Tutor Perini (TPC) 10-Q 6 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	Tutor Perini Corporation
Entity Central Index Key	0000077543
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Quarterly Report	true
Document Transition Report	false
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	MA
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		50,278,816
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Title of 12(b) Security	Common Stock, $1.00 par value
Trading Symbol	TPC
Security Exchange Name	NYSE
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
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	91342-1093
Entity File Number	1-6314
Entity Tax Identification Number	04-1717070
City Area Code	818
Local Phone Number	362-8391

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUE	$ 1,189,345	$ 1,123,137	$ 3,273,107	$ 3,271,378
COST OF OPERATIONS	(1,074,282)	(1,012,013)	(2,968,631)	(2,974,546)
GROSS PROFIT	115,063	111,124	304,476	296,832
General and administrative expenses	(67,120)	(63,818)	(195,474)	(195,636)
Goodwill impairment	0	0	(379,863)	0
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	47,943	47,306	(270,861)	101,196
Other income, net	1,674	1,909	2,996	3,739
Interest expense	(17,305)	(16,411)	(51,252)	(47,474)
INCOME (LOSS) BEFORE INCOME TAXES	32,312	32,804	(319,117)	57,461
Income tax (expense) benefit	(5,591)	(7,368)	35,121	(15,071)
NET INCOME (LOSS)	26,721	25,436	(283,996)	42,390
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	7,408	4,164	17,577	8,359
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 19,313	$ 21,272	$ (301,573)	$ 34,031
BASIC EARNINGS (LOSS) PER COMMON SHARE	$ 0.38	$ 0.43	$ (6.01)	$ 0.68
DILUTED EARNINGS (LOSS) PER COMMON SHARE	$ 0.38	$ 0.42	$ (6.01)	$ 0.68
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	50,279	50,018	50,201	49,927
DILUTED (in shares)	50,582	50,375	50,201	50,210

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
NET INCOME (LOSS)	$ 26,721	$ 25,436	$ (283,996)	$ 42,390
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	331	365	992	1,100
Foreign currency translation adjustments	(450)	376	708	(1,432)
Unrealized gain (loss) in fair value of investments	256	(129)	1,615	(1,143)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	137	612	3,315	(1,475)
COMPREHENSIVE INCOME (LOSS)	26,858	26,048	(280,681)	40,915
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	7,309	4,164	17,737	8,359
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 19,549	$ 21,884	$ (298,418)	$ 32,556

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents ($110,447 and $43,131 related to variable interest entities ("VIEs"))	$ 207,130	$ 116,075
Restricted cash	6,261	3,788
Restricted investments	67,728	58,142
Accounts receivable ($142,749 and $62,482 related to VIEs)	1,460,450	1,261,072
Retainage receivable ($73,424 and $36,724 related to VIEs)	542,274	478,744
Costs and estimated earnings in excess of billings	1,159,333	1,142,295
Other current assets ($36,859 and $30,185 related to VIEs)	162,406	115,527
Total current assets	3,605,582	3,175,643
PROPERTY AND EQUIPMENT ("P&E"), net of accumulated depreciation of $375,717 and $343,735 (net P&E of $54,729 and $51,508 related to VIEs)	509,986	490,669
GOODWILL	205,143	585,006
INTANGIBLE ASSETS, NET	83,254	85,911
OTHER ASSETS	90,943	50,523
TOTAL ASSETS	4,494,908	4,387,752
CURRENT LIABILITIES:
Current maturities of long-term debt	10,862	16,767
Accounts payable ($74,183 and $18,070 related to VIEs)	670,458	621,728
Retainage payable ($10,294 and $0 related to VIEs)	232,209	211,956
Billings in excess of costs and estimated earnings ($404,357 and $263,764 related to VIEs)	818,806	573,190
Accrued expenses and other current liabilities ($37,935 and $34,828 related to VIEs)	188,373	174,325
Total current liabilities	1,920,708	1,597,966
LONG-TERM DEBT, less current maturities, net of unamortized discounts and debt issuance costs totaling $26,358 and $34,998	825,382	744,737
DEFERRED INCOME TAXES	58,305	105,521
OTHER LONG-TERM LIABILITIES	186,965	151,639
TOTAL LIABILITIES	2,991,360	2,599,863
COMMITMENTS AND CONTINGENCIES (NOTE 11)
Stockholders' equity:
Preferred stock - authorized 1,000,000 shares ($1 par value), none issued
Common stock - authorized 75,000,000 shares ($1 par value), issued and outstanding 50,278,816 and 50,025,996 shares	50,279	50,026
Additional paid-in capital	1,113,987	1,102,919
Retained earnings	400,108	701,681
Accumulated other comprehensive loss	(42,294)	(45,449)
Total stockholders' equity	1,522,080	1,809,177
