,422
DEFERRED INCOME TAXES	82,966		35,686
OTHER LONG-TERM LIABILITIES	230,066		199,288
TOTAL LIABILITIES	3,502,672		3,055,252
COMMITMENTS AND CONTINGENCIES (Note 8)
EQUITY
Stockholders' equity:
Preferred stock – authorized 1,000,000 shares ($1 par value), none issued	—		—
Common stock – authorized 112,500,000 and 75,000,000 shares ($1 par value), issued and outstanding 50,827,205 and 50,278,816 shares	50,827		50,279
Additional paid-in capital	1,127,385		1,117,972
Retained earnings	422,385		313,991
Accumulated other comprehensive loss	(46,741)		(42,100)
Total stockholders' equity	1,553,856		1,440,142
Noncontrolling interests	(10,911)		(9,617)
TOTAL EQUITY	1,542,945		1,430,525
TOTAL LIABILITIES AND EQUITY	$	5,045,617	$	4,485,777

The accompanying notes are an integral part of these consolidated financial statements.

F-7

TUTOR PERINI CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	Year Ended December 31,
(in thousands)	2020		2019		2018
Cash Flows from Operating Activities:
Net income (loss)	$	152,337	$	(360,225)	$	97,781
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Goodwill impairment	—		379,863		—
Depreciation	74,879		58,818		43,724
Amortization of intangible assets	32,155		6,226		3,543
Share-based compensation expense	11,833		19,143		22,782
Change in debt discounts and deferred debt issuance costs	20,153		13,207		12,072
Deferred income taxes	48,253		(71,609)		(449)
Gain on remeasurement of investment in joint venture	—		(37,792)		—
(Gain) loss on sale of property and equipment	(1,673)		(4,688)		402
Changes in other components of working capital, net of balances acquired	(169,976)		131,257		(156,844)
Other long-term liabilities	4,352		1,863		(2,007)
Other, net	459		467		398
NET CASH PROVIDED BY OPERATING ACTIVITIES	172,772		136,530		21,402
Cash Flows from Investing Activities:
Business acquisition, cash balance acquired net of cash paid	—		6,607		—
Acquisition of property and equipment	(54,781)		(84,196)		(77,069)
Proceeds from sale of property and equipment	14,550		12,581		6,387
Investments in securities	(31,331)		(35,167)		(20,848)
Proceeds from maturities and sales of investments in securities	25,204		24,120		21,322
NET CASH USED IN INVESTING ACTIVITIES	(46,358)		(76,055)		(70,208)
Cash Flows from Financing Activities:
Proceeds from debt	1,301,282		931,594		1,753,160
Repayment of debt	(1,119,887)		(870,277)		(1,738,314)
Business acquisition related payment	—		—		(15,951)
Cash payments related to share-based compensation	(1,397)		(2,363)		(2,671)
Distributions paid to noncontrolling interests	(48,467)		(46,500)		(29,000)
Contributions from noncontrolling interests	3,000		9,813		3,797
Debt issuance, extinguishment and modification costs	(11,194)		(504)		—
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	123,337		21,763		(28,979)
Net increase (decrease) in cash, cash equivalents and restricted cash	249,751		82,238		(77,785)
Cash, cash equivalents and restricted cash at beginning of year	202,101		119,863		197,648
Cash, cash equivalents and restricted cash at end of year	$	451,852	$	202,101	$	119,863

The accompanying notes are an integral part of these consolidated financial statements.

F-8

TUTOR PERINI CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

(in thousands)	Common Stock		Additional Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Noncontrolling Interests		Total
Balance - December 31, 2017	$	49,781	$	1,084,205	$	622,007	$	(42,718)	$	(8,495)	$	1,704,780
Cumulative effect of accounting change	—		—		(3,762)		—		(1,714)		(5,476)
Net income	—		—		83,436		—		14,345		97,781
Other comprehensive loss	—		—		—		(2,731)		(221)		(2,952)
Share-based compensation	—		21,544		—		—		—		21,544
Issuance of common stock, net	245		(2,830)		—		—		—		(2,585)
Contributions from noncontrolling interests	—		—		—		—		3,797		3,797
Distributions to noncontrolling interests	—		—		—		—		(29,000)		(29,000)
Balance - December 31, 2018	$	50,026	$	1,102,919	$	701,681	$	(45,449)	$	(21,288)	$	1,787,889
Net income (loss)	—		—		(387,690)		—		27,465		(360,225)
Other comprehensive income	—		—		—		3,349		393		3,742
Share-based compensation	—		17,571		—		—		—		17,571
Issuance of common stock, net	253		(2,518)		—		—		—		(2,265)
Contributions from noncontrolling interests	—		—		—		—		9,813		9,813
Distributions to noncontrolling interests	—		—		—		—		(46,500)		(46,500)
Recognized fair value of noncontrolling interest in joint venture upon consolidation	—		—		—		—		20,500		20,500
Balance - December 31, 2019	$	50,279	$	1,117,972	$	313,991	$	(42,100)	$	(9,617)	$	1,430,525
Net income	—		—		108,394		—		43,943		152,337
Other comprehensive income (loss)	—		—		—		(4,641)		230		(4,411)
Share-based compensation	—		11,928		—		—		—		11,928
Reacquisition of equity component from convertible note repurchase, net of taxes	—		(764)		—		—		—		(764)
Issuance of common stock, net	548		(1,751)		—		—		—		(1,203)
Contributions from noncontrolling interests	—		—		—		—		3,000		3,000
Distributions to noncontrolling interests	—		—		—		—		(48,467)		(48,467)
Balance - December 31, 2020	$	50,827	$	1,127,385	$	422,385	$	(46,741)	$	(10,911)	$	1,542,945

The accompanying notes are an integral part of these consolidated financial statements.

F-9

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.Summary of Significant Accounting Policies

(a) Basis of Presentation

The accompanying consolidated financial statements have been prepared in compliance with generally accepted accounting principles in the United States (“GAAP”) as codified in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”). Certain amounts in the notes to the consolidated financial statements of prior years have been reclassified to conform to the current year presentation.

(b) Principles of Consolidation

The consolidated financial statements include the accounts of Tutor Perini Corporation and its wholly owned subsidiaries (the “Company”). The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with ASC 810, Consolidation (“ASC 810”). If a joint venture is a VIE and the Company is the primary beneficiary, the joint venture is fully consolidated (See Note 13). If a joint venture is not a VIE, it may be consolidated under the voting interest method if the Company holds a controlling financial interest in the joint venture. The Company is considered to hold a controlling financial interest when it is able to exercise control over the joint venture’s operating and financial decisions. For construction joint ventures that do not need to be consolidated, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. Intercompany balances and transactions have been eliminated.

(c) Use of Estimates

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect reported amounts. These estimates are based on information available through the date of the issuance of the financial statements; therefore, actual results could differ from those estimates.

(d) Revenues

Revenue Recognition

The Company derives revenue from long-term construction contracts with public and private customers primarily in the United States and its territories and in certain other international locations. The Company’s construction contracts are generally each accounted for as a single unit of account (i.e., as a single performance obligation).

Throughout the execution of construction contracts, the Company and its affiliated entities recognize revenue with the continuous transfer of control to the customer. The customer typically controls the asset under construction by either contractual termination clauses or by the Company’s rights to payment for work already performed on the asset under construction that does not have an alternative use for the Company.

Because control transfers over time, revenue is recognized to the extent of progress towards completion of the performance obligations. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services provided. The Company generally uses the cost-to-cost method for its contracts, which measures progress towards completion for each performance obligation based on the ratio of costs incurred to date to the total estimated costs at completion for the respective performance obligation. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Revenue, including estimated fees or profits, is recorded proportionately as costs are incurred. Cost of operations includes labor, materials, subcontractor costs, and other direct and indirect costs, including depreciation and amortization.

Due to the nature of the work required to be performed on many of the Company’s performance obligations, estimating total revenue and cost at completion is complex, subject to many variables and requires significant judgment. Assumptions as to the occurrence of future events and the likelihood and amount of variable consideration, including the impact of change orders, claims, contract disputes and the achievement of contractual performance criteria, and award or other incentive fees are made during the contract performance period. The Company estimates variable consideration at the most likely amount it expects to receive. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal

F-10

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of anticipated performance and all information (historical, current and forecasted) that is reasonably available to management. Back charges to suppliers or subcontractors are recognized as a reduction of cost when it is determined that recovery of such cost is probable and the amounts can be reliably estimated. Disputed back charges are recognized when the same requirements described above for variable consideration have been satisfied.

Changes in Estimates on Construction Contracts

The Company’s estimates of contract revenue and cost are highly detailed and many factors change during a contract performance period that result in a change to contract profitability. These factors include, but are not limited to, differing site conditions; availability of skilled contract labor; performance of major material suppliers and subcontractors; on-going subcontractor negotiations and buyout provisions; unusual weather conditions; changes in the timing of scheduled work; change orders; accuracy of the original bid estimate; changes in estimated labor productivity and costs based on experience to date; achievement of incentive-based income targets; and the expected, or actual, resolution terms for claims. The factors that cause changes in estimates vary depending on the maturation of the project within its lifecycle. For example, in the ramp-up phase, these factors typically consist of revisions in anticipated project costs and during the peak and closeout phases, these factors include the impact of change orders and claims, as well as additional revisions in remaining anticipated project costs. Generally, if the contract is at an early stage of completion, the current period impact is smaller than if the same change in estimate is made to the contract at a later stage of completion. Management evaluates changes in estimates on a contract-by-contract basis and discloses significant changes, if material, in the Notes to Consolidated Financial Statements. The cumulative catch-up method is used to account for revisions in estimates.

(e) Depreciation of Property and Equipment and Amortization of Long-Lived Intangible Assets

Property and equipment and long-lived intangible assets are generally depreciated or amortized on a straight-line basis over their estimated useful lives ranging from three to forty years.

(f) Recoverability of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever circumstances indicate that the future cash flows generated by the assets might be less than the assets’ net carrying value. In such circumstances, an impairment loss will be recognized by the amount the assets’ net carrying value exceeds their fair value.

(g) Recoverability of Goodwill

The Company tests goodwill for impairment annually as of October 1 for each reporting unit and between annual tests if events occur or circumstances change which suggest that goodwill should be reevaluated. Such events or circumstances include significant changes in legal factors and business climate, recent losses at a reporting unit, and industry trends, among other factors. The Civil, Building and Specialty Contractors segments each represent a reporting unit, and the Civil reporting unit carried the remaining goodwill balance at December 31, 2020 as a result of the $379.9 million impairment loss recognized in 2019. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using a weighted average of an income and a market approach. These approaches utilize various valuation assumptions, and small changes to the assumptions could have a significant impact on the concluded fair value. The income approach is based on estimated present value of future cash flows for each reporting unit carrying a goodwill balance. The market approach is based on assumptions about how market data relates to each reporting unit carrying a goodwill balance. The weighting of these two approaches is based on their individual correlation to the economics of each reporting unit carrying a goodwill balance. The annual quantitative assessment performed in the fourth quarter of 2020 resulted in an estimated fair value that exceeded the net book value of the Civil reporting unit; therefore, no impairment charge was necessary.

(h) Recoverability of Non-Amortizable Trade Names

Certain trade names have an estimated indefinite life and are not amortized to earnings, but instead are reviewed for impairment annually, or more often if events occur or circumstances change which suggest that the non-amortizable trade names should be reevaluated. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using an income approach (relief from royalty method). The assessment performed in the fourth quarter of 2020 resulted in an estimated fair value for the non-amortizable trade names that exceeded their respective net book values; therefore, no impairment charge was necessary.

F-11

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(i) Income Taxes

Deferred income tax assets and liabilities are recognized for the effects of temporary differences between the financial statement carrying amounts and the income tax basis of assets and liabilities using tax rates expected to be in effect when such differences reverse. Income tax positions must meet a more-likely-than-not threshold to be recognized. The Company recognizes interest and penalties related to uncertain tax positions as a component of the income tax provision.

(j) Earnings Per Common Share (EPS)

Basic EPS and diluted EPS are calculated by dividing net income attributable to Tutor Perini Corporation by the following: for basic EPS, the weighted-average number of common shares outstanding during the period; and for diluted EPS, the sum of the weighted-average number of both outstanding common shares and potentially dilutive securities, which for the Company can include restricted stock units, unexercised stock options and the Convertible Notes, as defined in Note 7. In accordance with ASC 260, Earnings Per Share, the settlement of the principal amount of the Convertible Notes has no impact on diluted EPS because the Company has the intent and ability to settle the principal amount in cash. See Note 7 for further discussion of the Convertible Notes. The Company calculates the effect of the potentially dilutive restricted stock units and stock options using the treasury stock method.

	Year Ended December 31,
(in thousands, except per common share data)	2020		2019		2018
Net income (loss) attributable to Tutor Perini Corporation	$	108,394	$	(387,690)	$	83,436
Weighted-average common shares outstanding, basic	50,656		50,220		49,952
Effect of dilutive restricted stock units and stock options	421		—		349
Weighted-average common shares outstanding, diluted	51,077		50,220		50,301
Net income (loss) attributable to Tutor Perini Corporation per common share:
Basic	$	2.14	$	(7.72)	$	1.67
Diluted	$	2.12	$	(7.72)	$	1.66
Anti-dilutive securities not included above	1,862		3,640		2,670

For the year ended December 31, 2019, all outstanding restricted stock units and stock options were excluded from the calculation of weighted-average diluted shares outstanding due to the net loss for the period.

(k) Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets to the amounts shown in the Consolidated Statements of Cash Flows:

	As of December 31,
(in thousands)	2020		2019
Cash and cash equivalents available for general corporate purposes	$	210,841	$	43,760
Joint venture cash and cash equivalents	163,448		149,925
Cash and cash equivalents	374,289		193,685
Restricted cash	77,563		8,416
Total cash, cash equivalents and restricted cash	$	451,852	$	202,101

Cash equivalents include short-term, highly liquid investments with maturities of three months or less when acquired. Cash and cash equivalents consist of amounts available for the Company’s general purposes, the Company’s proportionate share of cash held by the Company’s unconsolidated joint ventures and 100% of amounts held by the Company’s consolidated joint ventures. In both cases, cash held by joint ventures is available only for joint venture-related uses, including future distributions to joint venture partners.

As of December 31, 2020, restricted cash consists primarily of $69.9 million held to repay the outstanding principal balance of Convertible Notes described in more detail in Note 7. Restricted cash also includes amounts held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit.

F-12

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(l) Restricted Investments

The Company has restricted investments primarily held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit. Restricted investments are primarily comprised of investments in U.S. government agency securities and corporate debt securities that are rated A3 or better.

(m) Share-Based Compensation

The Company’s long-term incentive plans allow the Company to grant share-based compensation awards in a variety of forms, including restricted and unrestricted stock units and stock options. Restricted stock units and stock options generally vest subject to service and/or performance requirements, with related compensation expense equal to the fair value of the award on the date of grant and recognized on a straight-line basis over the requisite period. The Company may grant awards that require liability classification and are remeasured at fair value at the end of each reporting period with the change in fair value recognized as compensation cost.

For share-based awards that have a service requirement, the Company accounts for forfeitures upon occurrence, rather than estimating the probability of forfeiture at the date of grant. Accordingly, the Company recognizes the full grant-date fair value of these awards on a straight-line basis throughout the requisite service period, reversing any expense if, and only if, there is a forfeiture.

For share-based awards that have a performance-based vesting requirement, the Company evaluates the probability of achieving the performance criteria throughout the performance period, and will adjust share-based compensation expense if it estimates that the achievement of the performance criteria is not probable. Certain performance-based awards contain market condition components and are valued on the date of grant using a Monte Carlo simulation model. The fair value of such awards is expensed ratably over the performance period and is not adjusted for actual achievement.

(n) Insurance Liabilities

The Company typically utilizes third-party insurance coverage subject to varying deductible levels with aggregate caps on losses retained. The Company assumes the risk for the amount of the deductible portion of the losses and liabilities primarily associated with workers’ compensation and general liability coverage. In addition, on certain projects, the Company assumes the risk for the amount of the deductible portion of losses that arise from any subcontractor defaults. Losses are accrued based upon the Company’s estimates of the aggregate liability for claims incurred using historical experience and certain actuarial assumptions followed in the insurance industry. The estimate of insurance liability within the deductible limits includes an estimate of incurred but not reported claims based on data compiled from historical experience.

(o) Other Comprehensive Income (Loss)

ASC 220, Comprehensive Income, establishes standards for reporting comprehensive income and its components in the consolidated financial statements. The Company reports the change in pension benefit plan assets/liabilities, cumulative foreign currency translation, and change in fair value of investments as components of accumulated other comprehensive income (loss) (“AOCI”).

F-13

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The components of other comprehensive income (loss) and the related tax effects for the years ended December 31, 2020, 2019 and 2018 were as follows:

	Year Ended December 31,
	2020						2019						2018
(in thousands)	Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount
Other comprehensive income (loss):
Defined benefit pension plan adjustments	$	(8,700)	$	2,439	$	(6,261)	$	1,180	$	(336)	$	844	$	1,079	$	(308)	$	771
Foreign currency translation adjustment	178		101		279		1,867		(530)		1,337		(4,067)		1,122		(2,945)
Unrealized gain (loss) in fair value of investments	2,015		(444)		1,571		1,982		(421)		1,561		(1,005)		227		(778)
Total other comprehensive income (loss)	$	(6,507)	$	2,096	$	(4,411)	$	5,029	$	(1,287)	$	3,742	$	(3,993)	$	1,041	$	(2,952)
Less: Other comprehensive income (loss) attributable to noncontrolling interests(a)	230		—		230		393		—		393		(221)		—		(221)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation	$	(6,737)	$	2,096	$	(4,641)	$	4,636	$	(1,287)	$	3,349	$	(3,772)	$	1,041	$	(2,731)

________________________________________________________________________________________

(a)The only component of other comprehensive income (loss) attributable to noncontrolling interests is foreign currency translation.

The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the years ended December 31, 2020, 2019 and 2018 were as follows:

(in thousands)	Defined Benefit Pension Plan		Foreign Currency Translation		Unrealized Gain (Loss) in Fair Value of Investments		Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance as of December 31, 2017	$	(39,441)	$	(3,591)	$	314	$	(42,718)
Other comprehensive loss before reclassifications	(695)		(2,724)		(835)		(4,254)
Amounts reclassified from AOCI	1,466		—		57		1,523
Balance as of December 31, 2018	$	(38,670)	$	(6,315)	$	(464)	$	(45,449)
Other comprehensive income (loss) before reclassifications	(539)		944		1,621		2,026
Amounts reclassified from AOCI	1,383		—		(60)		1,323
Balance as of December 31, 2019	$	(37,826)	$	(5,371)	$	1,097	$	(42,100)
Other comprehensive income (loss) before reclassifications	(7,993)		49		1,820		(6,124)
Amounts reclassified from AOCI	1,732		—		(249)		1,483
Balance as of December 31, 2020	$	(44,087)	$	(5,322)	$	2,668	$	(46,741)

The significant items reclassified out of AOCI and the corresponding location and impact on the Consolidated Statements of Operations during the years ended December 31, 2020, 2019 and 2018 are as follows:

	Location in Consolidated	Year Ended December 31,
(in thousands)	Statements of Operations	2020		2019		2018
Component of AOCI:
Defined benefit pension plan adjustments	Other income (expense)	$	2,407	$	1,933	$	2,052
Income tax benefit	Income tax expense (benefit)	(675)		(550)		(586)
Net of tax		$	1,732	$	1,383	$	1,466
Unrealized (gain) loss in fair value of investment adjustments	Other income (expense)	$	(315)	$	(76)	$	72
Income tax expense (benefit)	Income tax expense (benefit)	66		16		(15)
Net of tax		$	(249)	$	(60)	$	57

F-14

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(p) Recent Accounting Pronouncements

In March 2020, the FASB issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). The amendments in ASU 2020-04 provide temporary optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions to ease the potential accounting and financial reporting burden associated with transitioning away from reference rates that are expected to be discontinued, including the London Interbank Offered Rate (“LIBOR”). ASU 2020-04 is effective as of March 12, 2020 through December 31, 2022. The adoption of the new standard has not had and is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance within ASU 2019-04 and ASU 2019-05 (collectively, “ASU 2016-13”). The amendments in ASU 2016-13 replace the incurred loss impairment methodology with the current expected credit loss model, which requires consideration of a broader range of reasonable and supportable information to estimate credit losses. The Company adopted this ASU effective January 1, 2020. The adoption of ASU 2016-13 did not have a material impact on the Company’s financial position, results of operations or cash flows.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), as amended and supplemented by subsequent ASUs (collectively, “ASC 842”). The Company adopted this ASU effective January 1, 2019 using the optional transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. As such, the 2018 comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.

The following recent accounting pronouncements require implementation in future periods.

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). The amendments in ASU 2020-06 simplify accounting for convertible instruments by removing major separation models required under current GAAP. Consequently, more convertible debt instruments will be reported as a single liability instrument with no separate accounting for embedded conversion features. ASU 2020-06 removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception. Also, ASU 2020-06 requires the application of the if-converted method for calculating diluted EPS and the treasury stock method will no longer be available. ASU 2020-06 is effective for interim and annual reporting periods beginning after December 15, 2021, with early adoption permitted. The Company does not expect to early adopt the new standard and does not expect it to have an impact on the Company's financial position, results of operations or cash flows.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”), modifying ASC 740, Income Taxes (“ASC 740”). The amendments in ASU 2019-12, among other things, remove certain exceptions to the general principles in ASC 740 and seek more consistent application by clarifying and amending the existing guidance. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020. The Company is currently evaluating the new standard, which is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

F-15

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.    Consolidated Statements of Cash Flows

Below are the changes in other components of working capital, net of balances related to incremental interest acquired in a Civil segment joint venture during 2019 (see Note 12), as shown in the Consolidated Statements of Cash Flows, the supplemental disclosure of cash paid for interest and income taxes and the supplemental disclosure of non-cash investing activities:

	Year Ended December 31,
(in thousands)	2020		2019		2018
(Increase) Decrease in:
Accounts receivable	$	(104,901)	$	(81,983)	$	3,899
Retainage receivable	(85,769)		(78,520)		56,754
Costs and estimated earnings in excess of billings	(113,190)		18,751		(209,537)
Other current assets	(49,468)		(76,146)		15,398
(Decrease) Increase in:
Accounts payable	111,912		53,999		(78,243)
Retainage payable	62,954		35,013		(49,864)
Billings in excess of costs and estimated earnings	(5,168)		245,292		76,703
Accrued expenses and other current liabilities	13,654		14,851		28,046
Changes in other components of working capital	$	(169,976)	$	131,257	$	(156,844)
Cash paid during the year for:
Interest	$	57,038	$	56,137	$	51,063
Income taxes	$	11,204	$	43,374	$	13,652
Supplemental disclosure of non-cash investing activities:
Real property acquired in settlement of a receivable	$	11,660	$	—	$	—

F-16

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3.    Revenue

Disaggregation of Revenue

The following tables disaggregate revenue by end market, customer type and contract type, which the Company believes best depict how the nature, amount, timing and uncertainty of its revenue and cash flows are affected by economic factors for the years ended December 31, 2020, 2019 and 2018.

	Year Ended December 31,
(in thousands)	2020		2019		2018
Civil segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	1,367,412	$	992,755	$	702,614
Bridges	306,161		334,117		431,202
Military defense facilities	146,969		59,082		26,225
Highways	122,254		86,747		202,423
Water	101,705		33,370		10,195
Other	155,398		273,281		213,434
Total Civil segment revenue	$	2,199,899	$	1,779,352	$	1,586,093

	Year Ended December 31,
(in thousands)	2020		2019		2018
Building segment revenue by end market:
Commercial and industrial facilities	$	580,297	$	459,806	$	374,312
Hospitality and gaming	474,329		297,700		301,871
Municipal and government	287,337		254,736		261,496
Mass transit (includes transportation projects)	218,930		201,400		67,588
Education facilities	173,472		143,382		145,147
Health care facilities	117,968		239,299		428,819
Mixed use	59,391		31,685		150,549
Other	72,917		114,032		131,917
Total Building segment revenue	$	1,984,641	$	1,742,040	$	1,861,699

	Year Ended December 31,
(in thousands)	2020		2019		2018
Specialty Contractors segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	592,430	$	419,402	$	296,092
Commercial and industrial facilities	152,868		186,819		189,632
Multi-unit residential	139,924		83,903		81,023
Water	73,769		37,403		22,390
Mixed use	47,022		64,302		163,308
Education facilities	44,762		70,229		99,214
Other	83,448		67,382		155,211
Total Specialty Contractors segment revenue	$	1,134,223	$	929,440	$	1,006,870

F-17

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,875,653	$	534,449	$	533,768	$	2,943,870
Federal agencies	175,933		143,327		75,067		394,327
Private owners	148,313		1,306,865		525,388		1,980,566
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,401,001	$	573,049	$	496,195	$	2,470,245
Federal agencies	116,869		153,467		11,326		281,662
Private owners	261,482		1,015,524		421,919		1,698,925
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,294,630	$	617,133	$	406,782	$	2,318,545
Federal agencies	95,567		201,745		53,335		350,647
Private owners	195,896		1,042,821		546,753		1,785,470
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

State and local agencies. The Company’s state and local government customers include state transportation departments, metropolitan authorities, cities, municipal agencies, school districts and public universities. Services provided to state and local customers are primarily pursuant to contracts awarded through competitive bidding processes. Construction services for state and local government customers have included mass-transit systems, tunnels, bridges, highways, judicial and correctional facilities, schools and dormitories, health care facilities, convention centers, parking structures and other municipal buildings. The vast majority of the Company’s civil contracting and building construction services are provided in locations throughout the United States and its territories.

Federal agencies. The Company’s federal government customers include the U.S. State Department, the U.S. Navy, the U.S. Army Corps of Engineers, the U.S. Air Force and the National Park Service. Services provided to federal agencies are typically pursuant to competitively bid contracts for specific or multi-year assignments that involve new construction or infrastructure repairs or improvements. A portion of revenue from federal agencies is derived from projects in overseas locations.

Private owners. The Company’s private owners (i.e., customers) include real estate developers, health care companies, technology companies, hospitality and gaming resort owners, Native American sovereign nations, public corporations and private universities. Services are provided to private customers through negotiated contract arrangements, as well as through competitive bids.

Most federal, state and local government contracts contain provisions that permit the termination of contracts, in whole or in part, for the convenience of government customers, among other reasons.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,792,765	$	508,655	$	1,010,973	$	3,312,393
Guaranteed maximum price	1,829		1,136,782		15,417		1,154,028
Unit price	392,548		867		83,257		476,672
Cost plus fee and other	12,757		338,337		24,576		375,670
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,315,195	$	561,831	$	769,410	$	2,646,436
Guaranteed maximum price	6,951		752,110		21,291		780,352
Unit price	436,015		12,063		91,803		539,881
Cost plus fee and other	21,191		416,036		46,936		484,163
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,054,473	$	377,538	$	857,742	$	2,289,753
Guaranteed maximum price	15,709		1,040,093		62,132		1,117,934
Unit price	469,305		32,468		32,562		534,335
Cost plus fee and other	46,606		411,600		54,434		512,640
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

Fixed price. Fixed price or lump sum contracts are most commonly used for projects in the Civil and Specialty Contractors segments and generally commit the Company to provide all of the resources required to complete a project for a fixed sum. Usually, fixed price contracts transfer more risk to the Company, but offer the opportunity for greater profits. Billings on fixed price contracts are typically based on estimated progress against predetermined contractual milestones.

Guaranteed maximum price (“GMP”). GMP contracts provide for a cost plus fee arrangement up to a maximum agreed upon price. These contracts place risks on the Company for amounts in excess of the GMP, but may permit an opportunity for greater profits than under cost plus fee contracts through sharing agreements with the owner on any cost savings that may be realized. Services provided by our Building segment to various private customers are often performed under GMP contracts. Billings on GMP contracts typically occur on a monthly basis and are based on actual costs incurred plus a negotiated margin.

Unit price. Unit price contracts are most prevalent for projects in the Civil and Specialty Contractors segments and generally commit the Company to provide an estimated or undetermined number of units or components that comprise a project at a fixed price per unit. This approach shifts the risk of estimating the quantity of units required to the project owner, but the risk of increased cost per unit is borne by the Company, unless otherwise allowed for in the contract. Billings on unit price contracts typically occur on a monthly basis and are based on actual quantity of work performed or completed during the billing period.

Cost plus fee. Cost plus fee contracts are used for many projects in the Building and Specialty Contractors segments. Cost plus fee contracts include cost plus fixed fee contracts and cost plus award fee contracts. Cost plus fixed fee contracts provide for reimbursement of approved project costs plus a fixed fee. Cost plus award fee contracts provide for reimbursement of the project costs plus a base fee, as well as an incentive fee based on cost and/or schedule performance. Cost plus fee contracts serve to minimize the Company’s financial risk, but may also limit profits. Billings on cost plus fee contracts typically occur on a monthly basis based on actual costs incurred plus a negotiated margin.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Changes in Contract Estimates that Impact Revenue

Changes to the total estimated contract revenue or cost for a given project, either due to unexpected events or revisions to management’s initial estimates, are recognized in the period in which they are determined. Revenue was negatively impacted during the year ended December 31, 2020 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $77.0 million for various projects. Revenue was negatively impacted during the year ended December 31, 2019 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $177.5 million for various projects, including a $123.9 million revenue impact that resulted from the charge related to the Alaskan Way Viaduct (SR 99) Matter discussed in Note 8. Revenue was positively impacted during the year ended December 31, 2018 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $19.4 million for various projects.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. As of December 31, 2020, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $4.8 billion, $1.5 billion and $1.8 billion for the Civil, Building and Specialty Contractors segments, respectively. As of December 31, 2019, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $5.2 billion, $2.2 billion and $2.2 billion for the Civil, Building and Specialty Contractors segments, respectively. The Company typically recognizes revenue on Civil segment projects over a period of three to five years, whereas for projects in the Building and Specialty Contractors segments, the Company typically recognizes revenue over a period of one to three years.

4.    Contract Assets and Liabilities

The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets include amounts due under retainage provisions, costs and estimated earnings in excess of billings and capitalized contract costs. The amounts as included on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage receivable	$	648,441	$	562,375
Costs and estimated earnings in excess of billings:
Claims	752,783		705,993
Unapproved change orders	415,489		362,264
Other unbilled costs and profits	68,462		55,287
Total costs and estimated earnings in excess of billings	1,236,734		1,123,544
Capitalized contract costs	74,452		80,294
Total contract assets	$	1,959,627	$	1,766,213

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances, such as contract-specific terms, project performance and other variables that may arise as the Company makes progress toward completion. As of December 31, 2020, the amount of retainage receivable estimated by management to be collected beyond one year is approximately 38% of the balance.

Costs and estimated earnings in excess of billings represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Costs and estimated earnings in excess of billings result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”), but a portion of the revenue recorded cannot be billed currently due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings. As discussed in Note 8, the resolution of these claims and unapproved change orders may require litigation or other forms of dispute resolution proceedings. Other unbilled costs and profits are billable in accordance with the billing terms of each of the existing contractual arrangements and, as such, the timing of contract billing cycles can cause fluctuations in the balance of unbilled costs and profits. Ultimate resolution of other unbilled costs and profits typically involves incremental progress toward contractual requirements or milestones. The amount of costs and estimated earnings in excess of billings as of December 31, 2020 estimated by management to be collected beyond one year is approximately $756.2 million.

Capitalized contract costs primarily represent costs to fulfill a contract that (1) directly relate to an existing or anticipated contract, (2) generate or enhance resources that will be used in satisfying performance obligations in the future and (3) are expected to be recovered through the contract, and are included in other current assets. Capitalized contract costs are generally expensed to the associated contract over the period of anticipated use on the project. During the years ended December 31, 2020, 2019 and 2018, $46.7 million, $33.8 million and $16.3 million, respectively, of previously capitalized contract costs were amortized and recognized as expense on the related contracts.

Contract liabilities include amounts owed under retainage provisions and billings in excess of costs and estimated earnings. The amount as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage payable	$	315,135	$	252,181
Billings in excess of costs and estimated earnings	839,222		844,389
Total contract liabilities	$	1,154,357	$	1,096,570

Retainage payable represents amounts invoiced to the Company by subcontractors where payments have been partially withheld pending the completion of certain milestones, other contractual conditions or upon the completion of the project. Generally, retainage payable is not remitted to subcontractors until the associated retainage receivable from customers is collected. As of December 31, 2020, the amount of retainage payable estimated by management to be remitted beyond one year is approximately 38% of the balance.

Billings in excess of costs and estimated earnings represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue. Revenue recognized during the years ended December 31, 2020, 2019 and 2018 and included in the opening billings in excess of costs and estimated earnings balances for each period totaled $690.7 million, $479.6 million and $382.7 million, respectively.

5.    Income Taxes

Income (loss) before taxes is summarized as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
United States operations	$	138,426	$	(456,403)	$	106,222
Foreign and U.S. territory operations	35,853		30,569		26,391
Total	$	174,279	$	(425,834)	$	132,613

F-21

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The income tax expense (benefit) is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Current (benefit) expense:
Federal	$	(36,159)	$	(2,884)	$	21,055
State	(1,282)		3,585		8,676
Foreign and U.S. territories	11,130		5,299		5,550
Total current (benefit) expense:	(26,311)		6,000		35,281
Deferred expense (benefit):
Federal	38,667		(43,579)		(1,773)
State	10,608		(27,566)		1,278
Foreign and U.S. territories	(1,022)		(464)		46
Total deferred expense (benefit):	48,253		(71,609)		(449)
Total expense (benefit):	$	21,942	$	(65,609)	$	34,832

The following table is a reconciliation of the Company’s income tax provision at the statutory federal tax rate to the Company’s effective tax rate:

	Year Ended December 31,
	2020				2019				2018
(dollars in thousands)	Amount		Rate		Amount		Rate		Amount		Rate
Federal income tax expense (benefit) at statutory tax rate	$	36,599	21.0	%	$	(89,425)	21.0	%	$	27,849	21.0	%
State income taxes, net of federal tax benefit	8,518		4.9		(18,442)		4.3		9,011		6.8
Stock based compensation	3,185		1.8		1,706		(0.4)		—		—
Impact of federal tax law changes	(14,476)		(8.3)		—		—		211		0.2
Officers' compensation	2,486		1.4		2,938		(0.7)		3,078		2.3
Goodwill impairment	—		—		43,990		(10.3)		—		—
Noncontrolling interests	(9,799)		(5.6)		(6,064)		1.4		(3,232)		(2.4)
Federal R&D credits	(3,007)		(1.7)		(3,998)		0.9		(2,658)		(2.0)
Reversal of reserve for uncertain tax positions due to statute expirations	(489)		(0.3)		(773)		0.2		(1,958)		(1.5)
Foreign tax rate differences	1,491		0.9		4,940		(1.2)		(19)		—
Other	(2,566)		(1.5)		(481)		0.2		2,550		1.9
Income tax expense (benefit)	$	21,942	12.6	%	$	(65,609)	15.4	%	$	34,832	26.3	%

The Company's provision for income taxes and effective tax rate for the year ended December 31, 2020 was significantly impacted by a change in tax law. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. A major provision of the CARES Act allows net operating losses from the 2018, 2019 and 2020 tax years to be carried back up to five years. As a result, for the year ended December 31, 2020, the Company was able to recognize tax benefits substantially in excess of the current federal statutory rate of 21% due to the effects of carrying back its net operating loss arising in 2019 to tax years in which the federal statutory rate was 35%.

The Company’s provision for income taxes and effective tax rate for the year ended December 31, 2019 was significantly impacted by the goodwill impairment charge discussed in Note 6. Of the total goodwill impairment charge of $379.9 million, approximately $209.5 million pertained to goodwill that was not tax deductible and yielded permanent differences between book income and taxable income. For the year ended December 31, 2019, the Company recognized U.S. federal and state tax benefits totaling $49.4 million as a result of the impairment charge.

F-22

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following is a summary of the significant components of the deferred tax assets and liabilities:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets:
Timing of expense recognition	$	24,470	$	44,761
Net operating losses	19,968		23,711
Goodwill	19,315		26,658
Other, net	10,155		17,098
Deferred tax assets	73,908		112,228
Valuation allowance	—		(2,212)
Net deferred tax assets	73,908		110,016
Deferred tax liabilities:
Intangible assets, due primarily to purchase accounting	(15,212)		(15,309)
Fixed assets	(76,567)		(75,461)
Construction contract accounting	(9,769)		(13,464)
Joint ventures	(41,669)		(24,331)
Other	(11,962)		(16,567)
Deferred tax liabilities	(155,179)		(145,132)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

As of December 31, 2020, the Company had net operating loss carryforwards for income tax purposes in various states totaling $196.5 million with expiration dates ranging from 2022 to 2039, and no net operating loss carryforwards for federal income tax purposes. As of December 31, 2019, the Company had federal and various state net operating loss carryforwards for income tax purposes of $29.3 million and $184.8 million, respectively. As of December 31, 2020, the Company had federal and state credit carryforwards of approximately $1.4 million and $2.0 million, respectively. As of December 31, 2019, the Company had federal and state credit carryforwards of approximately $6.0 million and $1.2 million, respectively.

The net deferred tax liabilities are presented in the Consolidated Balance Sheets as follows:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets	$	1,695	$	570
Deferred tax liabilities	(82,966)		(35,686)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

The Company’s policy is to record interest and penalties on unrecognized tax benefits as an element of income tax expense. The cumulative amounts related to interest and penalties are added to the total unrecognized tax liabilities on the balance sheet. The total amount of gross unrecognized tax benefits as of December 31, 2020 that, if recognized, would affect the effective tax rate is $8.7 million. The Company does not expect any significant release of unrecognized tax benefits within the next twelve months.

F-23

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The Company accounts for its uncertain tax positions in accordance with GAAP. The following is a reconciliation of the beginning and ending amounts of these unrecognized tax benefits for the three years ended December 31, 2020:

	As of December 31,
(in thousands)	2020		2019		2018
Beginning balance	$	5,682	$	4,998	$	6,495
Change in tax positions of prior years	2,286		351		(302)
Change in tax positions of current year	1,202		1,106		763
Reduction in tax positions for statute expirations	(489)		(773)		(1,958)
Ending Balance	$	8,681	$	5,682	$	4,998

The Company conducts business internationally and, as a result, one or more of its subsidiaries files income tax returns in U.S. federal, U.S. state and certain foreign jurisdictions. Accordingly, in the normal course of business, the Company is subject to examination by taxing authorities principally throughout the United States, Guam and Canada. The Company's open tax years for a U.S. federal income tax audit are for fiscal years 2017 and later, although there is currently no audit being conducted by the Internal Revenue Service. The Company has various years open to audit in a number of state and local jurisdictions and is currently under audit by certain state taxing authorities.

6.    Goodwill and Intangible Assets

Goodwill

The following table presents the changes in the carrying amount of goodwill since its inception through December 31, 2020:

(in thousands)	Civil		Building		Specialty Contractors		Total
Gross goodwill as of December 31, 2018	$	492,074	$	424,724	$	156,193	$	1,072,991
Accumulated impairment as of December 31, 2018	(76,716)		(411,269)		—		(487,985)
Goodwill as of December 31, 2018	415,358		13,455		156,193		585,006
2019 impairment	(210,215)		(13,455)		(156,193)		(379,863)
Goodwill as of December 31, 2019	205,143		—		—		205,143
Current year activity	—		—		—		—
Goodwill as of December 31, 2020(a)	$	205,143	$	—	$	—	$	205,143

_____________________________________________________________________________________________________________

(a)As of December 31, 2020, accumulated impairment was $867.8 million.

The Company performed its annual impairment test in the fourth quarter of 2020 and concluded goodwill was not impaired. In addition, the Company determined that no triggering events occurred and no circumstances changed since the date of our annual impairment test that would more likely than not reduce the fair value of the Civil reporting unit below its carrying amount.

During the year ended December 31, 2020, the novel coronavirus (“COVID-19”) pandemic, as well as the actions taken to contain and mitigate its public health effects, caused disruptions in domestic and global economies and financial markets. The vast majority of the Company’s projects, especially in its Civil reporting unit, have been designated as essential business, which allows the Company to continue its work on those projects. However, due to the fluidity of the pandemic, uncertainties as to its scope and duration, and ongoing changes in the way that governments, businesses and individuals are affected, the pandemic's future impact on the Company’s business, financial condition or performance remains uncertain. Among other things, governments could prohibit the continuation of certain projects that to date have been designated as “essential” or could impose health, safety and other operational requirements on such projects that could result in delays or suspensions of such projects. In addition, employees and contractors working on such projects could be unable or unwilling to continue working on them, perhaps for extended periods, because they may be unable or unwilling to be immunized against COVID-19, or for other reasons. The COVID-19 pandemic also could negatively affect the ability of counterparties or joint venture partners to make required payments on a timely basis or at all.

The Company considered the above factors in its annual impairment test in the fourth quarter of 2020. The Company will continue to monitor events and circumstances for changes that indicate the Civil reporting unit goodwill would need to be reevaluated for impairment during future interim periods prior to the annual impairment test. These future events and

F-24

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

circumstances include, but are not limited to, changes in the overall financial performance of the Civil reporting unit, impacts to our business as a result of the COVID-19 pandemic, as well as other quantitative and qualitative factors which could indicate potential triggering events for possible impairment.

Second Quarter of 2019 Goodwill Impairment

The net change in the carrying amount of goodwill for the year ended December 31, 2019 was primarily due to a goodwill impairment charge of $379.9 million recorded in the second quarter of 2019. In connection with the preparation of its quarterly financial statements during the second quarter of 2019, the Company assessed the changes in circumstances that occurred during the quarter to determine whether it was more likely than not that the fair values of any of its reporting units were below their carrying amounts. While there was no single determinative event or factor, potential triggering events identified in the accounting guidance (ASC 350, Intangibles – Goodwill and Other) developed during the second quarter of 2019, which led the Company to conclude that, when considering the events and factors in totality, it was more likely than not that the fair values of each of its reporting units were below their carrying amounts. The triggering factors included:

•The Company faced a declining stock price and observed a sustained decrease subsequent to the filing of the Company’s first quarter Form 10-Q on May 8, 2019, in both absolute terms and relative to its peers. Consistent with the average stock prices of companies in its peer group, the Company’s stock price had been trending lower over several prior periods; however, during the second quarter of 2019, the Company’s stock price dropped to a 52-week low while the average stock price of companies in its peer group increased. The Company believes that delays experienced in resolving certain claims and unapproved change orders, which when combined with the increased working capital needs and significant negative operating cash flows in the first quarter of 2019, has contributed significantly to the sustained decrease in the Company’s stock price;

•The Company experienced significant negative operating cash flows from each of its reporting units in the first quarter of 2019, and that trend continued at the beginning of the second quarter; and

•The Company’s debt rating was downgraded by a major credit rating agency on May 17, 2019.

As the Company determined that it was more likely than not that the fair values of its reporting units were below their carrying amounts, the Company performed an interim impairment test as of June 1, 2019 (the “Interim Test”) and, as described below, recognized a non-cash impairment loss totaling $379.9 million.

The decrease in the Company’s stock price reduced its total market capitalization and increased the implied control premium to a level beyond observable market-comparable data. As a result, when performing the Interim Test, the Company increased the discount rates and the projected investments in working capital compared to the assumptions used in the previous October 1, 2018 test, which extended the timing of certain expected future cash flows in the calculation of fair value under the income-based approach. The Company believes these changes were consistent with market participant inputs as reflected in the decrease in the Company’s market valuation at that time.

Consistent with the previous October 1, 2018 test, the Company utilized a weighted average of (1) an income approach and (2) a market approach to determine the fair value of the Company and each of its reporting units for the Interim Test. The income approach was based on estimated present value of future cash flows for each reporting unit. The market approach was based on assumptions about how market data relates to each reporting unit. The weighting of these two approaches was based on their individual correlation to the economics of each reporting unit as impacted by factors such as the availability of comparable market data for each reporting unit.

Assessing impairment inherently involves management judgments as to the assumptions used to calculate fair value of the reporting units and the impact of market conditions on those assumptions. The key inputs that the Company uses in its assumptions to estimate the fair value of its reporting units under the income-based approach are as follows:

•Weighted-average cost of capital (“WACC”), the risk-adjusted rate used to discount the projected cash flows;

•Cash flows generated from existing work and new awards; and

•Projected operating margins.

Expected future after-tax operating cash flows of each reporting unit are discounted to a present value using a risk-adjusted discount rate. Estimates of future cash flows require management to make significant assumptions concerning future operating performance including cash flows generated from existing work and new awards, projected operating margins, variations in the amount and timing of cash flows and the probability of achieving the estimated cash flows, as well as future economic conditions, which may differ from actual future cash flows. The discount rate, which is intended to reflect the risks inherent in future cash flow projections, used in estimating the present value of future cash flows, is based on estimates of the WACC of

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

market participants relative to the reporting units. Financial and credit market volatility can directly impact certain inputs and assumptions used to develop the WACC.

To develop the cash flows generated from new awards and future operating margins, the Company tracks known prospects of significance for each of its reporting units and considers the estimated timing of when the work is expected to be bid, started and completed. The Company also gives consideration to its relationships with the prospective owners; the pool of competitors that are capable of performing large, complex work; business strategy; and the Company’s history of success in winning new work in each reporting unit. With regard to operating margins, the Company gives consideration to its historical reporting unit operating margins in the end markets that the prospective work opportunities are most significant, expected margins from existing work, current market trends in recent new work procurement, and business strategy.

The Company also estimated the fair value of its reporting units under a market-based approach by applying industry-comparable multiples of revenues and operating earnings to its reporting units’ revenues and operating earnings. The conditions and prospects of companies in the engineering and construction industry depend on common factors such as overall demand for services.

The Company believes that the discount rates, timing of cash flows and other inputs and assumptions used in the Interim Test were consistent with those that a market participant would use based on the events described above which occurred during the second quarter of 2019 and were reflective of the market assessment of the fair value of its reporting units at that time. In addition, the Company believes that its estimates and assumptions about future revenues and margin projections in the Interim Test were reasonable and consistent with the estimates and assumptions used in the annual goodwill impairment test as of October 1, 2018. As an additional step to corroborate the Interim Test results, the Company compared its implied control premium with those of recent comparable market transactions and concluded that the implied control premium was within the range of control premiums observed in prior industry-specific M&A transactions.

The assumption changes described above were relatively larger in the Specialty Contractors reporting unit than in the Civil or Building reporting units, as Specialty Contractors had not met recent market expectations at the time of the Interim Test.

Intangible Assets

Intangible assets consist of the following:

	As of December 31, 2020								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(23,754)		(23,232)		27,364		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(22,103)		(16,645)		1,052		12 years
Construction contract backlog	149,290		(105,001)		—		44,289		3 years
Total	$	387,040	$	(150,858)	$	(113,067)	$	123,115

	As of December 31, 2019								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(21,267)		(23,232)		29,851		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(21,048)		(16,645)		2,107		12 years
Construction contract backlog	149,290		(76,388)		—		72,902		3 years
Total	$	387,040	$	(118,703)	$	(113,067)	$	155,270

The Company performs its annual quantitative impairment assessment during the fourth quarter of each year for non-amortizable trade names. If the estimated fair value for the non-amortizable trade names exceeds their respective net book

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

values, no impairment charge is necessary. Other amortizable intangible assets are reviewed for impairment whenever circumstances indicate that the future cash flows generated by the assets might be less than the assets’ net carrying value. The Company had no impairment of intangible assets during the years ended December 31, 2020 or 2019.