Noncontrolling interests	(18,532)	(21,288)
TOTAL EQUITY	1,503,548	1,787,889
TOTAL LIABILITIES AND EQUITY	$ 4,494,908	$ 4,387,752

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 207,130	$ 116,075
Accounts receivable	1,460,450	1,261,072
Retainage receivable	542,274	478,744
Other current assets	162,406	115,527
Accumulated depreciation	375,717	343,735
PROPERTY AND EQUIPMENT, net of accumulated depreciation	509,986	490,669
Accounts payable	670,458	621,728
Retainage payable	232,209	211,956
Accrued expenses and other current liabilities	188,373	174,325
Billings in excess of costs and estimated earnings	818,806	573,190
Unamortized discounts and debt issuance costs	$ 26,358	$ 34,998
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares issued	0	0
Common stock, shares authorized	75,000,000	75,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued	50,278,816	50,025,996
Common stock, shares outstanding	50,278,816	50,025,996
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents	$ 110,447	$ 43,131
Accounts receivable	142,749	62,482
Retainage receivable	73,424	36,724
Other current assets	36,859	30,185
PROPERTY AND EQUIPMENT, net of accumulated depreciation	54,729	51,508
Accounts payable	74,183	18,070
Retainage payable	10,294	0
Accrued expenses and other current liabilities	37,935	34,828
Billings in excess of costs and estimated earnings	$ 404,357	$ 263,764

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities:
Net income (loss)	$ (283,996)	$ 42,390
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Goodwill impairment	379,863	0
Depreciation	41,884	30,924
Amortization of intangible assets	2,657	2,657
Share-based compensation expense	14,331	17,779
Change in debt discounts and deferred debt issuance costs	9,790	8,962
Deferred income taxes	(48,318)	233
(Gain) loss on sale of property and equipment	(1,799)	823
Changes in other components of working capital	(7,148)	(136,113)
Other long-term liabilities	3,979	(2,606)
Other,net	122	190
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	111,365	(34,761)
Cash Flows from Investing Activities:
Acquisition of property and equipment	(62,677)	(64,411)
Proceeds from sale of property and equipment	4,300	5,462
Investment in securities	(18,790)	(13,841)
Proceeds from maturities and sales of investments in securities	11,078	14,302
NET CASH USED IN INVESTING ACTIVITIES	(66,089)	(58,488)
Cash Flows from Financing Activities:
Proceeds from debt	649,139	1,502,177
Repayment of debt	(583,039)	(1,444,760)
Business acquisition related payment	0	(15,951)
Cash payments related to share-based compensation	(2,363)	(2,671)
Distributions paid to noncontrolling interests	(21,500)	(22,500)
Contributions from noncontrolling interests	6,519	1,000
Debt modification costs	(504)	0
NET CASH PROVIDED BY FINANCING ACTIVITIES	48,252	17,295
Net increase (decrease) in cash, cash equivalents and restricted cash	93,528	(75,954)
Cash, cash equivalents and restricted cash at beginning of period	119,863	197,648
Cash, cash equivalents and restricted cash at end of period	$ 213,391	$ 121,694

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Basis of Presentation [Abstract]
Basis of Presentation	(1) Basis of Presentation The Condensed Consolidated Financial Statements do not include footnotes and certain financial information normally presented annually under generally accepted accounting principles in the United States (“GAAP”). Therefore, they should be read in conjunction with the audited consolidated financial statements and the related notes included in Tutor Perini Corporation’s (the “Company”) Annual Report on Form 10-K for the year ended December 31, 2018. The results of operations for the three and nine months ended September 30, 2019 may not be indicative of the results that will be achieved for the full year ending December 31, 2019 . In the opinion of management, the accompanying unaudited Condensed Consolidated Financial Statements reflect all adjustments, including those of a normal recurring nature, necessary to present fairly the Company’s consolidated financial position as of September 30, 2019 and its consolidated statements of operations and cash flows for the interim periods presented. Intercompany balances and transactions have been eliminated.