Amortization expense related to amortizable intangible assets was $32.2 million and $6.2 million for the years ended December 31, 2020 and 2019, respectively. The increase in accumulated amortization for construction contract backlog was due to the acquisition of an additional interest in a joint venture during the fourth quarter of 2019, as discussed in Note 12. Future amortization expense related to amortizable intangible assets for the years 2021 and 2022 will be approximately $32.4 million and $17.9 million, respectively, $2.5 million for the years 2023, 2024 and 2025, and $14.9 million thereafter.

7.    Financial Commitments

Long-Term Debt

Long-term debt as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
2017 Senior Notes	$	495,271	$	494,365
Term Loan B	408,458		N/A
2020 Revolver	—		N/A
2017 Credit Facility	N/A		114,000
Convertible Notes(a)	67,878		182,292
Equipment financing and mortgages	47,594		39,159
Other indebtedness	6,264		4,660
Total debt	1,025,465		834,476
Less: Current maturities	100,188		124,054
Long-term debt, net	$	925,277	$	710,422

_____________________________________________________________________________________________________________

(a)The Company will repurchase or retire the remaining Convertible Notes at or before their June 15, 2021 maturity using proceeds from the Term Loan B, $69.9 million of which is currently held in a restricted cash account for this purpose.

The following table reconciles the outstanding debt balances to the reported debt balances as of December 31, 2020 and 2019:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Outstanding Debt		Unamortized Discounts and Issuance Costs		Debt, as reported		Outstanding Debt		Unamortized Discount and Issuance Costs		Debt, as reported
2017 Senior Notes	$	500,000	$	(4,729)	$	495,271	$	500,000	$	(5,635)	$	494,365
Term Loan B	423,938		(15,480)		408,458		N/A		N/A		N/A
Convertible Notes	69,918		(2,040)		67,878		200,000		(17,708)		182,292

The unamortized issuance costs related to the 2020 Revolver were $2.6 million as of December 31, 2020 and are included in other assets on the Consolidated Balance Sheets. The unamortized issuance costs related to the 2017 Credit Facility, which was terminated on August 18, 2020 (as discussed below) were $3.7 million as of December 31, 2019 and were included in other assets on the Consolidated Balance Sheets.

2020 Credit Agreement

On August 18, 2020, the Company entered into a new credit agreement (the “2020 Credit Agreement”) with BMO Harris Bank N.A., as Administrative Agent, Swing Line Lender and L/C Issuer and other lenders. The 2020 Credit Agreement provides for a $425.0 million term loan B facility (the “Term Loan B”) and a $175.0 million revolving credit facility (the “2020 Revolver”), with sublimits for the issuance of letters of credit and swing line loans up to the aggregate amounts of $75.0 million and $10.0 million, respectively. The Term Loan B will mature on August 18, 2027 and the 2020 Revolver will mature on August 18, 2025, in each case, unless any of the 2017 Senior Notes are outstanding on January 30, 2025 (which is 91 days prior

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

to the maturity of the 2017 Senior Notes), in which case, both the Term Loan B and the 2020 Revolver will mature on January 30, 2025 (subject to certain further exceptions).

The 2020 Credit Agreement permits the Company to repay any or all borrowings outstanding under the 2020 Credit Agreement at any time prior to maturity without penalty, except that the Company must pay a 1.00% premium in respect to the Term Loan B in connection with any transactions that reduce the yield applicable to the Term Loan B within the first twelve months after August 18, 2020 (subject to certain further exceptions). The 2020 Credit Agreement requires the Company to make regularly scheduled payments of principal on the Term Loan B in quarterly installments equal to 0.25% of the initial principal amount of the Term Loan B. The 2020 Credit Agreement also requires the Company to make prepayments on the Term Loan B in connection with certain asset sales, receipts of insurance proceeds, incurrences of unpermitted indebtedness and annual excess cash flow (subject to certain exceptions).

Subject to certain exceptions, at any time prior to maturity, the 2020 Credit Agreement provides the Company with the right to increase the commitments under the 2020 Revolver and/or to establish one or more term loan facilities in an aggregate amount up to (i) the greater of $173.5 million and 50% LTM EBITDA (as defined in the 2020 Credit Agreement) plus (ii) additional amounts if (A) in the case of pari passu first lien secured indebtedness, the First Lien Net Leverage Ratio (as defined in the 2020 Credit Agreement) does not exceed 1.35:1.00, (B) in the case of junior lien secured indebtedness, the Total Net Leverage Ratio (as defined in the 2020 Credit Agreement) does not exceed 3.50:1.00 and (C) in the case of unsecured indebtedness, (x) the Total Net Leverage Ratio does not exceed 3.50:1.00 or (y) the Fixed Charge Coverage Ratio (as defined in the 2020 Credit Agreement) is no less than 2.00:1.00.

Borrowings under the 2020 Credit Agreement bear interest, at the Company’s option, at a rate equal to (i) (a) LIBOR or (b) a base rate (determined by reference to the highest of (1) the administrative agent’s prime lending rate, (2) the federal funds effective rate plus 50 basis points and (3) the LIBOR rate for a one-month interest period plus 100 basis points) plus, (ii) an applicable margin. The margin applicable to the Term Loan B is between 4.50% and 4.75% for LIBOR and between 3.50% and 3.75% for base rate (which was initially 4.75% for LIBOR and 3.75% for base rate), and, in each case, is based on the Total Net Leverage Ratio. The margin applicable to the 2020 Revolver is between 4.25% and 4.75% for LIBOR and 3.25% and 3.75% for base rate (which was initially 4.75% for LIBOR and 3.75% for base rate), and, in each case, is based on the First Lien Net Leverage Ratio. In addition to paying interest on outstanding principal under the 2020 Credit Agreement, the Company will pay a commitment fee to the lenders under the 2020 Revolver in respect of the unutilized commitments thereunder. The Company will pay customary letter of credit fees. If a payment or bankruptcy event of default occurs and is continuing, the otherwise applicable margin on overdue amounts will be increased by 2% per annum. The agreement includes provisions for the replacement of LIBOR with an alternative benchmark rate in the event LIBOR is discontinued. The weighted-average annual interest rate on borrowings under the 2020 Revolver was 6.74% during the year ended December 31, 2020.

The 2020 Credit Agreement requires, with respect to the 2020 Revolver only, the Company and its restricted subsidiaries to maintain a maximum First Lien Net Leverage Ratio range of 2.75:1:00, stepping down to 2.25:1.00 beginning the quarter ending March 31, 2022. The 2020 Credit Agreement also includes certain customary representations and warranties, affirmative covenants and events of default. Subject to certain exceptions, substantially all of the Company’s existing and future material wholly-owned subsidiaries unconditionally guarantee the obligations of the Company under the 2020 Credit Agreement; additionally, subject to certain exceptions, the obligations are secured by a lien on substantially all of the assets of the Company and its subsidiaries guaranteeing these obligations.

As of December 31, 2020, the entire $175 million was available under the 2020 Revolver and the Company had not utilized the 2020 Revolver for letters of credit. The Company was in compliance with the financial covenants under the 2020 Credit Agreement for the period ended December 31, 2020.

Termination of 2017 Credit Facility

On April 20, 2017, the Company entered into a credit agreement (the “2017 Credit Facility”) with SunTrust Bank, now known as Truist Bank, as Administrative Agent, Swing Line Lender and L/C Issuer and a syndicate of other lenders. The 2017 Credit Facility provided for a $350 million revolving credit facility (the “2017 Revolver”) and a sublimit for the issuance of letters of credit and swing line loans up to the aggregate amount of $150 million and $10 million, respectively, both maturing on April 20, 2022 unless any of the Convertible Notes, as defined below, were outstanding on December 17, 2020, in which case all such borrowings would have matured on December 17, 2020 (the “spring-forward provision”).

On August 18, 2020, the Company used proceeds from the Term Loan B to repay outstanding amounts under the 2017 Credit Facility. As a result of repaying the outstanding amounts under the 2017 Credit Facility and entering into the 2020 Credit Agreement, the Company terminated the 2017 Credit Facility, including its spring-forward provision that would have accelerated the maturity of the facility to December 17, 2020.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The weighted-average annual interest rate on borrowings under the 2017 Revolver was 3.55% during the year ended December 31, 2020. At December 31, 2019, the balance outstanding on the 2017 Revolver of $114 million was included in “Current maturities of long-term debt” on the Consolidated Balance Sheet.

Convertible Notes

On June 15, 2016, the Company issued $200 million of 2.875% Convertible Senior Notes due June 15, 2021 (the “Convertible Notes”) in a private placement offering. On August 19, 2020, the Company used proceeds from the Term Loan B to repurchase $130.1 million aggregate principal amount of the Convertible Notes for an aggregate purchase price of $132.4 million (including accrued and unpaid interest to the repurchase date). At December 31, 2020, $69.9 million ($67.9 million net of unamortized discount and debt issuance costs) of the Convertible Notes remain outstanding and are included in “Current maturities of long-term debt” on the Consolidated Balance Sheet. The Company will repurchase or retire at or before maturity the remaining Convertible Notes and repay the principal balance using proceeds from the Term Loan B, which are currently held in a restricted cash account for this purpose.

The Convertible Notes are unsecured obligations of the Company and do not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company. The Convertible Notes bear interest at a rate of 2.875% per year, payable in cash semi-annually in June and December.

To account for the Convertible Notes, the Company applied the provisions of ASC 470-20, Debt with Conversion and Other Options (“ASC 470-20”). ASC 470-20 requires issuers of certain convertible debt instruments that may be settled in cash upon conversion to separately account for the liability (debt) and equity (conversion option) components of the instrument in a manner that reflects the issuer’s nonconvertible debt borrowing rate. This is done by allocating the proceeds from issuance to the liability component based on the fair value of the debt instrument excluding the conversion feature, with the residual allocated to the equity component and classified in additional paid in capital. The $46.8 million difference between the initial principal amount of the Convertible Notes ($200.0 million) and the proceeds initially allocated to the liability component ($153.2 million) is treated as a discount on the Convertible Notes. This difference is being amortized as non-cash interest expense using the interest method, as shown below under Interest Expense. The equity component, however, is not subject to amortization nor subsequent remeasurement.

In addition, ASC 470-20 requires that the debt issuance costs associated with a convertible debt instrument be allocated between the liability and equity components in proportion to the allocation of the debt proceeds between these two components. The debt issuance costs attributable to the liability component of the Convertible Notes ($5.1 million) are also treated as a discount on the Convertible Notes and amortized as non-cash interest expense. The debt issuance costs attributable to the equity component ($1.5 million) were netted with the equity component and are not amortized.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table presents information related to the liability and equity components of the Convertible Notes:

(in thousands)	December 31, 2020		December 31, 2019
Liability component:
Principal	$	69,918	$	200,000
Conversion feature	(46,800)		(46,800)
Allocated debt issuance costs	(5,051)		(5,051)
Amortization and extinguishment of discount and debt issuance costs (non-cash interest expense)	49,811		34,143
Net carrying amount	$	67,878	$	182,292
Equity component:
Conversion feature	$	46,800	$	46,800
Reacquisition of conversion option from repurchase of notes, net of tax	(764)		—
Allocated debt issuance costs	(1,543)		(1,543)
Deferred taxes	(18,815)		(18,815)
Net carrying amount	$	25,678	$	26,442

Prior to January 15, 2021, the Convertible Notes were convertible only under certain circumstances including upon the occurrence of specified corporate events. The holders did not convert any of the Convertible Notes prior to January 15, 2021. On or after January 15, 2021 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances.

The Convertible Notes are convertible at an initial conversion rate of 33.0579 shares of the Company’s common stock per $1,000 principal amount of the Convertible Notes, which is equivalent to an initial conversion price of approximately $30.25. The conversion rate will be subject to adjustment for some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date, the Company is required to increase, in certain circumstances, the conversion rate for a holder who elects to convert their Convertible Notes in connection with such a corporate event including customary conversion rate adjustments in connection with a “make-whole fundamental change” described in the indenture. Upon conversion, and at the Company’s election, the Company may satisfy its conversion obligation with cash, shares of its common stock or a combination thereof. As of December 31, 2020, the conversion provisions of the Convertible Notes have not been triggered and none of the notes have been converted.

2017 Senior Notes

On April 20, 2017, the Company issued $500 million in aggregate principal amount of 6.875% Senior Notes due May 1, 2025 (the “2017 Senior Notes”) in a private placement offering. Interest on the 2017 Senior Notes is payable in arrears semi-annually in May and November of each year, beginning in November 2017.

Prior to May 1, 2020, the Company could have redeemed the 2017 Senior Notes under certain conditions described in the agreement. Since May 1, 2020, the Company may redeem the 2017 Senior Notes at specified redemption prices described in the indenture. Upon a change of control, holders of the 2017 Senior Notes may require the Company to repurchase all or part of the 2017 Senior Notes at 101% of the principal amount thereof, plus accrued and unpaid interest to the redemption date.

The 2017 Senior Notes are senior unsecured obligations of the Company and are guaranteed by substantially all of the Company’s existing and future subsidiaries that also guarantee obligations under the Company’s 2020 Credit Agreement, as defined above. In addition, the indenture for the 2017 Senior Notes provides for customary covenants, including events of default and restrictions on the payment of dividends and share repurchases.

Equipment Financing and Mortgages

The Company has certain loans entered into for the purchase of specific property, plant and equipment and secured by the assets purchased. The aggregate balance of equipment financing loans was approximately $36.9 million and $27.7 million at December 31, 2020 and 2019, respectively, with interest rates ranging from 2.74% to 3.89% with equal monthly installment

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

payments over periods up to 7 years with balloon payments of $12.4 million in 2021 and $6.3 million in 2022. The aggregate balance of mortgage loans was approximately $10.7 million and $11.5 million at December 31, 2020 and 2019, respectively, with interest rates ranging from LIBOR plus 3% to a fixed 3.50% and equal monthly installment payments over periods up to 10 years with balloon payments of $2.9 million in 2021 and $6.8 million in 2023.

The following table presents the future principal payments required under all of the Company’s debt obligations, discussed above:

Year (in thousands)
2021	$	102,228
2022	14,822
2023	14,282
2024	7,498
2025	506,156
Thereafter	402,728
	1,047,714
Less: Unamortized discount and issuance costs	22,249
Total	$	1,025,465

Interest Expense

Interest expense as reported in the Consolidated Statements of Operations consisted of the following:

	For the year ended December 31,
(in thousands)	2020		2019		2018
Cash interest expense:
Interest on 2017 Senior Notes	$	34,375	$	34,375	$	34,375
Interest on Term Loan B	9,028		N/A		N/A
Interest on 2020 Revolver	77		N/A		N/A
Interest on 2017 Credit Facility	5,341		11,990		8,575
Interest on Convertible Notes	4,373		5,750		5,750
Other interest	2,079		2,172		2,747
Cash portion of loss on extinguishment	786		—		—
Total cash interest expense	56,059		54,287		51,447
Non-cash interest expense(a):
Amortization of discount and debt issuance costs on Convertible Notes	8,944		10,811		9,846
Amortization of discount and debt issuance costs on Term Loan B	784		N/A		N/A
Amortization of debt issuance costs on 2020 Revolver	206		N/A		N/A
Amortization of debt issuance costs on 2017 Credit Facility	1,001		1,552		1,439
Amortization of debt issuance costs on 2017 Senior Notes	906		844		787
Non-cash portion of loss on extinguishment	8,312		—		—
Total non-cash interest expense	20,153		13,207		12,072
Total interest expense	$	76,212	$	67,494	$	63,519

_____________________________________________________________________________________________________________

(a)The combination of cash and non-cash interest expense produces effective interest rates that are higher than contractual rates. Accordingly, the effective interest rates for the 2017 Senior Notes, Term Loan B and the Convertible Notes were 7.13%, 6.49% and 9.39%, respectively, for the year ended December 31, 2020.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

8.    Commitments and Contingencies

The Company and certain of its subsidiaries are involved in litigation and other legal proceedings and forms of dispute resolution in the ordinary course of business, including but not limited to disputes over contract payment and/or performance-related issues (such as disagreements regarding delay or a change in the scope of work of a project and/or the price associated with that change) and other matters incidental to the Company’s business. In accordance with ASC 606, the Company makes assessments of these types of matters on a routine basis and, to the extent permitted by ASC 606, estimates and records recovery related to these matters as a form of variable consideration at the most likely amount the Company expects to receive, as discussed further in Note 1(d) and Note 4. In addition, the Company is contingently liable for litigation, performance guarantees and other commitments arising in the ordinary course of business, which are accounted for in accordance with ASC 450, Contingencies. Management reviews these matters regularly and updates or revises its estimates as warranted by subsequent information and developments. These assessments require judgments concerning matters that are inherently uncertain, such as litigation developments and outcomes, the anticipated outcome of negotiations and the estimated cost of resolving disputes. Consequently, these assessments are estimates, and actual amounts may vary from such estimates. In addition, because such matters are typically resolved over long periods of time, the Company’s assets and liabilities may change over time should the circumstances dictate. The description of the legal proceedings listed below include management’s assessment of those proceedings. Management believes that, based on current information and discussions with the Company’s legal counsel, the ultimate resolution of other matters is not expected to have a material effect on the Company’s consolidated financial position, results of operations or cash flows.

A description of the material pending legal proceedings, other than ordinary routine litigation incidental to the business is as follows:

Five Star Electric Matter

In the third quarter of 2015, Five Star Electric Corp. (“Five Star”), a wholly owned subsidiary of the Company that was acquired in 2011, entered into a tolling agreement (which has since expired) related to an ongoing investigation being conducted by the United States Attorney’s Office for the Eastern District of New York (“USAO EDNY”). Five Star has been cooperating with the USAO EDNY since late June 2014, when it was first made aware of the investigation, and has provided information requested by the government related to its use of certain minority-owned, women-owned, small and disadvantaged business enterprises and certain of Five Star’s employee compensation, benefit and tax practices.

As of December 31, 2020, the Company cannot predict the ultimate outcome of the investigation and cannot reasonably estimate the potential loss or range of loss that Five Star or the Company may incur or the impact of the results of the investigation on Five Star or the Company.

Alaskan Way Viaduct (SR 99) Matter

In January 2011, Seattle Tunnel Partners (“STP”), a joint venture between Dragados USA, Inc. and the Company, entered into a design-build contract with the Washington State Department of Transportation (“WSDOT”) for the construction of a large-diameter bored tunnel in downtown Seattle, King County, Washington to replace the Alaskan Way Viaduct, also known as State Route 99. The Company has a 45% interest in STP.

The construction of the large-diameter bored tunnel required the use of a tunnel boring machine (“TBM”). In December 2013, the TBM struck a steel pipe, installed by WSDOT as a well casing for an exploratory well. The TBM was significantly damaged and was required to be repaired. STP has asserted that the steel pipe casing was a differing site condition that WSDOT failed to properly disclose. The Disputes Review Board mandated by the contract to hear disputes issued a decision finding the steel casing was a Type I (material) differing site condition. WSDOT did not accept that finding.

The TBM was insured under a Builder’s Risk Insurance Policy (the “Policy”) with Great Lakes Reinsurance (UK) PLC and a consortium of other insurers (the “Insurers”). STP submitted the claims to the Insurers and requested interim payments under the Policy. The Insurers refused to pay and denied coverage. In June 2015, STP filed a lawsuit in the King County Superior Court, State of Washington seeking declaratory relief concerning contract interpretation, as well as damages as a result of the Insurers’ breach of their obligations under the terms of the Policy. STP is also asserting extra-contractual and statutory claims against the Insurers. WSDOT is deemed a plaintiff since WSDOT is an insured under the Policy and had filed its own claim for damages. Hitachi Zosen (“Hitachi”), the manufacturer of the TBM, joined the case as a plaintiff for costs incurred to repair the damages to the TBM.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In September 2018, rulings received on pre-trial motions effectively limited potential recovery under the Policy for STP, WSDOT and Hitachi. However, on December 19, 2018, the Court of Appeal granted the Company’s request for a discretionary appeal of those rulings. The appeal is expected to be heard in early 2021. STP submitted damages to the Insurers in the King County lawsuit in the amount of $532 million. STP also sought these damages from WSDOT related to the pipe-strike by the TBM in a related lawsuit in Thurston County (see following paragraph).

In March 2016, WSDOT filed a complaint against STP in Thurston County Superior Court alleging breach of contract, seeking $57.2 million in delay-related damages and seeking declaratory relief concerning contract interpretation. STP filed its answer to WSDOT’s complaint and filed a counterclaim against WSDOT and Hitachi, as the TBM designer, seeking damages of $667 million. On October 3, 2019, STP and Hitachi entered into a settlement agreement which released and dismissed the claims that STP and Hitachi had against each other. The jury trial between STP and WSDOT commenced on October 7, 2019 and concluded on December 13, 2019, with a jury verdict in favor of WSDOT awarding them $57.2 million in damages. Judgment was entered on January 10, 2020, and a notice of appeal was filed by STP on January 17, 2020. The appeal is expected to be heard in late 2021.

The Company recorded the impact of the jury verdict during the fourth quarter of 2019, resulting in a pre-tax charge of $166.8 million. The charge includes a pre-tax accrual of $25.7 million (which is the Company’s 45% proportionate share of the $57.2 million in damages awarded by the jury to WSDOT). Payment of damages will only be made if the adverse verdict is upheld on appeal, as the payment is secured by a bond for the course of the appeal. Other than the possible future payment in cash of $25.7 million in damages, the charge was for non-cash write-downs primarily related to the costs and estimated earnings in excess of billings and receivables that the Company previously recorded to reflect its expected recovery in this case.

With respect to STP’s direct and indirect claims against the Insurers, management has included in receivables an estimate of the total anticipated recovery concluded to be probable.

George Washington Bridge Bus Station Matter

In August 2013, Tutor Perini Building Corp. (“TPBC”) entered into a contract with the George Washington Bridge Bus Station Development Venture, LLC (the “Developer”) to renovate the George Washington Bridge Bus Station, a mixed-use facility owned by the Port Authority of New York and New Jersey (the “Port Authority”) that serves as a transit facility and retail space. The $100 million project experienced significant design errors and associated delays, resulting in damages to TPBC and its subcontractors, including WDF and Five Star, wholly owned subsidiaries of the Company. The project reached substantial completion on May 16, 2017.

On February 26, 2015, the Developer filed a demand for arbitration, subsequently amended, seeking $30 million in alleged damages and declaratory relief that TPBC’s requests for additional compensation are invalid due to lack of notice. TPBC denied the Developer’s claims and filed a counterclaim in March 2018. TPBC seeks in excess of $113 million in the arbitration, which includes unpaid contract balance claims, the return of $29 million retained by the Developer in alleged damages, as well as extra work claims, pass-through claims and delay claims.

Hearings on the merits commenced on September 24, 2018 before the arbitration panel. On June 4, 2019, the arbitration panel, as confirmed by the U.S. District Court in the Southern District of New York, issued a writ of attachment for $23 million of the $29 million discussed above. On October 7, 2019, the Developer filed for bankruptcy protection in the Southern District of New York under Chapter 11 of the Bankruptcy Code. The filing for bankruptcy stayed the pending arbitration proceedings. TPBC appeared in the bankruptcy proceedings on October 8, 2019 and filed a Proof of Claim in the amount of $113 million on December 13, 2019.

On June 5, 2020, the Developer, secured lenders and the Port Authority announced that they had reached a settlement of their disputes. As part of the settlement, the Port Authority waived the enforcement of its right to seek a “cure” pursuant to its lease agreement with the Developer which requires construction costs be paid prior to any sale of the leasehold, the sole asset in the Developer’s bankruptcy estate to be distributed in this bankruptcy. On July 14, 2020, the bankruptcy court conducted a hearing to determine (1) whether to approve the settlement agreement between the Developer, secured lenders and the Port Authority; and (2) whether TPBC can assert third-party beneficiary rights to the lease agreement and require that prior to the sale of the leasehold, any outstanding costs owed to contractors for the cost of building the project must be paid pursuant to the lease agreement’s “cure” provisions. On August 12, 2020, the bankruptcy court approved the settlement and denied TPBC’s third-party beneficiary rights under the lease agreement. On August 20, 2020, TPBC filed an appeal with the U.S. District Court for the Southern District of New York seeking to challenge the denial of its third-party beneficiary rights under the lease agreement’s “cure” provisions to avoid being subordinate to the claims of the secured lenders in the bankruptcy proceedings.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Separately, on July 2, 2018, TPBC filed a lawsuit against the Port Authority, as owner of the project, seeking the same $113 million in damages pursuant to the lease agreement between the Port Authority and the Developer. On August 20, 2018, the Port Authority filed a motion to dismiss all causes of action, which was denied by the court on July 1, 2019. The Port Authority appealed this decision on July 15, 2019. On February 18, 2021, the Appellate Division affirmed in part and reversed in part the trial court's denial of the Port Authority's motion to dismiss TPBC’s causes of action.

On January 27, 2020, TPBC filed separate litigation in the U.S. District Court for the Southern District of New York in which TPBC asserted related claims against individual owners of the Developer for their wrongful conversion of project funds and against certain lenders that received interest payments from project funds and other amounts earmarked to pay the contractors. On June 1, 2020, the defendants filed motions to dismiss. On December 29, 2020, the District Court ordered that limited discovery take place before it decides the merits of the motions to dismiss.

As of December 31, 2020, the Company has concluded that the potential for a material adverse financial impact due to the Developer’s claims is remote. With respect to TPBC’s claims against the Developer, its owners, certain lenders and the Port Authority, management has made an estimate of the total anticipated recovery on this project, and such estimate is included in revenue recorded to date.

9.    Leases

The Company leases certain office space, construction and office equipment, vehicles and temporary housing generally under non-cancelable operating leases. Leases with an initial term of one year or less are not recorded on the balance sheet, and the Company generally recognizes lease expense for these leases on a straight-line basis over the lease term. As of December 31, 2020, the Company’s operating leases have remaining lease terms ranging from less than one year to 18 years, some of which include options to renew the leases. The exercise of lease renewal options is generally at the Company’s sole discretion. The Company’s leases do not contain any material residual value guarantees or material restrictive covenants.

The Company determines if an arrangement is a lease at inception. Operating lease ROU assets are included in other assets, while current and long-term operating lease liabilities are included in accrued expenses and other current liabilities, and other long-term liabilities, respectively, on the Consolidated Balance Sheet as of December 31, 2020. ROU 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. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The present value of future lease payments are discounted using either the implicit rate in the lease, if known, or the Company’s incremental borrowing rate for the specific lease as of the lease commencement date. The ROU asset is also adjusted for any prepayments made or incentives received. The lease terms include options to extend or terminate the lease only to the extent it is reasonably certain any of those options will be exercised. Lease expense is recognized on a straight-line basis over the lease term. The Company accounts for lease components (e.g., fixed payments) separate from the non-lease components (e.g., common-area maintenance costs). The Company does not have any material financing leases.

The following table presents components of lease expense for the years ended December 31, 2020 and 2019:

	For the year ended December 31,
(in thousands)	2020		2019
Operating lease expense	$	14,547	$	15,854
Short-term lease expense(a)	87,969		72,562
	102,516		88,416
Less: Sublease income	1,026		1,077
Total lease expense	$	101,490	$	87,339

(a)Short-term lease expense includes all leases with lease terms ranging from less than one month to one year. Short-term leases include, among other things, construction equipment rented on an as-needed basis as well as temporary housing.

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table presents supplemental balance sheet information related to operating leases:

		As of December 31,
(dollars in thousands)	Balance Sheet Line Item	2020			2019
Assets
ROU assets	Other assets	$	55,897		$	40,156
Total lease assets		$	55,897		$	40,156
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	7,661		$	11,392
Long-term lease liabilities	Other long-term liabilities	51,336			31,900
Total lease liabilities		$	58,997		$	43,292
Weighted-average remaining lease term		12.5 years			5.0 years
Weighted-average discount rate		9.22		%	5.96		%

The following table presents supplemental cash flow information and non-cash activity related to operating leases:

	As of December 31,
(in thousands)	2020		2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(14,591)	$	(15,658)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	29,244	$	9,784

The following table presents maturities of operating lease liabilities on an undiscounted basis as of December 31, 2020:

Year (in thousands)	Operating Leases
2021	$	12,512
2022	10,528
2023	7,723
2024	6,141
2025	5,354
Thereafter	65,633
Total lease payments	107,891
Less: Imputed interest	48,894
Total	$	58,997

10.    Share-Based Compensation

On April 10, 2018, the Company adopted the Tutor Perini Corporation Omnibus Incentive Plan (the “Current Plan”), which was approved by the Company’s shareholders on May 23, 2018. The Current Plan effected the merger of the Company’s Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan, as amended and restated on October 2, 2014 (the “2014 Plan”) and the Tutor Perini Corporation Incentive Compensation Plan adopted on April 3, 2017 (the “2017 Plan,” together with the 2014 Plan and the Current Plan, the “Plans”). The Current Plan provides for various types of share-based grants, including restricted and unrestricted stock units and stock options. Restricted and unrestricted stock units give the holder the right to exchange their stock units for shares of the Company’s common stock on a one-for-one basis. Stock options give the holder the right to purchase shares of the Company’s common stock subsequent to the vesting date at a defined exercise price. A stock option exercise price must be equal to or greater than the fair value of the Company’s common stock on the date of the award. Restricted stock units and stock options are usually subject to certain service and performance conditions as well as other restrictions. The term for stock options is limited to 10 years from the award date. As of December 31, 2020, there were 1,539,172 shares of common stock available for grant under the Company’s Current Plan. As of December 31, 2020, the Plans had an aggregate of 3,310,265 of restricted stock units and stock options from outstanding, historical awards that either have not vested or have vested but have not been exercised. Any awards that were granted under the 2014 Plan or the 2017 Plan that are forfeited, cancelled or held back for net settlement will become available to be issued under the Current Plan.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The terms of the Plans give the Company the right to settle the vesting of share-based grants in cash or shares.

Many of the awards issued under the Plans contain separate tranches, each for a separate performance period and each with a performance target to be established subsequent to the award date; accordingly, the tranches are accounted for under ASC 718, Stock Compensation (“ASC 718”) as separate grants, with the grant date being the date the performance targets for a given tranche are established and communicated to the grantee. Similarly, for these awards, compliance with the requirements of the Plans is also based on the number of units granted in a given year, as determined by ASC 718, rather than the number of units awarded in a given year.

The following table summarizes restricted stock unit and stock option activity:

	Restricted Stock Units			Stock Options
	Number	Weighted- Average Grant Date Fair Value Per Share		Number	Weighted- Average Exercise/ (Strike) Price Per Share
Outstanding as of December 31, 2017	1,397,984	$	30.11	2,554,034	$	20.45
Granted	699,000	24.21		664,000	23.20
Expired or cancelled	(240,289)	32.76		(274,990)	22.82
Vested/exercised	(387,695)	28.67		—	—
Outstanding as of December 31, 2018	1,469,000	$	27.27	2,943,044	$	20.89
Granted	530,000	20.23		220,000	19.66
Expired or cancelled	(104,029)	28.98		(884,029)	21.03
Vested/exercised	(179,971)	25.39		—	—
Outstanding as of December 31, 2019	1,715,000	$	25.19	2,279,015	$	20.62
Granted	245,000	20.67		165,000	19.24
Expired or cancelled	(403,750)	25.52		(168,750)	25.87
Vested/exercised	(521,250)	29.44		—	—
Outstanding as of December 31, 2020	1,035,000	$	21.85	2,275,265	$	20.13

Included in the above table are certain restricted stock unit grants which are classified as liabilities in accordance with ASC 718 because they contain a guaranteed minimum payout. These awards may be performance-based or time-based and may be settled in shares of the Company's stock, cash or a combination thereof, at the Company's discretion. As of December 31, 2020 and 2019, there were 270,000 and 390,000 restricted stock units with guaranteed minimum payouts outstanding, with weighted-average grant date fair values per share of $27.80 and $27.89, respectively. The Company recognized liabilities for these awards totaling approximately $2.4 million and $2.9 million as of December 31, 2020 and 2019, respectively. During 2020, the Company paid approximately $0.3 million to settle these awards, and there were no cash settlements in 2019 or 2018.

The following table summarizes unrestricted stock units, which are generally issued to the non-employee members of the Company’s Board of Directors as part of their annual retainer fees:

	Unrestricted Stock Units
Year	Number	Weighted-Average Grant Date Fair Value Per Share
2018	115,420	$	21.26
2019	98,591	15.72
2020	194,177	8.60

Unrestricted stock units vest immediately upon grant and are converted to shares of the Company’s stock on a one-for-one basis. The fair value of unrestricted stock units issued during 2020, 2019 and 2018 was approximately $1.7 million, $1.5 million and $2.5 million, respectively.

The fair value of restricted stock units that vested during 2020, 2019 and 2018 was approximately $4.1 million, $3.1 million and $7.9 million, respectively. As of December 31, 2020, the balance of unamortized restricted stock and stock option expense was $9.0 million and $2.3 million, respectively, which is expected to be recognized over weighted-average periods of 2.0 years for restricted stock units and 2.0 years for stock options.

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The 2,275,265 outstanding stock options as of December 31, 2020 had an intrinsic value of $0.9 million and a weighted-average remaining contractual life of 4.6 years. Of those outstanding options: (1) 1,715,265 were exercisable with an intrinsic value of $0.9 million, a weighted-average exercise price of $20.43 per share and a weighted-average remaining contractual life of 3.5 years; (2) 560,000 have not vested and have no intrinsic value, a weighted-average exercise price of $19.21 per share and a weighted-average remaining contractual life of 8.1 years. The 560,000 unvested stock options include 328,125 with time-based or market-based vesting conditions that are expected to vest, as well as 231,875 with market-based vesting conditions that are not expected to vest.

The fair value of restricted and unrestricted stock units is based on the closing price of the Company’s common stock on the New York Stock Exchange on the date of the grant and the fair value of stock options is based on the Black-Scholes model. Certain performance-based awards contain market condition components tied to the Company’s total shareholder return in relation to its peer companies, as calculated over a multi-year performance period (“TSR awards”). The fair value of the TSR awards is determined using a Monte Carlo simulation model. Significant assumptions used in this simulation model include the Company’s expected volatility, a risk-free rate based on U.S. Treasury yield curve rates with maturities consistent with the performance period, and the volatilities for each of the Company’s peers. The ultimate payout on TSR awards is determined at the end of the performance period and will vary based on actual total shareholder return performance results. Compensation expense related to the TSR awards is recognized regardless of whether the market condition is satisfied, provided that the requisite service period has been completed.

The fair value on the grant date and the significant assumptions used in the Black-Scholes option-pricing model are as follows:

	Year Ended December 31,
	2020			2019			2018
Total stock options granted	165,000			220,000			664,000
Weighted-average grant date fair value	$	7.67		$	7.59		$	11.09
Weighted-average assumptions:
Risk-free rate	1.2		%	2.1		%	2.6		%
Expected life of options(a)	6.3 years			6.1 years			5.8 years
Expected volatility(b)	60.7		%	39.4		%	42.2		%
Expected quarterly dividends	$	—		$	—		$	—

_____________________________________________________________________________________________________________

(a)Calculated using the simplified method due to the terms of the stock options and the limited pool of grantees.

(b)Calculated using historical volatility of the Company’s common stock over periods commensurate with the expected life of the option.

For the respective years ended December 31, 2020, 2019 and 2018, the Company recognized, as part of general and administrative expenses, costs for share-based payment arrangements for employees of $10.2 million, $17.5 million and $21.1 million. Additionally for the same periods, the Company recognized as part of general and administrative expenses costs for share-based awards to non-employee directors of $1.6 million, $1.6 million and $1.7 million, respectively. The aggregate tax benefits for these awards were approximately $1.3 million, $2.9 million and $3.8 million, for the respective periods.

11.    Employee Benefit Plans

Defined Benefit Pension Plan

The Company has a defined benefit pension plan that covers certain of its executive, professional, administrative and clerical employees, subject to certain specified service requirements. The pension plan is noncontributory and benefits are based on an employee’s years of service and “final average earnings,” as defined by the pension plan. The pension plan provides reduced benefits for early retirement and takes into account offsets for social security benefits. The Company also has an unfunded supplemental retirement plan (“Benefit Equalization Plan”) for certain employees whose benefits under the defined benefit pension plan were reduced because of compensation limitations under federal tax laws. Effective June 1, 2004, all benefit accruals under the Company’s pension plan and Benefit Equalization Plan were frozen; however, the current vested benefit was preserved. Pension disclosure as presented below includes aggregated amounts for both of the Company’s plans, except where otherwise indicated.

The Company historically has used the date of its year-end as its measurement date to determine the funded status of the pension plan.

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The long-term investment goals of the Company’s pension plan are to manage the assets in accordance with the legal requirements of all applicable laws; produce investment returns which maximize return within reasonable and prudent levels of risks; and achieve a fully funded status with regard to current pension liabilities. Some risk must be assumed in order to achieve the investment goals. Investments with the ability to withstand short and intermediate term variability are considered and some interim fluctuations in market value and rates of return are tolerated in order to achieve the pension plan’s longer-term objectives.

The pension plan’s assets are managed by a third-party investment manager. The Company monitors investment performance and risk on an ongoing basis.

The following table sets forth a summary of net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
(in thousands)	2020			2019			2018
Interest cost	$	3,032		$	3,801		$	3,496
Service cost	925			900			875
Expected return on plan assets	(4,022)			(4,170)			(4,302)
Recognized net actuarial losses	2,407			1,933			2,067
Net periodic benefit cost	$	2,342		$	2,464		$	2,136
Actuarial assumptions used to determine net cost:
Discount rate	3.07		%	4.12		%	3.45		%
Expected return on assets	5.75		%	5.75		%	6.00		%
Rate of increase in compensation	N/A			N/A			N/A

The target asset allocation for the Company’s pension plan by asset category for 2021 and the actual asset allocation as of December 31, 2020 and 2019 by asset category are as follows:

	Percentage of Plan Assets as of December 31,
	Target Allocation 2021
			Actual Allocation
Asset Category			2020		2019
Cash	5	%	5	%	4	%
Equity funds:
Domestic	35		34		47
International	15		17		18
Fixed income funds	45		44		31
Total	100	%	100	%	100	%

The Company expects to contribute approximately $4.0 million to its defined benefit pension plan in 2021.

Future benefit payments under the plans are estimated as follows:

(in thousands)
Year ended December 31,
2021	$	6,800
2022	6,746
2023	6,657
2024	6,617
2025	6,526
2026-2030	30,704
Total	$	64,050

F-38

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following tables provide a reconciliation of the changes in the fair value of plan assets and plan benefit obligations during 2020 and 2019, and a summary of the funded status as of December 31, 2020 and 2019:

	Year Ended December 31,
(in thousands)	2020		2019
Change in Fair Value of Plan Assets
Balance at beginning of year	$	73,357	$	63,109
Actual return on plan assets	899		12,123
Company contribution	4,408		4,793
Benefit payments	(6,724)		(6,668)
Balance at end of year	$	71,940	$	73,357

	Year Ended December 31,
(in thousands)	2020		2019
Change in Benefit Obligations
Balance at beginning of year	$	102,607	$	95,869
Interest cost	3,032		3,801
Service cost	925		900
Assumption change loss	7,902		8,373
Actuarial loss	81		332
Benefit payments	(6,723)		(6,668)
Balance at end of year	$	107,824	$	102,607

	As of December 31,
(in thousands)	2020		2019
Funded status	$	(35,884)	$	(29,250)
Net unfunded amounts recognized in Consolidated Balance Sheets consist of:
Current liabilities	$	(293)	$	(279)
Long-term liabilities	(35,591)		(28,971)
Total net unfunded amount recognized in Consolidated Balance Sheets	$	(35,884)	$	(29,250)

Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive loss consist of net actuarial losses before income taxes of $65.2 million and $56.5 million as of December 31, 2020 and 2019, respectively.

The discount rate used in determining the accumulated post-retirement benefit obligation was 2.2% as of December 31, 2020 and 3.1% as of December 31, 2019. The discount rate used for the accumulated post-retirement obligation was derived using a blend of U.S. Treasury and high-quality corporate bond discount rates.

The expected long-term rate of return on assets assumption was 5.8% for both 2020 and 2019. The expected long-term rate of return on assets assumption was developed considering forward looking capital market assumptions and historical return expectations for each asset class assuming the plans’ target asset allocation and full availability of invested assets.

Closely held fund strategies seek to capitalize on inefficiencies identified across different asset classes or markets and include long-short equity and long equity, event-driven, multi-strategy and distressed credit.

Plan assets were measured at fair value. Registered investment companies are public investment vehicles valued using the Net Asset Value (“NAV”) of shares held by the pension plan at year-end. Equity and fixed income funds are valued based on quoted market prices in active markets. Closely held funds held by the pension plan, which are only available through private offerings, do not have readily determinable fair values. Estimates of fair value of these funds were determined using the information provided by the fund managers and are generally based on the NAV per share or its equivalent.

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table sets forth the pension plan assets at fair value in accordance with the fair value hierarchy described in Note 12:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	1,582	$	—	$	—	$	1,582	$	2,867	$	—	$	—	$	2,867
Fixed income funds	2,000		3,086		—		5,086		—		2,861		—		2,861
Mutual funds	54,671		—		—		54,671		54,085		—		—		54,085
	$	58,253	$	3,086	$	—	$	61,339	$	56,952	$	2,861	$	—	$	59,813
Closely held funds(a)
Equity partnerships							3,700								3,660
Hedge fund investments							6,901								9,884
Total closely held funds(a)							10,601								13,544
Total	$	58,253	$	3,086	$	—	$	71,940	$	56,952	$	2,861	$	—	$	73,357

_____________________________________________________________________________________________________________

(a)Closely held funds in private investment were comprised of a combination of Level 1, 2 and 3 investments, but were not categorized in the fair value hierarchy because they were measured at NAV using the practical expedient under ASC 820, Fair Value Measurement (“ASC 820”).

As of December 31, 2020 and 2019, pension plan assets included approximately $10.6 million and $13.5 million, respectively, of investments in hedge funds and equity partnerships which do not have readily determinable fair values. The underlying holdings of the funds were comprised of a combination of assets for which the estimate of fair value is determined using information provided by fund managers.

The plans have benefit obligations in excess of the fair value of each plan’s assets as follows:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Pension Plan		Benefit Equalization Plan		Total		Pension Plan		Benefit Equalization Plan		Total
Projected benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Accumulated benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Fair value of plans' assets	71,940		—		71,940		73,357		—		73,357
Projected benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250
Accumulated benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250

Section 401(k) Plan

The Company has a contributory Section 401(k) plan which covers its executive, professional, administrative and clerical employees, subject to certain specified service requirements. The cost recognized by the Company for its 401(k) plan was $4.3 million in 2020, $4.1 million in 2019 and $4.2 million in 2018. The Company’s contribution is based on a non-discretionary match of employees’ contributions, as defined by the plan.

Multiemployer Plans

In addition to the Company’s defined benefit pension and contribution plans discussed above, the Company participates in multiemployer pension plans for its union construction employees. Contributions are based on the hours worked by employees covered under various collective bargaining agreements. Under the Employee Retirement Income Security Act, a contributor to a multiemployer plan is only liable for its proportionate share of a plan’s unfunded vested liability upon termination, or withdrawal from a plan. The Company currently has no intention of withdrawing from any of the multiemployer pension plans in which it participates and, therefore, has not recognized a liability for its proportionate share of any unfunded vested liabilities associated with these plans.

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TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table summarizes key information for the plans that the Company made significant contributions to during the three years ended December 31, 2020:

Pension Protections Act Zone Status

FIP/RP Status Pending Or Implemented

Company Contributions (amounts in millions)

Expiration Date of Collective Bargaining Agreement

Pension Fund

EIN/Pension Plan Number

2020

2019

2020(b)

2019(b)

2018

Surcharge Imposed

The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund

13-6123601/001

Green

Green

N/A

$

10.1

$

9.3

(a)

$

12.2

(a)

No

4/13/2022

Excavators Union Local 731 Pension Fund

13-1809825/002

Green

Green

N/A

4.8

5.1

4.1

No

4/30/2022

Carpenters Pension Trust Fund for Northern California

94-6050970

Red

Red

Implemented

4.6

4.0

4.9

No

6/30/2023

Northern California Electrical Workers Pension Plan

94-6062674

Green

Green

N/A

3.5

3.0

4.1

No

5/31/2022

_____________________________________________________________________________________________________________

(a)These amounts exceeded 5% of the respective total plan contributions.

(b)The Company's contributions as a percentage of total plan contributions were not available for the 2020 and 2019 plan years for any of the above pension funds, excluding The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund, Excavators Union Local 731 Pension Fund and Northern California Electrical Workers Pension Plan for the 2019 plan year.

In addition to the individually significant plans described above, the Company also contributed approximately $46.8 million in 2020, $36.5 million in 2019 and $36.6 million in 2018 to other multiemployer pension plans. Funding for these payments is principally provided for in the contracts with our customers.

12.    Fair Value Measurements

The fair value hierarchy established by ASC 820 prioritizes the use of inputs used in valuation techniques into the following three levels:

•Level 1 inputs are observable quoted prices in active markets for identical assets or liabilities

•Level 2 inputs are observable, either directly or indirectly, but are not Level 1 inputs

•Level 3 inputs are unobservable

The following fair value hierarchy table presents the Company’s assets that are measured at fair value on a recurring basis as of December 31, 2020 and 2019:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents(a)	$	374,289	$	—	$	—	$	374,289	$	193,685	$	—	$	—	$	193,685
Restricted cash(a)	77,563		—		—		77,563		8,416		—		—		8,416
Restricted investments(b)	—		78,912		—		78,912		—		70,974		—		70,974
Investments in lieu of retainage(c)	92,609		1,300		—		93,909		89,572		1,219		—		90,791
Total	$	544,461	$	80,212	$	—	$	624,673	$	291,673	$	72,193	$	—	$	363,866

_____________________________________________________________________________________________________________

(a)Includes money market funds and short-term investments with maturity dates of three months or less when acquired.

(b)Restricted investments, as of December 31, 2020, consist of investments in U.S. government agency securities of $40.5 million, corporate debt securities of $37.5 million and corporate certificates of deposits of $0.9 million, all with maturities of up to five years, and are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets and are therefore classified as Level 2 assets. As of December 31, 2019, restricted investments consisted of investments in corporate debt securities of $35.8 million and U.S. government agency securities of $33.8 million and corporate certificates of deposits of $1.4 million, all with maturities of up to five years. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

(c)Investments in lieu of retainage are included in retainage receivable and as of December 31, 2020 are comprised of money market funds of $92.6 million and municipal bonds of $1.3 million. The fair values of the money market funds are measured using quoted market prices; therefore, they are classified as Level 1 assets. The fair values of municipal bonds are measured using readily available pricing sources for comparable instruments; therefore, they are classified as Level 2 assets. As of December 31, 2019, investments in lieu of retainage consisted of money market funds of $89.6 million and

F-41

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

municipal bonds of $1.2 million. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

The carrying values of receivables, payables and other amounts arising out of normal contract activities, including retainage, which may be settled beyond one year, are estimated to approximate fair value. Of the Company’s long-term debt, the fair value of the 2017 Senior Notes was $495.0 million and $485.0 million as of December 31, 2020 and 2019, respectively. The fair value of the Term Loan B was $425.0 million as of December 31, 2020 and was determined using Level 2 inputs, specifically third-party quoted market prices. The fair value of the Convertible Notes was $69.1 million and $193.4 million as of December 31, 2020 and 2019, respectively. The fair values of the 2017 Senior Notes and Convertible Notes were determined using Level 1 inputs, specifically current observable market prices. The fair value of the Convertible Notes repurchased on the extinguishment date was used in determining the loss on extinguishment. The fair value on the extinguishment date approximated the face value of the notes and was determined using Level 2 inputs. The reported value of the Company’s remaining borrowings approximates fair value as of December 31, 2020 and 2019.

During the year ended December 31, 2019, the Company acquired an additional 25% interest in a Civil segment joint venture. The Company’s 50% ownership interest prior to the acquisition was accounted for under the proportionate consolidation method and had a carrying value of $3.2 million. Through this acquisition, the Company’s interest increased from 50% to 75%, and it obtained a controlling financial interest in the joint venture, thereby requiring consolidation by the Company. The transaction was accounted for as a business combination achieved in stages, and under ASC 805, Business Combinations, the previously held equity interest in the joint venture was remeasured at the acquisition date fair value with the resulting gain of $37.8 million recognized in earnings, which was included in general and administrative expenses in the Company’s Consolidated Statement of Operations. The fair value of the joint venture and the Company’s existing investment therein was determined based on the fair value of the underlying assets and liabilities acquired by applying an income approach that used discounted future estimated cash flows based on projected revenues, expenses and weighted-average cost of capital. The fair value of the assets and liabilities of the joint venture was recognized in the Company’s consolidated financial statements as of the acquisition date with the 25% interest not owned by the Company recorded as a noncontrolling interest. The acquisition resulted in the recording of an intangible asset for construction contract backlog of $75.6 million. The fair values of the other assets acquired and liabilities assumed were not material. Pro forma results of operations for this acquisition of additional interest in the joint venture have not been presented because they are not material to the Company’s results of operations.

13.    Variable Interest Entities (VIEs)

The Company may form joint ventures or partnerships with third parties for the execution of projects. In accordance with ASC 810, the Company assesses its partnerships and joint ventures at inception to determine if any meet the qualifications of a VIE. The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity, and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether a joint venture is a VIE.

ASC 810 also requires the Company to determine whether it is the primary beneficiary of the VIE. The Company concludes that it is the primary beneficiary and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the VIE and (b) the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining if the Company is the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

As of December 31, 2020, the Company had unconsolidated VIE-related current assets and liabilities of $0.6 million and $0.5 million, respectively, included in the Company’s Consolidated Balance Sheet. As of December 31, 2019, the Company had unconsolidated VIE-related current assets and liabilities of $1.5 million and $1.4 million, respectively, included in the Company’s Consolidated Balance Sheet. The Company’s maximum exposure to loss as a result of its investments in unconsolidated VIEs is typically limited to the aggregate of the carrying value of the investment and future funding commitments. There were no future funding requirements for the unconsolidated VIEs as of December 31, 2020.

F-42

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

As of December 31, 2020, the Company’s Consolidated Balance Sheet included current and noncurrent assets of $405.7 million and $14.2 million, respectively, as well as current liabilities of $514.9 million related to the operations of its consolidated VIEs. As of December 31, 2019, the Company’s Consolidated Balance Sheet included current and noncurrent assets of $365.0 million and $52.0 million, respectively, as well as current liabilities of $556.1 million related to the operations of its consolidated VIEs.

Below is a discussion of some of the Company’s more significant or unique VIEs.

The Company established a joint venture to construct the Purple Line Extension Section 2 (Tunnels and Stations) and Section 3 (Stations) mass-transit projects in Los Angeles, California with a combined value of approximately $2.8 billion. The Company has a 75% interest in the joint venture with the remaining 25% held by O&G Industries, Inc. (“O&G”). The joint venture was initially financed with contributions from the partners and, per the terms of the joint venture agreement, the partners may be required to provide additional capital contributions in the future. The Company has determined that this joint venture is a VIE for which the Company is the primary beneficiary.

The Company also established a joint venture with Parsons Corporation (“Parsons”) to construct the Newark Liberty International Airport Terminal One project, a $1.4 billion transportation infrastructure project in Newark, New Jersey. The Company has an 80% interest in the joint venture with the remaining 20% held by Parsons. The joint venture was initially financed with contributions from the partners and, per the terms of the joint venture agreement, the partners may be required to provide additional capital contributions in the future. The Company has determined that this joint venture is a VIE for which the Company is the primary beneficiary.

14.    Business Segments

The Company offers general contracting, pre-construction planning and comprehensive project management services, including planning and scheduling of manpower, equipment, materials and subcontractors required for the timely completion of a project in accordance with the terms and specifications contained in a construction contract. The Company also offers self-performed construction services: site work, concrete forming and placement, steel erection, electrical, mechanical, plumbing, and HVAC (heating, ventilation and air conditioning). As described below, the Company’s business is conducted through three segments: Civil, Building and Specialty Contractors. These segments are determined based on how the Company’s Chairman and Chief Executive Officer (chief operating decision maker) aggregates business units when evaluating performance and allocating resources.

The Civil segment specializes in public works construction and the replacement and reconstruction of infrastructure. The contracting services provided by the Civil segment include construction and rehabilitation of highways, bridges, tunnels, mass-transit systems, military defense facilities, and water management and wastewater treatment facilities.

The Building segment has significant experience providing services for private and public works customers in a number of specialized building markets, including: hospitality and gaming, transportation, health care, commercial offices, government facilities, sports and entertainment, education, correctional facilities, biotech, pharmaceutical, industrial and high-tech.

The Specialty Contractors segment specializes in electrical, mechanical, plumbing, HVAC, fire protection systems and pneumatically placed concrete for a full range of civil and building construction projects in the industrial, commercial, hospitality and gaming, and mass-transit end markets. This segment provides the Company with unique strengths and capabilities that allow the Company to position itself as a full-service contractor with greater control over scheduled work, project delivery, and cost and risk management.

To the extent that a contract is co-managed and co-executed among segments, the Company allocates the share of revenues and costs of the contract to each segment to reflect the shared responsibilities in the management and execution of the project.

F-43

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following tables set forth certain reportable segment information relating to the Company’s operations for the years ended December 31, 2020, 2019 and 2018:

	Reportable Segments
(in thousands)	Civil		Building		Specialty Contractors		Total		Corporate			Consolidated Total
Year ended December 31, 2020
Total revenue	$	2,565,210	$	2,114,459	$	1,135,018	$	5,814,687	$	—		$	5,814,687
Elimination of intersegment revenue	(365,311)		(129,818)		(795)		(495,924)		—			(495,924)
Revenue from external customers	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763	$	—		$	5,318,763
Income (loss) from construction operations(a)	$	245,835	$	53,158	$	17,203	$	316,196	$	(53,852)	(b)	$	262,344
Capital expenditures	$	51,044	$	878	$	1,917	$	53,839	$	942		$	54,781
Depreciation and amortization(c)	$	90,250	$	1,703	$	3,983	$	95,936	$	11,098		$	107,034
Year ended December 31, 2019
Total revenue	$	2,054,097	$	1,764,753	$	929,738	$	4,748,588	$	—		$	4,748,588
Elimination of intersegment revenue	(274,745)		(22,713)		(298)		(297,756)		—			(297,756)
Revenue from external customers	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832	$	—		$	4,450,832
Income (loss) from construction operations(d)	$	(150,837)	$	23,655	$	(172,637)	$	(299,819)	$	(65,188)	(b)	$	(365,007)
Capital expenditures	$	82,156	$	518	$	688	$	83,362	$	834		$	84,196
Depreciation and amortization(c)	$	47,905	$	1,934	$	4,136	$	53,975	$	11,069		$	65,044
Year ended December 31, 2018
Total revenue	$	1,810,232	$	1,866,902	$	1,006,870	$	4,684,004	$	—		$	4,684,004
Elimination of intersegment revenue	(224,139)		(5,203)		—		(229,342)		—			(229,342)
Revenue from external customers	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662	$	—		$	4,454,662
Income (loss) from construction operations(e)	$	168,256	$	43,939	$	43,430	$	255,625	$	(63,749)	(b)	$	191,876
Capital expenditures	$	73,866	$	1,655	$	777	$	76,298	$	771		$	77,069
Depreciation and amortization(c)	$	29,685	$	1,956	$	4,358	$	35,999	$	11,268		$	47,267

_____________________________________________________________________________________________________________

(a)During the year ended December 31, 2020, the Company recorded a charge of $15.2 million in income (loss) from construction operations (an after-tax impact of $11.0 million, or $0.22 per diluted share) due to an unfavorable legal ruling pertaining to a mechanical project in California in the Specialty Contractors segment, as well as a charge of $13.2 million (an after-tax impact of $9.6 million, or $0.19 per diluted share) due to an adverse arbitration ruling pertaining to an electrical project in New York in the Specialty Contractors segment. The Company also recorded a gain of $25.7 million in Specialty Contractors segment general and administrative expenses (an after-tax impact of $18.6 million, or $0.36 per diluted share) as a result of a favorable arbitration decision and subsequent settlement of the related employment dispute.

(b)Consists primarily of corporate general and administrative expenses.

(c)Depreciation and amortization is included in income (loss) from construction operations.

(d)During the year ended December 31, 2019, the Company recorded a non-cash goodwill impairment charge of $379.9 million in income (loss) from construction operations (an after-tax impact of $330.5 million, or $6.58 per diluted share) resulting from an interim impairment test the Company performed as of June 1, 2019. For further information and breakdown of the goodwill impairment charge by segment, see Note 6. In addition, during the year ended December 31, 2019 the Company recorded a charge of $166.8 million in income (loss) from construction operations (an after-tax impact of $119.4 million, or $2.38 per diluted share), which principally impacted the Civil segment, as a result of the adverse jury verdict on the Alaskan Way Viaduct (SR 99) Matter, as discussed in Note 8. Lastly, the Company recognized a one-time gain of $37.8 million (an after-tax impact of $27.1 million, or $0.54 per diluted share) in Civil segment general and administrative expenses related to a remeasurement of its investment in a joint venture (see Note 12).

(e)During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in income (loss) from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.

The above were the only changes in estimates considered material to the Company’s results of operations during the periods presented herein.

F-44

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Total assets by segment were as follows:

	As of December 31,
(in thousands)	2020		2019
Civil	$	3,141,991	$	2,791,402
Building	1,147,649		995,298
Specialty Contractors	673,891		635,180
Corporate and other(a)	82,086		63,897
Total assets	$	5,045,617	$	4,485,777

_____________________________________________________________________________________________________________

(a)    Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

Geographic Information

Information concerning principal geographic areas is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Revenue:
United States	$	4,953,045	$	4,073,691	$	4,180,206
Foreign and U.S. territories	365,718		377,141		274,456
Total revenue	$	5,318,763	$	4,450,832	$	4,454,662

	As of December 31,
(in thousands)	2020		2019
Assets:
United States	$	4,836,735	$	4,271,722
Foreign and U.S. territories	208,882		214,055
Total assets	$	5,045,617	$	4,485,777

Reconciliation of Segment Information to Consolidated Amounts

A reconciliation of segment results to the consolidated income (loss) before income taxes is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Income (loss) from construction operations	$	262,344	$	(365,007)	$	191,876
Other income (expense)	(11,853)		6,667		4,256
Interest expense	(76,212)		(67,494)		(63,519)
Income (loss) before income taxes	$	174,279	$	(425,834)	$	132,613

15.    Related Party Transactions

The Company leases, at market rates, certain facilities from an entity owned by Ronald N. Tutor, the Company’s Chairman and Chief Executive Officer. Under these leases, the Company paid $3.2 million in 2020, $3.1 million in 2019 and $3.0 million in 2018, and recognized expense of $3.2 million in each of the three years.

Raymond R. Oneglia, Vice Chairman of O&G, is a director of the Company. The Company occasionally forms construction project joint ventures with O&G. During the three years ended December 31, 2020, the Company had active joint ventures with O&G including two infrastructure projects in the northeastern United States that were completed in 2017 and two mass-transit projects in Los Angeles, California to construct the Purple Line Extension Section 2 (Tunnels and Stations) and Section 3 (Stations), in which the Company’s and O&G’s joint venture interests are 75% and 25%, respectively. O&G may provide equipment and services to these joint ventures on customary trade terms; there were no material payments made by these joint ventures to O&G for services and equipment during the years ended December 31, 2020, 2019 and 2018.

F-45

TUTOR PERINI CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Peter Arkley, Senior Managing Director, Construction Services Group, of Alliant Insurance Services, Inc. (“Alliant”), is a director of the Company. The Company uses Alliant for various insurance-related services. The associated expenses for services provided for the years ended December 31, 2020, 2019 and 2018 were $16.0 million, $18.4 million and $14.7 million, respectively. The Company owed Alliant $2.7 million as of both December 31, 2020 and 2019 for services rendered.

16.    Unaudited Quarterly Financial Data

The following table presents selected unaudited quarterly financial data for each full quarterly period of 2020 and 2019:

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2020
Revenue	$	1,250,729	$	1,276,427	$	1,442,091	$	1,349,516
Gross profit	111,080		117,754		124,915		132,404
Income from construction operations	47,227		57,696		83,021		74,400
Income before income taxes	31,272		40,435		49,360		53,212
Net income	26,138		30,859		49,323		46,017
Net income attributable to Tutor Perini Corporation	17,371		18,709		36,819		35,495
Earnings per common share:
Basic	$	0.35	$	0.37	$	0.72	$	0.70
Diluted	$	0.34	$	0.37	$	0.72	$	0.69

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2019
Revenue	$	958,487	$	1,125,275	$	1,189,345	$	1,177,725
Gross profit (loss)	88,470		100,943		115,063		(62,704)
Income (loss) from construction operations	22,913		(341,717)		47,943		(94,146)
Income (loss) before income taxes	6,910		(358,339)		32,312		(106,717)
Net income (loss)	4,722		(315,439)		26,721		(76,229)
Net income (loss) attributable to Tutor Perini Corporation	(356)		(320,530)		19,313		(86,117)
Earnings (loss) per common share:
Basic	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)
Diluted	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)

F-46

EX-4.7

Exhibit 4.7

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

The following description of the common stock of Tutor Perini Corporation (“we,” “us” and “our”) is not complete and is qualified in its entirety by reference to our Amended and Restated Articles of Organization (“Articles of Organization”) and our Third Amended and Restated By-Laws (“By-Laws”) each of which is incorporated by reference as an exhibit to this Annual Report on Form 10-K. The terms of our common stock are also subject to and qualified by certain provisions of the Massachusetts General Laws.

Authorized Capital Stock

Our authorized capital stock consists of 112,500,000 shares of common stock, $1.00 par value per share, and 1,000,000 shares of preferred stock, $1.00 par value per share.

Common Stock

Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of our shareholders and do not have cumulative voting rights.

If a quorum of a voting group exists at a meeting of shareholders, favorable action on a matter, other than the election of a member of our board of directors, is taken by a voting group if the votes cast within the group favoring the action exceed the votes cast opposing the action, unless a greater number of affirmative votes is required by law, our Articles of Organization, our By-Laws or, to the extent authorized by law, a resolution of our board of directors. If a quorum of a voting group exists at a meeting of shareholders, directors shall be elected by a plurality of the votes cast by the shares entitled to vote in the election.

Holders of our common stock are entitled to receive any dividends as may be declared by our board of directors out of funds legally available therefor, subject to any preferential dividend rights of outstanding preferred stock.

In the event of our liquidation, dissolution or winding up, the holders of our common stock are entitled to receive ratably our assets remaining available after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock. Holders of our common stock have no preemptive, subscription, redemption or conversion rights. The rights, preferences and privileges of holders of our common stock are subject to and may be adversely affected by the rights of the holders of shares of any series of preferred stock that our board of directors may establish, designate and issue in the future.

Certain Effects of Authorized but Unissued Stock

We have shares of common stock and preferred stock available for future issuance without shareholder approval. We may utilize these additional shares for a variety of corporate purposes, including future public offerings to raise additional capital or facilitate corporate acquisitions or for payment as a dividend on the capital stock. The existence of unissued and unreserved common stock and preferred stock may enable our board of directors to issue shares to persons friendly to current management or to issue preferred stock with terms that could render more difficult or discourage a third-party attempt to obtain control of us by means of a merger, tender offer, proxy contest or otherwise, thereby protecting the continuity of our management. In addition, if we issue preferred stock, the issuance could adversely affect the voting power of holders of our common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation.

Amended Shareholders Agreement

Effective September 8, 2008 upon completion of the merger with Tutor-Saliba Corporation (“Tutor-Saliba”), we entered into a shareholders agreement (as subsequently amended, the “Amended Shareholders Agreement”) pursuant to which Ronald N. Tutor (as the representative of the former Tutor-Saliba shareholders) has the right to designate two nominees for election to the board of directors if Mr. Tutor and the three trusts he controls (the “Tutor

Group”) own at least 22.5% of the outstanding shares of our common stock and one nominee if the Tutor Group owns less than 22.5% but at least 11.25% of the outstanding shares of our common stock.

Provisions of Our Articles of Organization, Our By-Lawsand the Massachusetts General Laws That May Have Anti-Takeover Effects

Removal of Directors by Shareholders. Our By-Laws provide that members of our board of directors may be removed (a) with or without cause by vote of the holders of a majority of the voting power of the then outstanding shares of our capital stock entitled to vote generally in the election of directors, voting together as a single class or (b) for cause by a vote of a majority of our directors then in office.

Advance Notice Requirements for Shareholder Proposals and Director Nominations. Our By-Laws provide that nominations for election to our board of directors may be made either by our board of directors or by one of our shareholders who complies with specified notice provisions. Our By-Laws contain similar advance notice provisions for shareholder proposals for action at shareholder meetings.

Special Meeting of Shareholders. Our By-Laws impose restrictions and limitations on the ability of shareholders to call special meetings of shareholders. Requests for shareholder meetings must be made by shareholders holding at least 25% in interest of the capital stock entitled to vote at such meeting.

Action by Consent of Shareholders. Our By-Laws provide that any action to be taken by shareholders may be taken without a meeting if all shareholders entitled to vote on the matter consent to the action in writing.

Business Combinations with Interested Shareholders. The Massachusetts General Laws contain anti-takeover provisions regarding, among other things, business combinations with an affiliated shareholder. In general, the Massachusetts General Laws prevent a publicly held Massachusetts corporation from engaging in a business combination, as defined in the Massachusetts General Laws, with an interested shareholder for a period of three years after the date of the transaction in which the person became an interested shareholder, unless:

•before the date on which the person became an interested shareholder, the board of directors of the corporation approved either the business combination or the transaction in which the person became an interested shareholder;

•the interested shareholder acquired at least 90% of the outstanding voting stock of the corporation at the time it became an interested shareholder; or

•the business combination is approved by the board of directors and the holders of at least two-thirds of the outstanding voting stock of the corporation voting at a meeting, excluding the voting stock owned by the interested shareholder.

An interested shareholder is generally a person owning 5% or more of the outstanding voting stock of the corporation. A business combination includes mergers, consolidations, stock and asset sales and other transactions with the interested shareholder that result in a financial benefit to the interested shareholder.

Control Share Acquisitions. We have elected to opt out of the control share acquisitions provisions of the Massachusetts General Laws. We could, however, opt into the control share acquisitions provisions at any time by amending our By-Laws.

In general, the control share acquisitions provisions of the Massachusetts General Laws provide that any person, including his, her or its affiliates, who acquires shares of a corporation that are subject to the control share acquisitions statute and whose shares represent one-fifth or more of the voting power of the corporation in the election of directors cannot exercise any voting power with respect to those shares, or any shares acquired by the person within 90 days before or after an acquisition of this nature, unless these voting rights are authorized by the shareholders of the corporation.

The authorization of voting rights requires the affirmative vote of the holders of a majority of the outstanding voting shares, excluding shares owned by:

•the person making an acquisition of this nature;

•any officer of the corporation; and

•any employee who is also a director of the corporation.

There are several other types of share acquisitions that are not subject to these provisions of the Massachusetts General Laws, including acquisitions of shares under a tender offer, merger or consolidation that is made in connection with an agreement to which the corporation is a party and acquisitions of shares directly from the corporation or a wholly owned subsidiary of the corporation.

EX-10.14

Exhibit 10.14

SECOND AMENDMENT TO 15901 OLDEN STREET, SYLMAR

AND 11171 CHERRY AVENUE, FONTANA PROPERTIES LEASE

This SECOND AMENDMENT TO 15901 OLDEN STREET, SYLMAR AND 11171 CHERRY AVENUE, FONTANA PROPERTIES LEASE (“Second Amendment”) is made and entered into and effective as of the 28th day of December 2020 (the “Second Amendment Effective Date”) by and between ALIARON INVESTMENTS, LTD., LIMITED PARTNERSHIP, a California limited partnership (formerly known as Kristra Investments, Ltd., Limited Partnership) (“Lessor”), and TUTOR PERINI CORPORATION, a Massachusetts corporation (“Lessee”). (Each individual party may be referred to herein as a “Party” and collectively hereinafter in this Second Amendment, the “Parties”).

WITNESSETH:

WHEREAS, Lessor and Lessee are parties to that certain 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective June 1, 2014, as amended by that certain First Amendment to 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective as of October 7, 2020 (collectively, the “Original Lease”), for the lease of land and improvements commonly known and numbered as (i) Assessor’s Parcel Number 2604-002-019, located at 15901 Olden Street, Sylmar, California 91342 (“Property A”), and (i) Assessor’s Parcel Number 0236-191-14-0-000, located at 11171 Cherry Avenue, Fontana, California 92337 (“Property B”);

WHEREAS, Lessor (“Fontana Lease Landlord”) and Lessee (“Fontana Lease Tenant”) (in their capacities as landlord and tenant, respectively, under the Fontana Lease [defined below]), are also parties to that certain Commercial Lease Agreement, dated and effective June 1, 2014, as amended by that certain First Amendment to Commercial Lease Agreement, dated and effective as of October 7, 2020 (collectively, the “Fontana Lease”), for the lease of land and improvements commonly known and numbered as Assessor’s Parcel Number 0236-191-25-0-000, and located on the northeast corner of Jurupa Avenue and Cherry Avenue in Fontana, California; and

WHEREAS, the Parties desire by this instrument to amend the Original Lease in accordance with those certain modifications as more particularly set forth herein.

NOW, THEREFORE, the Parties in consideration of the mutual promises and agreements set forth herein, and intending to be legally bound, on behalf of themselves and their respective successors and assigns, do hereby agree as follows:

1.Recitals and Definitions.

a.Recitals. Lessor and Lessee incorporate the above recitals into this Second Amendment and affirm such recitals are true and correct.

b.Definitions. Each capitalized term used in this Second Amendment shall have the same meaning as is ascribed to such capitalized term in the Original Lease unless expressly otherwise provided for herein. As of the Second Amendment Effective Date and for the purposes of this Second Amendment, the Original Lease, as amended hereby, shall be referred to

1

as the “Lease”, and from and after the date of this Second Amendment, the Original Lease shall be referred to as the “Headquarters Lease”.

2.Amendments: The Original Lease shall be amended as follows:

a.Premises. The Original Lease shall be amended so that (i) any reference to “Property A” or “Property B” therein shall be replaced with a reference to “Premises”, and (ii) the definition of “Premises” is deleted in its entirety and the following is substituted in place thereof:

“Landlord is the owner of the land and improvements commonly known and numbered as Assessor’s Parcel Number 2604-002-019, located at 15901 Olden Street, Sylmar, California 91342. The Parties acknowledge and agree that simultaneously with the execution of this Second Amendment, Fontana Lease Landlord and Fontana Lease Tenant are entering into a second amendment to the Fontana Lease to, among other things, amend the Fontana Lease to include Property B in the Leased Premises (as defined in the Fontana Lease).”

b.Term. Paragraph 2 of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“2.    Term. The term of this Lease shall commence on June 1, 2014 and end on July 31, 2038, unless sooner terminated pursuant to any provision hereof.”

c.Base Rent. The first sentence of Paragraph 3 of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“3. Rent. Lessor and Lessee hereby acknowledge and agree that Lessee has paid all Base Rent and additional rent that Lessee is obligated to pay under the Lease for the period commencing on June 1, 2014 and continuing through and until December 31, 2020. For the period commencing on January 1, 2021 and continuing through and until December 31, 2021, Lessee shall pay to Lessor the monthly lease rate of One Hundred Twenty-One Thousand Dollars ($121,000) for the Premises (“Base Rent”). On January 1, 2022, and on January 1 of each year thereafter, Base Rent shall increase at the rate of the greater of three percent (3%) or the Consumer Price Index (“CPI”) for the Los Angeles metropolitan area.”

d.Defaults; Remedies. Section 13 of the Original Lease shall be amended as follows:

i.In clause (ii) of Section 13(a), the word “three” in the first sentence shall be replaced with the word “five”; and

ii.The following shall be added as a new clause (vi) in Paragraph 13(a):

“(vi)    the failure by Fontana Lease Tenant to make any payment of rent when due to Fontana Lease Landlord under the Fontana Lease, if such failure shall continue for fifteen (15) days after notice thereof shall have been given to Fontana Lease Tenant by Fontana Lease Landlord;

2

provided, however, that the foregoing shall only constitute a default in the event that, at the time of such default, the Fontana Lease Landlord is Aliaron Investments, Ltd. or an affiliate thereof.”

e.Landlord’s Option to Require Tenant to Purchase Premises. Paragraphs 39(a) and 39(b) of the Original Lease are deleted in their entirety and any references thereto shall be null and void.

f.Tenant’s Option to Require Landlord to Sell Premises. Paragraphs 39(c) and Paragraph 39(d) of the Original Lease are deleted in their entirety and any references thereto shall be null and void.

g.Right of First Refusal. The Original Lease shall be amended to add the following as a new Paragraph 30(e):

“(e) Right of First Refusal.

1.During the Term, before Lessor may convey, assign, or otherwise transfer its ownership interest in all or any portion of the Premises to a third party, Lessee shall have a right of first refusal to purchase the Premises on the material terms and conditions that Lessor is willing to sell the Premises to a third party following the procedures set forth in this Paragraph 30(e).

2.Prior to entering into a binding agreement to sell the Premises to a third party, Lessor shall deliver to Lessee written notice (the “Right of First Refusal Offer Notice”) of the material terms and conditions that Lessor has negotiated in good faith, and is willing to accept, from a third party, including the purchase price at which Lessor is willing to sell the Premises (such price, the “Right of First Refusal Purchase Price”). Upon Lessee’s receipt of a Right of First Refusal Offer Notice, Lessee shall have fifteen (15) calendar days to deliver written notice (a “Right of First Refusal Acceptance Notice”) to Lessor that it will purchase the Premises for the Right of First Refusal Purchase Price and on the terms and conditions set forth in the Right of First Refusal Offer Notice.

3.If Lessee timely delivers a Right of First Refusal Acceptance Notice electing to purchase the Premises on the terms and conditions set forth in the Right of First Refusal Offer Notice, then Lessor shall be bound to convey, assign, or otherwise transfer the Premises to Lessee promptly thereafter at the Right of First Refusal Purchase Price and on the terms and conditions set forth in the Right of First Refusal Offer Notice, and the parties shall proceed to consummate the sale of the Premises.

4.If Lessee (i) fails to timely deliver a Right of First Refusal Acceptance Notice, or (ii) elects not to purchase the Premises on the terms and conditions set forth in the Right of First Refusal Offer Notice, then Lessor shall be free for a period of one

3

hundred fifty (150) calendar days (such 150-calendar day period, “Lessor’s Sale Period”) to convey, assign, or otherwise transfer the Premises to a third party at a price not less than the Right of First Refusal Purchase Price and not on more favorable material terms and conditions than those stated in the Right of First Refusal Offer Notice. Any conveyance, assignment, or transfer of the Premises by Lessor to a third party shall be fully subject to the terms of this Lease and Lessor agrees to take all necessary steps to ensure the terms of this Lease shall be binding upon any new third party owner of the Premises.

5.If Lessor shall not have so conveyed, assigned, or transferred the Premises to a third party within Lessor’s Sale Period, then Lessor may not sell the Premises (or any portion thereof) to a third party without providing a new Right of First Refusal Offer Notice to Lessee and complying with the foregoing provisions of this Paragraph 30(e).

6.Lessee’s rights under this Paragraph 30(e) shall be at all times subordinate in all respects to all rights and remedies of JPMorgan Chase Bank, N.A. (the “Bank”) under the Bank’s deed of trust encumbering the Premises, such that Lessee’s rights under this Paragraph 30(e) shall not survive any foreclosure on the Premises by the Bank pursuant to its deed of trust, and shall not apply to any sale of the Premises by a receiver appointed by the Bank pursuant to its deed of trust.”

3.Lessor’s Access. Paragraph 32 of the Original Lease shall be amended to add the following as a new sentence thereto:

“In addition, Lessor and Lessor's agents shall have the right, at reasonable times, to enter the Premises for a period of up to fifteen (15) days, to remove Lessor’s papers and personal effects from the Premises, in each case, provided Lessor shall not thereby unreasonably interfere with Lessee’s business on the Premises.”

4.Miscellaneous.

a.Full Force and Effect. Except as expressly amended hereby, all of the representations, warranties, terms, covenants, conditions and other provisions of the Original Lease shall remain unchanged and shall continue to be, and shall remain, in full force and effect in accordance with their respective terms. The amendments set forth herein shall be limited precisely as provided for herein to the provisions expressly amended herein and shall not be deemed to be an amendment to, waiver of, consent to or modification of any other term or provision of the Original Lease.

b.Conflict. In the event of any conflict between the terms of this Second Amendment and the Original Lease, the terms of this Second Amendment shall

4

control and govern and the provisions of the Original Lease are to be construed in light of the intent of this Second Amendment.

c.Entire Agreement. This Second Amendment sets forth the entire agreement between the Parties regarding the matters set forth herein, superseding all prior agreements and understandings, written and oral, and may not be changed, modified or cancelled orally.

d.Governing Law. This Second Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to any conflicts of law provisions thereof.

e.Further Action. Each Party to this Second Amendment shall execute all instruments and documents and take such further action as may be reasonably required to effectuate the purpose of this Second Amendment.

f.Modification; Amendment: This Second Amendment may be modified or amended only by a writing executed by the Parties hereto.

g.Counterparts. This Second Amendment may be executed in multiple counterparts (including electronic [PDF] or facsimile counterparts), each of which shall be deemed an original, and all such counterparts shall together constitute one and the same instrument.

h.Severability. The invalidity of any portion of this Second Amendment shall not have any effect on the balance thereof.

i.No Broker. Each of Lessee and Lessor represents to the other that it has not dealt with any brokers in connection with this Second Amendment and that no broker negotiated this Second Amendment or is entitled to any commission in connection herewith. Each Party agrees to indemnify, defend and hold the other harmless from and against all claims, demands, actions, liabilities, damages, costs and expenses (including, reasonable attorneys’ fees) arising from any claim for a fee or commission made by any broker claiming to have acted by or on behalf of the indemnifying Party in connection with this Second Amendment. The foregoing indemnity shall survive the expiration or termination of the Lease.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Parties have caused this Second Amendment to be executed by their duly authorized officers or agents on the Second Amendment Effective Date.

ATTEST

LESSOR:	ALIARON INVESTMENTS, LTD. By: Aliaron Investments, Inc. Its: General Partner /s/ Ronald N. Tutor
	Ronald N. Tutor, President Aliaron Investments, Inc.
LESSEE:	TUTOR PERINI CORPORATION /s/ Gary G. Smalley
	Gary G. Smalley, Executive Vice President and Chief Financial Officer

6

EX-10.15

Exhibit 10.15

SECOND AMENDMENT TO FONTANA PROPERTY LEASE

This SECOND AMENDMENT TO FONTANA PROPERTY LEASE (the “Second Amendment”) is made and entered into and effective as of the 28th day of December 2020 (the “Second Amendment Effective Date”) by and between ALIARON INVESTMENTS, LTD., LIMITED PARTNERSHIP, a California limited partnership (formerly known as Kristra Investments, Ltd., Limited Partnership) (“Landlord”), and TUTOR PERINI CORPORATION, a Massachusetts corporation (“Tenant”). (Each individual party may be referred to herein as a “Party” and collectively hereinafter in this Second Amendment as the “Parties”).

WITNESSETH:

WHEREAS, Landlord and Tenant are parties to that certain Fontana Property Lease, dated and effective June 1, 2014, as amended by that certain First Amendment to Commercial Lease Agreement, dated and effective as of October 7, 2020 (collectively, the “Original Lease”), for the lease of the Existing Premises (as defined in Paragraph 2(a) below);

WHEREAS, Landlord (“HQ Lease Lessor”)and Tenant (“HQ Lease Lessee”) (in their capacities as lessor and lessee, respectively, under the HQ Lease [defined below]), are also parties to that certain 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective June 1, 2014, as amended by that certain First Amendment to 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective as of October 7, 2020 (collectively, the “HQ Lease”), for the lease of land and improvements located at (i) 15901 Olden Street, Sylmar, California 91342 (the “Olden Street Premises”), and (ii) the Cherry Avenue Premises (as defined in Paragraph 2(a) below); and

WHEREAS, the Parties desire by this instrument to amend the Original Lease in accordance with those certain modifications as more particularly set forth herein.

NOW, THEREFORE, the Parties, in consideration of the mutual promises and agreements set forth herein, and intending to be legally bound, on behalf of themselves and their respective successors and assigns, do hereby agree as follows:

1.Recitals and Definitions.

a.Recitals. Landlord and Tenant incorporate the above recitals into this Second Amendment and affirm such recitals are true and correct.

b.Definitions. Each capitalized term used in this Second Amendment shall have the same meaning as is ascribed to such capitalized term in the Original Lease unless expressly otherwise provided for herein. As of the Second Amendment Effective Date and for the purposes of this Second Amendment, the Original Lease, as amended hereby, shall be referred to as the “Lease”.

2.Amendments. The Original Lease shall be amended as follows:

a.Premises. The Original Lease shall be amended so that the definition of “Premises” is deleted in its entirety and the following is substituted in place thereof:

1

“Landlord is the owner of the land and improvements commonly known and numbered as (i)Assessor’s Parcel Number 0236-191-25-0-000, located on the northeast corner of Jurupa Avenue and Cherry Avenue in Fontana, California 92337 (the “Existing Premises”), and (ii) Assessor’s Parcel Number 0236-191-14-0-000, located at 11171 Cherry Avenue, Fontana, California 92337 (the “Cherry Avenue Premises”, and collectively with the Existing Premises, the “Leased Premises” or “Premises”). The Parties acknowledge and agree that simultaneously with the execution of this Second Amendment, HQ Lease Lessor and HQ Lease Lessee are entering into a second amendment to the HQ Lease to, among other things, amend the HQ Lease to exclude the Cherry Avenue Premises from the Premises (as defined in the HQ Lease).”

b.Term. Paragraph 2(A) of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“A.    Landlord hereby leases the Leased Premises to Tenant, and Tenant hereby leases the same from Landlord, for an “Initial Term” beginning on June 1, 2014 and ending July 31, 2038.”

c.Base Rent. The first sentence of Paragraph 3(A) of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“A. Base Rent. Landlord and Tenant hereby acknowledge and agree that Tenant has paid all Base Rent and additional rent that Tenant is obligated to pay under the Lease and the HQ Lease for the period commencing on June 1, 2014 and continuing through and until December 31, 2020. For the period commencing on January 1, 2021, and continuing through and until December 31, 2021, Tenant shall pay to Landlord the monthly lease rate of One Hundred Seventy-Nine Thousand Dollars ($179,000) for the Leased Premises (“Base Rent”). On January 1, 2022, and on January 1 of each year thereafter, Base Rent shall increase at the rate of the greater of three percent (3%) or the Consumer Price Index (“CPI”) for the Los Angeles metropolitan area.

d.Landlord’s Option to Require Tenant to Purchase the Leased Premises. Paragraph 4 of the Original Lease is deleted in its entirety and any references thereto shall be null and void.

e.Tenant’s Option to Require Landlord to Sell the Leased Premises. Paragraph 5 of the Original Lease is deleted in its entirety and any references thereto shall be null and void.

f.Use: The second sentence of Paragraph 6 of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“Notwithstanding the foregoing, Tenant shall not use the Leased Premises for the purposes of storing, manufacturing or selling any explosives, flammables or other inherently dangerous substance, chemical, thing or device; provided, however, that the foregoing shall not prevent, prohibit, limit or restrict Tenant (or its agents, contractors

2

or employees) in any way from storing, maintaining, servicing, accessing or using at the Leased Premises (i) fuel tanks for the purpose of fueling equipment or (ii) oxygen and/or acetylene tanks for the purpose of cutting steel, all in accordance with all applicable laws.”

g.Default. The first sentence of Paragraph 15 of the Original Lease is deleted in its entirety and the following is substituted in place thereof:

“If (i) default shall at any time be made (x) by Tenant in the payment of rent when due to Landlord as herein provided, or (y) by HQ Lease Lessee in the payment of rent when due to HQ Lease Lessor as provided in the HQ Lease (provided, however, that the foregoing clause (y) shall only constitute a default in the event that, at the time of such default, the HQ Lease Lessor is Aliaron Investments, Ltd. or an affiliate thereof), and if said default described in the immediately preceding clauses (x) or (y) shall continue for fifteen (15) days after written notice thereof shall have been given to Tenant by Landlord or to HQ Lease Lessee by HQ Lease Lessor, as applicable, or (ii) if default shall be made in any of the other covenants or conditions to be kept, observed and performed by Tenant, and such default shall continue for thirty (30) days after notice thereof in writing to Tenant by Landlord without correction thereof then having been commenced and thereafter diligently prosecuted, Landlord may declare the term of this Lease ended and terminated by giving Tenant written notice of such intention, and if possession of the Leased Premises is not surrendered, Landlord may reenter said premises.”

h.Right of First Refusal. The Original Lease shall be amended to add the following as a new Paragraph 30:

“30.    Right of First Refusal.

A.During the Term, before Landlord may convey, assign, or otherwise transfer its ownership interest in all or any portion of the Leased Premises to a third party, Tenant shall have a right of first refusal to purchase the Leased Premises on the material terms and conditions that Landlord is willing to sell the Leased Premises to a third party following the procedures set forth in this Paragraph 30.

B.Prior to entering into a binding agreement to sell the Leased Premises to a third party, Landlord shall deliver to Tenant written notice (the “Right of First Refusal Offer Notice”) of the material terms and conditions that Landlord has negotiated in good faith, and is willing to accept, from a third party, including the purchase price at which Landlord is willing to sell the Leased Premises (such price, the “Right of First Refusal Purchase Price”). Upon Tenant’s receipt of a Right of First Refusal Offer Notice, Tenant shall have fifteen (15) calendar days to deliver written notice (a “Right of First Refusal Acceptance Notice”) to Landlord that it will purchase the Leased Premises for the Right

3

of First Refusal Purchase Price and on the terms and conditions set forth in the Right of First Refusal Offer Notice.

C.If Tenant timely delivers a Right of First Refusal Acceptance Notice electing to purchase the Leased Premises on the terms and conditions set forth in the Right of First Refusal Offer Notice, then Landlord shall be bound to convey, assign, or otherwise transfer the Leased Premises to Tenant promptly thereafter at the Right of First Refusal Purchase Price and on the terms and conditions set forth in the Right of First Refusal Offer Notice, and the parties shall proceed to consummate the sale of the Leased Premises.

D.If Tenant (i) fails to timely deliver a Right of First Refusal Acceptance Notice, or (ii) elects not to purchase the Leased Premises on the terms and conditions set forth in the Right of First Refusal Offer Notice, then Landlord shall be free, for a period of one hundred fifty (150) calendar days (such 150-calendar day period, “Landlord’s Sale Period”), to convey, assign, or otherwise transfer the Leased Premises to a third party at a price not less than the Right of First Refusal Purchase Price and not on more favorable material terms and conditions than those stated in the Right of First Refusal Offer Notice. Any conveyance, assignment, or transfer of the Leased Premises by Landlord to a third party shall be fully subject to the terms of this Lease and Landlord agrees to take all necessary steps to ensure the terms of this Lease shall be binding upon any new third party owner of the Leased Premises.

E.If Landlord shall not have so conveyed, assigned, or transferred the Leased Premises to a third party within Landlord’s Sale Period, then Landlord may not sell the Leased Premises (or any portion thereof) to a third party without providing a new Right of First Refusal Offer Notice to Tenant and complying with the foregoing provisions of this Paragraph 30.

F.Tenant’s rights under this Paragraph 30 shall be at all times subordinate in all respects to all rights and remedies of JPMorgan Chase Bank, N.A. (the “Bank”) under the Bank’s deed of trust encumbering the Leased Premises, such that Tenant’s rights under this Paragraph 30 shall not survive any foreclosure on the Premises by the Bank pursuant to its deed of trust, and shall not apply to any sale of the Leased Premises by a receiver appointed by the Bank pursuant to its deed of trust.”

3.Miscellaneous.

a.Full Force and Effect. Except as expressly amended hereby, all of the representations, warranties, terms, covenants, conditions and other provisions of the Original Lease shall remain unchanged and shall continue to be, and shall

4

remain, in full force and effect in accordance with their respective terms. The amendments set forth herein shall be limited precisely as provided for herein to the provisions expressly amended herein and shall not be deemed to be an amendment to, waiver of, consent to or modification of any other term or provision of the Original Lease.

b.Conflict. In the event of any conflict between the terms of this Second Amendment and the Original Lease, the terms of this Second Amendment shall control and govern and the provisions of the Original Lease are to be construed in light of the intent of this Second Amendment.

c.Entire Agreement. This Second Amendment sets forth the entire agreement between the Parties regarding the matters set forth herein, superseding all prior agreements and understandings, written and oral, and may not be changed, modified or cancelled orally.

d.Governing Law. This Second Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to any conflicts of law provisions thereof.

e.Further Action. Each Party to this Second Amendment shall execute all instruments and documents and take such further action as may be reasonably required to effectuate the purpose of this Second Amendment.

f.Modification; Amendment. This Second Amendment may be modified or amended only by a writing executed by the Parties hereto.

g.Counterparts. This Second Amendment may be executed in multiple counterparts (including electronic [PDF] or facsimile counterparts), each of which shall be deemed an original, and all such counterparts shall together constitute one and the same instrument.

h.Severability. The invalidity of any portion of this Second Amendment shall not have any effect on the balance thereof.

i.No Broker. Each of Tenant and Landlord represents to the other that it has not dealt with any brokers in connection with this Second Amendment and that no broker negotiated this Second Amendment or is entitled to any commission in connection herewith. Each Party agrees to indemnify, defend and hold the other harmless from and against all claims, demands, actions, liabilities, damages, costs and expenses (including, reasonable attorneys’ fees) arising from any claim for a fee or commission made by any broker claiming to have acted by or on behalf of the indemnifying Party in connection with this Second Amendment. The foregoing indemnity shall survive the expiration or termination of the Lease.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Parties have caused this Second Amendment to be executed by their duly authorized officers or agents on the Second Amendment Effective Date.

ATTEST

LANDLORD:	ALIARON INVESTMENTS, LTD. By: Aliaron Investments, Inc. Its: General Partner /s/ Ronald N. Tutor
	Ronald N. Tutor, President Aliaron Investments, Inc.
TENANT:	TUTOR PERINI CORPORATION /s/ Gary G. Smalley
	Gary G. Smalley, Executive Vice President and Chief Financial Officer

6

EX-10.16

Exhibit 10.16

THIRD AMENDMENT TO HEADQUARTERS LEASE

(F/K/A 15901 OLDEN STREET, SYLMAR

AND 11171 CHERRY AVENUE, FONTANA PROPERTIES LEASE)

This THIRD AMENDMENT TO HEADQUARTERS LEASE (F/K/A 15901 OLDEN STREET, SYLMAR AND 11171 CHERRY AVENUE, FONTANA PROPERTIES LEASE) (“Third Amendment”) is made and entered into and effective as of the 19th day of February 2021 (the “Third Amendment Effective Date”) by and between ALIARON INVESTMENTS, LTD., LIMITED PARTNERSHIP, a California limited partnership (formerly known as Kristra Investments, Ltd., Limited Partnership) (“Lessor”), and TUTOR PERINI CORPORATION, a Massachusetts corporation (“Lessee”). (Each individual party may be referred to herein as a “Party” and collectively hereinafter in this Third Amendment, the “Parties”).

WITNESSETH:

WHEREAS, Lessor and Lessee are parties to that certain 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective June 1, 2014, as amended by that certain First Amendment to 15901 Olden Street, Sylmar and 11171 Cherry Avenue, Fontana Properties Lease, dated and effective as of October 7, 2020, and as amended by that Second Amendment to 15901 Olden Street, Sylmar And 11171 Cherry Avenue Fontana Properties Lease, dated and effective as of December 28, 2020 (collectively, the “Original Lease”), for the lease of the Premises (as defined in the Original Lease); and

WHEREAS, the Parties desire by this instrument to further amend the Original Lease in accordance with those certain modifications as more particularly set forth herein.

NOW, THEREFORE, the Parties in consideration of the mutual promises and agreements set forth herein, and intending to be legally bound, on behalf of themselves and their respective successors and assigns, do hereby agree as follows:

1.Recitals and Definitions.

a.Recitals. Lessor and Lessee incorporate the above recitals into this Third Amendment and affirm such recitals are true and correct.

b.Definitions. Each capitalized term used in this Third Amendment shall have the same meaning as is ascribed to such capitalized term in the Original Lease unless expressly otherwise provided for herein. As of the Third Amendment Effective Date and for the purposes of this Third Amendment, the Original Lease, as amended hereby, shall be referred to as the “Lease”, and from and after the date of this Third Amendment, the Original Lease shall continue to be referred to as the “Headquarters Lease”.

2.Amendments: The Original Lease shall be amended as follows:

a.Property Insurance. The fourth (4th) sentence of Paragraph 8(c)(i) of the Original Lease shall be amended to delete the following words therefrom:

“as well as an automatic increase in insurance endorsement causing the increase in annual property insurance coverage by 2% per quarter”.

1

3.Miscellaneous.

a.Full Force and Effect. Except as expressly amended hereby, all of the representations, warranties, terms, covenants, conditions and other provisions of the Original Lease shall remain unchanged and shall continue to be, and shall remain, in full force and effect in accordance with their respective terms. The amendments set forth herein shall be limited precisely as provided for herein to the provisions expressly amended herein and shall not be deemed to be an amendment to, waiver of, consent to or modification of any other term or provision of the Original Lease.

b.Conflict. In the event of any conflict between the terms of this Third Amendment and the Original Lease, the terms of this Third Amendment shall control and govern and the provisions of the Original Lease are to be construed in light of the intent of this Third Amendment.

c.Entire Agreement. This Third Amendment sets forth the entire agreement between the Parties regarding the matters set forth herein, superseding all prior agreements and understandings, written and oral, and may not be changed, modified or cancelled orally.

d.Governing Law. This Third Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to any conflicts of law provisions thereof.

e.Further Action. Each Party to this Third Amendment shall execute all instruments and documents and take such further action as may be reasonably required to effectuate the purpose of this Third Amendment.

f.Modification; Amendment: This Third Amendment may be modified or amended only by a writing executed by the Parties hereto.

g.Counterparts. This Third Amendment may be executed in multiple counterparts (including electronic [PDF] or facsimile counterparts), each of which shall be deemed an original, and all such counterparts shall together constitute one and the same instrument.

h.Severability. The invalidity of any portion of this Third Amendment shall not have any effect on the balance thereof.

i.No Broker. Each of Lessee and Lessor represents to the other that it has not dealt with any brokers in connection with this Third Amendment and that no broker negotiated this Third Amendment or is entitled to any commission in connection herewith. Each Party agrees to indemnify, defend and hold the other harmless from and against all claims, demands, actions, liabilities, damages, costs and expenses (including, reasonable attorneys’ fees) arising from any claim for a fee or commission made by any broker claiming to have acted by or on behalf of the indemnifying Party in connection with this Third Amendment. The foregoing indemnity shall survive the expiration or termination of the Lease.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Parties have caused this Third Amendment to be executed by their duly authorized officers or agents on the Third Amendment Effective Date.