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	(2) Recent Accounting Pronouncements New accounting pronouncements adopted by the Company during the nine months ended September 30, 2019 are discussed below. In August 2018, the Securities and Exchange Commission (“SEC”) adopted the final rule under SEC Release No. 33-10532, “Disclosure Update and Simplification,” adopting amendments to certain disclosure rules that were redundant, duplicative, overlapping, outdated, or superseded, in light of other SEC disclosure requirements, GAAP or changes in the information environment. This release was subsequently codified in July 2019 as part of Accounting Standards Update (“ASU”) 2019-07, Codification Updates to SEC Sections - Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10532, “Disclosure Update and Simplification,” and Nos. 33-10231 and 33-10442, “Investment Company Reporting Modernization,” and Miscellaneous Updates . The amendments expanded the disclosure requirements relating to the analysis of equity for interim financial statements. Under the amendments, an analysis of the changes in each caption of stockholders’ equity and noncontrolling interests presented in the balance sheet must be provided in a note or separate statement. The analysis must present a reconciliation of the beginning balance to the ending balance of each period for which a statement of earnings is required to be filed. The final rule was effective on November 5, 2018. The Company adopted the final rule effective for the first quarter of 2019. The adoption of the final rule did not have an impact on the Company’s consolidated financial position or results of operations. See Note 16, Changes in Equity , for the new required disclosures. In February 2016, the Financial Accounting Standards Board issued ASU 2016-02, Leases (Topic 842), as amended and supplemented by subsequent ASUs (collectively, “ASC 842”). ASC 842 amends the existing guidance in Accounting Standards Codification (“ASC”) 840, Leases . This ASU requires, among other things, the recognition of lease right-of-use (“ROU”) assets and lease liabilities by lessees for those leases currently classified as operating leases. ASC 842 allowed companies to adopt the new standard by applying either a modified retrospective method to the beginning of the earliest period presented in the financial statements or an optional transition method to initially apply the standard on January 1, 2019 and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company adopted the standard using the optional transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. The Company elected the package of practical expedients which provides relief from having to reassess (1) whether any expired or existing contracts contain leases, (2) lease classification (as operating or financing) for any expired or existing leases, and (3) initial direct costs for any existing leases. The Company also elected to separate non-lease components from lease components. Based on the Company’s evaluation of ASC 842, the adoption on January 1, 2019 resulted in an increase of $ 43.3 million to its assets and liabilities on the Condensed Consolidated Balance Sheets with no impact to its results of operations or cash flows . The effects of the changes made to the Company’s January 1, 2019 consolidated balance sheet for the adoption of ASC 842 were as follows: BALANCE SHEET Balance as of Adjustments due to Balance as of (in thousands) December 31, 2018 (a) ASC 842 January 1, 2019 ASSETS Other assets (b) $ 50,523 $ 43,273 $ 93,796 LIABILITIES Accrued expenses and other current liabilities (b) $ 174,325 $ 11,569 $ 185,894 Other long-term liabilities (b) 151,639 31,704 183,343 ____________________________________________________________________________________________________ (a) Balance as previously reported on the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. (b) Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Condensed Consolidated Balance Sheets. The following table presents the impacts of adoption of the new leases standard on the Condensed Consolidated Balance Sheet: As of September 30, 2019 Balance Without BALANCE SHEET Adoption of Effect of (in thousands) As Reported ASC 842 Change ASSETS Other assets (a) $ 90,943 $ 49,823 $ 41,120 LIABILITIES Accrued expenses and other current liabilities (a) $ 188,373 $ 177,298 $ 11,075 Other long-term liabilities (a) 186,965 156,920 30,045 ____________________________________________________________________________________________________ (a) Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Condensed Consolidated Balance Sheets. For the three and nine months ended September 30, 2019, the new requirements of ASC 842 did not have an impact on the Company’s results of operations or cash flows .

Revenue

Revenue	9 Months Ended
	Sep. 30, 2019
Revenue [Abstract]
Revenue	(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 three and nine months ended September 30, 2019 and 2018. Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Civil segment revenue by end market: Mass transit $ 265,671 $ 177,619 $ 655,541 $ 485,841 Bridges 113,743 128,240 269,517 311,979 Highways 44,630 46,553 145,917 129,619 Tunneling 32,076 33,377 96,602 66,009 Other 68,426 45,699 164,121 103,627 Total Civil segment revenue $ 524,546 $ 431,488 $ 1,331,698 $ 1,097,075 Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Building segment revenue by end market: Commercial and industrial facilities $ 121,206 $ 57,505 $ 345,752 $ 290,571 Health care facilities 58,323 127,219 199,347 320,416 Municipal and government 62,444 67,003 192,986 187,984 Hospitality and gaming 57,672 65,744 180,556 226,999 Mass transit 53,384 — 123,772 — Education facilities 33,469 43,405 123,059 108,763 Mixed use 2,183 40,758 26,774 121,348 Other 26,665 53,858 84,884 136,631 Total Building segment revenue $ 415,346 $ 455,492 $ 1,277,130 $ 1,392,712 Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Specialty Contractors segment revenue by end market: Mass transit $ 103,710 $ 63,457 $ 285,121 $ 216,808 Commercial and industrial facilities 51,471 48,601 139,112 136,892 Multi-unit residential 25,860 18,254 56,474 64,104 Education facilities 21,610 26,024 47,226 77,626 Mixed use 18,465 37,587 47,170 137,420 Health care facilities 5,217 12,873 26,116 43,861 Transportation 5,931 17,150 16,092 73,154 Other 17,189 12,211 46,968 31,726 Total Specialty Contractors segment revenue $ 249,453 $ 236,157 $ 664,279 $ 781,591 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by customer type: State and local agencies $ 420,839 $ 144,106 $ 136,191 $ 701,136 $ 341,067 $ 177,377 $ 99,913 $ 618,357 Private owners 70,855 234,350 108,476 413,681 63,477 225,225 124,186 412,888 Federal agencies 32,852 36,890 4,786 74,528 26,944 52,890 12,058 91,892 Total revenue $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by customer type: State and local agencies $ 1,059,384 $ 422,590 $ 347,517 $ 1,829,491 $ 894,613 $ 452,918 $ 312,541 $ 1,660,072 Private owners 189,325 733,103 301,446 1,223,874 134,891 790,330 423,280 1,348,501 Federal agencies 82,989 121,437 15,316 219,742 67,571 149,464 45,770 262,805 Total revenue $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by contract type: Fixed price $ 376,230 $ 144,514 $ 208,689 $ 729,433 $ 272,996 $ 91,972 $ 193,607 $ 558,575 Guaranteed maximum price 639 159,217 4,405 164,261 3,025 269,069 18,720 290,814 Unit price 142,253 2,922 25,193 170,368 141,917 9,938 7,939 159,794 Cost plus fee and other 5,424 108,693 11,166 125,283 13,550 84,513 15,891 113,954 Total revenue $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by contract type: Fixed price $ 969,041 $ 395,123 $ 551,779 $ 1,915,943 $ 716,826 $ 267,630 $ 675,526 $ 1,659,982 Guaranteed maximum price 4,517 551,399 15,326 571,242 11,200 801,537 51,762 864,499 Unit price 343,416 10,950 64,379 418,745 332,118 29,526 21,829 383,473 Cost plus fee and other 14,724 319,658 32,795 367,177 36,931 294,019 32,474 363,424 Total revenue $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378 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. Net revenue was negatively impacted during the three- and nine-month periods ended September 30, 2019 related to performance obligations satisfied (or partially satisfied) in prior periods by $ 13.8 million and $ 46.3 million, respectively. Net revenue recognized during the three and nine months ended September 30, 2018 related to performance obligations satisfied (or partially satisfied) in prior periods was immaterial. 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 September 30, 2019, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $ 5.3 billion, $ 1.6 billion and $ 2.2 billion for the Civil, Building and Specialty Contractors segments, respectively. As of September 30, 2018, the aggregate amounts of the transaction prices allocated to the remaining performance obligations of the Company’s construction contracts were $ 4.2 billion, $ 2.1 billion and $ 1.7 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 .