ATTEST

LESSOR:	ALIARON INVESTMENTS, LTD. By: Aliaron Investments, Inc. Its: General Partner /s/ Ronald N. Tutor
	Ronald N. Tutor, President Aliaron Investments, Inc.
LESSEE:	TUTOR PERINI CORPORATION /s/ Gary G. Smalley
	Gary G. Smalley, Executive Vice President and Chief Financial Officer

3

EX-10.17

Exhibit 10.17

THIRD AMENDMENT TO FONTANA PROPERTY LEASE

This THIRD AMENDMENT TO FONTANA PROPERTY LEASE (the “Third Amendment”) is made and entered into and effective as of the 19th day of February 2021 (the “Third Amendment Effective Date”) by and between ALIARON INVESTMENTS, LTD., LIMITED PARTNERSHIP, a California limited partnership (formerly known as Kristra Investments, Ltd., Limited Partnership) (“Landlord”), and TUTOR PERINI CORPORATION, a Massachusetts corporation (“Tenant”). (Each individual party may be referred to herein as a “Party” and collectively hereinafter in this Third Amendment as the “Parties”).

WITNESSETH:

WHEREAS, Landlord and Tenant are parties to that certain Fontana Property Lease, dated and effective June 1, 2014, as amended by that certain First Amendment to Commercial Lease Agreement, dated and effective as of October 7, 2020, and as amended by that certain Second Amendment to Fontana Property Lease, dated and effective as of December 28, 2020 (collectively, the “Original Lease”), for the lease of the Premises (as defined in the Original Lease); and

WHEREAS, the Parties desire by this instrument to further amend the Original Lease in accordance with those certain modifications as more particularly set forth herein.

NOW, THEREFORE, the Parties, in consideration of the mutual promises and agreements set forth herein, and intending to be legally bound, on behalf of themselves and their respective successors and assigns, do hereby agree as follows:

1.Recitals and Definitions.

a.Recitals. Landlord and Tenant incorporate the above recitals into this Third Amendment and affirm such recitals are true and correct.

b.Definitions. Each capitalized term used in this Third Amendment shall have the same meaning as is ascribed to such capitalized term in the Original Lease unless expressly otherwise provided for herein. As of the Third Amendment Effective Date and for the purposes of this Third Amendment, the Original Lease, as amended hereby, shall be referred to as the “Lease”.

2.Amendments. The Original Lease shall be amended as follows:

a.Property Insurance. The fourth (4th) sentence of Paragraph 10(D) of the Original Lease shall be amended to delete the following words therefrom:

“as well as an automatic increase in insurance endorsement causing the increase in annual property insurance coverage by 2% per quarter.”

3.Miscellaneous.

a.Full Force and Effect. Except as expressly amended hereby, all of the representations, warranties, terms, covenants, conditions and other provisions of the Original Lease shall remain unchanged and shall continue to be, and shall remain, in full force and effect in accordance with their respective terms. The amendments set forth herein shall be limited precisely as provided for herein to the provisions expressly amended herein and shall not be deemed to be an

1

amendment to, waiver of, consent to or modification of any other term or provision of the Original Lease.

b.Conflict. In the event of any conflict between the terms of this Third Amendment and the Original Lease, the terms of this Third Amendment shall control and govern and the provisions of the Original Lease are to be construed in light of the intent of this Third Amendment.

c.Entire Agreement. This Third Amendment sets forth the entire agreement between the Parties regarding the matters set forth herein, superseding all prior agreements and understandings, written and oral, and may not be changed, modified or cancelled orally.

d.Governing Law. This Third Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to any conflicts of law provisions thereof.

e.Further Action. Each Party to this Third Amendment shall execute all instruments and documents and take such further action as may be reasonably required to effectuate the purpose of this Third Amendment.

f.Modification; Amendment. This Third Amendment may be modified or amended only by a writing executed by the Parties hereto.

g.Counterparts. This Third Amendment may be executed in multiple counterparts (including electronic [PDF] or facsimile counterparts), each of which shall be deemed an original, and all such counterparts shall together constitute one and the same instrument.

h.Severability. The invalidity of any portion of this Third Amendment shall not have any effect on the balance thereof.

i.No Broker. Each of Tenant and Landlord represents to the other that it has not dealt with any brokers in connection with this Third Amendment and that no broker negotiated this Third Amendment or is entitled to any commission in connection herewith. Each Party agrees to indemnify, defend and hold the other harmless from and against all claims, demands, actions, liabilities, damages, costs and expenses (including, reasonable attorneys’ fees) arising from any claim for a fee or commission made by any broker claiming to have acted by or on behalf of the indemnifying Party in connection with this Third Amendment. The foregoing indemnity shall survive the expiration or termination of the Lease.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Parties have caused this Third Amendment to be executed by their duly authorized officers or agents on the Third Amendment Effective Date.

ATTEST

LANDLORD:	ALIARON INVESTMENTS, LTD. By: Aliaron Investments, Inc. Its: General Partner /s/ Ronald N. Tutor
	Ronald N. Tutor, President Aliaron Investments, Inc.
TENANT:	TUTOR PERINI CORPORATION /s/ Gary G. Smalley
	Gary G. Smalley, Executive Vice President and Chief Financial Officer

3

EX-21

Exhibit 21

Tutor Perini Corporation

Subsidiaries of the Registrant

			Percentage
			of Interest
	Business		or Voting
	Segment	Place of	Securities
Name	(as applicable)	Organization	Owned
Tutor Perini Corporation		Massachusetts
Becho, Inc.	Civil	Utah	100	%
Black Construction Corporation	Civil	Guam	100	%
Cherry Hill Construction, Inc.	Civil	Maryland	100	%
Frontier-Kemper Constructors, Inc.	Civil	Indiana	100	%
Lunda Construction Company	Civil	Wisconsin	100	%
Tutor-Saliba Corporation	Civil	California	100	%
James A. Cummings, Inc.	Building	Florida	100	%
Keating Building Company	Building	Delaware	100	%
Perini Management Services, Inc.	Building	Massachusetts	100	%
Roy Anderson Corp	Building	Mississippi	100	%
Rudolph and Sletten, Inc.	Building	California	100	%
Tutor Perini Building Corp.	Building	Arizona	100	%
Desert Mechanical Inc.	Specialty Contractors	Nevada	100	%
Fisk Electric Company	Specialty Contractors	Texas	100	%
Five Star Electric Corp.	Specialty Contractors	New York	100	%
GreenStar Services Corporation	Specialty Contractors	Delaware	100	%
Nagelbush Mechanical, Inc.	Specialty Contractors	Florida	100	%
Superior Gunite	Specialty Contractors	California	100	%
WDF Inc.	Specialty Contractors	New York	100	%
Bow Equipment Leasing Company, Inc.	N/A	New Hampshire	100	%
PCR Insurance Company	N/A	Arizona	100	%

EX-23

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-161492 and 333-174915 on Form S-3 and Registration Statement Nos. 333-116362, 333-138411, Post-effective Amendment No. 1 to Registration Statement Nos. 333-157804, 333-203191, and 333-218287 on Form S-8 of our reports datedFebruary 24, 2021, relating to the financial statements of Tutor Perini Corporation and subsidiaries (the “Company”) and the effectiveness of Company’s internal control over financial reporting appearing in this Annual Report on Form 10-K for the year ended December 31, 2020.

/s/ Deloitte & Touche LLP

Los Angeles, California

February 24, 2021

EX-24

Exhibit 24

Power of Attorney

We, the undersigned, Directors of Tutor Perini Corporation, hereby severally constitute James A. Frost and Gary G. Smalley, and each of them singly, our true and lawful attorneys, with full power to them and to each of them to sign for us, and in our names in the capacities indicated below, any Annual Report on Form 10-K pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission and any and all amendments to said Annual Report on Form 10-K, hereby ratifying and confirming our signatures as they may be signed by our said Attorneys to said Annual Report on Form 10-K and to any and all amendments thereto and generally to do all such things in our names and behalf and in our said capacities as will enable Tutor Perini Corporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission.

WITNESS our hands and common seal on the date set forth below.

/s/Peter Arkley	Director	February 25, 2016
Peter Arkley		Date
/s/Sidney J. Feltenstein	Director	February 26, 2016
Sidney J. Feltenstein		Date
/s/James A. Frost	Director	February 26, 2016
James A. Frost		Date
/s/Michael F. Horodniceanu	Director	May 23, 2018
Michael F. Horodniceanu		Date
/s/Michael R. Klein	Director	February 26, 2016
Michael R. Klein		Date
/s/Robert C. Lieber	Director	February 26, 2016
Robert C. Lieber		Date
/s/Dennis D. Oklak	Director	February 22, 2018
Dennis D. Oklak		Date
/s/Raymond R. Oneglia	Director	February 26, 2016
Raymond R. Oneglia		Date
/s/Dale Anne Reiss	Director	February 26, 2016
Dale Anne Reiss		Date
/s/Dickran M. Tevrizian, Jr.	Director	February 25, 2016
Dickran M. Tevrizian, Jr.		Date
/s/Ronald N. Tutor	Director	February 26, 2016
Ronald N. Tutor		Date

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Ronald N. Tutor, certify that:

1.    I have reviewed this Annual Report on Form 10-K of Tutor Perini Corporation (the “registrant”);

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 24, 2021	/s/Ronald N. Tutor
	Ronald N. Tutor
	Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Gary G. Smalley, certify that:

1.    I have reviewed this Annual Report on Form 10-K of Tutor Perini Corporation (the “registrant”);

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 24, 2021	/s/Gary G. Smalley
	Gary G. Smalley
	Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Tutor Perini Corporation (the “Company”) on Form 10-K for the year ended December 31, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Ronald N. Tutor, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 24, 2021	/s/Ronald N. Tutor
	Ronald N. Tutor
	Chairman and Chief Executive Officer

A signed original of this written statement required by Section 906 has been provided to Tutor Perini Corporation and will be retained by Tutor Perini Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Tutor Perini Corporation (the “Company”) on Form 10-K for the year ended December 31, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gary G. Smalley, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 24, 2021	/s/Gary G. Smalley
	Gary G. Smalley
	Executive Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Tutor Perini Corporation and will be retained by Tutor Perini Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-95

Exhibit 95

MINE SAFETY DISCLOSURE

Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act requires domestic mine operators to disclose violations and orders issued under the Federal Mine Safety and Health Act of 1977 (the “Mine Act”) by the federal Mine Safety and Health Administration (“MSHA”). We do not act as the owner of any mines but we may act as a mining operator as defined under the Mine Act where we may be an independent contractor performing services or construction of such mine. Due to timing and other factors, the data below may not agree with the mine data retrieval system maintained by MSHA.

The following table provides information for the year ended December 31, 2020.

Mine (1)	Mine Act §104 Violations (2)	Mine Act §104 (b) Orders (3)	Mine Act §104 (d) Citations and Orders (4)	Mine Act §110 (b)(2) Violations (5)	Mine Act §107 (a) Orders (6)	Proposed Assessments from MSHA (In dollars ($))		Mining Related Fatalities	Mine Act §104(e) Notice (yes/no) (7)	Pending Legal Action before Federal Mine Safety and Health Review Commission (yes/no)
Longview	5	—	—	—	—	$	1,015	—	No	No

(1)United States mine.

(2)The total number of violations received from MSHA under §104 of the Mine Act, which includes citations for health or safety standards that could significantly and substantially contribute to a serious injury if left unabated.

(3)The total number of orders issued by MSHA under §104(b) of the Mine Act, which represents a failure to abate a citation under §104(a) within the period of time prescribed by MSHA.

(4)The total number of citations and orders issued by MSHA under §104(d) of the Mine Act for unwarrantable failure to comply with mandatory health or safety standards.

(5)The total number of flagrant violations issued by MSHA under §110(b)(2) of the Mine Act.

(6)The total number of orders issued by MSHA under §107(a) of the Mine Act for situations in which MSHA determined an imminent danger existed.

(7)A written notice from the MSHA regarding a pattern of violations, or a potential to have such pattern under §104(e) of the Mine Act.

XML

Cover - USD ($)

12 Months Ended

Dec. 31, 2020

Feb. 19, 2021

Jun. 30, 2020

Cover [Abstract]

Document Type

10-K

Document Annual Report

true

Document Period End Date

Dec. 31, 2020

Current Fiscal Year End Date

--12-31

Document Transition Report

false

Entity File Number

1-6314

Entity Registrant Name

Tutor Perini Corporation

Entity Incorporation, State or Country Code

MA

Entity Tax Identification Number

04-1717070

Entity Address, Address Line One

15901 Olden Street

Entity Address, City or Town

Sylmar

Entity Address, State or Province

CA

Entity Address, Postal Zip Code

91342

City Area Code

818

Local Phone Number

362-8391

Title of 12(b) Security

Common Stock, $1.00 par value

Trading Symbol

TPC

Security Exchange Name

NYSE

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

false

Entity Emerging Growth Company

false

ICFR Auditor Attestation Flag

true

Entity Shell Company

false

Entity Public Float

$ 490,456,469

Entity Common Stock, Shares Outstanding (in shares)

50,913,900

Documents Incorporated by Reference

Documents Incorporated by Reference

The information required by Part III of this Annual Report on Form 10-K, to the extent not set forth herein, is incorporated herein by reference to the registrant’s definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2021, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates.

Entity Central Index Key

0000077543

Amendment Flag

false

Document Fiscal Year Focus

2020

Document Fiscal Period Focus

FY

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
REVENUE	$ 5,318,763	$ 4,450,832	$ 4,454,662
COST OF OPERATIONS	(4,832,610)	(4,209,060)	(4,000,209)
GROSS PROFIT	486,153	241,772	454,453
General and administrative expenses	(223,809)	(226,916)	(262,577)
Goodwill impairment	0	(379,863)	0
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	262,344	(365,007)	191,876
Other income (expense)	(11,853)	6,667	4,256
Interest expense	(76,212)	(67,494)	(63,519)
INCOME (LOSS) BEFORE INCOME TAXES	174,279	(425,834)	132,613
Income tax (expense) benefit	(21,942)	65,609	(34,832)
NET INCOME (LOSS)	152,337	(360,225)	97,781
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	43,943	27,465	14,345
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 108,394	$ (387,690)	$ 83,436
Earnings Per Share, Basic (in dollars per share)	$ 2.14	$ (7.72)	$ 1.67
Earnings Per Share, Diluted (in dollars per share)	$ 2.12	$ (7.72)	$ 1.66
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	50,656	50,220	49,952
Diluted (in shares)	51,077	50,220	50,301

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 152,337	$ (360,225)	$ 97,781
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	(6,261)	844	771
Foreign currency translation adjustments	279	1,337	(2,945)
Unrealized gain (loss) in fair value of investments	1,571	1,561	(778)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(4,411)	3,742	(2,952)
COMPREHENSIVE INCOME (LOSS)	147,926	(356,483)	94,829
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	44,173	27,858	14,124
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 103,753	$ (384,341)	$ 80,705

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents ($105,735 and $103,850 related to VIEs)	$ 374,289	$ 193,685
Restricted cash	77,563	8,416
Restricted investments	78,912	70,974
Accounts receivable ($86,012 and $91,090 related to VIEs)	1,415,063	1,354,519
Retainage receivable ($122,335 and $89,132 related to VIEs)	648,441	562,375
Costs and estimated earnings in excess of billings ($39,846 and $22,764 related to VIEs)	1,236,734	1,123,544
Other current assets ($51,746 and $58,128 related to VIEs)	249,455	197,473
Total current assets	4,080,457	3,510,986
PROPERTY AND EQUIPMENT:
Land	44,167	39,047
Building and improvements	116,422	115,041
Construction equipment	570,675	560,547
Other equipment	192,247	183,197
Total property and equipment, gross	923,511	897,832
Less accumulated depreciation	(434,294)	(388,147)
Total property and equipment, net ($12,840 and $49,919 related to VIEs)	489,217	509,685
GOODWILL	205,143	205,143
INTANGIBLE ASSETS, NET	123,115	155,270
OTHER ASSETS	147,685	104,693
TOTAL ASSETS	5,045,617	4,485,777
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $2,040 and $0	100,188	124,054
Accounts payable ($116,461 and $93,848 related to VIEs)	794,611	682,699
Retainage payable ($26,439 and $13,967 related to VIEs)	315,135	252,181
Billings in excess of costs and estimated earnings ($362,427 and $422,847 related to VIEs)	839,222	844,389
Accrued expenses and other current liabilities ($9,595 and $25,402 related to VIEs)	215,207	206,533
Total current liabilities	2,264,363	2,109,856
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $20,209 and $23,343	925,277	710,422
DEFERRED INCOME TAXES	82,966	35,686
OTHER LONG-TERM LIABILITIES	230,066	199,288
TOTAL LIABILITIES	3,502,672	3,055,252
COMMITMENTS AND CONTINGENCIES (Note 8)
Stockholders' equity:
Preferred stock – authorized 1,000,000 shares ($1 par value), none issued	0	0
Common stock – authorized 112,500,000 and 75,000,000 shares ($1 par value), issued and outstanding 50,827,205 and 50,278,816 shares	50,827	50,279
Additional paid-in capital	1,127,385	1,117,972
Retained earnings	422,385	313,991
Accumulated other comprehensive loss	(46,741)	(42,100)
Total stockholders' equity	1,553,856	1,440,142
Noncontrolling interests	(10,911)	(9,617)
TOTAL EQUITY	1,542,945	1,430,525
TOTAL LIABILITIES AND EQUITY	$ 5,045,617	$ 4,485,777

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalent	$ 374,289	$ 193,685
Accounts receivable	1,415,063	1,354,519
Retainage receivable	648,441	562,375
Costs and estimated earnings in excess of billings	1,236,734	1,123,544
Other current assets	249,455	197,473
Property and equipment, net	489,217	509,685
Unamortized discount and debt issuance costs, current	2,040	0
Accounts payable	794,611	682,699
Retainage payable	315,135	252,181
Billings in excess of costs and estimated earnings	839,222	844,389
Accrued expenses and other current liabilities	215,207	206,533
Unamortized discount and debt issuance costs, non-current	$ 20,209	$ 23,343
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares issued (in shares)	0	0
Common stock, shares authorized (in shares)	112,500,000	75,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued (in shares)	50,827,205	50,278,816
Common stock, shares outstanding (in shares)	50,827,205	50,278,816
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalent	$ 105,735	$ 103,850
Accounts receivable	86,012	91,090
Retainage receivable	122,335	89,132
Costs and estimated earnings in excess of billings	39,846	22,764
Other current assets	51,746	58,128
Property and equipment, net	12,840	49,919
Accounts payable	116,461	93,848
Retainage payable	26,439	13,967
Billings in excess of costs and estimated earnings	362,427	422,847
Accrued expenses and other current liabilities	$ 9,595	$ 25,402

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income (loss)	$ 152,337	$ (360,225)	$ 97,781
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Goodwill impairment	0	379,863	0
Depreciation	74,879	58,818	43,724
Amortization of intangible assets	32,155	6,226	3,543
Share-based compensation expense	11,833	19,143	22,782
Change in debt discounts and deferred debt issuance costs	20,153	13,207	12,072
Deferred income taxes	48,253	(71,609)	(449)
Gain on remeasurement of investment in joint venture	0	(37,792)	0
(Gain) loss on sale of property and equipment	(1,673)	(4,688)	402
Changes in other components of working capital, net of balances acquired	(169,976)	131,257	(156,844)
Other long-term liabilities	4,352	1,863	(2,007)
Other, net	459	467	398
NET CASH PROVIDED BY OPERATING ACTIVITIES	172,772	136,530	21,402
Cash Flows from Investing Activities:
Business acquisition, cash balance acquired net of cash paid	0	6,607	0
Acquisition of property and equipment	(54,781)	(84,196)	(77,069)
Proceeds from sale of property and equipment	14,550	12,581	6,387
Investments in securities	(31,331)	(35,167)	(20,848)
Proceeds from maturities and sales of investments in securities	25,204	24,120	21,322
NET CASH USED IN INVESTING ACTIVITIES	(46,358)	(76,055)	(70,208)
Cash Flows from Financing Activities:
Proceeds from debt	1,301,282	931,594	1,753,160
Repayment of debt	(1,119,887)	(870,277)	(1,738,314)
Business acquisition related payment	0	0	(15,951)
Cash payments related to share-based compensation	(1,397)	(2,363)	(2,671)
Distributions paid to noncontrolling interests	(48,467)	(46,500)	(29,000)
Contributions from noncontrolling interests	3,000	9,813	3,797
Debt issuance, extinguishment and modification costs	(11,194)	(504)	0
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	123,337	21,763	(28,979)
Net increase (decrease) in cash, cash equivalents and restricted cash	249,751	82,238	(77,785)
Cash, cash equivalents and restricted cash at beginning of year	202,101	119,863	197,648
Cash, cash equivalents and restricted cash at end of year	$ 451,852	$ 202,101	$ 119,863

XML

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjustment
Balance at Dec. 31, 2017	$ 1,704,780	$ (5,476)	$ 49,781	$ 1,084,205	$ 622,007	$ (3,762)	$ (42,718)	$ (8,495)	$ (1,714)
Net income (loss)	97,781				83,436			14,345
Other comprehensive income (loss)	(2,952)						(2,731)	(221)
Share-based compensation	21,544			21,544
Issuance of common stock, net	(2,585)		245	(2,830)
Contributions from noncontrolling interests	3,797							3,797
Distributions to noncontrolling interests	(29,000)							(29,000)
Balance at Dec. 31, 2018	1,787,889		50,026	1,102,919	701,681		(45,449)	(21,288)
Net income (loss)	(360,225)				(387,690)			27,465
Other comprehensive income (loss)	3,742						3,349	393
Share-based compensation	17,571			17,571
Reacquisition of equity component from convertible note repurchase, net of taxes	0
Issuance of common stock, net	(2,265)		253	(2,518)
Contributions from noncontrolling interests	9,813							9,813
Distributions to noncontrolling interests	(46,500)							(46,500)
Recognized fair value of noncontrolling interest in joint venture upon consolidation	20,500							20,500
Balance at Dec. 31, 2019	1,430,525		50,279	1,117,972	313,991		(42,100)	(9,617)
Net income (loss)	152,337				108,394			43,943
Other comprehensive income (loss)	(4,411)						(4,641)	230
Share-based compensation	11,928			11,928
Reacquisition of equity component from convertible note repurchase, net of taxes	(764)			(764)
Issuance of common stock, net	(1,203)		548	(1,751)
Contributions from noncontrolling interests	3,000							3,000
Distributions to noncontrolling interests	(48,467)							(48,467)
Balance at Dec. 31, 2020	$ 1,542,945		$ 50,827	$ 1,127,385	$ 422,385		$ (46,741)	$ (10,911)

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

(a) Basis of Presentation

The accompanying consolidated financial statements have been prepared in compliance with generally accepted accounting principles in the United States (“GAAP”) as codified in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”). Certain amounts in the notes to the consolidated financial statements of prior years have been reclassified to conform to the current year presentation.

(b) Principles of Consolidation

The consolidated financial statements include the accounts of Tutor Perini Corporation and its wholly owned subsidiaries (the “Company”). The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with ASC 810, Consolidation (“ASC 810”). If a joint venture is a VIE and the Company is the primary beneficiary, the joint venture is fully consolidated (See Note 13). If a joint venture is not a VIE, it may be consolidated under the voting interest method if the Company holds a controlling financial interest in the joint venture. The Company is considered to hold a controlling financial interest when it is able to exercise control over the joint venture’s operating and financial decisions. For construction joint ventures that do not need to be consolidated, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. Intercompany balances and transactions have been eliminated.

(c) Use of Estimates

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect reported amounts. These estimates are based on information available through the date of the issuance of the financial statements; therefore, actual results could differ from those estimates.

(d) Revenues

Revenue Recognition

The Company derives revenue from long-term construction contracts with public and private customers primarily in the United States and its territories and in certain other international locations. The Company’s construction contracts are generally each accounted for as a single unit of account (i.e., as a single performance obligation).

Throughout the execution of construction contracts, the Company and its affiliated entities recognize revenue with the continuous transfer of control to the customer. The customer typically controls the asset under construction by either contractual termination clauses or by the Company’s rights to payment for work already performed on the asset under construction that does not have an alternative use for the Company.

Because control transfers over time, revenue is recognized to the extent of progress towards completion of the performance obligations. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services provided. The Company generally uses the cost-to-cost method for its contracts, which measures progress towards completion for each performance obligation based on the ratio of costs incurred to date to the total estimated costs at completion for the respective performance obligation. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Revenue, including estimated fees or profits, is recorded proportionately as costs are incurred. Cost of operations includes labor, materials, subcontractor costs, and other direct and indirect costs, including depreciation and amortization.

Due to the nature of the work required to be performed on many of the Company’s performance obligations, estimating total revenue and cost at completion is complex, subject to many variables and requires significant judgment. Assumptions as to the occurrence of future events and the likelihood and amount of variable consideration, including the impact of change orders, claims, contract disputes and the achievement of contractual performance criteria, and award or other incentive fees are made during the contract performance period. The Company estimates variable consideration at the most likely amount it expects to receive. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal

of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of anticipated performance and all information (historical, current and forecasted) that is reasonably available to management. Back charges to suppliers or subcontractors are recognized as a reduction of cost when it is determined that recovery of such cost is probable and the amounts can be reliably estimated. Disputed back charges are recognized when the same requirements described above for variable consideration have been satisfied.

Changes in Estimates on Construction Contracts

The Company’s estimates of contract revenue and cost are highly detailed and many factors change during a contract performance period that result in a change to contract profitability. These factors include, but are not limited to, differing site conditions; availability of skilled contract labor; performance of major material suppliers and subcontractors; on-going subcontractor negotiations and buyout provisions; unusual weather conditions; changes in the timing of scheduled work; change orders; accuracy of the original bid estimate; changes in estimated labor productivity and costs based on experience to date; achievement of incentive-based income targets; and the expected, or actual, resolution terms for claims. The factors that cause changes in estimates vary depending on the maturation of the project within its lifecycle. For example, in the ramp-up phase, these factors typically consist of revisions in anticipated project costs and during the peak and closeout phases, these factors include the impact of change orders and claims, as well as additional revisions in remaining anticipated project costs. Generally, if the contract is at an early stage of completion, the current period impact is smaller than if the same change in estimate is made to the contract at a later stage of completion. Management evaluates changes in estimates on a contract-by-contract basis and discloses significant changes, if material, in the Notes to Consolidated Financial Statements. The cumulative catch-up method is used to account for revisions in estimates.

(e) Depreciation of Property and Equipment and Amortization of Long-Lived Intangible Assets

Property and equipment and long-lived intangible assets are generally depreciated or amortized on a straight-line basis over their estimated useful lives ranging from three to forty years.

(f) Recoverability of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever circumstances indicate that the future cash flows generated by the assets might be less than the assets’ net carrying value. In such circumstances, an impairment loss will be recognized by the amount the assets’ net carrying value exceeds their fair value.

(g) Recoverability of Goodwill

The Company tests goodwill for impairment annually as of October 1 for each reporting unit and between annual tests if events occur or circumstances change which suggest that goodwill should be reevaluated. Such events or circumstances include significant changes in legal factors and business climate, recent losses at a reporting unit, and industry trends, among other factors. The Civil, Building and Specialty Contractors segments each represent a reporting unit, and the Civil reporting unit carried the remaining goodwill balance at December 31, 2020 as a result of the $379.9 million impairment loss recognized in 2019. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using a weighted average of an income and a market approach. These approaches utilize various valuation assumptions, and small changes to the assumptions could have a significant impact on the concluded fair value. The income approach is based on estimated present value of future cash flows for each reporting unit carrying a goodwill balance. The market approach is based on assumptions about how market data relates to each reporting unit carrying a goodwill balance. The weighting of these two approaches is based on their individual correlation to the economics of each reporting unit carrying a goodwill balance. The annual quantitative assessment performed in the fourth quarter of 2020 resulted in an estimated fair value that exceeded the net book value of the Civil reporting unit; therefore, no impairment charge was necessary.

(h) Recoverability of Non-Amortizable Trade Names

Certain trade names have an estimated indefinite life and are not amortized to earnings, but instead are reviewed for impairment annually, or more often if events occur or circumstances change which suggest that the non-amortizable trade names should be reevaluated. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using an income approach (relief from royalty method). The assessment performed in the fourth quarter of 2020 resulted in an estimated fair value for the non-amortizable trade names that exceeded their respective net book values; therefore, no impairment charge was necessary.

(i) Income Taxes

Deferred income tax assets and liabilities are recognized for the effects of temporary differences between the financial statement carrying amounts and the income tax basis of assets and liabilities using tax rates expected to be in effect when such differences reverse. Income tax positions must meet a more-likely-than-not threshold to be recognized. The Company recognizes interest and penalties related to uncertain tax positions as a component of the income tax provision.

(j) Earnings Per Common Share (EPS)

Basic EPS and diluted EPS are calculated by dividing net income attributable to Tutor Perini Corporation by the following: for basic EPS, the weighted-average number of common shares outstanding during the period; and for diluted EPS, the sum of the weighted-average number of both outstanding common shares and potentially dilutive securities, which for the Company can include restricted stock units, unexercised stock options and the Convertible Notes, as defined in Note 7. In accordance with ASC 260, Earnings Per Share, the settlement of the principal amount of the Convertible Notes has no impact on diluted EPS because the Company has the intent and ability to settle the principal amount in cash. See Note 7 for further discussion of the Convertible Notes. The Company calculates the effect of the potentially dilutive restricted stock units and stock options using the treasury stock method.

	Year Ended December 31,
(in thousands, except per common share data)	2020		2019		2018
Net income (loss) attributable to Tutor Perini Corporation	$	108,394	$	(387,690)	$	83,436
Weighted-average common shares outstanding, basic	50,656		50,220		49,952
Effect of dilutive restricted stock units and stock options	421		—		349
Weighted-average common shares outstanding, diluted	51,077		50,220		50,301
Net income (loss) attributable to Tutor Perini Corporation per common share:
Basic	$	2.14	$	(7.72)	$	1.67
Diluted	$	2.12	$	(7.72)	$	1.66
Anti-dilutive securities not included above	1,862		3,640		2,670

For the year ended December 31, 2019, all outstanding restricted stock units and stock options were excluded from the calculation of weighted-average diluted shares outstanding due to the net loss for the period.

(k) Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets to the amounts shown in the Consolidated Statements of Cash Flows:

	As of December 31,
(in thousands)	2020		2019
Cash and cash equivalents available for general corporate purposes	$	210,841	$	43,760
Joint venture cash and cash equivalents	163,448		149,925
Cash and cash equivalents	374,289		193,685
Restricted cash	77,563		8,416
Total cash, cash equivalents and restricted cash	$	451,852	$	202,101

Cash equivalents include short-term, highly liquid investments with maturities of three months or less when acquired. Cash and cash equivalents consist of amounts available for the Company’s general purposes, the Company’s proportionate share of cash held by the Company’s unconsolidated joint ventures and 100% of amounts held by the Company’s consolidated joint ventures. In both cases, cash held by joint ventures is available only for joint venture-related uses, including future distributions to joint venture partners.

As of December 31, 2020, restricted cash consists primarily of $69.9 million held to repay the outstanding principal balance of Convertible Notes described in more detail in Note 7. Restricted cash also includes amounts held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit.

(l) Restricted Investments

The Company has restricted investments primarily held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit. Restricted investments are primarily comprised of investments in U.S. government agency securities and corporate debt securities that are rated A3 or better.

(m) Share-Based Compensation

The Company’s long-term incentive plans allow the Company to grant share-based compensation awards in a variety of forms, including restricted and unrestricted stock units and stock options. Restricted stock units and stock options generally vest subject to service and/or performance requirements, with related compensation expense equal to the fair value of the award on the date of grant and recognized on a straight-line basis over the requisite period. The Company may grant awards that require liability classification and are remeasured at fair value at the end of each reporting period with the change in fair value recognized as compensation cost.

For share-based awards that have a service requirement, the Company accounts for forfeitures upon occurrence, rather than estimating the probability of forfeiture at the date of grant. Accordingly, the Company recognizes the full grant-date fair value of these awards on a straight-line basis throughout the requisite service period, reversing any expense if, and only if, there is a forfeiture.

For share-based awards that have a performance-based vesting requirement, the Company evaluates the probability of achieving the performance criteria throughout the performance period, and will adjust share-based compensation expense if it estimates that the achievement of the performance criteria is not probable. Certain performance-based awards contain market condition components and are valued on the date of grant using a Monte Carlo simulation model. The fair value of such awards is expensed ratably over the performance period and is not adjusted for actual achievement.

(n) Insurance Liabilities

The Company typically utilizes third-party insurance coverage subject to varying deductible levels with aggregate caps on losses retained. The Company assumes the risk for the amount of the deductible portion of the losses and liabilities primarily associated with workers’ compensation and general liability coverage. In addition, on certain projects, the Company assumes the risk for the amount of the deductible portion of losses that arise from any subcontractor defaults. Losses are accrued based upon the Company’s estimates of the aggregate liability for claims incurred using historical experience and certain actuarial assumptions followed in the insurance industry. The estimate of insurance liability within the deductible limits includes an estimate of incurred but not reported claims based on data compiled from historical experience.

(o) Other Comprehensive Income (Loss)

ASC 220, Comprehensive Income, establishes standards for reporting comprehensive income and its components in the consolidated financial statements. The Company reports the change in pension benefit plan assets/liabilities, cumulative foreign currency translation, and change in fair value of investments as components of accumulated other comprehensive income (loss) (“AOCI”).

The components of other comprehensive income (loss) and the related tax effects for the years ended December 31, 2020, 2019 and 2018 were as follows:

	Year Ended December 31,
	2020						2019						2018
(in thousands)	Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount
Other comprehensive income (loss):
Defined benefit pension plan adjustments	$	(8,700)	$	2,439	$	(6,261)	$	1,180	$	(336)	$	844	$	1,079	$	(308)	$	771
Foreign currency translation adjustment	178		101		279		1,867		(530)		1,337		(4,067)		1,122		(2,945)
Unrealized gain (loss) in fair value of investments	2,015		(444)		1,571		1,982		(421)		1,561		(1,005)		227		(778)
Total other comprehensive income (loss)	$	(6,507)	$	2,096	$	(4,411)	$	5,029	$	(1,287)	$	3,742	$	(3,993)	$	1,041	$	(2,952)
Less: Other comprehensive income (loss) attributable to noncontrolling interests(a)	230		—		230		393		—		393		(221)		—		(221)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation	$	(6,737)	$	2,096	$	(4,641)	$	4,636	$	(1,287)	$	3,349	$	(3,772)	$	1,041	$	(2,731)

________________________________________________________________________________________

(a)The only component of other comprehensive income (loss) attributable to noncontrolling interests is foreign currency translation.

The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the years ended December 31, 2020, 2019 and 2018 were as follows:

(in thousands)	Defined Benefit Pension Plan		Foreign Currency Translation		Unrealized Gain (Loss) in Fair Value of Investments		Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance as of December 31, 2017	$	(39,441)	$	(3,591)	$	314	$	(42,718)
Other comprehensive loss before reclassifications	(695)		(2,724)		(835)		(4,254)
Amounts reclassified from AOCI	1,466		—		57		1,523
Balance as of December 31, 2018	$	(38,670)	$	(6,315)	$	(464)	$	(45,449)
Other comprehensive income (loss) before reclassifications	(539)		944		1,621		2,026
Amounts reclassified from AOCI	1,383		—		(60)		1,323
Balance as of December 31, 2019	$	(37,826)	$	(5,371)	$	1,097	$	(42,100)
Other comprehensive income (loss) before reclassifications	(7,993)		49		1,820		(6,124)
Amounts reclassified from AOCI	1,732		—		(249)		1,483
Balance as of December 31, 2020	$	(44,087)	$	(5,322)	$	2,668	$	(46,741)

The significant items reclassified out of AOCI and the corresponding location and impact on the Consolidated Statements of Operations during the years ended December 31, 2020, 2019 and 2018 are as follows:

	Location in Consolidated	Year Ended December 31,
(in thousands)	Statements of Operations	2020		2019		2018
Component of AOCI:
Defined benefit pension plan adjustments	Other income (expense)	$	2,407	$	1,933	$	2,052
Income tax benefit	Income tax expense (benefit)	(675)		(550)		(586)
Net of tax		$	1,732	$	1,383	$	1,466
Unrealized (gain) loss in fair value of investment adjustments	Other income (expense)	$	(315)	$	(76)	$	72
Income tax expense (benefit)	Income tax expense (benefit)	66		16		(15)
Net of tax		$	(249)	$	(60)	$	57

(p) Recent Accounting Pronouncements

In March 2020, the FASB issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). The amendments in ASU 2020-04 provide temporary optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions to ease the potential accounting and financial reporting burden associated with transitioning away from reference rates that are expected to be discontinued, including the London Interbank Offered Rate (“LIBOR”). ASU 2020-04 is effective as of March 12, 2020 through December 31, 2022. The adoption of the new standard has not had and is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance within ASU 2019-04 and ASU 2019-05 (collectively, “ASU 2016-13”). The amendments in ASU 2016-13 replace the incurred loss impairment methodology with the current expected credit loss model, which requires consideration of a broader range of reasonable and supportable information to estimate credit losses. The Company adopted this ASU effective January 1, 2020. The adoption of ASU 2016-13 did not have a material impact on the Company’s financial position, results of operations or cash flows.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), as amended and supplemented by subsequent ASUs (collectively, “ASC 842”). The Company adopted this ASU effective January 1, 2019 using the optional transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. As such, the 2018 comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.

The following recent accounting pronouncements require implementation in future periods.

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). The amendments in ASU 2020-06 simplify accounting for convertible instruments by removing major separation models required under current GAAP. Consequently, more convertible debt instruments will be reported as a single liability instrument with no separate accounting for embedded conversion features. ASU 2020-06 removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception. Also, ASU 2020-06 requires the application of the if-converted method for calculating diluted EPS and the treasury stock method will no longer be available. ASU 2020-06 is effective for interim and annual reporting periods beginning after December 15, 2021, with early adoption permitted. The Company does not expect to early adopt the new standard and does not expect it to have an impact on the Company's financial position, results of operations or cash flows.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”), modifying ASC 740, Income Taxes (“ASC 740”). The amendments in ASU 2019-12, among other things, remove certain exceptions to the general principles in ASC 740 and seek more consistent application by clarifying and amending the existing guidance. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020. The Company is currently evaluating the new standard, which is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

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Consolidated Statements of Cash Flows

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Consolidated Statements of Cash Flows

Consolidated Statements of Cash Flows

Below are the changes in other components of working capital, net of balances related to incremental interest acquired in a Civil segment joint venture during 2019 (see Note 12), as shown in the Consolidated Statements of Cash Flows, the supplemental disclosure of cash paid for interest and income taxes and the supplemental disclosure of non-cash investing activities:

	Year Ended December 31,
(in thousands)	2020		2019		2018
(Increase) Decrease in:
Accounts receivable	$	(104,901)	$	(81,983)	$	3,899
Retainage receivable	(85,769)		(78,520)		56,754
Costs and estimated earnings in excess of billings	(113,190)		18,751		(209,537)
Other current assets	(49,468)		(76,146)		15,398
(Decrease) Increase in:
Accounts payable	111,912		53,999		(78,243)
Retainage payable	62,954		35,013		(49,864)
Billings in excess of costs and estimated earnings	(5,168)		245,292		76,703
Accrued expenses and other current liabilities	13,654		14,851		28,046
Changes in other components of working capital	$	(169,976)	$	131,257	$	(156,844)
Cash paid during the year for:
Interest	$	57,038	$	56,137	$	51,063
Income taxes	$	11,204	$	43,374	$	13,652
Supplemental disclosure of non-cash investing activities:
Real property acquired in settlement of a receivable	$	11,660	$	—	$	—

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Revenue

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Disaggregation of Revenue

The following tables disaggregate revenue by end market, customer type and contract type, which the Company believes best depict how the nature, amount, timing and uncertainty of its revenue and cash flows are affected by economic factors for the years ended December 31, 2020, 2019 and 2018.

	Year Ended December 31,
(in thousands)	2020		2019		2018
Civil segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	1,367,412	$	992,755	$	702,614
Bridges	306,161		334,117		431,202
Military defense facilities	146,969		59,082		26,225
Highways	122,254		86,747		202,423
Water	101,705		33,370		10,195
Other	155,398		273,281		213,434
Total Civil segment revenue	$	2,199,899	$	1,779,352	$	1,586,093

	Year Ended December 31,
(in thousands)	2020		2019		2018
Building segment revenue by end market:
Commercial and industrial facilities	$	580,297	$	459,806	$	374,312
Hospitality and gaming	474,329		297,700		301,871
Municipal and government	287,337		254,736		261,496
Mass transit (includes transportation projects)	218,930		201,400		67,588
Education facilities	173,472		143,382		145,147
Health care facilities	117,968		239,299		428,819
Mixed use	59,391		31,685		150,549
Other	72,917		114,032		131,917
Total Building segment revenue	$	1,984,641	$	1,742,040	$	1,861,699

	Year Ended December 31,
(in thousands)	2020		2019		2018
Specialty Contractors segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	592,430	$	419,402	$	296,092
Commercial and industrial facilities	152,868		186,819		189,632
Multi-unit residential	139,924		83,903		81,023
Water	73,769		37,403		22,390
Mixed use	47,022		64,302		163,308
Education facilities	44,762		70,229		99,214
Other	83,448		67,382		155,211
Total Specialty Contractors segment revenue	$	1,134,223	$	929,440	$	1,006,870

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,875,653	$	534,449	$	533,768	$	2,943,870
Federal agencies	175,933		143,327		75,067		394,327
Private owners	148,313		1,306,865		525,388		1,980,566
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,401,001	$	573,049	$	496,195	$	2,470,245
Federal agencies	116,869		153,467		11,326		281,662
Private owners	261,482		1,015,524		421,919		1,698,925
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,294,630	$	617,133	$	406,782	$	2,318,545
Federal agencies	95,567		201,745		53,335		350,647
Private owners	195,896		1,042,821		546,753		1,785,470
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

State and local agencies. The Company’s state and local government customers include state transportation departments, metropolitan authorities, cities, municipal agencies, school districts and public universities. Services provided to state and local customers are primarily pursuant to contracts awarded through competitive bidding processes. Construction services for state and local government customers have included mass-transit systems, tunnels, bridges, highways, judicial and correctional facilities, schools and dormitories, health care facilities, convention centers, parking structures and other municipal buildings. The vast majority of the Company’s civil contracting and building construction services are provided in locations throughout the United States and its territories.

Federal agencies. The Company’s federal government customers include the U.S. State Department, the U.S. Navy, the U.S. Army Corps of Engineers, the U.S. Air Force and the National Park Service. Services provided to federal agencies are typically pursuant to competitively bid contracts for specific or multi-year assignments that involve new construction or infrastructure repairs or improvements. A portion of revenue from federal agencies is derived from projects in overseas locations.

Private owners. The Company’s private owners (i.e., customers) include real estate developers, health care companies, technology companies, hospitality and gaming resort owners, Native American sovereign nations, public corporations and private universities. Services are provided to private customers through negotiated contract arrangements, as well as through competitive bids.

Most federal, state and local government contracts contain provisions that permit the termination of contracts, in whole or in part, for the convenience of government customers, among other reasons.

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,792,765	$	508,655	$	1,010,973	$	3,312,393
Guaranteed maximum price	1,829		1,136,782		15,417		1,154,028
Unit price	392,548		867		83,257		476,672
Cost plus fee and other	12,757		338,337		24,576		375,670
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,315,195	$	561,831	$	769,410	$	2,646,436
Guaranteed maximum price	6,951		752,110		21,291		780,352
Unit price	436,015		12,063		91,803		539,881
Cost plus fee and other	21,191		416,036		46,936		484,163
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,054,473	$	377,538	$	857,742	$	2,289,753
Guaranteed maximum price	15,709		1,040,093		62,132		1,117,934
Unit price	469,305		32,468		32,562		534,335
Cost plus fee and other	46,606		411,600		54,434		512,640
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

Fixed price. Fixed price or lump sum contracts are most commonly used for projects in the Civil and Specialty Contractors segments and generally commit the Company to provide all of the resources required to complete a project for a fixed sum. Usually, fixed price contracts transfer more risk to the Company, but offer the opportunity for greater profits. Billings on fixed price contracts are typically based on estimated progress against predetermined contractual milestones.

Guaranteed maximum price (“GMP”). GMP contracts provide for a cost plus fee arrangement up to a maximum agreed upon price. These contracts place risks on the Company for amounts in excess of the GMP, but may permit an opportunity for greater profits than under cost plus fee contracts through sharing agreements with the owner on any cost savings that may be realized. Services provided by our Building segment to various private customers are often performed under GMP contracts. Billings on GMP contracts typically occur on a monthly basis and are based on actual costs incurred plus a negotiated margin.

Unit price. Unit price contracts are most prevalent for projects in the Civil and Specialty Contractors segments and generally commit the Company to provide an estimated or undetermined number of units or components that comprise a project at a fixed price per unit. This approach shifts the risk of estimating the quantity of units required to the project owner, but the risk of increased cost per unit is borne by the Company, unless otherwise allowed for in the contract. Billings on unit price contracts typically occur on a monthly basis and are based on actual quantity of work performed or completed during the billing period.

Cost plus fee. Cost plus fee contracts are used for many projects in the Building and Specialty Contractors segments. Cost plus fee contracts include cost plus fixed fee contracts and cost plus award fee contracts. Cost plus fixed fee contracts provide for reimbursement of approved project costs plus a fixed fee. Cost plus award fee contracts provide for reimbursement of the project costs plus a base fee, as well as an incentive fee based on cost and/or schedule performance. Cost plus fee contracts serve to minimize the Company’s financial risk, but may also limit profits. Billings on cost plus fee contracts typically occur on a monthly basis based on actual costs incurred plus a negotiated margin.

Changes in Contract Estimates that Impact Revenue

Changes to the total estimated contract revenue or cost for a given project, either due to unexpected events or revisions to management’s initial estimates, are recognized in the period in which they are determined. Revenue was negatively impacted during the year ended December 31, 2020 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $77.0 million for various projects. Revenue was negatively impacted during the year ended December 31, 2019 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $177.5 million for various projects, including a $123.9 million revenue impact that resulted from the charge related to the Alaskan Way Viaduct (SR 99) Matter discussed in Note 8. Revenue was positively impacted during the year ended December 31, 2018 related to performance obligations satisfied (or partially satisfied) in prior periods by a net $19.4 million for various projects.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. As of December 31, 2020, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $4.8 billion, $1.5 billion and $1.8 billion for the Civil, Building and Specialty Contractors segments, respectively. As of December 31, 2019, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $5.2 billion, $2.2 billion and $2.2 billion for the Civil, Building and Specialty Contractors segments, respectively. The Company typically recognizes revenue on Civil segment projects over a period of three to five years, whereas for projects in the Building and Specialty Contractors segments, the Company typically recognizes revenue over a period of one to three years.