Contract Assets and Liabilities

Contract Assets and Liabilities	9 Months Ended
	Sep. 30, 2019
Contract Assets and Liabilities [Abstract]
Contract Assets And Liabilities	(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 Condensed Consolidated Balance Sheets consisted of the following: As of September 30, As of December 31, (in thousands) 2019 2018 Retainage receivable $ 542,274 $ 478,744 Costs and estimated earnings in excess of billings: Claims 756,760 698,274 Unapproved change orders 334,125 354,000 Other unbilled costs and profits 68,448 90,021 Total costs and estimated earnings in excess of billings 1,159,333 1,142,295 Capitalized contract costs 60,290 37,404 Total contract assets $ 1,761,897 $ 1,658,443 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 towards completion. As of September 30, 2019, the amount of retainage receivables estimated by management to be collected beyond one year is approximately 39 % 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 11, Commitments and Contingencies , 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. 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 three and nine months ended September 30, 2019, $ 8.5 million and $ 22.8 million, respectively, of previously capitalized contract costs were amortized and recognized as expense on the related contracts. During the three and nine months ended September 30, 2018, $ 4.0 million and $ 12.2 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 Condensed Consolidated Balance Sheets consisted of the following: As of September 30, As of December 31, (in thousands) 2019 2018 Retainage payable $ 232,209 $ 211,956 Billings in excess of costs and estimated earnings 818,806 573,190 Total contract liabilities $ 1,051,015 $ 785,146 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 September 30, 2019, the amount of retainage payable estimated by management to be remitted beyond one year is approximately 30 % 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 three and nine months ended September 30, 2019 and included in the opening billings in excess of costs and estimated earnings balances for each period totaled $ 322.8 million and $ 437.1 million, respectively. Revenue recognized during the three and nine months ended September 30, 2018 and included in the opening billings in excess of costs and estimated earnings balances for each period totaled $ 251.4 million and $ 341.2 million, respectively.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	9 Months Ended
	Sep. 30, 2019
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash, Cash Equivalents and Restricted Cash	(5) Cash, Cash Equivalents and Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets to the amounts shown in the Condensed Consolidated Statements of Cash Flows: As of September 30, As of December 31, (in thousands) 2019 2018 Cash and cash equivalents available for general corporate purposes $ 49,166 $ 51,749 Joint venture cash and cash equivalents 157,964 64,326 Cash and cash equivalents 207,130 116,075 Restricted cash 6,261 3,788 Total cash, cash equivalents and restricted cash $ 213,391 $ 119,863 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. Amounts included in restricted cash are primarily held as collateral to secure insurance-related contingent obligations, such as insurance claim deductibles, in lieu of letters of credit.

Earnings Per Common Share (EPS)

Earnings Per Common Share (EPS)	9 Months Ended
	Sep. 30, 2019
Earnings Per Common Share (EPS) [Abstract]
Earnings Per Common Share (EPS)	(6) 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 9, Financial Commitments . In accordance with ASC 260, Earnings Per Share (“ASC 260”) , 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 . The Company calculates the effect of the potentially dilutive restricted stock units and stock options using the treasury stock method. Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per common share data) 2019 2018 2019 2018 Net income (loss) attributable to Tutor Perini Corporation $ 19,313 $ 21,272 $ ( 301,573 ) $ 34,031 Weighted-average common shares outstanding, basic 50,279 50,018 50,201 49,927 Effect of dilutive restricted stock units and stock options 303 357 — 283 Weighted-average common shares outstanding, diluted 50,582 50,375 50,201 50,210 Net income (loss) attributable to Tutor Perini Corporation per common share: Basic $ 0.38 $ 0.43 $ ( 6.01 ) $ 0.68 Diluted $ 0.38 $ 0.42 $ ( 6.01 ) $ 0.68 Anti-dilutive securities not included above 1,665 2,107 3,458 2,765 The net loss attributable to Tutor Perini Corporation per common share for the nine months ended September 30, 2019 in the table above reflects the impact of the $ 379.9 million goodwill impairment charge discussed in Note 8, Goodwill and Intangible Assets , with an after-tax impact of $ 329.5 million, or $ 6.56 per diluted share . For the nine months ended September 30, 2019, all outstanding restricted stock units and stock options were excluded from the calculation of diluted shares outstanding due to the net loss for the period.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Taxes [Abstract]
Income Taxes	(7) Income Taxes The Company’s effective income tax rate was 17.3 % and 11.0 % for the three and nine months ended September 30, 2019 and 22.5 % and 26.2 % for the three and nine months ended September 30, 2018, respectively. The Company’s provision for income taxes and effective tax rate for the nine months ended September 30, 2019 were significantly impacted by the goodwill impairment charge discussed in Note 8, Goodwill and Intangible Assets . Of the total goodwill impairment charge of $ 379.9 million, approximately $ 209.5 million pertained to goodwill that is not tax deductible and yielded permanent differences between book income and taxable income. For the nine months ended September 30, 2019, the Company recognized a tax benefit totaling $ 50.4 million as a result of the impairment charge. Additionally, approximately $ 50.3 million was recorded as a deferred tax asset or a reduction of a previously recorded deferred tax liability due to the impairment charge. The effective tax rate for the three months ended September 30, 2019 of 17.3 % and the adjusted effective income tax rate for the nine months ended September 30, 2019 of 25.1 %, which excludes the goodwill impairment charge and associated tax benefit, were favorably impacted by earnings attributable to noncontrolling interests for which income taxes are not the responsibility of the Company and tax return-to-provision adjustments. The nine-month period ended September 30, 2019 also included the unfavorable impact of expired stock options for which the share-based compensation expense recognized in prior periods will not be deductible for income taxes. The effective tax rates for the 2018 periods were favorably impacted by the release of tax liabilities as a result of expirations of statutes of limitations and earnings attributable to noncontrolling interests for which income taxes are not the responsibility of the Company, partially offset by unfavorable rate impacts of share-based compensation-related changes. The effective tax rates for all periods also include provisions for state income taxes, net of the federal benefit.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets [Abstract]