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Contract Assets And Liabilities

12 Months Ended

Dec. 31, 2020

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Contract Assets And Liabilities

Contract Assets and Liabilities

The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets include amounts due under retainage provisions, costs and estimated earnings in excess of billings and capitalized contract costs. The amounts as included on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage receivable	$	648,441	$	562,375
Costs and estimated earnings in excess of billings:
Claims	752,783		705,993
Unapproved change orders	415,489		362,264
Other unbilled costs and profits	68,462		55,287
Total costs and estimated earnings in excess of billings	1,236,734		1,123,544
Capitalized contract costs	74,452		80,294
Total contract assets	$	1,959,627	$	1,766,213

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances, such as contract-specific terms, project performance and other variables that may arise as the Company makes progress toward completion. As of December 31, 2020, the amount of retainage receivable estimated by management to be collected beyond one year is approximately 38% of the balance.

Costs and estimated earnings in excess of billings represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Costs and estimated earnings in excess of billings result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”), but a portion of the revenue recorded cannot be billed currently due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to

the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings. As discussed in Note 8, the resolution of these claims and unapproved change orders may require litigation or other forms of dispute resolution proceedings. Other unbilled costs and profits are billable in accordance with the billing terms of each of the existing contractual arrangements and, as such, the timing of contract billing cycles can cause fluctuations in the balance of unbilled costs and profits. Ultimate resolution of other unbilled costs and profits typically involves incremental progress toward contractual requirements or milestones. The amount of costs and estimated earnings in excess of billings as of December 31, 2020 estimated by management to be collected beyond one year is approximately $756.2 million.

Capitalized contract costs primarily represent costs to fulfill a contract that (1) directly relate to an existing or anticipated contract, (2) generate or enhance resources that will be used in satisfying performance obligations in the future and (3) are expected to be recovered through the contract, and are included in other current assets. Capitalized contract costs are generally expensed to the associated contract over the period of anticipated use on the project. During the years ended December 31, 2020, 2019 and 2018, $46.7 million, $33.8 million and $16.3 million, respectively, of previously capitalized contract costs were amortized and recognized as expense on the related contracts.

Contract liabilities include amounts owed under retainage provisions and billings in excess of costs and estimated earnings. The amount as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage payable	$	315,135	$	252,181
Billings in excess of costs and estimated earnings	839,222		844,389
Total contract liabilities	$	1,154,357	$	1,096,570

Retainage payable represents amounts invoiced to the Company by subcontractors where payments have been partially withheld pending the completion of certain milestones, other contractual conditions or upon the completion of the project. Generally, retainage payable is not remitted to subcontractors until the associated retainage receivable from customers is collected. As of December 31, 2020, the amount of retainage payable estimated by management to be remitted beyond one year is approximately 38% of the balance.

Billings in excess of costs and estimated earnings represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue. Revenue recognized during the years ended December 31, 2020, 2019 and 2018 and included in the opening billings in excess of costs and estimated earnings balances for each period totaled $690.7 million, $479.6 million and $382.7 million, respectively.

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Income Taxes

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Income (loss) before taxes is summarized as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
United States operations	$	138,426	$	(456,403)	$	106,222
Foreign and U.S. territory operations	35,853		30,569		26,391
Total	$	174,279	$	(425,834)	$	132,613

The income tax expense (benefit) is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Current (benefit) expense:
Federal	$	(36,159)	$	(2,884)	$	21,055
State	(1,282)		3,585		8,676
Foreign and U.S. territories	11,130		5,299		5,550
Total current (benefit) expense:	(26,311)		6,000		35,281
Deferred expense (benefit):
Federal	38,667		(43,579)		(1,773)
State	10,608		(27,566)		1,278
Foreign and U.S. territories	(1,022)		(464)		46
Total deferred expense (benefit):	48,253		(71,609)		(449)
Total expense (benefit):	$	21,942	$	(65,609)	$	34,832

The following table is a reconciliation of the Company’s income tax provision at the statutory federal tax rate to the Company’s effective tax rate:

	Year Ended December 31,
	2020				2019				2018
(dollars in thousands)	Amount		Rate		Amount		Rate		Amount		Rate
Federal income tax expense (benefit) at statutory tax rate	$	36,599	21.0	%	$	(89,425)	21.0	%	$	27,849	21.0	%
State income taxes, net of federal tax benefit	8,518		4.9		(18,442)		4.3		9,011		6.8
Stock based compensation	3,185		1.8		1,706		(0.4)		—		—
Impact of federal tax law changes	(14,476)		(8.3)		—		—		211		0.2
Officers' compensation	2,486		1.4		2,938		(0.7)		3,078		2.3
Goodwill impairment	—		—		43,990		(10.3)		—		—
Noncontrolling interests	(9,799)		(5.6)		(6,064)		1.4		(3,232)		(2.4)
Federal R&D credits	(3,007)		(1.7)		(3,998)		0.9		(2,658)		(2.0)
Reversal of reserve for uncertain tax positions due to statute expirations	(489)		(0.3)		(773)		0.2		(1,958)		(1.5)
Foreign tax rate differences	1,491		0.9		4,940		(1.2)		(19)		—
Other	(2,566)		(1.5)		(481)		0.2		2,550		1.9
Income tax expense (benefit)	$	21,942	12.6	%	$	(65,609)	15.4	%	$	34,832	26.3	%

The Company's provision for income taxes and effective tax rate for the year ended December 31, 2020 was significantly impacted by a change in tax law. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. A major provision of the CARES Act allows net operating losses from the 2018, 2019 and 2020 tax years to be carried back up to five years. As a result, for the year ended December 31, 2020, the Company was able to recognize tax benefits substantially in excess of the current federal statutory rate of 21% due to the effects of carrying back its net operating loss arising in 2019 to tax years in which the federal statutory rate was 35%.

The Company’s provision for income taxes and effective tax rate for the year ended December 31, 2019 was significantly impacted by the goodwill impairment charge discussed in Note 6. Of the total goodwill impairment charge of $379.9 million, approximately $209.5 million pertained to goodwill that was not tax deductible and yielded permanent differences between book income and taxable income. For the year ended December 31, 2019, the Company recognized U.S. federal and state tax benefits totaling $49.4 million as a result of the impairment charge.

The following is a summary of the significant components of the deferred tax assets and liabilities:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets:
Timing of expense recognition	$	24,470	$	44,761
Net operating losses	19,968		23,711
Goodwill	19,315		26,658
Other, net	10,155		17,098
Deferred tax assets	73,908		112,228
Valuation allowance	—		(2,212)
Net deferred tax assets	73,908		110,016
Deferred tax liabilities:
Intangible assets, due primarily to purchase accounting	(15,212)		(15,309)
Fixed assets	(76,567)		(75,461)
Construction contract accounting	(9,769)		(13,464)
Joint ventures	(41,669)		(24,331)
Other	(11,962)		(16,567)
Deferred tax liabilities	(155,179)		(145,132)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

As of December 31, 2020, the Company had net operating loss carryforwards for income tax purposes in various states totaling $196.5 million with expiration dates ranging from 2022 to 2039, and no net operating loss carryforwards for federal income tax purposes. As of December 31, 2019, the Company had federal and various state net operating loss carryforwards for income tax purposes of $29.3 million and $184.8 million, respectively. As of December 31, 2020, the Company had federal and state credit carryforwards of approximately $1.4 million and $2.0 million, respectively. As of December 31, 2019, the Company had federal and state credit carryforwards of approximately $6.0 million and $1.2 million, respectively.

The net deferred tax liabilities are presented in the Consolidated Balance Sheets as follows:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets	$	1,695	$	570
Deferred tax liabilities	(82,966)		(35,686)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

The Company’s policy is to record interest and penalties on unrecognized tax benefits as an element of income tax expense. The cumulative amounts related to interest and penalties are added to the total unrecognized tax liabilities on the balance sheet. The total amount of gross unrecognized tax benefits as of December 31, 2020 that, if recognized, would affect the effective tax rate is $8.7 million. The Company does not expect any significant release of unrecognized tax benefits within the next twelve months.

The Company accounts for its uncertain tax positions in accordance with GAAP. The following is a reconciliation of the beginning and ending amounts of these unrecognized tax benefits for the three years ended December 31, 2020:

	As of December 31,
(in thousands)	2020		2019		2018
Beginning balance	$	5,682	$	4,998	$	6,495
Change in tax positions of prior years	2,286		351		(302)
Change in tax positions of current year	1,202		1,106		763
Reduction in tax positions for statute expirations	(489)		(773)		(1,958)
Ending Balance	$	8,681	$	5,682	$	4,998

The Company conducts business internationally and, as a result, one or more of its subsidiaries files income tax returns in U.S. federal, U.S. state and certain foreign jurisdictions. Accordingly, in the normal course of business, the Company is subject to examination by taxing authorities principally throughout the United States, Guam and Canada. The Company's open tax years for a U.S. federal income tax audit are for fiscal years 2017 and later, although there is currently no audit being conducted by the Internal Revenue Service. The Company has various years open to audit in a number of state and local jurisdictions and is currently under audit by certain state taxing authorities.

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Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

The following table presents the changes in the carrying amount of goodwill since its inception through December 31, 2020:

(in thousands)	Civil		Building		Specialty Contractors		Total
Gross goodwill as of December 31, 2018	$	492,074	$	424,724	$	156,193	$	1,072,991
Accumulated impairment as of December 31, 2018	(76,716)		(411,269)		—		(487,985)
Goodwill as of December 31, 2018	415,358		13,455		156,193		585,006
2019 impairment	(210,215)		(13,455)		(156,193)		(379,863)
Goodwill as of December 31, 2019	205,143		—		—		205,143
Current year activity	—		—		—		—
Goodwill as of December 31, 2020(a)	$	205,143	$	—	$	—	$	205,143

_____________________________________________________________________________________________________________

(a)As of December 31, 2020, accumulated impairment was $867.8 million.

The Company performed its annual impairment test in the fourth quarter of 2020 and concluded goodwill was not impaired. In addition, the Company determined that no triggering events occurred and no circumstances changed since the date of our annual impairment test that would more likely than not reduce the fair value of the Civil reporting unit below its carrying amount.

During the year ended December 31, 2020, the novel coronavirus (“COVID-19”) pandemic, as well as the actions taken to contain and mitigate its public health effects, caused disruptions in domestic and global economies and financial markets. The vast majority of the Company’s projects, especially in its Civil reporting unit, have been designated as essential business, which allows the Company to continue its work on those projects. However, due to the fluidity of the pandemic, uncertainties as to its scope and duration, and ongoing changes in the way that governments, businesses and individuals are affected, the pandemic's future impact on the Company’s business, financial condition or performance remains uncertain. Among other things, governments could prohibit the continuation of certain projects that to date have been designated as “essential” or could impose health, safety and other operational requirements on such projects that could result in delays or suspensions of such projects. In addition, employees and contractors working on such projects could be unable or unwilling to continue working on them, perhaps for extended periods, because they may be unable or unwilling to be immunized against COVID-19, or for other reasons. The COVID-19 pandemic also could negatively affect the ability of counterparties or joint venture partners to make required payments on a timely basis or at all.

The Company considered the above factors in its annual impairment test in the fourth quarter of 2020. The Company will continue to monitor events and circumstances for changes that indicate the Civil reporting unit goodwill would need to be reevaluated for impairment during future interim periods prior to the annual impairment test. These future events and

circumstances include, but are not limited to, changes in the overall financial performance of the Civil reporting unit, impacts to our business as a result of the COVID-19 pandemic, as well as other quantitative and qualitative factors which could indicate potential triggering events for possible impairment.

Second Quarter of 2019 Goodwill Impairment

The net change in the carrying amount of goodwill for the year ended December 31, 2019 was primarily due to a goodwill impairment charge of $379.9 million recorded in the second quarter of 2019. In connection with the preparation of its quarterly financial statements during the second quarter of 2019, the Company assessed the changes in circumstances that occurred during the quarter to determine whether it was more likely than not that the fair values of any of its reporting units were below their carrying amounts. While there was no single determinative event or factor, potential triggering events identified in the accounting guidance (ASC 350, Intangibles – Goodwill and Other) developed during the second quarter of 2019, which led the Company to conclude that, when considering the events and factors in totality, it was more likely than not that the fair values of each of its reporting units were below their carrying amounts. The triggering factors included:

•The Company faced a declining stock price and observed a sustained decrease subsequent to the filing of the Company’s first quarter Form 10-Q on May 8, 2019, in both absolute terms and relative to its peers. Consistent with the average stock prices of companies in its peer group, the Company’s stock price had been trending lower over several prior periods; however, during the second quarter of 2019, the Company’s stock price dropped to a 52-week low while the average stock price of companies in its peer group increased. The Company believes that delays experienced in resolving certain claims and unapproved change orders, which when combined with the increased working capital needs and significant negative operating cash flows in the first quarter of 2019, has contributed significantly to the sustained decrease in the Company’s stock price;

•The Company experienced significant negative operating cash flows from each of its reporting units in the first quarter of 2019, and that trend continued at the beginning of the second quarter; and

•The Company’s debt rating was downgraded by a major credit rating agency on May 17, 2019.

As the Company determined that it was more likely than not that the fair values of its reporting units were below their carrying amounts, the Company performed an interim impairment test as of June 1, 2019 (the “Interim Test”) and, as described below, recognized a non-cash impairment loss totaling $379.9 million.

The decrease in the Company’s stock price reduced its total market capitalization and increased the implied control premium to a level beyond observable market-comparable data. As a result, when performing the Interim Test, the Company increased the discount rates and the projected investments in working capital compared to the assumptions used in the previous October 1, 2018 test, which extended the timing of certain expected future cash flows in the calculation of fair value under the income-based approach. The Company believes these changes were consistent with market participant inputs as reflected in the decrease in the Company’s market valuation at that time.

Consistent with the previous October 1, 2018 test, the Company utilized a weighted average of (1) an income approach and (2) a market approach to determine the fair value of the Company and each of its reporting units for the Interim Test. The income approach was based on estimated present value of future cash flows for each reporting unit. The market approach was based on assumptions about how market data relates to each reporting unit. The weighting of these two approaches was based on their individual correlation to the economics of each reporting unit as impacted by factors such as the availability of comparable market data for each reporting unit.

Assessing impairment inherently involves management judgments as to the assumptions used to calculate fair value of the reporting units and the impact of market conditions on those assumptions. The key inputs that the Company uses in its assumptions to estimate the fair value of its reporting units under the income-based approach are as follows:

•Weighted-average cost of capital (“WACC”), the risk-adjusted rate used to discount the projected cash flows;

•Cash flows generated from existing work and new awards; and

•Projected operating margins.

Expected future after-tax operating cash flows of each reporting unit are discounted to a present value using a risk-adjusted discount rate. Estimates of future cash flows require management to make significant assumptions concerning future operating performance including cash flows generated from existing work and new awards, projected operating margins, variations in the amount and timing of cash flows and the probability of achieving the estimated cash flows, as well as future economic conditions, which may differ from actual future cash flows. The discount rate, which is intended to reflect the risks inherent in future cash flow projections, used in estimating the present value of future cash flows, is based on estimates of the WACC of

market participants relative to the reporting units. Financial and credit market volatility can directly impact certain inputs and assumptions used to develop the WACC.

To develop the cash flows generated from new awards and future operating margins, the Company tracks known prospects of significance for each of its reporting units and considers the estimated timing of when the work is expected to be bid, started and completed. The Company also gives consideration to its relationships with the prospective owners; the pool of competitors that are capable of performing large, complex work; business strategy; and the Company’s history of success in winning new work in each reporting unit. With regard to operating margins, the Company gives consideration to its historical reporting unit operating margins in the end markets that the prospective work opportunities are most significant, expected margins from existing work, current market trends in recent new work procurement, and business strategy.

The Company also estimated the fair value of its reporting units under a market-based approach by applying industry-comparable multiples of revenues and operating earnings to its reporting units’ revenues and operating earnings. The conditions and prospects of companies in the engineering and construction industry depend on common factors such as overall demand for services.

The Company believes that the discount rates, timing of cash flows and other inputs and assumptions used in the Interim Test were consistent with those that a market participant would use based on the events described above which occurred during the second quarter of 2019 and were reflective of the market assessment of the fair value of its reporting units at that time. In addition, the Company believes that its estimates and assumptions about future revenues and margin projections in the Interim Test were reasonable and consistent with the estimates and assumptions used in the annual goodwill impairment test as of October 1, 2018. As an additional step to corroborate the Interim Test results, the Company compared its implied control premium with those of recent comparable market transactions and concluded that the implied control premium was within the range of control premiums observed in prior industry-specific M&A transactions.

The assumption changes described above were relatively larger in the Specialty Contractors reporting unit than in the Civil or Building reporting units, as Specialty Contractors had not met recent market expectations at the time of the Interim Test.

Intangible Assets

Intangible assets consist of the following:

	As of December 31, 2020								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(23,754)		(23,232)		27,364		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(22,103)		(16,645)		1,052		12 years
Construction contract backlog	149,290		(105,001)		—		44,289		3 years
Total	$	387,040	$	(150,858)	$	(113,067)	$	123,115

	As of December 31, 2019								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(21,267)		(23,232)		29,851		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(21,048)		(16,645)		2,107		12 years
Construction contract backlog	149,290		(76,388)		—		72,902		3 years
Total	$	387,040	$	(118,703)	$	(113,067)	$	155,270

The Company performs its annual quantitative impairment assessment during the fourth quarter of each year for non-amortizable trade names. If the estimated fair value for the non-amortizable trade names exceeds their respective net book

values, no impairment charge is necessary. Other amortizable intangible assets are reviewed for impairment whenever circumstances indicate that the future cash flows generated by the assets might be less than the assets’ net carrying value. The Company had no impairment of intangible assets during the years ended December 31, 2020 or 2019.

Amortization expense related to amortizable intangible assets was $32.2 million and $6.2 million for the years ended December 31, 2020 and 2019, respectively. The increase in accumulated amortization for construction contract backlog was due to the acquisition of an additional interest in a joint venture during the fourth quarter of 2019, as discussed in Note 12. Future amortization expense related to amortizable intangible assets for the years 2021 and 2022 will be approximately $32.4 million and $17.9 million, respectively, $2.5 million for the years 2023, 2024 and 2025, and $14.9 million thereafter.

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Financial Commitments

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Financial Commitments

Financial Commitments

Long-Term Debt

Long-term debt as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
2017 Senior Notes	$	495,271	$	494,365
Term Loan B	408,458		N/A
2020 Revolver	—		N/A
2017 Credit Facility	N/A		114,000
Convertible Notes(a)	67,878		182,292
Equipment financing and mortgages	47,594		39,159
Other indebtedness	6,264		4,660
Total debt	1,025,465		834,476
Less: Current maturities	100,188		124,054
Long-term debt, net	$	925,277	$	710,422

_____________________________________________________________________________________________________________

(a)The Company will repurchase or retire the remaining Convertible Notes at or before their June 15, 2021 maturity using proceeds from the Term Loan B, $69.9 million of which is currently held in a restricted cash account for this purpose.

The following table reconciles the outstanding debt balances to the reported debt balances as of December 31, 2020 and 2019:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Outstanding Debt		Unamortized Discounts and Issuance Costs		Debt, as reported		Outstanding Debt		Unamortized Discount and Issuance Costs		Debt, as reported
2017 Senior Notes	$	500,000	$	(4,729)	$	495,271	$	500,000	$	(5,635)	$	494,365
Term Loan B	423,938		(15,480)		408,458		N/A		N/A		N/A
Convertible Notes	69,918		(2,040)		67,878		200,000		(17,708)		182,292

The unamortized issuance costs related to the 2020 Revolver were $2.6 million as of December 31, 2020 and are included in other assets on the Consolidated Balance Sheets. The unamortized issuance costs related to the 2017 Credit Facility, which was terminated on August 18, 2020 (as discussed below) were $3.7 million as of December 31, 2019 and were included in other assets on the Consolidated Balance Sheets.

2020 Credit Agreement

On August 18, 2020, the Company entered into a new credit agreement (the “2020 Credit Agreement”) with BMO Harris Bank N.A., as Administrative Agent, Swing Line Lender and L/C Issuer and other lenders. The 2020 Credit Agreement provides for a $425.0 million term loan B facility (the “Term Loan B”) and a $175.0 million revolving credit facility (the “2020 Revolver”), with sublimits for the issuance of letters of credit and swing line loans up to the aggregate amounts of $75.0 million and $10.0 million, respectively. The Term Loan B will mature on August 18, 2027 and the 2020 Revolver will mature on August 18, 2025, in each case, unless any of the 2017 Senior Notes are outstanding on January 30, 2025 (which is 91 days prior

to the maturity of the 2017 Senior Notes), in which case, both the Term Loan B and the 2020 Revolver will mature on January 30, 2025 (subject to certain further exceptions).

The 2020 Credit Agreement permits the Company to repay any or all borrowings outstanding under the 2020 Credit Agreement at any time prior to maturity without penalty, except that the Company must pay a 1.00% premium in respect to the Term Loan B in connection with any transactions that reduce the yield applicable to the Term Loan B within the first twelve months after August 18, 2020 (subject to certain further exceptions). The 2020 Credit Agreement requires the Company to make regularly scheduled payments of principal on the Term Loan B in quarterly installments equal to 0.25% of the initial principal amount of the Term Loan B. The 2020 Credit Agreement also requires the Company to make prepayments on the Term Loan B in connection with certain asset sales, receipts of insurance proceeds, incurrences of unpermitted indebtedness and annual excess cash flow (subject to certain exceptions).

Subject to certain exceptions, at any time prior to maturity, the 2020 Credit Agreement provides the Company with the right to increase the commitments under the 2020 Revolver and/or to establish one or more term loan facilities in an aggregate amount up to (i) the greater of $173.5 million and 50% LTM EBITDA (as defined in the 2020 Credit Agreement) plus (ii) additional amounts if (A) in the case of pari passu first lien secured indebtedness, the First Lien Net Leverage Ratio (as defined in the 2020 Credit Agreement) does not exceed 1.35:1.00, (B) in the case of junior lien secured indebtedness, the Total Net Leverage Ratio (as defined in the 2020 Credit Agreement) does not exceed 3.50:1.00 and (C) in the case of unsecured indebtedness, (x) the Total Net Leverage Ratio does not exceed 3.50:1.00 or (y) the Fixed Charge Coverage Ratio (as defined in the 2020 Credit Agreement) is no less than 2.00:1.00.

Borrowings under the 2020 Credit Agreement bear interest, at the Company’s option, at a rate equal to (i) (a) LIBOR or (b) a base rate (determined by reference to the highest of (1) the administrative agent’s prime lending rate, (2) the federal funds effective rate plus 50 basis points and (3) the LIBOR rate for a one-month interest period plus 100 basis points) plus, (ii) an applicable margin. The margin applicable to the Term Loan B is between 4.50% and 4.75% for LIBOR and between 3.50% and 3.75% for base rate (which was initially 4.75% for LIBOR and 3.75% for base rate), and, in each case, is based on the Total Net Leverage Ratio. The margin applicable to the 2020 Revolver is between 4.25% and 4.75% for LIBOR and 3.25% and 3.75% for base rate (which was initially 4.75% for LIBOR and 3.75% for base rate), and, in each case, is based on the First Lien Net Leverage Ratio. In addition to paying interest on outstanding principal under the 2020 Credit Agreement, the Company will pay a commitment fee to the lenders under the 2020 Revolver in respect of the unutilized commitments thereunder. The Company will pay customary letter of credit fees. If a payment or bankruptcy event of default occurs and is continuing, the otherwise applicable margin on overdue amounts will be increased by 2% per annum. The agreement includes provisions for the replacement of LIBOR with an alternative benchmark rate in the event LIBOR is discontinued. The weighted-average annual interest rate on borrowings under the 2020 Revolver was 6.74% during the year ended December 31, 2020.

The 2020 Credit Agreement requires, with respect to the 2020 Revolver only, the Company and its restricted subsidiaries to maintain a maximum First Lien Net Leverage Ratio range of 2.75:1:00, stepping down to 2.25:1.00 beginning the quarter ending March 31, 2022. The 2020 Credit Agreement also includes certain customary representations and warranties, affirmative covenants and events of default. Subject to certain exceptions, substantially all of the Company’s existing and future material wholly-owned subsidiaries unconditionally guarantee the obligations of the Company under the 2020 Credit Agreement; additionally, subject to certain exceptions, the obligations are secured by a lien on substantially all of the assets of the Company and its subsidiaries guaranteeing these obligations.

As of December 31, 2020, the entire $175 million was available under the 2020 Revolver and the Company had not utilized the 2020 Revolver for letters of credit. The Company was in compliance with the financial covenants under the 2020 Credit Agreement for the period ended December 31, 2020.

Termination of 2017 Credit Facility

On April 20, 2017, the Company entered into a credit agreement (the “2017 Credit Facility”) with SunTrust Bank, now known as Truist Bank, as Administrative Agent, Swing Line Lender and L/C Issuer and a syndicate of other lenders. The 2017 Credit Facility provided for a $350 million revolving credit facility (the “2017 Revolver”) and a sublimit for the issuance of letters of credit and swing line loans up to the aggregate amount of $150 million and $10 million, respectively, both maturing on April 20, 2022 unless any of the Convertible Notes, as defined below, were outstanding on December 17, 2020, in which case all such borrowings would have matured on December 17, 2020 (the “spring-forward provision”).

On August 18, 2020, the Company used proceeds from the Term Loan B to repay outstanding amounts under the 2017 Credit Facility. As a result of repaying the outstanding amounts under the 2017 Credit Facility and entering into the 2020 Credit Agreement, the Company terminated the 2017 Credit Facility, including its spring-forward provision that would have accelerated the maturity of the facility to December 17, 2020.

The weighted-average annual interest rate on borrowings under the 2017 Revolver was 3.55% during the year ended December 31, 2020. At December 31, 2019, the balance outstanding on the 2017 Revolver of $114 million was included in “Current maturities of long-term debt” on the Consolidated Balance Sheet.

Convertible Notes

On June 15, 2016, the Company issued $200 million of 2.875% Convertible Senior Notes due June 15, 2021 (the “Convertible Notes”) in a private placement offering. On August 19, 2020, the Company used proceeds from the Term Loan B to repurchase $130.1 million aggregate principal amount of the Convertible Notes for an aggregate purchase price of $132.4 million (including accrued and unpaid interest to the repurchase date). At December 31, 2020, $69.9 million ($67.9 million net of unamortized discount and debt issuance costs) of the Convertible Notes remain outstanding and are included in “Current maturities of long-term debt” on the Consolidated Balance Sheet. The Company will repurchase or retire at or before maturity the remaining Convertible Notes and repay the principal balance using proceeds from the Term Loan B, which are currently held in a restricted cash account for this purpose.

The Convertible Notes are unsecured obligations of the Company and do not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company. The Convertible Notes bear interest at a rate of 2.875% per year, payable in cash semi-annually in June and December.

To account for the Convertible Notes, the Company applied the provisions of ASC 470-20, Debt with Conversion and Other Options (“ASC 470-20”). ASC 470-20 requires issuers of certain convertible debt instruments that may be settled in cash upon conversion to separately account for the liability (debt) and equity (conversion option) components of the instrument in a manner that reflects the issuer’s nonconvertible debt borrowing rate. This is done by allocating the proceeds from issuance to the liability component based on the fair value of the debt instrument excluding the conversion feature, with the residual allocated to the equity component and classified in additional paid in capital. The $46.8 million difference between the initial principal amount of the Convertible Notes ($200.0 million) and the proceeds initially allocated to the liability component ($153.2 million) is treated as a discount on the Convertible Notes. This difference is being amortized as non-cash interest expense using the interest method, as shown below under Interest Expense. The equity component, however, is not subject to amortization nor subsequent remeasurement.

In addition, ASC 470-20 requires that the debt issuance costs associated with a convertible debt instrument be allocated between the liability and equity components in proportion to the allocation of the debt proceeds between these two components. The debt issuance costs attributable to the liability component of the Convertible Notes ($5.1 million) are also treated as a discount on the Convertible Notes and amortized as non-cash interest expense. The debt issuance costs attributable to the equity component ($1.5 million) were netted with the equity component and are not amortized.

The following table presents information related to the liability and equity components of the Convertible Notes:

(in thousands)	December 31, 2020		December 31, 2019
Liability component:
Principal	$	69,918	$	200,000
Conversion feature	(46,800)		(46,800)
Allocated debt issuance costs	(5,051)		(5,051)
Amortization and extinguishment of discount and debt issuance costs (non-cash interest expense)	49,811		34,143
Net carrying amount	$	67,878	$	182,292
Equity component:
Conversion feature	$	46,800	$	46,800
Reacquisition of conversion option from repurchase of notes, net of tax	(764)		—
Allocated debt issuance costs	(1,543)		(1,543)
Deferred taxes	(18,815)		(18,815)
Net carrying amount	$	25,678	$	26,442

Prior to January 15, 2021, the Convertible Notes were convertible only under certain circumstances including upon the occurrence of specified corporate events. The holders did not convert any of the Convertible Notes prior to January 15, 2021. On or after January 15, 2021 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances.

The Convertible Notes are convertible at an initial conversion rate of 33.0579 shares of the Company’s common stock per $1,000 principal amount of the Convertible Notes, which is equivalent to an initial conversion price of approximately $30.25. The conversion rate will be subject to adjustment for some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date, the Company is required to increase, in certain circumstances, the conversion rate for a holder who elects to convert their Convertible Notes in connection with such a corporate event including customary conversion rate adjustments in connection with a “make-whole fundamental change” described in the indenture. Upon conversion, and at the Company’s election, the Company may satisfy its conversion obligation with cash, shares of its common stock or a combination thereof. As of December 31, 2020, the conversion provisions of the Convertible Notes have not been triggered and none of the notes have been converted.

2017 Senior Notes

On April 20, 2017, the Company issued $500 million in aggregate principal amount of 6.875% Senior Notes due May 1, 2025 (the “2017 Senior Notes”) in a private placement offering. Interest on the 2017 Senior Notes is payable in arrears semi-annually in May and November of each year, beginning in November 2017.

Prior to May 1, 2020, the Company could have redeemed the 2017 Senior Notes under certain conditions described in the agreement. Since May 1, 2020, the Company may redeem the 2017 Senior Notes at specified redemption prices described in the indenture. Upon a change of control, holders of the 2017 Senior Notes may require the Company to repurchase all or part of the 2017 Senior Notes at 101% of the principal amount thereof, plus accrued and unpaid interest to the redemption date.

The 2017 Senior Notes are senior unsecured obligations of the Company and are guaranteed by substantially all of the Company’s existing and future subsidiaries that also guarantee obligations under the Company’s 2020 Credit Agreement, as defined above. In addition, the indenture for the 2017 Senior Notes provides for customary covenants, including events of default and restrictions on the payment of dividends and share repurchases.

Equipment Financing and Mortgages

The Company has certain loans entered into for the purchase of specific property, plant and equipment and secured by the assets purchased. The aggregate balance of equipment financing loans was approximately $36.9 million and $27.7 million at December 31, 2020 and 2019, respectively, with interest rates ranging from 2.74% to 3.89% with equal monthly installment

payments over periods up to 7 years with balloon payments of $12.4 million in 2021 and $6.3 million in 2022. The aggregate balance of mortgage loans was approximately $10.7 million and $11.5 million at December 31, 2020 and 2019, respectively, with interest rates ranging from LIBOR plus 3% to a fixed 3.50% and equal monthly installment payments over periods up to 10 years with balloon payments of $2.9 million in 2021 and $6.8 million in 2023.

The following table presents the future principal payments required under all of the Company’s debt obligations, discussed above:

Year (in thousands)
2021	$	102,228
2022	14,822
2023	14,282
2024	7,498
2025	506,156
Thereafter	402,728
	1,047,714
Less: Unamortized discount and issuance costs	22,249
Total	$	1,025,465

Interest Expense

Interest expense as reported in the Consolidated Statements of Operations consisted of the following:

	For the year ended December 31,
(in thousands)	2020		2019		2018
Cash interest expense:
Interest on 2017 Senior Notes	$	34,375	$	34,375	$	34,375
Interest on Term Loan B	9,028		N/A		N/A
Interest on 2020 Revolver	77		N/A		N/A
Interest on 2017 Credit Facility	5,341		11,990		8,575
Interest on Convertible Notes	4,373		5,750		5,750
Other interest	2,079		2,172		2,747
Cash portion of loss on extinguishment	786		—		—
Total cash interest expense	56,059		54,287		51,447
Non-cash interest expense(a):
Amortization of discount and debt issuance costs on Convertible Notes	8,944		10,811		9,846
Amortization of discount and debt issuance costs on Term Loan B	784		N/A		N/A
Amortization of debt issuance costs on 2020 Revolver	206		N/A		N/A
Amortization of debt issuance costs on 2017 Credit Facility	1,001		1,552		1,439
Amortization of debt issuance costs on 2017 Senior Notes	906		844		787
Non-cash portion of loss on extinguishment	8,312		—		—
Total non-cash interest expense	20,153		13,207		12,072
Total interest expense	$	76,212	$	67,494	$	63,519

_____________________________________________________________________________________________________________

(a)The combination of cash and non-cash interest expense produces effective interest rates that are higher than contractual rates. Accordingly, the effective interest rates for the 2017 Senior Notes, Term Loan B and the Convertible Notes were 7.13%, 6.49% and 9.39%, respectively, for the year ended December 31, 2020.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The Company and certain of its subsidiaries are involved in litigation and other legal proceedings and forms of dispute resolution in the ordinary course of business, including but not limited to disputes over contract payment and/or performance-related issues (such as disagreements regarding delay or a change in the scope of work of a project and/or the price associated with that change) and other matters incidental to the Company’s business. In accordance with ASC 606, the Company makes assessments of these types of matters on a routine basis and, to the extent permitted by ASC 606, estimates and records recovery related to these matters as a form of variable consideration at the most likely amount the Company expects to receive, as discussed further in Note 1(d) and Note 4. In addition, the Company is contingently liable for litigation, performance guarantees and other commitments arising in the ordinary course of business, which are accounted for in accordance with ASC 450, Contingencies. Management reviews these matters regularly and updates or revises its estimates as warranted by subsequent information and developments. These assessments require judgments concerning matters that are inherently uncertain, such as litigation developments and outcomes, the anticipated outcome of negotiations and the estimated cost of resolving disputes. Consequently, these assessments are estimates, and actual amounts may vary from such estimates. In addition, because such matters are typically resolved over long periods of time, the Company’s assets and liabilities may change over time should the circumstances dictate. The description of the legal proceedings listed below include management’s assessment of those proceedings. Management believes that, based on current information and discussions with the Company’s legal counsel, the ultimate resolution of other matters is not expected to have a material effect on the Company’s consolidated financial position, results of operations or cash flows.

A description of the material pending legal proceedings, other than ordinary routine litigation incidental to the business is as follows:

Five Star Electric Matter

In the third quarter of 2015, Five Star Electric Corp. (“Five Star”), a wholly owned subsidiary of the Company that was acquired in 2011, entered into a tolling agreement (which has since expired) related to an ongoing investigation being conducted by the United States Attorney’s Office for the Eastern District of New York (“USAO EDNY”). Five Star has been cooperating with the USAO EDNY since late June 2014, when it was first made aware of the investigation, and has provided information requested by the government related to its use of certain minority-owned, women-owned, small and disadvantaged business enterprises and certain of Five Star’s employee compensation, benefit and tax practices.

As of December 31, 2020, the Company cannot predict the ultimate outcome of the investigation and cannot reasonably estimate the potential loss or range of loss that Five Star or the Company may incur or the impact of the results of the investigation on Five Star or the Company.

Alaskan Way Viaduct (SR 99) Matter

In January 2011, Seattle Tunnel Partners (“STP”), a joint venture between Dragados USA, Inc. and the Company, entered into a design-build contract with the Washington State Department of Transportation (“WSDOT”) for the construction of a large-diameter bored tunnel in downtown Seattle, King County, Washington to replace the Alaskan Way Viaduct, also known as State Route 99. The Company has a 45% interest in STP.

The construction of the large-diameter bored tunnel required the use of a tunnel boring machine (“TBM”). In December 2013, the TBM struck a steel pipe, installed by WSDOT as a well casing for an exploratory well. The TBM was significantly damaged and was required to be repaired. STP has asserted that the steel pipe casing was a differing site condition that WSDOT failed to properly disclose. The Disputes Review Board mandated by the contract to hear disputes issued a decision finding the steel casing was a Type I (material) differing site condition. WSDOT did not accept that finding.

The TBM was insured under a Builder’s Risk Insurance Policy (the “Policy”) with Great Lakes Reinsurance (UK) PLC and a consortium of other insurers (the “Insurers”). STP submitted the claims to the Insurers and requested interim payments under the Policy. The Insurers refused to pay and denied coverage. In June 2015, STP filed a lawsuit in the King County Superior Court, State of Washington seeking declaratory relief concerning contract interpretation, as well as damages as a result of the Insurers’ breach of their obligations under the terms of the Policy. STP is also asserting extra-contractual and statutory claims against the Insurers. WSDOT is deemed a plaintiff since WSDOT is an insured under the Policy and had filed its own claim for damages. Hitachi Zosen (“Hitachi”), the manufacturer of the TBM, joined the case as a plaintiff for costs incurred to repair the damages to the TBM.

In September 2018, rulings received on pre-trial motions effectively limited potential recovery under the Policy for STP, WSDOT and Hitachi. However, on December 19, 2018, the Court of Appeal granted the Company’s request for a discretionary appeal of those rulings. The appeal is expected to be heard in early 2021. STP submitted damages to the Insurers in the King County lawsuit in the amount of $532 million. STP also sought these damages from WSDOT related to the pipe-strike by the TBM in a related lawsuit in Thurston County (see following paragraph).

In March 2016, WSDOT filed a complaint against STP in Thurston County Superior Court alleging breach of contract, seeking $57.2 million in delay-related damages and seeking declaratory relief concerning contract interpretation. STP filed its answer to WSDOT’s complaint and filed a counterclaim against WSDOT and Hitachi, as the TBM designer, seeking damages of $667 million. On October 3, 2019, STP and Hitachi entered into a settlement agreement which released and dismissed the claims that STP and Hitachi had against each other. The jury trial between STP and WSDOT commenced on October 7, 2019 and concluded on December 13, 2019, with a jury verdict in favor of WSDOT awarding them $57.2 million in damages. Judgment was entered on January 10, 2020, and a notice of appeal was filed by STP on January 17, 2020. The appeal is expected to be heard in late 2021.

The Company recorded the impact of the jury verdict during the fourth quarter of 2019, resulting in a pre-tax charge of $166.8 million. The charge includes a pre-tax accrual of $25.7 million (which is the Company’s 45% proportionate share of the $57.2 million in damages awarded by the jury to WSDOT). Payment of damages will only be made if the adverse verdict is upheld on appeal, as the payment is secured by a bond for the course of the appeal. Other than the possible future payment in cash of $25.7 million in damages, the charge was for non-cash write-downs primarily related to the costs and estimated earnings in excess of billings and receivables that the Company previously recorded to reflect its expected recovery in this case.

With respect to STP’s direct and indirect claims against the Insurers, management has included in receivables an estimate of the total anticipated recovery concluded to be probable.

George Washington Bridge Bus Station Matter

In August 2013, Tutor Perini Building Corp. (“TPBC”) entered into a contract with the George Washington Bridge Bus Station Development Venture, LLC (the “Developer”) to renovate the George Washington Bridge Bus Station, a mixed-use facility owned by the Port Authority of New York and New Jersey (the “Port Authority”) that serves as a transit facility and retail space. The $100 million project experienced significant design errors and associated delays, resulting in damages to TPBC and its subcontractors, including WDF and Five Star, wholly owned subsidiaries of the Company. The project reached substantial completion on May 16, 2017.

On February 26, 2015, the Developer filed a demand for arbitration, subsequently amended, seeking $30 million in alleged damages and declaratory relief that TPBC’s requests for additional compensation are invalid due to lack of notice. TPBC denied the Developer’s claims and filed a counterclaim in March 2018. TPBC seeks in excess of $113 million in the arbitration, which includes unpaid contract balance claims, the return of $29 million retained by the Developer in alleged damages, as well as extra work claims, pass-through claims and delay claims.

Hearings on the merits commenced on September 24, 2018 before the arbitration panel. On June 4, 2019, the arbitration panel, as confirmed by the U.S. District Court in the Southern District of New York, issued a writ of attachment for $23 million of the $29 million discussed above. On October 7, 2019, the Developer filed for bankruptcy protection in the Southern District of New York under Chapter 11 of the Bankruptcy Code. The filing for bankruptcy stayed the pending arbitration proceedings. TPBC appeared in the bankruptcy proceedings on October 8, 2019 and filed a Proof of Claim in the amount of $113 million on December 13, 2019.

On June 5, 2020, the Developer, secured lenders and the Port Authority announced that they had reached a settlement of their disputes. As part of the settlement, the Port Authority waived the enforcement of its right to seek a “cure” pursuant to its lease agreement with the Developer which requires construction costs be paid prior to any sale of the leasehold, the sole asset in the Developer’s bankruptcy estate to be distributed in this bankruptcy. On July 14, 2020, the bankruptcy court conducted a hearing to determine (1) whether to approve the settlement agreement between the Developer, secured lenders and the Port Authority; and (2) whether TPBC can assert third-party beneficiary rights to the lease agreement and require that prior to the sale of the leasehold, any outstanding costs owed to contractors for the cost of building the project must be paid pursuant to the lease agreement’s “cure” provisions. On August 12, 2020, the bankruptcy court approved the settlement and denied TPBC’s third-party beneficiary rights under the lease agreement. On August 20, 2020, TPBC filed an appeal with the U.S. District Court for the Southern District of New York seeking to challenge the denial of its third-party beneficiary rights under the lease agreement’s “cure” provisions to avoid being subordinate to the claims of the secured lenders in the bankruptcy proceedings.

Separately, on July 2, 2018, TPBC filed a lawsuit against the Port Authority, as owner of the project, seeking the same $113 million in damages pursuant to the lease agreement between the Port Authority and the Developer. On August 20, 2018, the Port Authority filed a motion to dismiss all causes of action, which was denied by the court on July 1, 2019. The Port Authority appealed this decision on July 15, 2019. On February 18, 2021, the Appellate Division affirmed in part and reversed in part the trial court's denial of the Port Authority's motion to dismiss TPBC’s causes of action.

On January 27, 2020, TPBC filed separate litigation in the U.S. District Court for the Southern District of New York in which TPBC asserted related claims against individual owners of the Developer for their wrongful conversion of project funds and against certain lenders that received interest payments from project funds and other amounts earmarked to pay the contractors. On June 1, 2020, the defendants filed motions to dismiss. On December 29, 2020, the District Court ordered that limited discovery take place before it decides the merits of the motions to dismiss.

As of December 31, 2020, the Company has concluded that the potential for a material adverse financial impact due to the Developer’s claims is remote. With respect to TPBC’s claims against the Developer, its owners, certain lenders and the Port Authority, management has made an estimate of the total anticipated recovery on this project, and such estimate is included in revenue recorded to date.

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Lease

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Leases

Leases

The Company leases certain office space, construction and office equipment, vehicles and temporary housing generally under non-cancelable operating leases. Leases with an initial term of one year or less are not recorded on the balance sheet, and the Company generally recognizes lease expense for these leases on a straight-line basis over the lease term. As of December 31, 2020, the Company’s operating leases have remaining lease terms ranging from less than one year to 18 years, some of which include options to renew the leases. The exercise of lease renewal options is generally at the Company’s sole discretion. The Company’s leases do not contain any material residual value guarantees or material restrictive covenants.

The Company determines if an arrangement is a lease at inception. Operating lease ROU assets are included in other assets, while current and long-term operating lease liabilities are included in accrued expenses and other current liabilities, and other long-term liabilities, respectively, on the Consolidated Balance Sheet as of December 31, 2020. ROU 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. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The present value of future lease payments are discounted using either the implicit rate in the lease, if known, or the Company’s incremental borrowing rate for the specific lease as of the lease commencement date. The ROU asset is also adjusted for any prepayments made or incentives received. The lease terms include options to extend or terminate the lease only to the extent it is reasonably certain any of those options will be exercised. Lease expense is recognized on a straight-line basis over the lease term. The Company accounts for lease components (e.g., fixed payments) separate from the non-lease components (e.g., common-area maintenance costs). The Company does not have any material financing leases.

The following table presents components of lease expense for the years ended December 31, 2020 and 2019:

	For the year ended December 31,
(in thousands)	2020		2019
Operating lease expense	$	14,547	$	15,854
Short-term lease expense(a)	87,969		72,562
	102,516		88,416
Less: Sublease income	1,026		1,077
Total lease expense	$	101,490	$	87,339

(a)Short-term lease expense includes all leases with lease terms ranging from less than one month to one year. Short-term leases include, among other things, construction equipment rented on an as-needed basis as well as temporary housing.

The following table presents supplemental balance sheet information related to operating leases:

		As of December 31,
(dollars in thousands)	Balance Sheet Line Item	2020			2019
Assets
ROU assets	Other assets	$	55,897		$	40,156
Total lease assets		$	55,897		$	40,156
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	7,661		$	11,392
Long-term lease liabilities	Other long-term liabilities	51,336			31,900
Total lease liabilities		$	58,997		$	43,292
Weighted-average remaining lease term		12.5 years			5.0 years
Weighted-average discount rate		9.22		%	5.96		%

The following table presents supplemental cash flow information and non-cash activity related to operating leases:

	As of December 31,
(in thousands)	2020		2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(14,591)	$	(15,658)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	29,244	$	9,784

The following table presents maturities of operating lease liabilities on an undiscounted basis as of December 31, 2020:

Year (in thousands)	Operating Leases
2021	$	12,512
2022	10,528
2023	7,723
2024	6,141
2025	5,354
Thereafter	65,633
Total lease payments	107,891
Less: Imputed interest	48,894
Total	$	58,997

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Share-Based Compensation

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Share-Based Compensation

Share-Based CompensationOn April 10, 2018, the Company adopted the Tutor Perini Corporation Omnibus Incentive Plan (the “Current Plan”), which was approved by the Company’s shareholders on May 23, 2018. The Current Plan effected the merger of the Company’s Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan, as amended and restated on October 2, 2014 (the “2014 Plan”) and the Tutor Perini Corporation Incentive Compensation Plan adopted on April 3, 2017 (the “2017 Plan,” together with the 2014 Plan and the Current Plan, the “Plans”). The Current Plan provides for various types of share-based grants, including restricted and unrestricted stock units and stock options. Restricted and unrestricted stock units give the holder the right to exchange their stock units for shares of the Company’s common stock on a one-for-one basis. Stock options give the holder the right to purchase shares of the Company’s common stock subsequent to the vesting date at a defined exercise price. A stock option exercise price must be equal to or greater than the fair value of the Company’s common stock on the date of the award. Restricted stock units and stock options are usually subject to certain service and performance conditions as well as other restrictions. The term for stock options is limited to 10 years from the award date. As of December 31, 2020, there were 1,539,172 shares of common stock available for grant under the Company’s Current Plan. As of December 31, 2020, the Plans had an aggregate of 3,310,265 of restricted stock units and stock options from outstanding, historical awards that either have not vested or have vested but have not been exercised. Any awards that were granted under the 2014 Plan or the 2017 Plan that are forfeited, cancelled or held back for net settlement will become available to be issued under the Current Plan.