Goodwill and Intangible Assets	(8) Goodwill and Intangible Assets Goodwill The following table presents the changes in the carrying amount of goodwill since its inception through September 30, 2019: Specialty (in thousands) Civil Building Contractors Total Gross goodwill $ 492,074 $ 424,724 $ 156,193 $ 1,072,991 Accumulated impairment ( 76,716 ) ( 411,269 ) — ( 487,985 ) Balance as of December 31, 2018 415,358 13,455 156,193 585,006 Second quarter 2019 impairment ( 210,215 ) ( 13,455 ) ( 156,193 ) ( 379,863 ) Balance as of September 30, 2019 (a) $ 205,143 $ — $ — $ 205,143 ____________________________________________________________________________________________________ (a) As of September 30, 2019, accumulated impairment was $ 867.8 million. The aggregate carrying amount of goodwill allocated to the Company’s three reporting units as of December 31, 2018 was $ 585.0 million. The Company tests the goodwill allocated to its reporting units for impairment annually on October 1, or more frequently if events or circumstances indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company performed its 2018 annual impairment test as of October 1, 2018 using a weighted average of (1) an income approach and (2) a market approach to determine the fair value of each reporting unit and concluded that the goodwill was not impaired since the estimated fair value of each reporting unit exceeded its respective net book value. In addition, the Company determined the implied control premium (the excess of the aggregated fair values of its reporting units over its market capitalization) was consistent with and within a reasonable range of actual premiums paid in industry-specific merger and acquisition (“M&A”) transactions over a sustained period of time. During the interim periods since the date of the last annual test, and prior to the second quarter of 2019, the Company concluded that no triggering events had occurred. In the second quarter of 2019, in connection with the preparation of its quarterly financial statements, 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 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 are changes reflective of market participant inputs and the recent decrease in the Company’s market valuation. 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 is based on estimated present value of future cash flows for each reporting unit. The market approach is based on assumptions about how market data relates to each reporting unit. The weighting of these two approaches is based on their individual correlation to the economics of each reporting unit and is 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. Similar to previous valuations, the Company noted that small changes to valuation assumptions could have a significant impact on the concluded value. 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. As of September 30, 2019, the Company determined that no triggering events occurred or circumstances changed since the date of our Interim Test that would more likely than not reduce the fair value of the Civil reporting unit below its carrying amount. However, since the Interim Test reduced the carrying value of the Civil reporting unit to approximate its fair value , there is a risk of additional goodwill impairment if future events related to the Civil reporting unit are less favorable than what the Company assumed or estimated in its Interim Test. The Company will continue to monitor events occurring or circumstances changing which may suggest that goodwill should be reevaluated during interim periods prior to the annual impairment test. These events and circumstances include, but are not limited to, a sustained decline in our stock price and market capitalization, as well as 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. Intangible Assets Intangible assets consist of the following: As of September 30, 2019 Weighted Accumulated Average Accumulated Impairment Carrying Amortization (in thousands) Cost Amortization Charge Value Period Trade names (non-amortizable) $ 117,600 $ — $ ( 67,190 ) $ 50,410 Indefinite Trade names (amortizable) 74,350 ( 20,645 ) ( 23,232 ) 30,473 20 years Contractor license 6,000 — ( 6,000 ) — N/A Customer relationships 39,800 ( 20,784 ) ( 16,645 ) 2,371 12 years Construction contract backlog 73,706 ( 73,706 ) — — N/A Total $ 311,456 $ ( 115,135 ) $ ( 113,067 ) $ 83,254 As of December 31, 2018 Weighted Accumulated Average Accumulated Impairment Carrying Amortization (in thousands) Cost Amortization Charge Value Period Trade names (non-amortizable) $ 117,600 $ — $ ( 67,190 ) $ 50,410 Indefinite Trade names (amortizable) 74,350 ( 18,780 ) ( 23,232 ) 32,338 20 years Contractor license 6,000 — ( 6,000 ) — N/A Customer relationships 39,800 ( 19,992 ) ( 16,645 ) 3,163 12 years Construction contract backlog 73,706 ( 73,706 ) — — N/A Total $ 311,456 $ ( 112,478 ) $ ( 113,067 ) $ 85,911 Amortization expense for the three and nine months ended September 30, 2019 was $ 0.9 million and $ 2.7 million, respectively. Amortization expense for the three and nine months ended September 30, 2018 was $ 0.9 million and $ 2.7 million, respectively. As of September 30, 2019, amortization expense is estimated to be $ 0.9 million for the remainder of 2019, $ 3.5 million in 2020, $ 3.4 million in 2021, $ 2.6 million in 2022 and $ 2.5 million in both 2023 and 2024. 