The terms of the Plans give the Company the right to settle the vesting of share-based grants in cash or shares.

Many of the awards issued under the Plans contain separate tranches, each for a separate performance period and each with a performance target to be established subsequent to the award date; accordingly, the tranches are accounted for under ASC 718, Stock Compensation (“ASC 718”) as separate grants, with the grant date being the date the performance targets for a given tranche are established and communicated to the grantee. Similarly, for these awards, compliance with the requirements of the Plans is also based on the number of units granted in a given year, as determined by ASC 718, rather than the number of units awarded in a given year.

The following table summarizes restricted stock unit and stock option activity:

	Restricted Stock Units			Stock Options
	Number	Weighted- Average Grant Date Fair Value Per Share		Number	Weighted- Average Exercise/ (Strike) Price Per Share
Outstanding as of December 31, 2017	1,397,984	$	30.11	2,554,034	$	20.45
Granted	699,000	24.21		664,000	23.20
Expired or cancelled	(240,289)	32.76		(274,990)	22.82
Vested/exercised	(387,695)	28.67		—	—
Outstanding as of December 31, 2018	1,469,000	$	27.27	2,943,044	$	20.89
Granted	530,000	20.23		220,000	19.66
Expired or cancelled	(104,029)	28.98		(884,029)	21.03
Vested/exercised	(179,971)	25.39		—	—
Outstanding as of December 31, 2019	1,715,000	$	25.19	2,279,015	$	20.62
Granted	245,000	20.67		165,000	19.24
Expired or cancelled	(403,750)	25.52		(168,750)	25.87
Vested/exercised	(521,250)	29.44		—	—
Outstanding as of December 31, 2020	1,035,000	$	21.85	2,275,265	$	20.13

Included in the above table are certain restricted stock unit grants which are classified as liabilities in accordance with ASC 718 because they contain a guaranteed minimum payout. These awards may be performance-based or time-based and may be settled in shares of the Company's stock, cash or a combination thereof, at the Company's discretion. As of December 31, 2020 and 2019, there were 270,000 and 390,000 restricted stock units with guaranteed minimum payouts outstanding, with weighted-average grant date fair values per share of $27.80 and $27.89, respectively. The Company recognized liabilities for these awards totaling approximately $2.4 million and $2.9 million as of December 31, 2020 and 2019, respectively. During 2020, the Company paid approximately $0.3 million to settle these awards, and there were no cash settlements in 2019 or 2018.

The following table summarizes unrestricted stock units, which are generally issued to the non-employee members of the Company’s Board of Directors as part of their annual retainer fees:

	Unrestricted Stock Units
Year	Number	Weighted-Average Grant Date Fair Value Per Share
2018	115,420	$	21.26
2019	98,591	15.72
2020	194,177	8.60

Unrestricted stock units vest immediately upon grant and are converted to shares of the Company’s stock on a one-for-one basis. The fair value of unrestricted stock units issued during 2020, 2019 and 2018 was approximately $1.7 million, $1.5 million and $2.5 million, respectively.

The fair value of restricted stock units that vested during 2020, 2019 and 2018 was approximately $4.1 million, $3.1 million and $7.9 million, respectively. As of December 31, 2020, the balance of unamortized restricted stock and stock option expense was $9.0 million and $2.3 million, respectively, which is expected to be recognized over weighted-average periods of 2.0 years for restricted stock units and 2.0 years for stock options.

The 2,275,265 outstanding stock options as of December 31, 2020 had an intrinsic value of $0.9 million and a weighted-average remaining contractual life of 4.6 years. Of those outstanding options: (1) 1,715,265 were exercisable with an intrinsic value of $0.9 million, a weighted-average exercise price of $20.43 per share and a weighted-average remaining contractual life of 3.5 years; (2) 560,000 have not vested and have no intrinsic value, a weighted-average exercise price of $19.21 per share and a weighted-average remaining contractual life of 8.1 years. The 560,000 unvested stock options include 328,125 with time-based or market-based vesting conditions that are expected to vest, as well as 231,875 with market-based vesting conditions that are not expected to vest.

The fair value of restricted and unrestricted stock units is based on the closing price of the Company’s common stock on the New York Stock Exchange on the date of the grant and the fair value of stock options is based on the Black-Scholes model. Certain performance-based awards contain market condition components tied to the Company’s total shareholder return in relation to its peer companies, as calculated over a multi-year performance period (“TSR awards”). The fair value of the TSR awards is determined using a Monte Carlo simulation model. Significant assumptions used in this simulation model include the Company’s expected volatility, a risk-free rate based on U.S. Treasury yield curve rates with maturities consistent with the performance period, and the volatilities for each of the Company’s peers. The ultimate payout on TSR awards is determined at the end of the performance period and will vary based on actual total shareholder return performance results. Compensation expense related to the TSR awards is recognized regardless of whether the market condition is satisfied, provided that the requisite service period has been completed.

The fair value on the grant date and the significant assumptions used in the Black-Scholes option-pricing model are as follows:

	Year Ended December 31,
	2020			2019			2018
Total stock options granted	165,000			220,000			664,000
Weighted-average grant date fair value	$	7.67		$	7.59		$	11.09
Weighted-average assumptions:
Risk-free rate	1.2		%	2.1		%	2.6		%
Expected life of options(a)	6.3 years			6.1 years			5.8 years
Expected volatility(b)	60.7		%	39.4		%	42.2		%
Expected quarterly dividends	$	—		$	—		$	—

_____________________________________________________________________________________________________________

(a)Calculated using the simplified method due to the terms of the stock options and the limited pool of grantees.

(b)Calculated using historical volatility of the Company’s common stock over periods commensurate with the expected life of the option.

For the respective years ended December 31, 2020, 2019 and 2018, the Company recognized, as part of general and administrative expenses, costs for share-based payment arrangements for employees of $10.2 million, $17.5 million and $21.1 million. Additionally for the same periods, the Company recognized as part of general and administrative expenses costs for share-based awards to non-employee directors of $1.6 million, $1.6 million and $1.7 million, respectively. The aggregate tax benefits for these awards were approximately $1.3 million, $2.9 million and $3.8 million, for the respective periods.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

Defined Benefit Pension Plan

The Company has a defined benefit pension plan that covers certain of its executive, professional, administrative and clerical employees, subject to certain specified service requirements. The pension plan is noncontributory and benefits are based on an employee’s years of service and “final average earnings,” as defined by the pension plan. The pension plan provides reduced benefits for early retirement and takes into account offsets for social security benefits. The Company also has an unfunded supplemental retirement plan (“Benefit Equalization Plan”) for certain employees whose benefits under the defined benefit pension plan were reduced because of compensation limitations under federal tax laws. Effective June 1, 2004, all benefit accruals under the Company’s pension plan and Benefit Equalization Plan were frozen; however, the current vested benefit was preserved. Pension disclosure as presented below includes aggregated amounts for both of the Company’s plans, except where otherwise indicated.

The Company historically has used the date of its year-end as its measurement date to determine the funded status of the pension plan.

The long-term investment goals of the Company’s pension plan are to manage the assets in accordance with the legal requirements of all applicable laws; produce investment returns which maximize return within reasonable and prudent levels of risks; and achieve a fully funded status with regard to current pension liabilities. Some risk must be assumed in order to achieve the investment goals. Investments with the ability to withstand short and intermediate term variability are considered and some interim fluctuations in market value and rates of return are tolerated in order to achieve the pension plan’s longer-term objectives.

The pension plan’s assets are managed by a third-party investment manager. The Company monitors investment performance and risk on an ongoing basis.

The following table sets forth a summary of net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
(in thousands)	2020			2019			2018
Interest cost	$	3,032		$	3,801		$	3,496
Service cost	925			900			875
Expected return on plan assets	(4,022)			(4,170)			(4,302)
Recognized net actuarial losses	2,407			1,933			2,067
Net periodic benefit cost	$	2,342		$	2,464		$	2,136
Actuarial assumptions used to determine net cost:
Discount rate	3.07		%	4.12		%	3.45		%
Expected return on assets	5.75		%	5.75		%	6.00		%
Rate of increase in compensation	N/A			N/A			N/A

The target asset allocation for the Company’s pension plan by asset category for 2021 and the actual asset allocation as of December 31, 2020 and 2019 by asset category are as follows:

	Percentage of Plan Assets as of December 31,
	Target Allocation 2021
			Actual Allocation
Asset Category			2020		2019
Cash	5	%	5	%	4	%
Equity funds:
Domestic	35		34		47
International	15		17		18
Fixed income funds	45		44		31
Total	100	%	100	%	100	%

The Company expects to contribute approximately $4.0 million to its defined benefit pension plan in 2021.

Future benefit payments under the plans are estimated as follows:

(in thousands)
Year ended December 31,
2021	$	6,800
2022	6,746
2023	6,657
2024	6,617
2025	6,526
2026-2030	30,704
Total	$	64,050

The following tables provide a reconciliation of the changes in the fair value of plan assets and plan benefit obligations during 2020 and 2019, and a summary of the funded status as of December 31, 2020 and 2019:

	Year Ended December 31,
(in thousands)	2020		2019
Change in Fair Value of Plan Assets
Balance at beginning of year	$	73,357	$	63,109
Actual return on plan assets	899		12,123
Company contribution	4,408		4,793
Benefit payments	(6,724)		(6,668)
Balance at end of year	$	71,940	$	73,357

	Year Ended December 31,
(in thousands)	2020		2019
Change in Benefit Obligations
Balance at beginning of year	$	102,607	$	95,869
Interest cost	3,032		3,801
Service cost	925		900
Assumption change loss	7,902		8,373
Actuarial loss	81		332
Benefit payments	(6,723)		(6,668)
Balance at end of year	$	107,824	$	102,607

	As of December 31,
(in thousands)	2020		2019
Funded status	$	(35,884)	$	(29,250)
Net unfunded amounts recognized in Consolidated Balance Sheets consist of:
Current liabilities	$	(293)	$	(279)
Long-term liabilities	(35,591)		(28,971)
Total net unfunded amount recognized in Consolidated Balance Sheets	$	(35,884)	$	(29,250)

Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive loss consist of net actuarial losses before income taxes of $65.2 million and $56.5 million as of December 31, 2020 and 2019, respectively.

The discount rate used in determining the accumulated post-retirement benefit obligation was 2.2% as of December 31, 2020 and 3.1% as of December 31, 2019. The discount rate used for the accumulated post-retirement obligation was derived using a blend of U.S. Treasury and high-quality corporate bond discount rates.

The expected long-term rate of return on assets assumption was 5.8% for both 2020 and 2019. The expected long-term rate of return on assets assumption was developed considering forward looking capital market assumptions and historical return expectations for each asset class assuming the plans’ target asset allocation and full availability of invested assets.

Closely held fund strategies seek to capitalize on inefficiencies identified across different asset classes or markets and include long-short equity and long equity, event-driven, multi-strategy and distressed credit.

Plan assets were measured at fair value. Registered investment companies are public investment vehicles valued using the Net Asset Value (“NAV”) of shares held by the pension plan at year-end. Equity and fixed income funds are valued based on quoted market prices in active markets. Closely held funds held by the pension plan, which are only available through private offerings, do not have readily determinable fair values. Estimates of fair value of these funds were determined using the information provided by the fund managers and are generally based on the NAV per share or its equivalent.

The following table sets forth the pension plan assets at fair value in accordance with the fair value hierarchy described in Note 12:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	1,582	$	—	$	—	$	1,582	$	2,867	$	—	$	—	$	2,867
Fixed income funds	2,000		3,086		—		5,086		—		2,861		—		2,861
Mutual funds	54,671		—		—		54,671		54,085		—		—		54,085
	$	58,253	$	3,086	$	—	$	61,339	$	56,952	$	2,861	$	—	$	59,813
Closely held funds(a)
Equity partnerships							3,700								3,660
Hedge fund investments							6,901								9,884
Total closely held funds(a)							10,601								13,544
Total	$	58,253	$	3,086	$	—	$	71,940	$	56,952	$	2,861	$	—	$	73,357

_____________________________________________________________________________________________________________

(a)Closely held funds in private investment were comprised of a combination of Level 1, 2 and 3 investments, but were not categorized in the fair value hierarchy because they were measured at NAV using the practical expedient under ASC 820, Fair Value Measurement (“ASC 820”).

As of December 31, 2020 and 2019, pension plan assets included approximately $10.6 million and $13.5 million, respectively, of investments in hedge funds and equity partnerships which do not have readily determinable fair values. The underlying holdings of the funds were comprised of a combination of assets for which the estimate of fair value is determined using information provided by fund managers.

The plans have benefit obligations in excess of the fair value of each plan’s assets as follows:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Pension Plan		Benefit Equalization Plan		Total		Pension Plan		Benefit Equalization Plan		Total
Projected benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Accumulated benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Fair value of plans' assets	71,940		—		71,940		73,357		—		73,357
Projected benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250
Accumulated benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250

Section 401(k) Plan

The Company has a contributory Section 401(k) plan which covers its executive, professional, administrative and clerical employees, subject to certain specified service requirements. The cost recognized by the Company for its 401(k) plan was $4.3 million in 2020, $4.1 million in 2019 and $4.2 million in 2018. The Company’s contribution is based on a non-discretionary match of employees’ contributions, as defined by the plan.

Multiemployer Plans

In addition to the Company’s defined benefit pension and contribution plans discussed above, the Company participates in multiemployer pension plans for its union construction employees. Contributions are based on the hours worked by employees covered under various collective bargaining agreements. Under the Employee Retirement Income Security Act, a contributor to a multiemployer plan is only liable for its proportionate share of a plan’s unfunded vested liability upon termination, or withdrawal from a plan. The Company currently has no intention of withdrawing from any of the multiemployer pension plans in which it participates and, therefore, has not recognized a liability for its proportionate share of any unfunded vested liabilities associated with these plans.

The following table summarizes key information for the plans that the Company made significant contributions to during the three years ended December 31, 2020:

Pension Protections Act Zone Status

FIP/RP Status Pending Or Implemented

Company Contributions (amounts in millions)

Expiration Date of Collective Bargaining Agreement

Pension Fund

EIN/Pension Plan Number

2020

2019

2020(b)

2019(b)

2018

Surcharge Imposed

The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund

13-6123601/001

Green

Green

N/A

$

10.1

$

9.3

(a)

$

12.2

(a)

No

4/13/2022

Excavators Union Local 731 Pension Fund

13-1809825/002

Green

Green

N/A

4.8

5.1

4.1

No

4/30/2022

Carpenters Pension Trust Fund for Northern California

94-6050970

Red

Red

Implemented

4.6

4.0

4.9

No

6/30/2023

Northern California Electrical Workers Pension Plan

94-6062674

Green

Green

N/A

3.5

3.0

4.1

No

5/31/2022

_____________________________________________________________________________________________________________

(a)These amounts exceeded 5% of the respective total plan contributions.

(b)The Company's contributions as a percentage of total plan contributions were not available for the 2020 and 2019 plan years for any of the above pension funds, excluding The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund, Excavators Union Local 731 Pension Fund and Northern California Electrical Workers Pension Plan for the 2019 plan year.

In addition to the individually significant plans described above, the Company also contributed approximately $46.8 million in 2020, $36.5 million in 2019 and $36.6 million in 2018 to other multiemployer pension plans. Funding for these payments is principally provided for in the contracts with our customers.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The fair value hierarchy established by ASC 820 prioritizes the use of inputs used in valuation techniques into the following three levels:

•Level 1 inputs are observable quoted prices in active markets for identical assets or liabilities

•Level 2 inputs are observable, either directly or indirectly, but are not Level 1 inputs

•Level 3 inputs are unobservable

The following fair value hierarchy table presents the Company’s assets that are measured at fair value on a recurring basis as of December 31, 2020 and 2019:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents(a)	$	374,289	$	—	$	—	$	374,289	$	193,685	$	—	$	—	$	193,685
Restricted cash(a)	77,563		—		—		77,563		8,416		—		—		8,416
Restricted investments(b)	—		78,912		—		78,912		—		70,974		—		70,974
Investments in lieu of retainage(c)	92,609		1,300		—		93,909		89,572		1,219		—		90,791
Total	$	544,461	$	80,212	$	—	$	624,673	$	291,673	$	72,193	$	—	$	363,866

_____________________________________________________________________________________________________________

(a)Includes money market funds and short-term investments with maturity dates of three months or less when acquired.

(b)Restricted investments, as of December 31, 2020, consist of investments in U.S. government agency securities of $40.5 million, corporate debt securities of $37.5 million and corporate certificates of deposits of $0.9 million, all with maturities of up to five years, and are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets and are therefore classified as Level 2 assets. As of December 31, 2019, restricted investments consisted of investments in corporate debt securities of $35.8 million and U.S. government agency securities of $33.8 million and corporate certificates of deposits of $1.4 million, all with maturities of up to five years. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

(c)Investments in lieu of retainage are included in retainage receivable and as of December 31, 2020 are comprised of money market funds of $92.6 million and municipal bonds of $1.3 million. The fair values of the money market funds are measured using quoted market prices; therefore, they are classified as Level 1 assets. The fair values of municipal bonds are measured using readily available pricing sources for comparable instruments; therefore, they are classified as Level 2 assets. As of December 31, 2019, investments in lieu of retainage consisted of money market funds of $89.6 million and

municipal bonds of $1.2 million. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

The carrying values of receivables, payables and other amounts arising out of normal contract activities, including retainage, which may be settled beyond one year, are estimated to approximate fair value. Of the Company’s long-term debt, the fair value of the 2017 Senior Notes was $495.0 million and $485.0 million as of December 31, 2020 and 2019, respectively. The fair value of the Term Loan B was $425.0 million as of December 31, 2020 and was determined using Level 2 inputs, specifically third-party quoted market prices. The fair value of the Convertible Notes was $69.1 million and $193.4 million as of December 31, 2020 and 2019, respectively. The fair values of the 2017 Senior Notes and Convertible Notes were determined using Level 1 inputs, specifically current observable market prices. The fair value of the Convertible Notes repurchased on the extinguishment date was used in determining the loss on extinguishment. The fair value on the extinguishment date approximated the face value of the notes and was determined using Level 2 inputs. The reported value of the Company’s remaining borrowings approximates fair value as of December 31, 2020 and 2019.

During the year ended December 31, 2019, the Company acquired an additional 25% interest in a Civil segment joint venture. The Company’s 50% ownership interest prior to the acquisition was accounted for under the proportionate consolidation method and had a carrying value of $3.2 million. Through this acquisition, the Company’s interest increased from 50% to 75%, and it obtained a controlling financial interest in the joint venture, thereby requiring consolidation by the Company. The transaction was accounted for as a business combination achieved in stages, and under ASC 805, Business Combinations, the previously held equity interest in the joint venture was remeasured at the acquisition date fair value with the resulting gain of $37.8 million recognized in earnings, which was included in general and administrative expenses in the Company’s Consolidated Statement of Operations. The fair value of the joint venture and the Company’s existing investment therein was determined based on the fair value of the underlying assets and liabilities acquired by applying an income approach that used discounted future estimated cash flows based on projected revenues, expenses and weighted-average cost of capital. The fair value of the assets and liabilities of the joint venture was recognized in the Company’s consolidated financial statements as of the acquisition date with the 25% interest not owned by the Company recorded as a noncontrolling interest. The acquisition resulted in the recording of an intangible asset for construction contract backlog of $75.6 million. The fair values of the other assets acquired and liabilities assumed were not material. Pro forma results of operations for this acquisition of additional interest in the joint venture have not been presented because they are not material to the Company’s results of operations.

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Variable Interest Entities

12 Months Ended

Dec. 31, 2020

Variable Interest Entities [Abstract]

Variable Interest Entities

Variable Interest Entities (VIEs)

The Company may form joint ventures or partnerships with third parties for the execution of projects. In accordance with ASC 810, the Company assesses its partnerships and joint ventures at inception to determine if any meet the qualifications of a VIE. The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity, and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether a joint venture is a VIE.

ASC 810 also requires the Company to determine whether it is the primary beneficiary of the VIE. The Company concludes that it is the primary beneficiary and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the VIE and (b) the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining if the Company is the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

As of December 31, 2020, the Company had unconsolidated VIE-related current assets and liabilities of $0.6 million and $0.5 million, respectively, included in the Company’s Consolidated Balance Sheet. As of December 31, 2019, the Company had unconsolidated VIE-related current assets and liabilities of $1.5 million and $1.4 million, respectively, included in the Company’s Consolidated Balance Sheet. The Company’s maximum exposure to loss as a result of its investments in unconsolidated VIEs is typically limited to the aggregate of the carrying value of the investment and future funding commitments. There were no future funding requirements for the unconsolidated VIEs as of December 31, 2020.

As of December 31, 2020, the Company’s Consolidated Balance Sheet included current and noncurrent assets of $405.7 million and $14.2 million, respectively, as well as current liabilities of $514.9 million related to the operations of its consolidated VIEs. As of December 31, 2019, the Company’s Consolidated Balance Sheet included current and noncurrent assets of $365.0 million and $52.0 million, respectively, as well as current liabilities of $556.1 million related to the operations of its consolidated VIEs.

Below is a discussion of some of the Company’s more significant or unique VIEs.

The Company established a joint venture to construct the Purple Line Extension Section 2 (Tunnels and Stations) and Section 3 (Stations) mass-transit projects in Los Angeles, California with a combined value of approximately $2.8 billion. The Company has a 75% interest in the joint venture with the remaining 25% held by O&G Industries, Inc. (“O&G”). The joint venture was initially financed with contributions from the partners and, per the terms of the joint venture agreement, the partners may be required to provide additional capital contributions in the future. The Company has determined that this joint venture is a VIE for which the Company is the primary beneficiary.

The Company also established a joint venture with Parsons Corporation (“Parsons”) to construct the Newark Liberty International Airport Terminal One project, a $1.4 billion transportation infrastructure project in Newark, New Jersey. The Company has an 80% interest in the joint venture with the remaining 20% held by Parsons. The joint venture was initially financed with contributions from the partners and, per the terms of the joint venture agreement, the partners may be required to provide additional capital contributions in the future. The Company has determined that this joint venture is a VIE for which the Company is the primary beneficiary.

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Business Segments

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Business Segments

Business Segments

The Company offers general contracting, pre-construction planning and comprehensive project management services, including planning and scheduling of manpower, equipment, materials and subcontractors required for the timely completion of a project in accordance with the terms and specifications contained in a construction contract. The Company also offers self-performed construction services: site work, concrete forming and placement, steel erection, electrical, mechanical, plumbing, and HVAC (heating, ventilation and air conditioning). As described below, the Company’s business is conducted through three segments: Civil, Building and Specialty Contractors. These segments are determined based on how the Company’s Chairman and Chief Executive Officer (chief operating decision maker) aggregates business units when evaluating performance and allocating resources.

The Civil segment specializes in public works construction and the replacement and reconstruction of infrastructure. The contracting services provided by the Civil segment include construction and rehabilitation of highways, bridges, tunnels, mass-transit systems, military defense facilities, and water management and wastewater treatment facilities.

The Building segment has significant experience providing services for private and public works customers in a number of specialized building markets, including: hospitality and gaming, transportation, health care, commercial offices, government facilities, sports and entertainment, education, correctional facilities, biotech, pharmaceutical, industrial and high-tech.

The Specialty Contractors segment specializes in electrical, mechanical, plumbing, HVAC, fire protection systems and pneumatically placed concrete for a full range of civil and building construction projects in the industrial, commercial, hospitality and gaming, and mass-transit end markets. This segment provides the Company with unique strengths and capabilities that allow the Company to position itself as a full-service contractor with greater control over scheduled work, project delivery, and cost and risk management.

To the extent that a contract is co-managed and co-executed among segments, the Company allocates the share of revenues and costs of the contract to each segment to reflect the shared responsibilities in the management and execution of the project.

The following tables set forth certain reportable segment information relating to the Company’s operations for the years ended December 31, 2020, 2019 and 2018:

	Reportable Segments
(in thousands)	Civil		Building		Specialty Contractors		Total		Corporate			Consolidated Total
Year ended December 31, 2020
Total revenue	$	2,565,210	$	2,114,459	$	1,135,018	$	5,814,687	$	—		$	5,814,687
Elimination of intersegment revenue	(365,311)		(129,818)		(795)		(495,924)		—			(495,924)
Revenue from external customers	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763	$	—		$	5,318,763
Income (loss) from construction operations(a)	$	245,835	$	53,158	$	17,203	$	316,196	$	(53,852)	(b)	$	262,344
Capital expenditures	$	51,044	$	878	$	1,917	$	53,839	$	942		$	54,781
Depreciation and amortization(c)	$	90,250	$	1,703	$	3,983	$	95,936	$	11,098		$	107,034
Year ended December 31, 2019
Total revenue	$	2,054,097	$	1,764,753	$	929,738	$	4,748,588	$	—		$	4,748,588
Elimination of intersegment revenue	(274,745)		(22,713)		(298)		(297,756)		—			(297,756)
Revenue from external customers	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832	$	—		$	4,450,832
Income (loss) from construction operations(d)	$	(150,837)	$	23,655	$	(172,637)	$	(299,819)	$	(65,188)	(b)	$	(365,007)
Capital expenditures	$	82,156	$	518	$	688	$	83,362	$	834		$	84,196
Depreciation and amortization(c)	$	47,905	$	1,934	$	4,136	$	53,975	$	11,069		$	65,044
Year ended December 31, 2018
Total revenue	$	1,810,232	$	1,866,902	$	1,006,870	$	4,684,004	$	—		$	4,684,004
Elimination of intersegment revenue	(224,139)		(5,203)		—		(229,342)		—			(229,342)
Revenue from external customers	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662	$	—		$	4,454,662
Income (loss) from construction operations(e)	$	168,256	$	43,939	$	43,430	$	255,625	$	(63,749)	(b)	$	191,876
Capital expenditures	$	73,866	$	1,655	$	777	$	76,298	$	771		$	77,069
Depreciation and amortization(c)	$	29,685	$	1,956	$	4,358	$	35,999	$	11,268		$	47,267

_____________________________________________________________________________________________________________

(a)During the year ended December 31, 2020, the Company recorded a charge of $15.2 million in income (loss) from construction operations (an after-tax impact of $11.0 million, or $0.22 per diluted share) due to an unfavorable legal ruling pertaining to a mechanical project in California in the Specialty Contractors segment, as well as a charge of $13.2 million (an after-tax impact of $9.6 million, or $0.19 per diluted share) due to an adverse arbitration ruling pertaining to an electrical project in New York in the Specialty Contractors segment. The Company also recorded a gain of $25.7 million in Specialty Contractors segment general and administrative expenses (an after-tax impact of $18.6 million, or $0.36 per diluted share) as a result of a favorable arbitration decision and subsequent settlement of the related employment dispute.

(b)Consists primarily of corporate general and administrative expenses.

(c)Depreciation and amortization is included in income (loss) from construction operations.

(d)During the year ended December 31, 2019, the Company recorded a non-cash goodwill impairment charge of $379.9 million in income (loss) from construction operations (an after-tax impact of $330.5 million, or $6.58 per diluted share) resulting from an interim impairment test the Company performed as of June 1, 2019. For further information and breakdown of the goodwill impairment charge by segment, see Note 6. In addition, during the year ended December 31, 2019 the Company recorded a charge of $166.8 million in income (loss) from construction operations (an after-tax impact of $119.4 million, or $2.38 per diluted share), which principally impacted the Civil segment, as a result of the adverse jury verdict on the Alaskan Way Viaduct (SR 99) Matter, as discussed in Note 8. Lastly, the Company recognized a one-time gain of $37.8 million (an after-tax impact of $27.1 million, or $0.54 per diluted share) in Civil segment general and administrative expenses related to a remeasurement of its investment in a joint venture (see Note 12).

(e)During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in income (loss) from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.

The above were the only changes in estimates considered material to the Company’s results of operations during the periods presented herein.

Total assets by segment were as follows:

	As of December 31,
(in thousands)	2020		2019
Civil	$	3,141,991	$	2,791,402
Building	1,147,649		995,298
Specialty Contractors	673,891		635,180
Corporate and other(a)	82,086		63,897
Total assets	$	5,045,617	$	4,485,777

_____________________________________________________________________________________________________________

(a)    Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

Geographic Information

Information concerning principal geographic areas is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Revenue:
United States	$	4,953,045	$	4,073,691	$	4,180,206
Foreign and U.S. territories	365,718		377,141		274,456
Total revenue	$	5,318,763	$	4,450,832	$	4,454,662

	As of December 31,
(in thousands)	2020		2019
Assets:
United States	$	4,836,735	$	4,271,722
Foreign and U.S. territories	208,882		214,055
Total assets	$	5,045,617	$	4,485,777

Reconciliation of Segment Information to Consolidated Amounts

A reconciliation of segment results to the consolidated income (loss) before income taxes is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Income (loss) from construction operations	$	262,344	$	(365,007)	$	191,876
Other income (expense)	(11,853)		6,667		4,256
Interest expense	(76,212)		(67,494)		(63,519)
Income (loss) before income taxes	$	174,279	$	(425,834)	$	132,613

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Related Party Transactions

12 Months Ended

Dec. 31, 2020

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

The Company leases, at market rates, certain facilities from an entity owned by Ronald N. Tutor, the Company’s Chairman and Chief Executive Officer. Under these leases, the Company paid $3.2 million in 2020, $3.1 million in 2019 and $3.0 million in 2018, and recognized expense of $3.2 million in each of the three years.

Raymond R. Oneglia, Vice Chairman of O&G, is a director of the Company. The Company occasionally forms construction project joint ventures with O&G. During the three years ended December 31, 2020, the Company had active joint ventures with O&G including two infrastructure projects in the northeastern United States that were completed in 2017 and two mass-transit projects in Los Angeles, California to construct the Purple Line Extension Section 2 (Tunnels and Stations) and Section 3 (Stations), in which the Company’s and O&G’s joint venture interests are 75% and 25%, respectively. O&G may provide equipment and services to these joint ventures on customary trade terms; there were no material payments made by these joint ventures to O&G for services and equipment during the years ended December 31, 2020, 2019 and 2018.

Peter Arkley, Senior Managing Director, Construction Services Group, of Alliant Insurance Services, Inc. (“Alliant”), is a director of the Company. The Company uses Alliant for various insurance-related services. The associated expenses for services provided for the years ended December 31, 2020, 2019 and 2018 were $16.0 million, $18.4 million and $14.7 million, respectively. The Company owed Alliant $2.7 million as of both December 31, 2020 and 2019 for services rendered.

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Unaudited Quarterly Financial Data

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Data

Unaudited Quarterly Financial Data

The following table presents selected unaudited quarterly financial data for each full quarterly period of 2020 and 2019:

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2020
Revenue	$	1,250,729	$	1,276,427	$	1,442,091	$	1,349,516
Gross profit	111,080		117,754		124,915		132,404
Income from construction operations	47,227		57,696		83,021		74,400
Income before income taxes	31,272		40,435		49,360		53,212
Net income	26,138		30,859		49,323		46,017
Net income attributable to Tutor Perini Corporation	17,371		18,709		36,819		35,495
Earnings per common share:
Basic	$	0.35	$	0.37	$	0.72	$	0.70
Diluted	$	0.34	$	0.37	$	0.72	$	0.69

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2019
Revenue	$	958,487	$	1,125,275	$	1,189,345	$	1,177,725
Gross profit (loss)	88,470		100,943		115,063		(62,704)
Income (loss) from construction operations	22,913		(341,717)		47,943		(94,146)
Income (loss) before income taxes	6,910		(358,339)		32,312		(106,717)
Net income (loss)	4,722		(315,439)		26,721		(76,229)
Net income (loss) attributable to Tutor Perini Corporation	(356)		(320,530)		19,313		(86,117)
Earnings (loss) per common share:
Basic	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)
Diluted	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation

(a) Basis of Presentation

The accompanying consolidated financial statements have been prepared in compliance with generally accepted accounting principles in the United States (“GAAP”) as codified in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”). Certain amounts in the notes to the consolidated financial statements of prior years have been reclassified to conform to the current year presentation.

Principles of Consolidation

(b) Principles of Consolidation

The consolidated financial statements include the accounts of Tutor Perini Corporation and its wholly owned subsidiaries (the “Company”). The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with ASC 810, Consolidation (“ASC 810”). If a joint venture is a VIE and the Company is the primary beneficiary, the joint venture is fully consolidated (See Note 13). If a joint venture is not a VIE, it may be consolidated under the voting interest method if the Company holds a controlling financial interest in the joint venture. The Company is considered to hold a controlling financial interest when it is able to exercise control over the joint venture’s operating and financial decisions. For construction joint ventures that do not need to be consolidated, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. Intercompany balances and transactions have been eliminated.

Use of Estimates

(c) Use of Estimates

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect reported amounts. These estimates are based on information available through the date of the issuance of the financial statements; therefore, actual results could differ from those estimates.

Revenues

(d) Revenues

Revenue Recognition

The Company derives revenue from long-term construction contracts with public and private customers primarily in the United States and its territories and in certain other international locations. The Company’s construction contracts are generally each accounted for as a single unit of account (i.e., as a single performance obligation).

Throughout the execution of construction contracts, the Company and its affiliated entities recognize revenue with the continuous transfer of control to the customer. The customer typically controls the asset under construction by either contractual termination clauses or by the Company’s rights to payment for work already performed on the asset under construction that does not have an alternative use for the Company.

Because control transfers over time, revenue is recognized to the extent of progress towards completion of the performance obligations. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services provided. The Company generally uses the cost-to-cost method for its contracts, which measures progress towards completion for each performance obligation based on the ratio of costs incurred to date to the total estimated costs at completion for the respective performance obligation. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Revenue, including estimated fees or profits, is recorded proportionately as costs are incurred. Cost of operations includes labor, materials, subcontractor costs, and other direct and indirect costs, including depreciation and amortization.

Due to the nature of the work required to be performed on many of the Company’s performance obligations, estimating total revenue and cost at completion is complex, subject to many variables and requires significant judgment. Assumptions as to the occurrence of future events and the likelihood and amount of variable consideration, including the impact of change orders, claims, contract disputes and the achievement of contractual performance criteria, and award or other incentive fees are made during the contract performance period. The Company estimates variable consideration at the most likely amount it expects to receive. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal

of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of anticipated performance and all information (historical, current and forecasted) that is reasonably available to management. Back charges to suppliers or subcontractors are recognized as a reduction of cost when it is determined that recovery of such cost is probable and the amounts can be reliably estimated. Disputed back charges are recognized when the same requirements described above for variable consideration have been satisfied.

Changes in Estimates on Construction Contracts

The Company’s estimates of contract revenue and cost are highly detailed and many factors change during a contract performance period that result in a change to contract profitability. These factors include, but are not limited to, differing site conditions; availability of skilled contract labor; performance of major material suppliers and subcontractors; on-going subcontractor negotiations and buyout provisions; unusual weather conditions; changes in the timing of scheduled work; change orders; accuracy of the original bid estimate; changes in estimated labor productivity and costs based on experience to date; achievement of incentive-based income targets; and the expected, or actual, resolution terms for claims. The factors that cause changes in estimates vary depending on the maturation of the project within its lifecycle. For example, in the ramp-up phase, these factors typically consist of revisions in anticipated project costs and during the peak and closeout phases, these factors include the impact of change orders and claims, as well as additional revisions in remaining anticipated project costs. Generally, if the contract is at an early stage of completion, the current period impact is smaller than if the same change in estimate is made to the contract at a later stage of completion. Management evaluates changes in estimates on a contract-by-contract basis and discloses significant changes, if material, in the Notes to Consolidated Financial Statements. The cumulative catch-up method is used to account for revisions in estimates.

Depreciation of Property and Equipment and Amortization of Long-Lived Intangible Assets

(e) Depreciation of Property and Equipment and Amortization of Long-Lived Intangible Assets

Property and equipment and long-lived intangible assets are generally depreciated or amortized on a straight-line basis over their estimated useful lives ranging from three to forty years.

Recoverability of Long-Lived Assets

(f) Recoverability of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever circumstances indicate that the future cash flows generated by the assets might be less than the assets’ net carrying value. In such circumstances, an impairment loss will be recognized by the amount the assets’ net carrying value exceeds their fair value.

Recoverability of Goodwill

(g) Recoverability of Goodwill

The Company tests goodwill for impairment annually as of October 1 for each reporting unit and between annual tests if events occur or circumstances change which suggest that goodwill should be reevaluated. Such events or circumstances include significant changes in legal factors and business climate, recent losses at a reporting unit, and industry trends, among other factors. The Civil, Building and Specialty Contractors segments each represent a reporting unit, and the Civil reporting unit carried the remaining goodwill balance at December 31, 2020 as a result of the $379.9 million impairment loss recognized in 2019. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using a weighted average of an income and a market approach. These approaches utilize various valuation assumptions, and small changes to the assumptions could have a significant impact on the concluded fair value. The income approach is based on estimated present value of future cash flows for each reporting unit carrying a goodwill balance. The market approach is based on assumptions about how market data relates to each reporting unit carrying a goodwill balance. The weighting of these two approaches is based on their individual correlation to the economics of each reporting unit carrying a goodwill balance. The annual quantitative assessment performed in the fourth quarter of 2020 resulted in an estimated fair value that exceeded the net book value of the Civil reporting unit; therefore, no impairment charge was necessary.

Recoverability of Non-Amortizable Trade Names

(h) Recoverability of Non-Amortizable Trade Names

Certain trade names have an estimated indefinite life and are not amortized to earnings, but instead are reviewed for impairment annually, or more often if events occur or circumstances change which suggest that the non-amortizable trade names should be reevaluated. The Company performs its annual quantitative impairment assessment during the fourth quarter of each year using an income approach (relief from royalty method). The assessment performed in the fourth quarter of 2020 resulted in an estimated fair value for the non-amortizable trade names that exceeded their respective net book values; therefore, no impairment charge was necessary.

Income Taxes

(i) Income Taxes

Deferred income tax assets and liabilities are recognized for the effects of temporary differences between the financial statement carrying amounts and the income tax basis of assets and liabilities using tax rates expected to be in effect when such differences reverse. Income tax positions must meet a more-likely-than-not threshold to be recognized. The Company recognizes interest and penalties related to uncertain tax positions as a component of the income tax provision.

Earnings Per Common Share (EPS)

(j) Earnings Per Common Share (EPS)

Basic EPS and diluted EPS are calculated by dividing net income attributable to Tutor Perini Corporation by the following: for basic EPS, the weighted-average number of common shares outstanding during the period; and for diluted EPS, the sum of the weighted-average number of both outstanding common shares and potentially dilutive securities, which for the Company can include restricted stock units, unexercised stock options and the Convertible Notes, as defined in Note 7. In accordance with ASC 260, Earnings Per Share, the settlement of the principal amount of the Convertible Notes has no impact on diluted EPS because the Company has the intent and ability to settle the principal amount in cash. See Note 7 for further discussion of the Convertible Notes. The Company calculates the effect of the potentially dilutive restricted stock units and stock options using the treasury stock method.

	Year Ended December 31,
(in thousands, except per common share data)	2020		2019		2018
Net income (loss) attributable to Tutor Perini Corporation	$	108,394	$	(387,690)	$	83,436
Weighted-average common shares outstanding, basic	50,656		50,220		49,952
Effect of dilutive restricted stock units and stock options	421		—		349
Weighted-average common shares outstanding, diluted	51,077		50,220		50,301
Net income (loss) attributable to Tutor Perini Corporation per common share:
Basic	$	2.14	$	(7.72)	$	1.67
Diluted	$	2.12	$	(7.72)	$	1.66
Anti-dilutive securities not included above	1,862		3,640		2,670

For the year ended December 31, 2019, all outstanding restricted stock units and stock options were excluded from the calculation of weighted-average diluted shares outstanding due to the net loss for the period.

Cash, Cash Equivalents and Restricted Cash

(k) Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets to the amounts shown in the Consolidated Statements of Cash Flows:

	As of December 31,
(in thousands)	2020		2019
Cash and cash equivalents available for general corporate purposes	$	210,841	$	43,760
Joint venture cash and cash equivalents	163,448		149,925
Cash and cash equivalents	374,289		193,685
Restricted cash	77,563		8,416
Total cash, cash equivalents and restricted cash	$	451,852	$	202,101

Cash equivalents include short-term, highly liquid investments with maturities of three months or less when acquired. Cash and cash equivalents consist of amounts available for the Company’s general purposes, the Company’s proportionate share of cash held by the Company’s unconsolidated joint ventures and 100% of amounts held by the Company’s consolidated joint ventures. In both cases, cash held by joint ventures is available only for joint venture-related uses, including future distributions to joint venture partners.

As of December 31, 2020, restricted cash consists primarily of $69.9 million held to repay the outstanding principal balance of Convertible Notes described in more detail in Note 7. Restricted cash also includes amounts held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit.

Restricted Investments

(l) Restricted Investments

The Company has restricted investments primarily held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit. Restricted investments are primarily comprised of investments in U.S. government agency securities and corporate debt securities that are rated A3 or better.

Share-Based Compensation

(m) Share-Based Compensation

The Company’s long-term incentive plans allow the Company to grant share-based compensation awards in a variety of forms, including restricted and unrestricted stock units and stock options. Restricted stock units and stock options generally vest subject to service and/or performance requirements, with related compensation expense equal to the fair value of the award on the date of grant and recognized on a straight-line basis over the requisite period. The Company may grant awards that require liability classification and are remeasured at fair value at the end of each reporting period with the change in fair value recognized as compensation cost.

For share-based awards that have a service requirement, the Company accounts for forfeitures upon occurrence, rather than estimating the probability of forfeiture at the date of grant. Accordingly, the Company recognizes the full grant-date fair value of these awards on a straight-line basis throughout the requisite service period, reversing any expense if, and only if, there is a forfeiture.

For share-based awards that have a performance-based vesting requirement, the Company evaluates the probability of achieving the performance criteria throughout the performance period, and will adjust share-based compensation expense if it estimates that the achievement of the performance criteria is not probable. Certain performance-based awards contain market condition components and are valued on the date of grant using a Monte Carlo simulation model. The fair value of such awards is expensed ratably over the performance period and is not adjusted for actual achievement.

Insurance Liabilities

(n) Insurance Liabilities

The Company typically utilizes third-party insurance coverage subject to varying deductible levels with aggregate caps on losses retained. The Company assumes the risk for the amount of the deductible portion of the losses and liabilities primarily associated with workers’ compensation and general liability coverage. In addition, on certain projects, the Company assumes the risk for the amount of the deductible portion of losses that arise from any subcontractor defaults. Losses are accrued based upon the Company’s estimates of the aggregate liability for claims incurred using historical experience and certain actuarial assumptions followed in the insurance industry. The estimate of insurance liability within the deductible limits includes an estimate of incurred but not reported claims based on data compiled from historical experience.

Other Comprehensive Income (Loss)

(o) Other Comprehensive Income (Loss)

ASC 220, Comprehensive Income, establishes standards for reporting comprehensive income and its components in the consolidated financial statements. The Company reports the change in pension benefit plan assets/liabilities, cumulative foreign currency translation, and change in fair value of investments as components of accumulated other comprehensive income (loss) (“AOCI”).

The components of other comprehensive income (loss) and the related tax effects for the years ended December 31, 2020, 2019 and 2018 were as follows:

	Year Ended December 31,
	2020						2019						2018
(in thousands)	Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount
Other comprehensive income (loss):
Defined benefit pension plan adjustments	$	(8,700)	$	2,439	$	(6,261)	$	1,180	$	(336)	$	844	$	1,079	$	(308)	$	771
Foreign currency translation adjustment	178		101		279		1,867		(530)		1,337		(4,067)		1,122		(2,945)
Unrealized gain (loss) in fair value of investments	2,015		(444)		1,571		1,982		(421)		1,561		(1,005)		227		(778)
Total other comprehensive income (loss)	$	(6,507)	$	2,096	$	(4,411)	$	5,029	$	(1,287)	$	3,742	$	(3,993)	$	1,041	$	(2,952)
Less: Other comprehensive income (loss) attributable to noncontrolling interests(a)	230		—		230		393		—		393		(221)		—		(221)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation	$	(6,737)	$	2,096	$	(4,641)	$	4,636	$	(1,287)	$	3,349	$	(3,772)	$	1,041	$	(2,731)

________________________________________________________________________________________

(a)The only component of other comprehensive income (loss) attributable to noncontrolling interests is foreign currency translation.

The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the years ended December 31, 2020, 2019 and 2018 were as follows:

(in thousands)	Defined Benefit Pension Plan		Foreign Currency Translation		Unrealized Gain (Loss) in Fair Value of Investments		Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance as of December 31, 2017	$	(39,441)	$	(3,591)	$	314	$	(42,718)
Other comprehensive loss before reclassifications	(695)		(2,724)		(835)		(4,254)
Amounts reclassified from AOCI	1,466		—		57		1,523
Balance as of December 31, 2018	$	(38,670)	$	(6,315)	$	(464)	$	(45,449)
Other comprehensive income (loss) before reclassifications	(539)		944		1,621		2,026
Amounts reclassified from AOCI	1,383		—		(60)		1,323
Balance as of December 31, 2019	$	(37,826)	$	(5,371)	$	1,097	$	(42,100)
Other comprehensive income (loss) before reclassifications	(7,993)		49		1,820		(6,124)
Amounts reclassified from AOCI	1,732		—		(249)		1,483
Balance as of December 31, 2020	$	(44,087)	$	(5,322)	$	2,668	$	(46,741)

Recent Accounting Pronouncements

(p) Recent Accounting Pronouncements

In March 2020, the FASB issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). The amendments in ASU 2020-04 provide temporary optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions to ease the potential accounting and financial reporting burden associated with transitioning away from reference rates that are expected to be discontinued, including the London Interbank Offered Rate (“LIBOR”). ASU 2020-04 is effective as of March 12, 2020 through December 31, 2022. The adoption of the new standard has not had and is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance within ASU 2019-04 and ASU 2019-05 (collectively, “ASU 2016-13”). The amendments in ASU 2016-13 replace the incurred loss impairment methodology with the current expected credit loss model, which requires consideration of a broader range of reasonable and supportable information to estimate credit losses. The Company adopted this ASU effective January 1, 2020. The adoption of ASU 2016-13 did not have a material impact on the Company’s financial position, results of operations or cash flows.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), as amended and supplemented by subsequent ASUs (collectively, “ASC 842”). The Company adopted this ASU effective January 1, 2019 using the optional transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. As such, the 2018 comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.

The following recent accounting pronouncements require implementation in future periods.

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). The amendments in ASU 2020-06 simplify accounting for convertible instruments by removing major separation models required under current GAAP. Consequently, more convertible debt instruments will be reported as a single liability instrument with no separate accounting for embedded conversion features. ASU 2020-06 removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception. Also, ASU 2020-06 requires the application of the if-converted method for calculating diluted EPS and the treasury stock method will no longer be available. ASU 2020-06 is effective for interim and annual reporting periods beginning after December 15, 2021, with early adoption permitted. The Company does not expect to early adopt the new standard and does not expect it to have an impact on the Company's financial position, results of operations or cash flows.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”), modifying ASC 740, Income Taxes (“ASC 740”). The amendments in ASU 2019-12, among other things, remove certain exceptions to the general principles in ASC 740 and seek more consistent application by clarifying and amending the existing guidance. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020. The Company is currently evaluating the new standard, which is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Calculations of Basic and Diluted (EPS)

	Year Ended December 31,
(in thousands, except per common share data)	2020		2019		2018
Net income (loss) attributable to Tutor Perini Corporation	$	108,394	$	(387,690)	$	83,436
Weighted-average common shares outstanding, basic	50,656		50,220		49,952
Effect of dilutive restricted stock units and stock options	421		—		349
Weighted-average common shares outstanding, diluted	51,077		50,220		50,301
Net income (loss) attributable to Tutor Perini Corporation per common share:
Basic	$	2.14	$	(7.72)	$	1.67
Diluted	$	2.12	$	(7.72)	$	1.66
Anti-dilutive securities not included above	1,862		3,640		2,670

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets to the amounts shown in the Consolidated Statements of Cash Flows:

	As of December 31,
(in thousands)	2020		2019
Cash and cash equivalents available for general corporate purposes	$	210,841	$	43,760
Joint venture cash and cash equivalents	163,448		149,925
Cash and cash equivalents	374,289		193,685
Restricted cash	77,563		8,416
Total cash, cash equivalents and restricted cash	$	451,852	$	202,101

Tax Effects of Components of Other Comprehensive Income (Loss)

The components of other comprehensive income (loss) and the related tax effects for the years ended December 31, 2020, 2019 and 2018 were as follows:

	Year Ended December 31,
	2020						2019						2018
(in thousands)	Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount
Other comprehensive income (loss):
Defined benefit pension plan adjustments	$	(8,700)	$	2,439	$	(6,261)	$	1,180	$	(336)	$	844	$	1,079	$	(308)	$	771
Foreign currency translation adjustment	178		101		279		1,867		(530)		1,337		(4,067)		1,122		(2,945)
Unrealized gain (loss) in fair value of investments	2,015		(444)		1,571		1,982		(421)		1,561		(1,005)		227		(778)
Total other comprehensive income (loss)	$	(6,507)	$	2,096	$	(4,411)	$	5,029	$	(1,287)	$	3,742	$	(3,993)	$	1,041	$	(2,952)
Less: Other comprehensive income (loss) attributable to noncontrolling interests(a)	230		—		230		393		—		393		(221)		—		(221)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation	$	(6,737)	$	2,096	$	(4,641)	$	4,636	$	(1,287)	$	3,349	$	(3,772)	$	1,041	$	(2,731)

________________________________________________________________________________________

(a)The only component of other comprehensive income (loss) attributable to noncontrolling interests is foreign currency translation.

Changes in AOCI Balances by Component

The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the years ended December 31, 2020, 2019 and 2018 were as follows:

(in thousands)	Defined Benefit Pension Plan		Foreign Currency Translation		Unrealized Gain (Loss) in Fair Value of Investments		Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance as of December 31, 2017	$	(39,441)	$	(3,591)	$	314	$	(42,718)
Other comprehensive loss before reclassifications	(695)		(2,724)		(835)		(4,254)
Amounts reclassified from AOCI	1,466		—		57		1,523
Balance as of December 31, 2018	$	(38,670)	$	(6,315)	$	(464)	$	(45,449)
Other comprehensive income (loss) before reclassifications	(539)		944		1,621		2,026
Amounts reclassified from AOCI	1,383		—		(60)		1,323
Balance as of December 31, 2019	$	(37,826)	$	(5,371)	$	1,097	$	(42,100)
Other comprehensive income (loss) before reclassifications	(7,993)		49		1,820		(6,124)
Amounts reclassified from AOCI	1,732		—		(249)		1,483
Balance as of December 31, 2020	$	(44,087)	$	(5,322)	$	2,668	$	(46,741)

Reclassification out of Accumulated Other Comprehensive Income

The significant items reclassified out of AOCI and the corresponding location and impact on the Consolidated Statements of Operations during the years ended December 31, 2020, 2019 and 2018 are as follows:

	Location in Consolidated	Year Ended December 31,
(in thousands)	Statements of Operations	2020		2019		2018
Component of AOCI:
Defined benefit pension plan adjustments	Other income (expense)	$	2,407	$	1,933	$	2,052
Income tax benefit	Income tax expense (benefit)	(675)		(550)		(586)
Net of tax		$	1,732	$	1,383	$	1,466
Unrealized (gain) loss in fair value of investment adjustments	Other income (expense)	$	(315)	$	(76)	$	72
Income tax expense (benefit)	Income tax expense (benefit)	66		16		(15)
Net of tax		$	(249)	$	(60)	$	57

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Consolidated Statements of Cash Flows (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Changes in Other Components of Working Capital

Below are the changes in other components of working capital, net of balances related to incremental interest acquired in a Civil segment joint venture during 2019 (see Note 12), as shown in the Consolidated Statements of Cash Flows, the supplemental disclosure of cash paid for interest and income taxes and the supplemental disclosure of non-cash investing activities:

	Year Ended December 31,
(in thousands)	2020		2019		2018
(Increase) Decrease in:
Accounts receivable	$	(104,901)	$	(81,983)	$	3,899
Retainage receivable	(85,769)		(78,520)		56,754
Costs and estimated earnings in excess of billings	(113,190)		18,751		(209,537)
Other current assets	(49,468)		(76,146)		15,398
(Decrease) Increase in:
Accounts payable	111,912		53,999		(78,243)
Retainage payable	62,954		35,013		(49,864)
Billings in excess of costs and estimated earnings	(5,168)		245,292		76,703
Accrued expenses and other current liabilities	13,654		14,851		28,046
Changes in other components of working capital	$	(169,976)	$	131,257	$	(156,844)
Cash paid during the year for:
Interest	$	57,038	$	56,137	$	51,063
Income taxes	$	11,204	$	43,374	$	13,652
Supplemental disclosure of non-cash investing activities:
Real property acquired in settlement of a receivable	$	11,660	$	—	$	—

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Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation Of Revenue

The following tables disaggregate revenue by end market, customer type and contract type, which the Company believes best depict how the nature, amount, timing and uncertainty of its revenue and cash flows are affected by economic factors for the years ended December 31, 2020, 2019 and 2018.

	Year Ended December 31,
(in thousands)	2020		2019		2018
Civil segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	1,367,412	$	992,755	$	702,614
Bridges	306,161		334,117		431,202
Military defense facilities	146,969		59,082		26,225
Highways	122,254		86,747		202,423
Water	101,705		33,370		10,195
Other	155,398		273,281		213,434
Total Civil segment revenue	$	2,199,899	$	1,779,352	$	1,586,093

	Year Ended December 31,
(in thousands)	2020		2019		2018
Building segment revenue by end market:
Commercial and industrial facilities	$	580,297	$	459,806	$	374,312
Hospitality and gaming	474,329		297,700		301,871
Municipal and government	287,337		254,736		261,496
Mass transit (includes transportation projects)	218,930		201,400		67,588
Education facilities	173,472		143,382		145,147
Health care facilities	117,968		239,299		428,819
Mixed use	59,391		31,685		150,549
Other	72,917		114,032		131,917
Total Building segment revenue	$	1,984,641	$	1,742,040	$	1,861,699

	Year Ended December 31,
(in thousands)	2020		2019		2018
Specialty Contractors segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)	$	592,430	$	419,402	$	296,092
Commercial and industrial facilities	152,868		186,819		189,632
Multi-unit residential	139,924		83,903		81,023
Water	73,769		37,403		22,390
Mixed use	47,022		64,302		163,308
Education facilities	44,762		70,229		99,214
Other	83,448		67,382		155,211
Total Specialty Contractors segment revenue	$	1,134,223	$	929,440	$	1,006,870

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,875,653	$	534,449	$	533,768	$	2,943,870
Federal agencies	175,933		143,327		75,067		394,327
Private owners	148,313		1,306,865		525,388		1,980,566
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,401,001	$	573,049	$	496,195	$	2,470,245
Federal agencies	116,869		153,467		11,326		281,662
Private owners	261,482		1,015,524		421,919		1,698,925
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by customer type:
State and local agencies	$	1,294,630	$	617,133	$	406,782	$	2,318,545
Federal agencies	95,567		201,745		53,335		350,647
Private owners	195,896		1,042,821		546,753		1,785,470
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

	Year Ended December 31, 2020
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,792,765	$	508,655	$	1,010,973	$	3,312,393
Guaranteed maximum price	1,829		1,136,782		15,417		1,154,028
Unit price	392,548		867		83,257		476,672
Cost plus fee and other	12,757		338,337		24,576		375,670
Total revenue	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763

	Year Ended December 31, 2019
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,315,195	$	561,831	$	769,410	$	2,646,436
Guaranteed maximum price	6,951		752,110		21,291		780,352
Unit price	436,015		12,063		91,803		539,881
Cost plus fee and other	21,191		416,036		46,936		484,163
Total revenue	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832

	Year Ended December 31, 2018
(in thousands)	Civil		Building		Specialty Contractors		Total
Revenue by contract type:
Fixed price	$	1,054,473	$	377,538	$	857,742	$	2,289,753
Guaranteed maximum price	15,709		1,040,093		62,132		1,117,934
Unit price	469,305		32,468		32,562		534,335
Cost plus fee and other	46,606		411,600		54,434		512,640
Total revenue	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662

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Contract Assets And Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Schedule Of Contract Assets And Liabilities

The amounts as included on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage receivable	$	648,441	$	562,375
Costs and estimated earnings in excess of billings:
Claims	752,783		705,993
Unapproved change orders	415,489		362,264
Other unbilled costs and profits	68,462		55,287
Total costs and estimated earnings in excess of billings	1,236,734		1,123,544
Capitalized contract costs	74,452		80,294
Total contract assets	$	1,959,627	$	1,766,213

The amount as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
Retainage payable	$	315,135	$	252,181
Billings in excess of costs and estimated earnings	839,222		844,389
Total contract liabilities	$	1,154,357	$	1,096,570

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Summary of Income Before Taxes

Income (loss) before taxes is summarized as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
United States operations	$	138,426	$	(456,403)	$	106,222
Foreign and U.S. territory operations	35,853		30,569		26,391
Total	$	174,279	$	(425,834)	$	132,613

Provision for Income Taxes

The income tax expense (benefit) is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Current (benefit) expense:
Federal	$	(36,159)	$	(2,884)	$	21,055
State	(1,282)		3,585		8,676
Foreign and U.S. territories	11,130		5,299		5,550
Total current (benefit) expense:	(26,311)		6,000		35,281
Deferred expense (benefit):
Federal	38,667		(43,579)		(1,773)
State	10,608		(27,566)		1,278
Foreign and U.S. territories	(1,022)		(464)		46
Total deferred expense (benefit):	48,253		(71,609)		(449)
Total expense (benefit):	$	21,942	$	(65,609)	$	34,832

Reconciliation of Provision for Income Taxes

The following table is a reconciliation of the Company’s income tax provision at the statutory federal tax rate to the Company’s effective tax rate:

	Year Ended December 31,
	2020				2019				2018
(dollars in thousands)	Amount		Rate		Amount		Rate		Amount		Rate
Federal income tax expense (benefit) at statutory tax rate	$	36,599	21.0	%	$	(89,425)	21.0	%	$	27,849	21.0	%
State income taxes, net of federal tax benefit	8,518		4.9		(18,442)		4.3		9,011		6.8
Stock based compensation	3,185		1.8		1,706		(0.4)		—		—
Impact of federal tax law changes	(14,476)		(8.3)		—		—		211		0.2
Officers' compensation	2,486		1.4		2,938		(0.7)		3,078		2.3
Goodwill impairment	—		—		43,990		(10.3)		—		—
Noncontrolling interests	(9,799)		(5.6)		(6,064)		1.4		(3,232)		(2.4)
Federal R&D credits	(3,007)		(1.7)		(3,998)		0.9		(2,658)		(2.0)
Reversal of reserve for uncertain tax positions due to statute expirations	(489)		(0.3)		(773)		0.2		(1,958)		(1.5)
Foreign tax rate differences	1,491		0.9		4,940		(1.2)		(19)		—
Other	(2,566)		(1.5)		(481)		0.2		2,550		1.9
Income tax expense (benefit)	$	21,942	12.6	%	$	(65,609)	15.4	%	$	34,832	26.3	%

Significant Components of Deferred Tax Assets and Liabilities

The following is a summary of the significant components of the deferred tax assets and liabilities:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets:
Timing of expense recognition	$	24,470	$	44,761
Net operating losses	19,968		23,711
Goodwill	19,315		26,658
Other, net	10,155		17,098
Deferred tax assets	73,908		112,228
Valuation allowance	—		(2,212)
Net deferred tax assets	73,908		110,016
Deferred tax liabilities:
Intangible assets, due primarily to purchase accounting	(15,212)		(15,309)
Fixed assets	(76,567)		(75,461)
Construction contract accounting	(9,769)		(13,464)
Joint ventures	(41,669)		(24,331)
Other	(11,962)		(16,567)
Deferred tax liabilities	(155,179)		(145,132)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

The net deferred tax liabilities are presented in the Consolidated Balance Sheets as follows:

	As of December 31,
(in thousands)	2020		2019
Deferred tax assets	$	1,695	$	570
Deferred tax liabilities	(82,966)		(35,686)
Net deferred tax liabilities	$	(81,271)	$	(35,116)

Reconciliation of Gross Unrecognized Tax Benefit

The Company accounts for its uncertain tax positions in accordance with GAAP. The following is a reconciliation of the beginning and ending amounts of these unrecognized tax benefits for the three years ended December 31, 2020:

	As of December 31,
(in thousands)	2020		2019		2018
Beginning balance	$	5,682	$	4,998	$	6,495
Change in tax positions of prior years	2,286		351		(302)
Change in tax positions of current year	1,202		1,106		763
Reduction in tax positions for statute expirations	(489)		(773)		(1,958)
Ending Balance	$	8,681	$	5,682	$	4,998

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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The following table presents the changes in the carrying amount of goodwill since its inception through December 31, 2020:

(in thousands)	Civil		Building		Specialty Contractors		Total
Gross goodwill as of December 31, 2018	$	492,074	$	424,724	$	156,193	$	1,072,991
Accumulated impairment as of December 31, 2018	(76,716)		(411,269)		—		(487,985)
Goodwill as of December 31, 2018	415,358		13,455		156,193		585,006
2019 impairment	(210,215)		(13,455)		(156,193)		(379,863)
Goodwill as of December 31, 2019	205,143		—		—		205,143
Current year activity	—		—		—		—
Goodwill as of December 31, 2020(a)	$	205,143	$	—	$	—	$	205,143

_____________________________________________________________________________________________________________

(a)As of December 31, 2020, accumulated impairment was $867.8 million.

Schedule of Finite and Indefinite Lived Intangible Assets

Intangible assets consist of the following:

	As of December 31, 2020								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(23,754)		(23,232)		27,364		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(22,103)		(16,645)		1,052		12 years
Construction contract backlog	149,290		(105,001)		—		44,289		3 years
Total	$	387,040	$	(150,858)	$	(113,067)	$	123,115

	As of December 31, 2019								Weighted-Average Amortization Period
(in thousands)	Cost		Accumulated Amortization		Accumulated Impairment Charge		Carrying Value
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)	74,350		(21,267)		(23,232)		29,851		20 years
Contractor license	6,000		—		(6,000)		—		N/A
Customer relationships	39,800		(21,048)		(16,645)		2,107		12 years
Construction contract backlog	149,290		(76,388)		—		72,902		3 years
Total	$	387,040	$	(118,703)	$	(113,067)	$	155,270

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Financial Commitments (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt as reported on the Consolidated Balance Sheets consisted of the following:

	As of December 31,
(in thousands)	2020		2019
2017 Senior Notes	$	495,271	$	494,365
Term Loan B	408,458		N/A
2020 Revolver	—		N/A
2017 Credit Facility	N/A		114,000
Convertible Notes(a)	67,878		182,292
Equipment financing and mortgages	47,594		39,159
Other indebtedness	6,264		4,660
Total debt	1,025,465		834,476
Less: Current maturities	100,188		124,054
Long-term debt, net	$	925,277	$	710,422

_____________________________________________________________________________________________________________

(a)The Company will repurchase or retire the remaining Convertible Notes at or before their June 15, 2021 maturity using proceeds from the Term Loan B, $69.9 million of which is currently held in a restricted cash account for this purpose.

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

The following table reconciles the outstanding debt balances to the reported debt balances as of December 31, 2020 and 2019:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Outstanding Debt		Unamortized Discounts and Issuance Costs		Debt, as reported		Outstanding Debt		Unamortized Discount and Issuance Costs		Debt, as reported
2017 Senior Notes	$	500,000	$	(4,729)	$	495,271	$	500,000	$	(5,635)	$	494,365
Term Loan B	423,938		(15,480)		408,458		N/A		N/A		N/A
Convertible Notes	69,918		(2,040)		67,878		200,000		(17,708)		182,292

Summary Of Information Related To The Liability And Equity Components Of The Convertible Notes

The following table presents information related to the liability and equity components of the Convertible Notes:

(in thousands)	December 31, 2020		December 31, 2019
Liability component:
Principal	$	69,918	$	200,000
Conversion feature	(46,800)		(46,800)
Allocated debt issuance costs	(5,051)		(5,051)
Amortization and extinguishment of discount and debt issuance costs (non-cash interest expense)	49,811		34,143
Net carrying amount	$	67,878	$	182,292
Equity component:
Conversion feature	$	46,800	$	46,800
Reacquisition of conversion option from repurchase of notes, net of tax	(764)		—
Allocated debt issuance costs	(1,543)		(1,543)
Deferred taxes	(18,815)		(18,815)
Net carrying amount	$	25,678	$	26,442

Principal Payments of Long-Term Debt

The following table presents the future principal payments required under all of the Company’s debt obligations, discussed above:

Year (in thousands)
2021	$	102,228
2022	14,822
2023	14,282
2024	7,498
2025	506,156
Thereafter	402,728
	1,047,714
Less: Unamortized discount and issuance costs	22,249
Total	$	1,025,465

Summary Of Interest Expense As Reported In The Consolidated Statements of Operations

Interest expense as reported in the Consolidated Statements of Operations consisted of the following:

	For the year ended December 31,
(in thousands)	2020		2019		2018
Cash interest expense:
Interest on 2017 Senior Notes	$	34,375	$	34,375	$	34,375
Interest on Term Loan B	9,028		N/A		N/A
Interest on 2020 Revolver	77		N/A		N/A
Interest on 2017 Credit Facility	5,341		11,990		8,575
Interest on Convertible Notes	4,373		5,750		5,750
Other interest	2,079		2,172		2,747
Cash portion of loss on extinguishment	786		—		—
Total cash interest expense	56,059		54,287		51,447
Non-cash interest expense(a):
Amortization of discount and debt issuance costs on Convertible Notes	8,944		10,811		9,846
Amortization of discount and debt issuance costs on Term Loan B	784		N/A		N/A
Amortization of debt issuance costs on 2020 Revolver	206		N/A		N/A
Amortization of debt issuance costs on 2017 Credit Facility	1,001		1,552		1,439
Amortization of debt issuance costs on 2017 Senior Notes	906		844		787
Non-cash portion of loss on extinguishment	8,312		—		—
Total non-cash interest expense	20,153		13,207		12,072
Total interest expense	$	76,212	$	67,494	$	63,519

_____________________________________________________________________________________________________________

(a)The combination of cash and non-cash interest expense produces effective interest rates that are higher than contractual rates. Accordingly, the effective interest rates for the 2017 Senior Notes, Term Loan B and the Convertible Notes were 7.13%, 6.49% and 9.39%, respectively, for the year ended December 31, 2020

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Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Components of Lease Expense

The following table presents components of lease expense for the years ended December 31, 2020 and 2019:

	For the year ended December 31,
(in thousands)	2020		2019
Operating lease expense	$	14,547	$	15,854
Short-term lease expense(a)	87,969		72,562
	102,516		88,416
Less: Sublease income	1,026		1,077
Total lease expense	$	101,490	$	87,339

(a)Short-term lease expense includes all leases with lease terms ranging from less than one month to one year. Short-term leases include, among other things, construction equipment rented on an as-needed basis as well as temporary housing.

Supplemental Financial Statement Information Related To Leases

The following table presents supplemental balance sheet information related to operating leases:

		As of December 31,
(dollars in thousands)	Balance Sheet Line Item	2020			2019
Assets
ROU assets	Other assets	$	55,897		$	40,156
Total lease assets		$	55,897		$	40,156
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	7,661		$	11,392
Long-term lease liabilities	Other long-term liabilities	51,336			31,900
Total lease liabilities		$	58,997		$	43,292
Weighted-average remaining lease term		12.5 years			5.0 years
Weighted-average discount rate		9.22		%	5.96		%

The following table presents supplemental cash flow information and non-cash activity related to operating leases:

	As of December 31,
(in thousands)	2020		2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(14,591)	$	(15,658)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	29,244	$	9,784

Maturity of Leases Liabilities on an Undiscounted Basis

The following table presents maturities of operating lease liabilities on an undiscounted basis as of December 31, 2020:

Year (in thousands)	Operating Leases
2021	$	12,512
2022	10,528
2023	7,723
2024	6,141
2025	5,354
Thereafter	65,633
Total lease payments	107,891
Less: Imputed interest	48,894
Total	$	58,997

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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Summary of Restricted Stock Unit and Stock Option Activity

The following table summarizes restricted stock unit and stock option activity:

	Restricted Stock Units			Stock Options
	Number	Weighted- Average Grant Date Fair Value Per Share		Number	Weighted- Average Exercise/ (Strike) Price Per Share
Outstanding as of December 31, 2017	1,397,984	$	30.11	2,554,034	$	20.45
Granted	699,000	24.21		664,000	23.20
Expired or cancelled	(240,289)	32.76		(274,990)	22.82
Vested/exercised	(387,695)	28.67		—	—
Outstanding as of December 31, 2018	1,469,000	$	27.27	2,943,044	$	20.89
Granted	530,000	20.23		220,000	19.66
Expired or cancelled	(104,029)	28.98		(884,029)	21.03
Vested/exercised	(179,971)	25.39		—	—
Outstanding as of December 31, 2019	1,715,000	$	25.19	2,279,015	$	20.62
Granted	245,000	20.67		165,000	19.24
Expired or cancelled	(403,750)	25.52		(168,750)	25.87
Vested/exercised	(521,250)	29.44		—	—
Outstanding as of December 31, 2020	1,035,000	$	21.85	2,275,265	$	20.13

Summary Of Unrestricted Stock Units Issuance

The following table summarizes unrestricted stock units, which are generally issued to the non-employee members of the Company’s Board of Directors as part of their annual retainer fees:

	Unrestricted Stock Units
Year	Number	Weighted-Average Grant Date Fair Value Per Share
2018	115,420	$	21.26
2019	98,591	15.72
2020	194,177	8.60

Weighted-Average Assumptions Used in Estimating Grant Date Fair Values of Stock Option Awards

The fair value on the grant date and the significant assumptions used in the Black-Scholes option-pricing model are as follows:

	Year Ended December 31,
	2020			2019			2018
Total stock options granted	165,000			220,000			664,000
Weighted-average grant date fair value	$	7.67		$	7.59		$	11.09
Weighted-average assumptions:
Risk-free rate	1.2		%	2.1		%	2.6		%
Expected life of options(a)	6.3 years			6.1 years			5.8 years
Expected volatility(b)	60.7		%	39.4		%	42.2		%
Expected quarterly dividends	$	—		$	—		$	—

_____________________________________________________________________________________________________________

(a)Calculated using the simplified method due to the terms of the stock options and the limited pool of grantees.

(b)Calculated using historical volatility of the Company’s common stock over periods commensurate with the expected life of the option.

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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Summary of Net Periodic Benefit Cost

The following table sets forth a summary of net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
(in thousands)	2020			2019			2018
Interest cost	$	3,032		$	3,801		$	3,496
Service cost	925			900			875
Expected return on plan assets	(4,022)			(4,170)			(4,302)
Recognized net actuarial losses	2,407			1,933			2,067
Net periodic benefit cost	$	2,342		$	2,464		$	2,136
Actuarial assumptions used to determine net cost:
Discount rate	3.07		%	4.12		%	3.45		%
Expected return on assets	5.75		%	5.75		%	6.00		%
Rate of increase in compensation	N/A			N/A			N/A

Target and Actual Asset Allocation for Pension Plan by Asset Category

The target asset allocation for the Company’s pension plan by asset category for 2021 and the actual asset allocation as of December 31, 2020 and 2019 by asset category are as follows:

	Percentage of Plan Assets as of December 31,
	Target Allocation 2021
			Actual Allocation
Asset Category			2020		2019
Cash	5	%	5	%	4	%
Equity funds:
Domestic	35		34		47
International	15		17		18
Fixed income funds	45		44		31
Total	100	%	100	%	100	%

Future Benefit Payments Under the Plans

Future benefit payments under the plans are estimated as follows:

(in thousands)
Year ended December 31,
2021	$	6,800
2022	6,746
2023	6,657
2024	6,617
2025	6,526
2026-2030	30,704
Total	$	64,050

Reconciliation of Changes in Fair Value of Plan Assets, Plan Benefit Obligations and Funded Status

The following tables provide a reconciliation of the changes in the fair value of plan assets and plan benefit obligations during 2020 and 2019, and a summary of the funded status as of December 31, 2020 and 2019:

	Year Ended December 31,
(in thousands)	2020		2019
Change in Fair Value of Plan Assets
Balance at beginning of year	$	73,357	$	63,109
Actual return on plan assets	899		12,123
Company contribution	4,408		4,793
Benefit payments	(6,724)		(6,668)
Balance at end of year	$	71,940	$	73,357

	Year Ended December 31,
(in thousands)	2020		2019
Change in Benefit Obligations
Balance at beginning of year	$	102,607	$	95,869
Interest cost	3,032		3,801
Service cost	925		900
Assumption change loss	7,902		8,373
Actuarial loss	81		332
Benefit payments	(6,723)		(6,668)
Balance at end of year	$	107,824	$	102,607

Amount Recognized in Consolidated Balance Sheets

	As of December 31,
(in thousands)	2020		2019
Funded status	$	(35,884)	$	(29,250)
Net unfunded amounts recognized in Consolidated Balance Sheets consist of:
Current liabilities	$	(293)	$	(279)
Long-term liabilities	(35,591)		(28,971)
Total net unfunded amount recognized in Consolidated Balance Sheets	$	(35,884)	$	(29,250)

Plan Assets at Fair Value

The following table sets forth the pension plan assets at fair value in accordance with the fair value hierarchy described in Note 12:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	1,582	$	—	$	—	$	1,582	$	2,867	$	—	$	—	$	2,867
Fixed income funds	2,000		3,086		—		5,086		—		2,861		—		2,861
Mutual funds	54,671		—		—		54,671		54,085		—		—		54,085
	$	58,253	$	3,086	$	—	$	61,339	$	56,952	$	2,861	$	—	$	59,813
Closely held funds(a)
Equity partnerships							3,700								3,660
Hedge fund investments							6,901								9,884
Total closely held funds(a)							10,601								13,544
Total	$	58,253	$	3,086	$	—	$	71,940	$	56,952	$	2,861	$	—	$	73,357

_____________________________________________________________________________________________________________

(a)Closely held funds in private investment were comprised of a combination of Level 1, 2 and 3 investments, but were not categorized in the fair value hierarchy because they were measured at NAV using the practical expedient under ASC 820, Fair Value Measurement (“ASC 820”).

Benefit Obligations in Excess of Fair Value of Plan's Assets

The plans have benefit obligations in excess of the fair value of each plan’s assets as follows:

	As of December 31, 2020						As of December 31, 2019
(in thousands)	Pension Plan		Benefit Equalization Plan		Total		Pension Plan		Benefit Equalization Plan		Total
Projected benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Accumulated benefit obligation	$	104,657	$	3,167	$	107,824	$	99,515	$	3,092	$	102,607
Fair value of plans' assets	71,940		—		71,940		73,357		—		73,357
Projected benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250
Accumulated benefit obligation greater than fair value of plans' assets	$	32,717	$	3,167	$	35,884	$	26,158	$	3,092	$	29,250

Summary of Key Information for the Plans

The following table summarizes key information for the plans that the Company made significant contributions to during the three years ended December 31, 2020:

Pension Protections Act Zone Status

FIP/RP Status Pending Or Implemented

Company Contributions (amounts in millions)

Expiration Date of Collective Bargaining Agreement

Pension Fund

EIN/Pension Plan Number

2020

2019

2020(b)

2019(b)

2018

Surcharge Imposed

The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund

13-6123601/001

Green

Green

N/A

$

10.1

$

9.3

(a)

$

12.2

(a)

No

4/13/2022

Excavators Union Local 731 Pension Fund

13-1809825/002

Green

Green

N/A

4.8

5.1

4.1

No

4/30/2022

Carpenters Pension Trust Fund for Northern California

94-6050970

Red

Red

Implemented

4.6

4.0

4.9

No

6/30/2023

Northern California Electrical Workers Pension Plan

94-6062674

Green

Green

N/A

3.5

3.0

4.1

No

5/31/2022

_____________________________________________________________________________________________________________

(a)These amounts exceeded 5% of the respective total plan contributions.

(b)The Company's contributions as a percentage of total plan contributions were not available for the 2020 and 2019 plan years for any of the above pension funds, excluding The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund, Excavators Union Local 731 Pension Fund and Northern California Electrical Workers Pension Plan for the 2019 plan year.

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following fair value hierarchy table presents the Company’s assets that are measured at fair value on a recurring basis as of December 31, 2020 and 2019:

	As of December 31, 2020								As of December 31, 2019
	Fair Value Hierarchy								Fair Value Hierarchy
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents(a)	$	374,289	$	—	$	—	$	374,289	$	193,685	$	—	$	—	$	193,685
Restricted cash(a)	77,563		—		—		77,563		8,416		—		—		8,416
Restricted investments(b)	—		78,912		—		78,912		—		70,974		—		70,974
Investments in lieu of retainage(c)	92,609		1,300		—		93,909		89,572		1,219		—		90,791
Total	$	544,461	$	80,212	$	—	$	624,673	$	291,673	$	72,193	$	—	$	363,866

_____________________________________________________________________________________________________________

(a)Includes money market funds and short-term investments with maturity dates of three months or less when acquired.

(b)Restricted investments, as of December 31, 2020, consist of investments in U.S. government agency securities of $40.5 million, corporate debt securities of $37.5 million and corporate certificates of deposits of $0.9 million, all with maturities of up to five years, and are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets and are therefore classified as Level 2 assets. As of December 31, 2019, restricted investments consisted of investments in corporate debt securities of $35.8 million and U.S. government agency securities of $33.8 million and corporate certificates of deposits of $1.4 million, all with maturities of up to five years. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

(c)Investments in lieu of retainage are included in retainage receivable and as of December 31, 2020 are comprised of money market funds of $92.6 million and municipal bonds of $1.3 million. The fair values of the money market funds are measured using quoted market prices; therefore, they are classified as Level 1 assets. The fair values of municipal bonds are measured using readily available pricing sources for comparable instruments; therefore, they are classified as Level 2 assets. As of December 31, 2019, investments in lieu of retainage consisted of money market funds of $89.6 million and

municipal bonds of $1.2 million. The amortized cost of these available-for-sale securities at December 31, 2020 and 2019 was not materially different from the fair value.

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Business Segments (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Reportable Segments

The following tables set forth certain reportable segment information relating to the Company’s operations for the years ended December 31, 2020, 2019 and 2018:

	Reportable Segments
(in thousands)	Civil		Building		Specialty Contractors		Total		Corporate			Consolidated Total
Year ended December 31, 2020
Total revenue	$	2,565,210	$	2,114,459	$	1,135,018	$	5,814,687	$	—		$	5,814,687
Elimination of intersegment revenue	(365,311)		(129,818)		(795)		(495,924)		—			(495,924)
Revenue from external customers	$	2,199,899	$	1,984,641	$	1,134,223	$	5,318,763	$	—		$	5,318,763
Income (loss) from construction operations(a)	$	245,835	$	53,158	$	17,203	$	316,196	$	(53,852)	(b)	$	262,344
Capital expenditures	$	51,044	$	878	$	1,917	$	53,839	$	942		$	54,781
Depreciation and amortization(c)	$	90,250	$	1,703	$	3,983	$	95,936	$	11,098		$	107,034
Year ended December 31, 2019
Total revenue	$	2,054,097	$	1,764,753	$	929,738	$	4,748,588	$	—		$	4,748,588
Elimination of intersegment revenue	(274,745)		(22,713)		(298)		(297,756)		—			(297,756)
Revenue from external customers	$	1,779,352	$	1,742,040	$	929,440	$	4,450,832	$	—		$	4,450,832
Income (loss) from construction operations(d)	$	(150,837)	$	23,655	$	(172,637)	$	(299,819)	$	(65,188)	(b)	$	(365,007)
Capital expenditures	$	82,156	$	518	$	688	$	83,362	$	834		$	84,196
Depreciation and amortization(c)	$	47,905	$	1,934	$	4,136	$	53,975	$	11,069		$	65,044
Year ended December 31, 2018
Total revenue	$	1,810,232	$	1,866,902	$	1,006,870	$	4,684,004	$	—		$	4,684,004
Elimination of intersegment revenue	(224,139)		(5,203)		—		(229,342)		—			(229,342)
Revenue from external customers	$	1,586,093	$	1,861,699	$	1,006,870	$	4,454,662	$	—		$	4,454,662
Income (loss) from construction operations(e)	$	168,256	$	43,939	$	43,430	$	255,625	$	(63,749)	(b)	$	191,876
Capital expenditures	$	73,866	$	1,655	$	777	$	76,298	$	771		$	77,069
Depreciation and amortization(c)	$	29,685	$	1,956	$	4,358	$	35,999	$	11,268		$	47,267

_____________________________________________________________________________________________________________

(a)During the year ended December 31, 2020, the Company recorded a charge of $15.2 million in income (loss) from construction operations (an after-tax impact of $11.0 million, or $0.22 per diluted share) due to an unfavorable legal ruling pertaining to a mechanical project in California in the Specialty Contractors segment, as well as a charge of $13.2 million (an after-tax impact of $9.6 million, or $0.19 per diluted share) due to an adverse arbitration ruling pertaining to an electrical project in New York in the Specialty Contractors segment. The Company also recorded a gain of $25.7 million in Specialty Contractors segment general and administrative expenses (an after-tax impact of $18.6 million, or $0.36 per diluted share) as a result of a favorable arbitration decision and subsequent settlement of the related employment dispute.

(b)Consists primarily of corporate general and administrative expenses.

(c)Depreciation and amortization is included in income (loss) from construction operations.

(d)During the year ended December 31, 2019, the Company recorded a non-cash goodwill impairment charge of $379.9 million in income (loss) from construction operations (an after-tax impact of $330.5 million, or $6.58 per diluted share) resulting from an interim impairment test the Company performed as of June 1, 2019. For further information and breakdown of the goodwill impairment charge by segment, see Note 6. In addition, during the year ended December 31, 2019 the Company recorded a charge of $166.8 million in income (loss) from construction operations (an after-tax impact of $119.4 million, or $2.38 per diluted share), which principally impacted the Civil segment, as a result of the adverse jury verdict on the Alaskan Way Viaduct (SR 99) Matter, as discussed in Note 8. Lastly, the Company recognized a one-time gain of $37.8 million (an after-tax impact of $27.1 million, or $0.54 per diluted share) in Civil segment general and administrative expenses related to a remeasurement of its investment in a joint venture (see Note 12).

(e)During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in income (loss) from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.

Total Assets for Reportable Segments

Total assets by segment were as follows:

	As of December 31,
(in thousands)	2020		2019
Civil	$	3,141,991	$	2,791,402
Building	1,147,649		995,298
Specialty Contractors	673,891		635,180
Corporate and other(a)	82,086		63,897
Total assets	$	5,045,617	$	4,485,777

_____________________________________________________________________________________________________________

(a)    Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

Principal Geographical Areas

Information concerning principal geographic areas is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Revenue:
United States	$	4,953,045	$	4,073,691	$	4,180,206
Foreign and U.S. territories	365,718		377,141		274,456
Total revenue	$	5,318,763	$	4,450,832	$	4,454,662

	As of December 31,
(in thousands)	2020		2019
Assets:
United States	$	4,836,735	$	4,271,722
Foreign and U.S. territories	208,882		214,055
Total assets	$	5,045,617	$	4,485,777

Reconciliation of Segment Results to Consolidated Income Before Income Taxes

A reconciliation of segment results to the consolidated income (loss) before income taxes is as follows:

	Year Ended December 31,
(in thousands)	2020		2019		2018
Income (loss) from construction operations	$	262,344	$	(365,007)	$	191,876
Other income (expense)	(11,853)		6,667		4,256
Interest expense	(76,212)		(67,494)		(63,519)
Income (loss) before income taxes	$	174,279	$	(425,834)	$	132,613

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Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Selected Financial Data

The following table presents selected unaudited quarterly financial data for each full quarterly period of 2020 and 2019:

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2020
Revenue	$	1,250,729	$	1,276,427	$	1,442,091	$	1,349,516
Gross profit	111,080		117,754		124,915		132,404
Income from construction operations	47,227		57,696		83,021		74,400
Income before income taxes	31,272		40,435		49,360		53,212
Net income	26,138		30,859		49,323		46,017
Net income attributable to Tutor Perini Corporation	17,371		18,709		36,819		35,495
Earnings per common share:
Basic	$	0.35	$	0.37	$	0.72	$	0.70
Diluted	$	0.34	$	0.37	$	0.72	$	0.69

(in thousands, except per common share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2019
Revenue	$	958,487	$	1,125,275	$	1,189,345	$	1,177,725
Gross profit (loss)	88,470		100,943		115,063		(62,704)
Income (loss) from construction operations	22,913		(341,717)		47,943		(94,146)
Income (loss) before income taxes	6,910		(358,339)		32,312		(106,717)
Net income (loss)	4,722		(315,439)		26,721		(76,229)
Net income (loss) attributable to Tutor Perini Corporation	(356)		(320,530)		19,313		(86,117)
Earnings (loss) per common share:
Basic	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)
Diluted	$	(0.01)	$	(6.38)	$	0.38	$	(1.71)

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill impairment charge	$ 0	$ 379,863	$ 0
Restricted cash held to repay outstanding debt	$ 69,900
Minimum
Estimated useful lives	3 years
Maximum
Estimated useful lives	40 years

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Summary of Significant Accounting Policies (Calculations of Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Net income (loss) attributable to Tutor Perini Corporation	$ 35,495	$ 36,819	$ 18,709	$ 17,371	$ (86,117)	$ 19,313	$ (320,530)	$ (356)	$ 108,394	$ (387,690)	$ 83,436
Weighted-average common shares outstanding, basic (in shares)									50,656	50,220	49,952
Effect of dilutive restricted stock units and stock options (in shares)									421	0	349
Weighted-average common shares outstanding, diluted (in shares)									51,077	50,220	50,301
Basic (in dollars per share)	$ 0.70	$ 0.72	$ 0.37	$ 0.35	$ (1.71)	$ 0.38	$ (6.38)	$ (0.01)	$ 2.14	$ (7.72)	$ 1.67
Diluted (in dollars per share)	$ 0.69	$ 0.72	$ 0.37	$ 0.34	$ (1.71)	$ 0.38	$ (6.38)	$ (0.01)	$ 2.12	$ (7.72)	$ 1.66
Anti-dilutive securities not included above (in shares)									1,862	3,640	2,670

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Summary of Significant Accounting Policies (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 374,289	$ 193,685
Restricted cash	77,563	8,416
Total cash, cash equivalents and restricted cash	451,852	202,101	$ 119,863	$ 197,648
General Corporate Purposes
Cash and cash equivalents	210,841	43,760
Joint Venture
Cash and cash equivalents	$ 163,448	$ 149,925

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Summary of Significant Accounting Policies (Tax Effects of Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Defined benefit pension plan adjustments, Before-Tax Amount	$ (8,700)	$ 1,180	$ 1,079
Defined benefit pension plan adjustments, Tax (Expense) Benefit	2,439	(336)	(308)
Defined benefit pension plan adjustments, Net-of-Tax Amount	(6,261)	844	771
Foreign currency translation adjustment, Before-Tax Amount	178	1,867	(4,067)
Foreign currency translation adjustment, Tax (Expense) Benefit	101	(530)	1,122
Foreign currency translation adjustment, Net-of-Tax Amount	279	1,337	(2,945)
Unrealized gain (loss) in fair value of investments, Before-Tax Amount	2,015	1,982	(1,005)
Unrealized gain (loss) in fair value of investments, Tax (Expense) Benefit	(444)	(421)	227
Unrealized gain (loss) in fair value of investments, Net-of-Tax Amount	1,571	1,561	(778)
Total other comprehensive income (loss), Before-Tax Amount	(6,507)	5,029	(3,993)
Total other comprehensive income (loss), Tax (Expense) Benefit	2,096	(1,287)	1,041
Total other comprehensive income (loss), Net-of-Tax Amount	(4,411)	3,742	(2,952)
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Before-Tax Amount	230	393	(221)
Less: Other comprehensive income (loss) attributable to noncontrolling interest, Tax (Expense) Benefit	0	0	0
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax Amount	230	393	(221)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Before-Tax Amount	(6,737)	4,636	(3,772)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Tax (Expense) Benefit	2,096	(1,287)	1,041
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Net-of-Tax Amount	$ (4,641)	$ 3,349	$ (2,731)

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Summary of Significant Accounting Policies (Changes in AOCI Balances by Component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Beginning balance	$ 1,440,142
Ending balance	1,553,856	$ 1,440,142
Accumulated Other Comprehensive Loss
Beginning balance	(42,100)	(45,449)	$ (42,718)
Other comprehensive loss before reclassifications	(6,124)	2,026	(4,254)
Amounts reclassified from AOCI	1,483	1,323	1,523
Ending balance	(46,741)	(42,100)	(45,449)
Defined Benefit Pension Plan
Beginning balance	(37,826)	(38,670)	(39,441)
Other comprehensive loss before reclassifications	(7,993)	(539)	(695)
Amounts reclassified from AOCI	1,732	1,383	1,466
Ending balance	(44,087)	(37,826)	(38,670)
Foreign Currency Translation
Beginning balance	(5,371)	(6,315)	(3,591)
Other comprehensive loss before reclassifications	49	944	(2,724)
Amounts reclassified from AOCI	0	0	0
Ending balance	(5,322)	(5,371)	(6,315)
Unrealized Gain (Loss) in Fair Value of Investments
Beginning balance	1,097	(464)	314
Other comprehensive loss before reclassifications	1,820	1,621	(835)
Amounts reclassified from AOCI	(249)	(60)	57
Ending balance	$ 2,668	$ 1,097	$ (464)

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Summary of Significant Accounting Policies - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									$ (11,853)	$ 6,667	$ 4,256
Income tax expense (benefit)									(21,942)	65,609	(34,832)
Net income (loss) attributable to Tutor Perini Corporation	$ 35,495	$ 36,819	$ 18,709	$ 17,371	$ (86,117)	$ 19,313	$ (320,530)	$ (356)	108,394	(387,690)	83,436
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Pension Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									2,407	1,933	2,052
Income tax expense (benefit)									(675)	(550)	(586)
Net income (loss) attributable to Tutor Perini Corporation									1,732	1,383	1,466
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) in Fair Value of Investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									(315)	(76)	72
Income tax expense (benefit)									66	16	(15)
Net income (loss) attributable to Tutor Perini Corporation									$ (249)	$ (60)	$ 57

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Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Accounts receivable	$ (104,901)	$ (81,983)	$ 3,899
Retainage receivable	(85,769)	(78,520)	56,754
Costs and estimated earnings in excess of billings	(113,190)	18,751	(209,537)
Other current assets	(49,468)	(76,146)	15,398
Accounts payable	111,912	53,999	(78,243)
Retainage payable	62,954	35,013	(49,864)
Billings in excess of costs and estimated earnings	(5,168)	245,292	76,703
Accrued expenses and other current liabilities	13,654	14,851	28,046
Changes in other components of working capital	(169,976)	131,257	(156,844)
Interest	57,038	56,137	51,063
Income taxes	11,204	43,374	13,652
Supplemental disclosure of non-cash investing activities:
Real property acquired in settlement of a receivable	$ 11,660	$ 0	$ 0

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Revenue (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenue recognized related to performance obligations satisfies (or partially satisfied) in prior periods	$ 77.0	$ 177.5	$ 19.4
Alaskan Way Viaduct Matter
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenue recognized related to performance obligations satisfies (or partially satisfied) in prior periods		123.9
Civil
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation amount	$ 4,800.0	5,200.0
Civil | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation period range	3 years
Civil | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation period range	5 years
Building
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation amount	$ 1,500.0	2,200.0
Specialty Contractors
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation amount	$ 1,800.0	$ 2,200.0
Building And Specialty Contractors | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation period range	1 year
Building And Specialty Contractors | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation period range	3 years

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Revenue (Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
REVENUE	$ 1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	$ 1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	$ 4,450,832	$ 4,454,662
State and local agencies
Disaggregation of Revenue [Line Items]
REVENUE									2,943,870	2,470,245	2,318,545
Federal agencies
Disaggregation of Revenue [Line Items]
REVENUE									394,327	281,662	350,647
Private owners
Disaggregation of Revenue [Line Items]
REVENUE									1,980,566	1,698,925	1,785,470
Civil
Disaggregation of Revenue [Line Items]
REVENUE									2,199,899	1,779,352	1,586,093
Civil | State and local agencies
Disaggregation of Revenue [Line Items]
REVENUE									1,875,653	1,401,001	1,294,630
Civil | Federal agencies
Disaggregation of Revenue [Line Items]
REVENUE									175,933	116,869	95,567
Civil | Private owners
Disaggregation of Revenue [Line Items]
REVENUE									148,313	261,482	195,896
Civil | Mass transit (includes certain transportation and tunneling projects)
Disaggregation of Revenue [Line Items]
REVENUE									1,367,412	992,755	702,614
Civil | Bridges
Disaggregation of Revenue [Line Items]
REVENUE									306,161	334,117	431,202
Civil | Military defense facilities
Disaggregation of Revenue [Line Items]
REVENUE									146,969	59,082	26,225
Civil | Highways
Disaggregation of Revenue [Line Items]
REVENUE									122,254	86,747	202,423
Civil | Water
Disaggregation of Revenue [Line Items]
REVENUE									101,705	33,370	10,195
Civil | Other
Disaggregation of Revenue [Line Items]
REVENUE									155,398	273,281	213,434
Building
Disaggregation of Revenue [Line Items]
REVENUE									1,984,641	1,742,040	1,861,699
Building | State and local agencies
Disaggregation of Revenue [Line Items]
REVENUE									534,449	573,049	617,133
Building | Federal agencies
Disaggregation of Revenue [Line Items]
REVENUE									143,327	153,467	201,745
Building | Private owners
Disaggregation of Revenue [Line Items]
REVENUE									1,306,865	1,015,524	1,042,821
Building | Mass transit (includes certain transportation and tunneling projects)
Disaggregation of Revenue [Line Items]
REVENUE									218,930	201,400	67,588
Building | Mixed use
Disaggregation of Revenue [Line Items]
REVENUE									59,391	31,685	150,549
Building | Commercial and industrial facilities
Disaggregation of Revenue [Line Items]
REVENUE									580,297	459,806	374,312
Building | Hospitality and gaming
Disaggregation of Revenue [Line Items]
REVENUE									474,329	297,700	301,871
Building | Municipal and government
Disaggregation of Revenue [Line Items]
REVENUE									287,337	254,736	261,496
Building | Education facilities
Disaggregation of Revenue [Line Items]
REVENUE									173,472	143,382	145,147
Building | Health care facilities
Disaggregation of Revenue [Line Items]
REVENUE									117,968	239,299	428,819
Building | Other
Disaggregation of Revenue [Line Items]
REVENUE									72,917	114,032	131,917
Specialty Contractors
Disaggregation of Revenue [Line Items]
REVENUE									1,134,223	929,440	1,006,870
Specialty Contractors | State and local agencies
Disaggregation of Revenue [Line Items]
REVENUE									533,768	496,195	406,782
Specialty Contractors | Federal agencies
Disaggregation of Revenue [Line Items]
REVENUE									75,067	11,326	53,335
Specialty Contractors | Private owners
Disaggregation of Revenue [Line Items]
REVENUE									525,388	421,919	546,753
Specialty Contractors | Mass transit (includes certain transportation and tunneling projects)
Disaggregation of Revenue [Line Items]
REVENUE									592,430	419,402	296,092
Specialty Contractors | Water
Disaggregation of Revenue [Line Items]
REVENUE									73,769	37,403	22,390
Specialty Contractors | Mixed use
Disaggregation of Revenue [Line Items]
REVENUE									47,022	64,302	163,308
Specialty Contractors | Commercial and industrial facilities
Disaggregation of Revenue [Line Items]
REVENUE									152,868	186,819	189,632
Specialty Contractors | Education facilities
Disaggregation of Revenue [Line Items]
REVENUE									44,762	70,229	99,214
Specialty Contractors | Multi-unit residential
Disaggregation of Revenue [Line Items]
REVENUE									139,924	83,903	81,023
Specialty Contractors | Other
Disaggregation of Revenue [Line Items]
REVENUE									$ 83,448	$ 67,382	$ 155,211

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Revenue (Schedule Of Revenue By Contract Type) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
REVENUE	$ 1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	$ 1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	$ 4,450,832	$ 4,454,662
Fixed price
Disaggregation of Revenue [Line Items]
REVENUE									3,312,393	2,646,436	2,289,753
Guaranteed maximum price
Disaggregation of Revenue [Line Items]
REVENUE									1,154,028	780,352	1,117,934
Unit price
Disaggregation of Revenue [Line Items]
REVENUE									476,672	539,881	534,335
Cost plus fee and other
Disaggregation of Revenue [Line Items]
REVENUE									375,670	484,163	512,640
Civil
Disaggregation of Revenue [Line Items]
REVENUE									2,199,899	1,779,352	1,586,093
Civil | Fixed price
Disaggregation of Revenue [Line Items]
REVENUE									1,792,765	1,315,195	1,054,473
Civil | Guaranteed maximum price
Disaggregation of Revenue [Line Items]
REVENUE									1,829	6,951	15,709
Civil | Unit price
Disaggregation of Revenue [Line Items]
REVENUE									392,548	436,015	469,305
Civil | Cost plus fee and other
Disaggregation of Revenue [Line Items]
REVENUE									12,757	21,191	46,606
Building
Disaggregation of Revenue [Line Items]
REVENUE									1,984,641	1,742,040	1,861,699
Building | Fixed price
Disaggregation of Revenue [Line Items]
REVENUE									508,655	561,831	377,538
Building | Guaranteed maximum price
Disaggregation of Revenue [Line Items]
REVENUE									1,136,782	752,110	1,040,093
Building | Unit price
Disaggregation of Revenue [Line Items]
REVENUE									867	12,063	32,468
Building | Cost plus fee and other
Disaggregation of Revenue [Line Items]
REVENUE									338,337	416,036	411,600
Specialty Contractors
Disaggregation of Revenue [Line Items]
REVENUE									1,134,223	929,440	1,006,870
Specialty Contractors | Fixed price
Disaggregation of Revenue [Line Items]
REVENUE									1,010,973	769,410	857,742
Specialty Contractors | Guaranteed maximum price
Disaggregation of Revenue [Line Items]
REVENUE									15,417	21,291	62,132
Specialty Contractors | Unit price
Disaggregation of Revenue [Line Items]
REVENUE									83,257	91,803	32,562
Specialty Contractors | Cost plus fee and other
Disaggregation of Revenue [Line Items]
REVENUE									$ 24,576	$ 46,936	$ 54,434

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Contract Assets And Liabilities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Retainage receivable estimated by management to be collected beyond one year, percentage	38.00%
Costs and estimated earnings in excess of billings estimated to be collected	$ 756.2
Capitalized contract costs were amortized and recognized as expense	$ 46.7	$ 33.8	$ 16.3
Retainage payable estimated by management to be remitted beyond one year, percentage	38.00%
Revenue recognized	$ 690.7	$ 479.6	$ 382.7

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Contract Assets And Liabilities (Schedule Of Contract Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Retainage receivable	$ 648,441	$ 562,375
Claims	752,783	705,993
Unapproved change orders	415,489	362,264
Other unbilled costs and profits	68,462	55,287
Total costs and estimated earnings in excess of billings	1,236,734	1,123,544
Capitalized contract costs	74,452	80,294
Total contract assets	$ 1,959,627	$ 1,766,213

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Contract Assets And Liabilities (Schedule Of Contract Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Retainage payable	$ 315,135	$ 252,181
Billings in excess of costs and estimated earnings	839,222	844,389
Total contract liabilities	$ 1,154,357	$ 1,096,570

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Goodwill impairment charge	$ 0	$ 379,863	$ 0
Goodwill, not tax deductible and yielded permanent differences between book and taxable income		209,500
Goodwill impairment, tax benefit		49,400
Unrecognized tax benefits that would impact effective tax rate	8,700
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0	29,300
Credit carryforwards	1,400	6,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	196,500	184,800
Credit carryforwards	$ 2,000	$ 1,200

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Income Taxes (Summary of Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States operations									$ 138,426	$ (456,403)	$ 106,222
Foreign and U.S. territory operations									35,853	30,569	26,391
INCOME (LOSS) BEFORE INCOME TAXES	$ 53,212	$ 49,360	$ 40,435	$ 31,272	$ (106,717)	$ 32,312	$ (358,339)	$ 6,910	$ 174,279	$ (425,834)	$ 132,613

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Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current (benefit) expense:
Federal	$ (36,159)	$ (2,884)	$ 21,055
State	(1,282)	3,585	8,676
Foreign and U.S. territories	11,130	5,299	5,550
Total current (benefit) expense:	(26,311)	6,000	35,281
Deferred expense (benefit):
Federal	38,667	(43,579)	(1,773)
State	10,608	(27,566)	1,278
Foreign and U.S. territories	(1,022)	(464)	46
Total deferred expense (benefit):	48,253	(71,609)	(449)
Total expense (benefit):	$ 21,942	$ (65,609)	$ 34,832

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Income Taxes (Reconciliation of Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amount
Federal income tax expense (benefit) at statutory tax rate	$ 36,599	$ (89,425)	$ 27,849
State income taxes, net of federal tax benefit	8,518	(18,442)	9,011
Stock based compensation	3,185	1,706	0
Impact of federal tax law changes	(14,476)	0	211
Officers' compensation	2,486	2,938	3,078
Goodwill impairment	0	43,990	0
Noncontrolling interests	(9,799)	(6,064)	(3,232)
Federal R&D credits	(3,007)	(3,998)	(2,658)
Reversal of reserve for uncertain tax positions due to statute expirations	(489)	(773)	(1,958)
Foreign tax rate differences	1,491	4,940	(19)
Other	(2,566)	(481)	2,550
Total expense (benefit):	$ 21,942	$ (65,609)	$ 34,832
Rate
Federal income tax expense (benefit) at statutory tax rate	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit	4.90%	4.30%	6.80%
Stock based compensation	1.80%	(0.40%)	0.00%
Impact of federal tax law changes	(8.30%)	0.00%	0.20%
Officers' compensation	1.40%	(0.70%)	2.30%
Goodwill impairment	0.00%	(10.30%)	0.00%
Noncontrolling interests	(5.60%)	1.40%	(2.40%)
Federal R&D credits	(1.70%)	0.90%	(2.00%)
Reversal of reserve for uncertain tax positions due to statute expirations	(0.30%)	0.20%	(1.50%)
Foreign tax rate differences	0.90%	(1.20%)	0.00%
Other	(1.50%)	0.20%	1.90%
Income tax expense (benefit)	12.60%	15.40%	26.30%

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Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Timing of expense recognition	$ 24,470	$ 44,761
Net operating losses	19,968	23,711
Goodwill	19,315	26,658
Other, net	10,155	17,098
Deferred tax assets	73,908	112,228
Valuation allowance	0	(2,212)
Net deferred tax assets	73,908	110,016
Deferred tax liabilities:
Intangible assets, due primarily to purchase accounting	(15,212)	(15,309)
Fixed assets	(76,567)	(75,461)
Construction contract accounting	(9,769)	(13,464)
Joint ventures	(41,669)	(24,331)
Other	(11,962)	(16,567)
Deferred tax liabilities	(155,179)	(145,132)
Net deferred tax liabilities	(81,271)	(35,116)
Net Deferred Tax Liabilities
Deferred tax assets	1,695	570
Deferred tax liabilities	(82,966)	(35,686)
Net deferred tax liabilities	$ (81,271)	$ (35,116)

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Income Taxes (Reconciliation of Gross Unrecognized Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of gross unrecognized tax benefits
Beginning balance	$ 5,682	$ 4,998	$ 6,495
Change in tax positions of prior years	2,286	351
Change in tax positions of prior years				$ (302)
Change in tax positions of current year	1,202	1,106		763
Reduction in tax positions for statute expirations	(489)	(773)	(1,958)
Ending balance	$ 8,681	$ 5,682	$ 4,998	$ 6,495

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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment charge	$ 0	$ 379,863,000	$ 0
Impairment of intangible assets	0	0
Amortization expense	32,155,000	$ 6,226,000	$ 3,543,000
2021	32,400,000
2022	17,900,000
2023	2,500,000
2024	2,500,000
2025	2,500,000
Thereafter	$ 14,900,000

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Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Gross goodwill as of December 31, 2018			$ 1,072,991
Accumulated impairment as of December 31, 2018	$ (867,800)		(487,985)
Balance at beginning of period	205,143	$ 585,006
Goodwill impairment	0	(379,863)	0
Current year activity	0
Balance at end of period	205,143	205,143	585,006
Civil
Goodwill [Line Items]
Gross goodwill as of December 31, 2018			492,074
Accumulated impairment as of December 31, 2018			(76,716)
Balance at beginning of period	205,143	415,358
Goodwill impairment		(210,215)
Current year activity	0
Balance at end of period	205,143	205,143	415,358
Building
Goodwill [Line Items]
Gross goodwill as of December 31, 2018			424,724
Accumulated impairment as of December 31, 2018			(411,269)
Balance at beginning of period	0	13,455
Goodwill impairment		(13,455)
Current year activity	0
Balance at end of period	0	0	13,455
Specialty Contractors
Goodwill [Line Items]
Gross goodwill as of December 31, 2018			156,193
Accumulated impairment as of December 31, 2018			0
Balance at beginning of period	0	156,193
Goodwill impairment		(156,193)
Current year activity	0
Balance at end of period	$ 0	$ 0	$ 156,193

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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Total Intangible Assets [Abstract]
Cost	$ 387,040	$ 387,040
Accumulated Amortization	(150,858)	(118,703)
Accumulated Impairment Charge	(113,067)	(113,067)
Carrying Value	123,115	155,270
Trade Names
Finite-Lived intangible assets
Cost	74,350	74,350
Accumulated Amortization	(23,754)	(21,267)
Accumulated Impairment Charge	(23,232)	(23,232)
Carrying Value	$ 27,364	$ 29,851
Weighted-Average Amortization Period	20 years	20 years
Customer relationships
Finite-Lived intangible assets
Cost	$ 39,800	$ 39,800
Accumulated Amortization	(22,103)	(21,048)
Accumulated Impairment Charge	(16,645)	(16,645)
Carrying Value	$ 1,052	$ 2,107
Weighted-Average Amortization Period	12 years	12 years
Construction contract backlog
Finite-Lived intangible assets
Cost	$ 149,290	$ 149,290
Accumulated Amortization	(105,001)	(76,388)
Carrying Value	$ 44,289	$ 72,902
Weighted-Average Amortization Period	3 years	3 years
Trade Names
Indefinite-lived intangible assets
Cost	$ 117,600	$ 117,600
Accumulated Impairment Charge	(67,190)	(67,190)
Carrying Value	50,410	50,410
Contractor license
Indefinite-lived intangible assets
Cost	6,000	6,000
Accumulated Impairment Charge	$ (6,000)	$ (6,000)

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Financial Commitments (Narrative) (Details)		12 Months Ended
	Aug. 18, 2020 USD ($)	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022	Dec. 31, 2021 USD ($)	Aug. 19, 2020 USD ($)
Debt Instrument [Line Items]
Loan outstanding		$ 1,025,465,000	$ 834,476,000
Restricted cash held to repay outstanding debt		$ 69,900,000
Initial conversion rate		0.0330579
BMO Harris Bank
Debt Instrument [Line Items]
Increase in applicable margin on overdue amounts upon default	2.00%
Credit Facility 2020
Debt Instrument [Line Items]
Loan outstanding		$ 0
Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Net leverage ratio (maximum)	2.75
Weighted-average annual interest rate on borrowings		6.74%
Available borrowing capacity		$ 175,000,000
First Lien | BMO Harris Bank
Debt Instrument [Line Items]
Net leverage ratio (maximum)	1.35
Equity Component
Debt Instrument [Line Items]
Unamortized debt issuance costs		1,500,000
Liability Component
Debt Instrument [Line Items]
Unamortized debt issuance costs		5,100,000
Forecast | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Net leverage ratio (maximum)						2.25
Line of Credit | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 425,000,000.0
Premium percentage	1.00%
Initial principal amount installment percentage	0.25%
Unsecured Debt | BMO Harris Bank
Debt Instrument [Line Items]
Fixed charge coverage ratio (maximum)	2.00
Convertible Debt
Debt Instrument [Line Items]
Face amount		200,000,000
Loan outstanding		$ 67,878,000	182,292,000
Interest rate (as a percent)		2.875%
Repurchased face amount								$ 130,100,000
Aggregate repurchase price								$ 132,400,000
Conversion price (in dollars per share) | $ / shares		$ 30.25
Convertible Debt | Equity Component
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 1,543,000	1,543,000
Conversion feature		46,800,000	46,800,000
Convertible Debt | Liability Component
Debt Instrument [Line Items]
Unamortized debt issuance costs		5,051,000	5,051,000
Face amount		69,918,000	200,000,000
Issuance of convertible notes			153,200,000
2017 Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Loan outstanding		495,271,000	494,365,000
2017 Senior Notes | Private Placement | 2017 Senior Notes
Debt Instrument [Line Items]
Face amount		$ 500,000,000
Interest rate (as a percent)		6.875%
Redemption price, change of control triggering event (as a percent)		101.00%
Equipment Financing Loans
Debt Instrument [Line Items]
Loan outstanding		$ 36,900,000	27,700,000
Equipment Financing, Mortgages And Acquisition-Related Notes [Abstract]
Term of debt		7 years
Equipment Financing Loans | Forecast
Equipment Financing, Mortgages And Acquisition-Related Notes [Abstract]
Balloon payments					$ 6,300,000		$ 12,400,000
Mortgages
Debt Instrument [Line Items]
Loan outstanding		$ 10,700,000	11,500,000
Interest rate (as a percent)		3.50%
Equipment Financing, Mortgages And Acquisition-Related Notes [Abstract]
Term of debt		10 years
Mortgages | Forecast
Equipment Financing, Mortgages And Acquisition-Related Notes [Abstract]
Balloon payments				$ 6,800,000			$ 2,900,000
Minimum | Equipment Financing Loans
Debt Instrument [Line Items]
Interest rate (as a percent)		2.74%
Maximum | Equipment Financing Loans
Debt Instrument [Line Items]
Interest rate (as a percent)		3.89%
Credit Facility | Credit Facility 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 2,600,000
Credit Facility | 2017 Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs			3,700,000
Maximum borrowing capacity		$ 350,000,000
Weighted-average annual interest rate on borrowings		3.55%
Loan outstanding			$ 114,000,000
Credit Facility | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Increase in line of credit allowed amount	$ 173,500,000
Accordion feature percentage of LTM EBITDA	50.00%
Credit Facility | Line of Credit | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 175,000,000.0
Letters Of Credit | 2017 Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 150,000,000
Letters Of Credit | Line of Credit | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity	75,000,000.0
Bridge Loan | 2017 Credit Facility
Debt Instrument [Line Items]
Face amount		$ 10,000,000
Bridge Loan | Line of Credit | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 10,000,000.0
Secured Debt | Unsecured Debt | BMO Harris Bank | Junior Lien
Debt Instrument [Line Items]
Total net leverage ratio (maximum)	3.50
Federal Funds Rate | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	0.50%
LIBOR | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.75%
LIBOR | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	1.00%
LIBOR | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.75%
LIBOR | Mortgages
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))		3.00%
LIBOR | Minimum | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.25%
LIBOR | Minimum | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.50%
LIBOR | Maximum | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.75%
LIBOR | Maximum | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	4.75%
Base Rate | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.75%
Base Rate | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.75%
Base Rate | Minimum | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.25%
Base Rate | Minimum | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.50%
Base Rate | Maximum | Credit Facility 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.75%
Base Rate | Maximum | Term Loan B | BMO Harris Bank
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent))	3.75%

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Financial Commitments (Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 1,025,465	$ 834,476
Less: Current maturities	100,188	124,054
Long-term debt, net	925,277	710,422
Restricted cash held to repay outstanding debt	69,900
Convertible Debt
Debt Instrument [Line Items]
Total debt	67,878	182,292
Equipment financing and mortgages
Debt Instrument [Line Items]
Total debt	47,594	39,159
Other indebtedness
Debt Instrument [Line Items]
Total debt	6,264	4,660
Term Loan B
Debt Instrument [Line Items]
Total debt	408,458
2017 Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Total debt	495,271	494,365
2017 Credit Facility | Credit Facility
Debt Instrument [Line Items]
Total debt		$ 114,000
Credit Facility 2020
Debt Instrument [Line Items]
Total debt	$ 0

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Financial Commitments (Reconciliation Of Outstanding Debt Balance To Reported Debt Balance) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Outstanding Debt	$ 1,047,714
Unamortized Discounts and Issuance Costs	(22,249)
Total debt	1,025,465	$ 834,476
Convertible Debt
Debt Instrument [Line Items]
Outstanding Debt	69,918	200,000
Unamortized Discounts and Issuance Costs	(2,040)	(17,708)
Total debt	67,878	182,292
Term Loan B
Debt Instrument [Line Items]
Outstanding Debt	423,938
Unamortized Discounts and Issuance Costs	(15,480)
Total debt	408,458
2017 Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Outstanding Debt	500,000	500,000
Unamortized Discounts and Issuance Costs	(4,729)	(5,635)
Total debt	$ 495,271	$ 494,365

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Financial Commitments (Summary Of Information Related To The Liability And Equity Components Of The Convertible Notes) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Reacquisition of conversion option from repurchase of notes, net of tax	$ (764,000)	$ 0
Deferred taxes	(81,271,000)	(35,116,000)
Convertible Debt
Debt Instrument [Line Items]
Principal	200,000,000
Liability Component
Debt Instrument [Line Items]
Allocated debt issuance costs	(5,100,000)
Liability Component | Convertible Debt
Debt Instrument [Line Items]
Principal	69,918,000	200,000,000
Conversion feature	(46,800,000)	(46,800,000)
Allocated debt issuance costs	(5,051,000)	(5,051,000)
Amortization and extinguishment of discount and debt issuance costs (non-cash interest expense)	49,811,000	34,143,000
Net carrying amount	67,878,000	182,292,000
Equity Component
Debt Instrument [Line Items]
Allocated debt issuance costs	(1,500,000)
Equity Component | Convertible Debt
Debt Instrument [Line Items]
Allocated debt issuance costs	(1,543,000)	(1,543,000)
Net carrying amount	25,678,000	26,442,000
Conversion feature	46,800,000	46,800,000
Deferred taxes	$ (18,815,000)	$ (18,815,000)

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Financial Commitments (Principal Payments of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2021	$ 102,228
2022	14,822
2023	14,282
2024	7,498
2025	506,156
Thereafter	402,728
Subtotal	1,047,714
Unamortized Discounts and Issuance Costs	22,249
Total debt	$ 1,025,465	$ 834,476

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Financial Commitments (Summary Of Interest Expense As Reported In The Consolidated Statements of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other interest	$ 2,079	$ 2,172	$ 2,747
Cash portion of loss on extinguishment	786	0	0
Total cash interest expense	56,059	54,287	51,447
Total non-cash interest expense	20,153	13,207	12,072
Non-cash portion of loss on extinguishment	8,312	0	0
Total interest expense	76,212	67,494	63,519
Term Loan B
Interest on debt	9,028
Total non-cash interest expense	$ 784
Effective interest rates	6.49%
Convertible Debt
Interest on debt	$ 4,373	5,750	5,750
Total non-cash interest expense	$ 8,944	10,811	9,846
Effective interest rates	9.39%
2017 Senior Notes | 2017 Senior Notes
Interest on debt	$ 34,375	34,375	34,375
Total non-cash interest expense	$ 906	844	787
Effective interest rates	7.13%
Credit Facility 2020
Interest on debt	$ 77
Total non-cash interest expense	206
2017 Credit Facility | Credit Facility
Interest on debt	5,341	11,990	8,575
Total non-cash interest expense	$ 1,001	$ 1,552	$ 1,439

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Commitments and Contingencies (Details) - USD ($) $ in Millions				1 Months Ended			3 Months Ended	12 Months Ended
	Dec. 13, 2019	Jun. 04, 2019	Feb. 26, 2015	Sep. 30, 2018	Mar. 31, 2016	Aug. 31, 2013	Dec. 31, 2019	Dec. 31, 2020	Jul. 02, 2018	Mar. 31, 2018
Alaskan Way Viaduct Matter
Contingencies and Commitments
Ownership percentage in joint venture								45.00%
Value of claim filed				$ 532.0	$ 57.2
Value of counterclaim filed					$ 667.0
Settlement on judgment, awarded to other party	$ 57.2
Pre-tax charge, impact from jury verdict							$ 166.8
Pre-tax accrual, impact from jury verdict							25.7
Settlement on judgment							$ 57.2
George Washington Bridge Bus Station Matter
Contingencies and Commitments
Value of claim filed			$ 30.0
Value of project						$ 100.0
Value of counterclaim filed in excess of										$ 113.0
Court issued writ of attachment amount		$ 23.0
Proof of claim amount	$ 113.0
Value of damages seeking									$ 113.0
Return Of Retainage By Developer | George Washington Bridge Bus Station Matter
Contingencies and Commitments
Value of counterclaim filed in excess of										$ 29.0

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Leases (Narrative) (Details)	Dec. 31, 2020
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	18 years

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Leases (Components of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 14,547	$ 15,854
Short-term lease expense	87,969	72,562
Lease expense, gross	102,516	88,416
Less: Sublease income	1,026	1,077
Total lease expense	$ 101,490	$ 87,339
Minimum
Lessee, Lease, Description [Line Items]
Short term lease, lease term	1 month
Maximum
Lessee, Lease, Description [Line Items]
Short term lease, lease term	1 year

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Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
ROU assets	$ 55,897	$ 40,156
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Current lease liabilities	$ 7,661	$ 11,392
Long-term lease liabilities	51,336	31,900
Total lease liabilities	$ 58,997	$ 43,292
Weighted-average remaining lease term	12 years 6 months	5 years
Weighted-average discount rate	9.22%	5.96%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent

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Leases (Supplemental Cash Flow And Other Information Related To Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ (14,591)	$ (15,658)
ROU assets obtained in exchange for lease liabilities	$ 29,244	$ 9,784

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Leases (Maturity of Leases Liabilities on an Undiscounted Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021	$ 12,512
2022	10,528
2023	7,723
2024	6,141
2025	5,354
Thereafter	65,633
Total lease payments	107,891
Less: Imputed interest	48,894
Total	$ 58,997	$ 43,292

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Share-Based Compensation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant	1,539,172
Number of vested and exercisable stock options (in shares)	1,715,265
Stock options exercised, intrinsic value	$ 900,000
Vested and exercisable stock options, weighted average exercise price (in dollars per share)	$ 20.43
Weighted average remaining contractual term of outstanding stock options	3 years 6 months
Share-based compensation expense	$ 11,833,000	$ 19,143,000	$ 22,782,000
Share based compensation, tax benefits	1,300,000	2,900,000	3,800,000
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	10,200,000	17,500,000	21,100,000
Non-employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,600,000	$ 1,600,000	$ 1,700,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration period	10 years
Stock option expense	$ 2,300,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	2 years
Total granted and outstanding (in shares)	2,275,265	2,279,015	2,943,044	2,554,034
Aggregate Intrinsic value	$ 900,000
Weighted average remaining contractual term of outstanding stock options	4 years 7 months 6 days
Stock options granted but not vested (in shares)	560,000
Stock options granted, weighted-average exercise price (in dollars per share)	$ 19.21
Stock options granted, weighted-average remaining contractual life	8 years 1 month 6 days
Stock options granted and expected to vest (in shares)	328,125
Stock options granted and not expected to vest (in shares)	231,875
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units with guaranteed minimum payouts outstanding (in shares)	1,035,000	1,715,000	1,469,000	1,397,984
Stock units with guaranteed minimum payouts outstanding, weighted-average grant date fair value (in dollars per share)	$ 21.85	$ 25.19	$ 27.27	$ 30.11
Fair value of restricted stock units that vested during period	$ 4,100,000	$ 3,100,000	$ 7,900,000
Restricted stock expense	$ 9,000,000.0
Weighted average period over which unrecognized compensation cost is expected to be recognized	2 years
Unrestricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of unrestricted stock units issued	$ 1,700,000	$ 1,500,000	2,500,000
Restricted Stock Units, Guaranteed Minimum Payouts
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units with guaranteed minimum payouts outstanding (in shares)	270,000	390,000
Stock units with guaranteed minimum payouts outstanding, weighted-average grant date fair value (in dollars per share)	$ 27.80	$ 27.89
Stock units with guaranteed minimum payouts outstanding, recognized liabilities	$ 2,400,000	$ 2,900,000
Paid to settle share-based awards	$ 300,000	$ 0	$ 0
Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan (“Incentive Plan”) | Restricted Stock Units And Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares outstanding, historical awards that either have not vested or have vested but not exercised	3,310,265

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Share-Based Compensation (Summary of Restricted Stock Unit and Stock Option Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options Number of Shares
Granted (in shares)	165,000	220,000	664,000
Vested/exercised (in shares)	0	0
Stock Options Weighted Average Exercise/(Strike) Price Per Share
Vested/exercised, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)	$ 0	$ 0
Restricted Stock Units
RSUs Number of Shares
Outstanding, beginning of period (in shares)	1,715,000	1,469,000	1,397,984
Units granted (in shares)	245,000	530,000	699,000
Expired or cancelled (in shares)	(403,750)	(104,029)	(240,289)
Vested/exercised (in shares)	(521,250)	(179,971)	(387,695)
Outstanding, end of period (in shares)	1,035,000	1,715,000	1,469,000
RSUs Weighted Average Grant Date Fair Value
Outstanding, beginning of period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 25.19	$ 27.27	$ 30.11
Units granted (in dollars per share)	20.67	20.23	24.21
Expired or cancelled, Weighted Average Grant Date Fair Value (in dollars per share)	25.52	28.98	32.76
Vested/exercised, Weighted Average Grant Date Fair Value (in dollars per share)	29.44	25.39	28.67
Outstanding, end of period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 21.85	$ 25.19	$ 27.27
Stock Options
Stock Options Number of Shares
Outstanding, beginning of period (in shares)	2,279,015	2,943,044	2,554,034
Granted (in shares)	165,000	220,000	664,000
Expired or cancelled (in shares)	(168,750)	(884,029)	(274,990)
Vested/exercised (in shares)			0
Outstanding, end of period (in shares)	2,275,265	2,279,015	2,943,044
Stock Options Weighted Average Exercise/(Strike) Price Per Share
Outstanding, beginning of period, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)	$ 20.62	$ 20.89	$ 20.45
Granted, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)	19.24	19.66	23.20
Expired or cancelled, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)	25.87	21.03	22.82
Vested/exercised, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)			0
Outstanding, end of period, Weighted Average Exercise/(Strike) Price Per Share (in dollars per share)	$ 20.13	$ 20.62	$ 20.89

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Share-Based Compensation (Summary Of Unrestricted Stock Units Issuance) (Details) - Unrestricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Units granted (in shares)	194,177	98,591	115,420
Units granted (in dollars per share)	$ 8.60	$ 15.72	$ 21.26

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Share-Based Compensation (Weighted-Average Assumptions Used in Estimating Grant Date Fair Values of Stock Option Awards) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Key assumptions used in estimating the grant date fair values of stock option awards granted
Total stock options granted	165,000	220,000	664,000
Stock Options
Key assumptions used in estimating the grant date fair values of stock option awards granted
Total stock options granted	165,000	220,000	664,000
Weighted-average grant date fair value (in dollars per share)	$ 7.67	$ 7.59	$ 11.09
Risk-free rate (as a percent)	1.20%	2.10%	2.60%
Expected life of options	6 years 3 months 18 days	6 years 1 month 6 days	5 years 9 months 18 days
Expected volatility (as a percent)	60.70%	39.40%	42.20%
Expected quarterly dividends	$ 0	$ 0	$ 0

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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan Assets
Expected contributions to the defined benefit pension plan in 2020	$ 4.0
Net actuarial loss	65.2	$ 56.5
Expense provision for 401 (k) plans	4.3	4.1	$ 4.2
Company Contributions	46.8	36.5	$ 36.6
Hedge fund investments
Pension Plan Assets
Investments in hedge funds which do not have readily determinable fair values	$ 10.6	$ 13.5
Employee Pension Plans
Pension Plan Assets
Discount rate (as a percent)	2.20%	3.10%
Expected return on assets (as a percent)	5.75%	5.75%	6.00%

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Employee Benefit Plans (Summary of Net Periodic Benefit Cost) (Details) - Employee Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of net periodic benefit cost
Interest cost	$ 3,032	$ 3,801	$ 3,496
Service cost	925	900	875
Expected return on plan assets	(4,022)	(4,170)	(4,302)
Recognized net actuarial losses	2,407	1,933	2,067
Net periodic benefit cost	$ 2,342	$ 2,464	$ 2,136
Actuarial assumptions used to determine net cost:
Discount rate (as a percent)	3.07%	4.12%	3.45%
Expected return on assets (as a percent)	5.75%	5.75%	6.00%

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Employee Benefit Plans (Target and Actual Asset Allocation for Pension Plan by Asset Category) (Details) - Employee Pension Plans	Dec. 31, 2020	Dec. 31, 2019
Pension Plan Assets
Target asset allocation (as a percent)	100.00%
Actual asset allocation (as a percent)	100.00%	100.00%
Cash
Pension Plan Assets
Target asset allocation (as a percent)	5.00%
Actual asset allocation (as a percent)	5.00%	4.00%
Domestic Equity Funds
Pension Plan Assets
Target asset allocation (as a percent)	35.00%
Actual asset allocation (as a percent)	34.00%	47.00%
International Equity Funds
Pension Plan Assets
Target asset allocation (as a percent)	15.00%
Actual asset allocation (as a percent)	17.00%	18.00%
Fixed income funds
Pension Plan Assets
Target asset allocation (as a percent)	45.00%
Actual asset allocation (as a percent)	44.00%	31.00%

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Employee Benefit Plans (Future Benefit Payments Under Defined Benefit Pension Plan) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Future Benefit Payments
2021	$ 6,800
2022	6,746
2023	6,657
2024	6,617
2025	6,526
2026-2030	30,704
Total future benefit payments	$ 64,050

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Employee Benefit Plans (Reconciliation of Changes in Fair Value of Plan Assets, Plan Benefit Obligations and Funded Status) (Details) - Employee Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in Fair Value of Plan Assets
Balance at beginning of year	$ 73,357	$ 63,109
Actual return on plan assets	899	12,123
Company contribution	4,408	4,793
Benefit payments	(6,724)	(6,668)
Balance at end of year	71,940	73,357	$ 63,109
Change in Benefit Obligations
Balance at beginning of year	102,607	95,869
Interest cost	3,032	3,801	3,496
Service cost	925	900	875
Assumption change loss	7,902	8,373
Actuarial loss	81	332
Benefit payments	(6,723)	(6,668)
Balance at end of year	$ 107,824	$ 102,607	$ 95,869

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Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - Employee Pension Plans - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Funded Status
Funded status	$ (35,884)	$ (29,250)
Net unfunded amounts recognized in Consolidated Balance Sheets consist of:
Current liabilities	(293)	(279)
Long-term liabilities	(35,591)	(28,971)
Total net unfunded amount recognized in Consolidated Balance Sheets	$ (35,884)	$ (29,250)

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Employee Benefit Plans (Plan Assets at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity partnerships
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List]	us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember	us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember
Hedge fund investments
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List]	us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember	us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember
Employee Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	$ 71,940	$ 73,357	$ 63,109
Employee Pension Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	58,253	56,952
Employee Pension Plans | Level 1 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	58,253	56,952
Employee Pension Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	3,086	2,861
Employee Pension Plans | Level 2 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	3,086	2,861
Employee Pension Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Level 3 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	61,339	59,813
Employee Pension Plans | Fair Value Measured at Net Asset Value Per Share | Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	10,601	13,544
Employee Pension Plans | Cash and cash equivalents | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	1,582	2,867
Employee Pension Plans | Cash and cash equivalents | Level 1 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	1,582	2,867
Employee Pension Plans | Cash and cash equivalents | Level 2 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Cash and cash equivalents | Level 3 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Fixed income funds | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	5,086	2,861
Employee Pension Plans | Fixed income funds | Level 1 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	2,000	0
Employee Pension Plans | Fixed income funds | Level 2 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	3,086	2,861
Employee Pension Plans | Fixed income funds | Level 3 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Mutual funds | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	54,671	54,085
Employee Pension Plans | Mutual funds | Level 1 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	54,671	54,085
Employee Pension Plans | Mutual funds | Level 2 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Mutual funds | Level 3 | Non-Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	0	0
Employee Pension Plans | Equity partnerships | Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	3,700	3,660
Employee Pension Plans | Hedge fund investments | Closely Held Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans' assets	$ 6,901	$ 9,884

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Employee Benefit Plans (Benefit Obligations in Excess of the Fair Value of Plan's Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 107,824	$ 102,607	$ 95,869
Accumulated benefit obligation	107,824	102,607
Fair value of plans' assets	71,940	73,357	$ 63,109
Projected benefit obligation greater than fair value of plans' assets	35,884	29,250
Accumulated benefit obligation greater than fair value of plans' assets	35,884	29,250
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	104,657	99,515
Accumulated benefit obligation	104,657	99,515
Fair value of plans' assets	71,940	73,357
Projected benefit obligation greater than fair value of plans' assets	32,717	26,158
Accumulated benefit obligation greater than fair value of plans' assets	32,717	26,158
Benefit Equalization Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3,167	3,092
Accumulated benefit obligation	3,167	3,092
Fair value of plans' assets	0	0
Projected benefit obligation greater than fair value of plans' assets	3,167	3,092
Accumulated benefit obligation greater than fair value of plans' assets	$ 3,167	$ 3,092

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Employee Benefit Plans (Summary of Key Information for the Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Multiemployer Plans [Line Items]
Company Contributions	$ 46.8	$ 36.5	$ 36.6
The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
FIP/RP Status Pending Or Implemented	NA
Company Contributions	$ 10.1	$ 9.3	12.2
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Apr. 13, 2022
Excavators Union Local 731 Pension Fund
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
FIP/RP Status Pending Or Implemented	NA
Company Contributions	$ 4.8	$ 5.1	4.1
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Apr. 30, 2022
Carpenters Pension Trust Fund for Northern California
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Red	Red
FIP/RP Status Pending Or Implemented	Implemented
Company Contributions	$ 4.6	$ 4.0	4.9
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Jun. 30, 2023
Northern California Electrical Workers Pension Plan
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
FIP/RP Status Pending Or Implemented	NA
Company Contributions	$ 3.5	$ 3.0	$ 4.1
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	May 31, 2022
Laborers Pension Trust Fund For Northern California
Multiemployer Plans [Line Items]
FIP/RP Status Pending Or Implemented	NA
Steamfitters Industry Pension Fund
Multiemployer Plans [Line Items]
FIP/RP Status Pending Or Implemented	NA

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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2020
Civil Segment Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Additional ownership percentage in joint venture		25.00%
Ownership percentage in joint venture	75.00%	50.00%
Noncontrolling interest, ownership percentage by noncontrolling owners		25.00%
Construction contract backlog | Civil Segment Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets acquired		$ 75.6
Joint Venture | Civil Segment Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of investments		3.2
Fair Value, Nonrecurring | Civil Segment Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on remeasurement		37.8
2017 Senior Notes | 2017 Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		485.0	$ 495.0
Term Loan B
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value			425.0
Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		$ 193.4	$ 69.1

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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Municipal Bonds
Assets:
Investments in lieu of retainage	$ 1,300	$ 1,200
Fair Value, Measurements, Recurring
Assets:
Cash and cash equivalents	374,289	193,685
Restricted cash	77,563	8,416
Restricted investments	78,912	70,974
Investments in lieu of retainage	93,909	90,791
Total	624,673	363,866
Fair Value, Measurements, Recurring | Level 1
Assets:
Cash and cash equivalents	374,289	193,685
Restricted cash	77,563	8,416
Restricted investments	0	0
Investments in lieu of retainage	92,609	89,572
Total	544,461	291,673
Fair Value, Measurements, Recurring | Level 2
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Restricted investments	78,912	70,974
Investments in lieu of retainage	1,300	1,219
Total	80,212	72,193
Fair Value, Measurements, Recurring | Level 3
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Restricted investments	0	0
Investments in lieu of retainage	0	0
Total	$ 0	$ 0
Maximum
Assets:
Restricted investment maturity period	5 years	5 years
Corporate Debt Securities
Assets:
Restricted and other investments	$ 37,500	$ 35,800
US Government Agencies Securities
Assets:
Restricted and other investments	40,500	33,800
Certificates of Deposit
Assets:
Restricted and other investments	900	1,400
Money Market Funds
Assets:
Investments in lieu of retainage	$ 92,600	$ 89,600

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Variable Interest Entities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets	$ 4,080,457				$ 3,510,986				$ 4,080,457	$ 3,510,986
Current liabilities	2,264,363				2,109,856				2,264,363	2,109,856
REVENUE	1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	4,450,832	$ 4,454,662
O&G
Ownership percentage in joint venture									75.00%
Related party ownership percentage in joint venture									25.00%
Purple Line Expansion Section 2 And Section 3 | O&G
REVENUE									$ 2,800,000
Purple Line Segment 2 Expansion Project | O&G
Ownership percentage in joint venture									75.00%
Related party ownership percentage in joint venture									25.00%
Parsons Corporation [Member] | Newark Liberty International Airport Terminal One Project
Ownership percentage in joint venture									80.00%
Variable interest ownership percentage in joint venture									20.00%
Parsons Corporation [Member] | Newark Liberty International Airport Terminal One Project | Scenario, Plan
REVENUE									$ 1,400,000
Variable Interest Entity, Not Primary Beneficiary
Current assets	600				1,500				600	1,500
Current liabilities	500				1,400				500	1,400
Variable Interest Entity, Primary Beneficiary
Current assets	405,700				365,000				405,700	365,000
Current liabilities	514,900				556,100				514,900	556,100
Noncurrent assets	$ 14,200				$ 52,000				$ 14,200	$ 52,000

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Business Segments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 segment
Segment Reporting [Abstract]
Number of reportable segments	3

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Business Segments (Reportable Segments) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Segments
Revenue	$ 1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	$ 1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	$ 4,450,832	$ 4,454,662
Income from construction operations	$ 74,400	$ 83,021	$ 57,696	$ 47,227	$ (94,146)	$ 47,943	$ (341,717)	$ 22,913	262,344	(365,007)	191,876
Capital expenditures									54,781	84,196	77,069
Depreciation and amortization									107,034	65,044	47,267
Goodwill impairment charge									0	379,863	0
Goodwill impairment charge, after tax										$ 330,500
Goodwill impairment charge, after tax, diluted (in dollars per share)										$ 6.58
Operating Segments
Business Segments
Revenue									5,814,687	$ 4,748,588	4,684,004
Income from construction operations									316,196	(299,819)	255,625
Capital expenditures									53,839	83,362	76,298
Depreciation and amortization									95,936	53,975	35,999
Corporate, Non-Segment
Business Segments
Income from construction operations									(53,852)	(65,188)	(63,749)
Capital expenditures									942	834	771
Depreciation and amortization									11,098	11,069	11,268
Intersegment Eliminations
Business Segments
Revenue									(495,924)	(297,756)	(229,342)
Civil
Business Segments
Revenue									2,199,899	1,779,352	1,586,093
Loss contingency										37,800
Loss contingency, after tax										$ 27,100
Loss contingency, after tax, diluted (in dollars per share)										$ 0.54
Goodwill impairment charge										$ 210,215
Civil | Adverse Arbitration Ruling Pertaining To Subcontract Project In New York
Business Segments
Loss contingency											17,800
Loss contingency, after tax											$ 12,800
Loss contingency, after tax, diluted (in dollars per share)											$ 0.25
Civil | Alaskan Way Viaduct Matter
Business Segments
Loss contingency										166,800
Loss contingency, after tax										$ 119,400
Loss contingency, after tax, diluted (in dollars per share)										$ 2.38
Civil | Operating Segments
Business Segments
Revenue									2,565,210	$ 2,054,097	$ 1,810,232
Income from construction operations									245,835	(150,837)	168,256
Capital expenditures									51,044	82,156	73,866
Depreciation and amortization									90,250	47,905	29,685
Civil | Intersegment Eliminations
Business Segments
Revenue									(365,311)	(274,745)	(224,139)
Building
Business Segments
Revenue									1,984,641	1,742,040	1,861,699
Goodwill impairment charge										13,455
Building | Operating Segments
Business Segments
Revenue									2,114,459	1,764,753	1,866,902
Income from construction operations									53,158	23,655	43,939
Capital expenditures									878	518	1,655
Depreciation and amortization									1,703	1,934	1,956
Building | Intersegment Eliminations
Business Segments
Revenue									(129,818)	(22,713)	(5,203)
Specialty Contractors
Business Segments
Revenue									1,134,223	929,440	1,006,870
Goodwill impairment charge										156,193
Specialty Contractors | Unfavorable Legal Ruling Pertaining To Mechanical Project In California
Business Segments
Loss contingency									15,200
Loss contingency, after tax									$ 11,000
Loss contingency, after tax, diluted (in dollars per share)									$ 0.22
Specialty Contractors | Adverse Arbitration Ruling Pertaining To Electrical Project In New York
Business Segments
Loss contingency									$ 13,200
Loss contingency, after tax									$ 9,600
Loss contingency, after tax, diluted (in dollars per share)									$ 0.19
Specialty Contractors | Favorable Arbitration Decision
Business Segments
Loss contingency									$ 25,700
Loss contingency, after tax									$ 18,600
Loss contingency, after tax, diluted (in dollars per share)									$ 0.36
Specialty Contractors | Operating Segments
Business Segments
Revenue									$ 1,135,018	929,738	1,006,870
Income from construction operations									17,203	(172,637)	43,430
Capital expenditures									1,917	688	777
Depreciation and amortization									3,983	4,136	4,358
Specialty Contractors | Intersegment Eliminations
Business Segments
Revenue									$ (795)	$ (298)	$ 0

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Business Segments (Reconciliation of Segment Results to Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets	$ 5,045,617	$ 4,485,777
Corporate, Non-Segment
Assets	82,086	63,897
Civil | Operating Segments
Assets	3,141,991	2,791,402
Building | Operating Segments
Assets	1,147,649	995,298
Specialty Contractors | Operating Segments
Assets	$ 673,891	$ 635,180

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Business Segments (Principal Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Principal Geographical Areas Information
Revenue	$ 1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	$ 1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	$ 4,450,832	$ 4,454,662
Assets	5,045,617				4,485,777				5,045,617	4,485,777
United States
Principal Geographical Areas Information
Revenue									4,953,045	4,073,691	4,180,206
Assets	4,836,735				4,271,722				4,836,735	4,271,722
Foreign and U.S. Territories
Principal Geographical Areas Information
Revenue									365,718	377,141	$ 274,456
Assets	$ 208,882				$ 214,055				$ 208,882	$ 214,055

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Business Segments Reconciliation of Segment Information to Consolidated Amounts (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Income from construction operations	$ 74,400	$ 83,021	$ 57,696	$ 47,227	$ (94,146)	$ 47,943	$ (341,717)	$ 22,913	$ 262,344	$ (365,007)	$ 191,876
Other income (expense)									(11,853)	6,667	4,256
Interest expense									(76,212)	(67,494)	(63,519)
Income (loss) before income taxes	$ 53,212	$ 49,360	$ 40,435	$ 31,272	$ (106,717)	$ 32,312	$ (358,339)	$ 6,910	$ 174,279	$ (425,834)	$ 132,613

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Related Party Transactions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) project	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Related party transactions
Expenses incurred with related party	$ 3.2	$ 3.2	$ 3.2
Chairman and Chief Executive Officer
Related party transactions
Related party, payment for leases	$ 3.2	3.1	3.0
O&G
Related party transactions
Ownership percentage in joint venture	75.00%
Related party ownership percentage in joint venture	25.00%
O&G | Project In Los Angeles, California
Related party transactions
Number of construction projects | project	2
Alliant
Related party transactions
Insurance expense	$ 16.0	18.4	$ 14.7
Owed to related party	$ 2.7	$ 2.7

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Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 1,349,516	$ 1,442,091	$ 1,276,427	$ 1,250,729	$ 1,177,725	$ 1,189,345	$ 1,125,275	$ 958,487	$ 5,318,763	$ 4,450,832	$ 4,454,662
Gross profit	132,404	124,915	117,754	111,080	(62,704)	115,063	100,943	88,470	486,153	241,772	454,453
Income from construction operations	74,400	83,021	57,696	47,227	(94,146)	47,943	(341,717)	22,913	262,344	(365,007)	191,876
Income before income taxes	53,212	49,360	40,435	31,272	(106,717)	32,312	(358,339)	6,910	174,279	(425,834)	132,613
Net income (loss)	46,017	49,323	30,859	26,138	(76,229)	26,721	(315,439)	4,722	152,337	(360,225)	97,781
Net income (loss) attributable to Tutor Perini Corporation	$ 35,495	$ 36,819	$ 18,709	$ 17,371	$ (86,117)	$ 19,313	$ (320,530)	$ (356)	$ 108,394	$ (387,690)	$ 83,436
Earnings per common share:
Basic (in dollars per share)	$ 0.70	$ 0.72	$ 0.37	$ 0.35	$ (1.71)	$ 0.38	$ (6.38)	$ (0.01)	$ 2.14	$ (7.72)	$ 1.67
Diluted (in dollars per share)	$ 0.69	$ 0.72	$ 0.37	$ 0.34	$ (1.71)	$ 0.38	$ (6.38)	$ (0.01)	$ 2.12	$ (7.72)	$ 1.66