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 has also monitored events and circumstances as well as any entity-specific quantitative or qualitative factors, which occurred during interim periods since the annual test, that suggest intangible assets should be reevaluated for impairment. During the interim periods since the date of the last annual test, and prior to the second quarter of 2019, management concluded that there have been no triggering events that would more likely than not reduce the fair value of the Company’s intangible assets below their carrying amounts. In conjunction with its interim goodwill test during the second quarter of 2019, the Company also evaluated its non-amortizable trade names for potential impairment due to the second quarter triggering factors related to goodwill mentioned above. The Company performed its interim impairment test by comparing the carrying value of its indefinite-lived intangible assets to their calculated fair value, which is determined by the income approach (relief from royalty method). This income-based valuation approach involves similar key assumptions to the goodwill impairment analysis discussed above. The interim impairment test performed in the second quarter of 2019 resulted in an estimated fair value for the non-amortizable trade names that substantially exceeded their respective net book values; therefore, no impairment charge was necessary for the second quarter. While the key assumptions used in the impairment test of the non-amortizable trade names are similar to those used in the evaluation of goodwill, historically, the headroom (the excess of calculated fair value over carrying value) has been relatively higher for non-amortizable trade names than for goodwill. Unlike goodwill, trade names possess inherent value based on market perception which is valued considering the cost savings available through ownership and the avoidance of paying royalties associated with revenue generation. The discounted value is not impacted by cash flow related assumptions such as working capital investment. Consequently, goodwill was impaired while the non-amortizable trade name intangible assets were not. As of September 30, 2019, management concluded that no triggering events occurred or circumstances changed since the date of the interim impairment test that would more likely than not reduce the fair value of the Company’s intangible assets below their carrying amounts. The Company also performed a qualitative assessment to evaluate its long-lived tangible and intangible assets with finite lives due to the changes in circumstances since the Company’s 2018 annual impairment analysis. Based on this assessment in which there were no identified changes to market prices, the manner of use or the planned purchase or sale of assets/asset groups, the Company concluded that no triggering events occurred since the date of its last annual test that would more likely than not reduce the fair value of its long-lived tangible and intangible assets with finite lives below their carrying amounts.

Financial Commitments

Financial Commitments	9 Months Ended
	Sep. 30, 2019
Financial Commitments [Abstract]
Financial Commitments	(9) Financial Commitments Long-Term Debt Long-term debt as reported on the Condensed Consolidated Balance Sheets consisted of the following: As of September 30, As of December 31, (in thousands) 2019 2018 2017 Senior Notes $ 494,148 $ 493,521 2017 Credit Facility 117,000 41,000 Convertible Notes 179,494 171,481 Equipment financing and mortgages 40,475 50,904 Other indebtedness 5,127 4,598 Total debt 836,244 761,504 Less: Current maturities 10,862 16,767 Long-term debt, net $ 825,382 $ 744,737 The following table reconciles the outstanding debt balance to the reported debt balances as of September 30, 2019 and December 31, 2018: As of September 30, 2019 As of December 31, 2018 (in thousands) Outstanding Long-Term Debt Unamortized Discount and Issuance Costs Long-Term Debt, as reported Outstanding Long-Term Debt Unamortized Discount and Issuance Costs Long-Term Debt, as reported 2017 Senior Notes $ 500,000 $ ( 5,852 ) $ 494,148 $ 500,000 $ ( 6,479 ) $ 493,521 Convertible Notes 200,000 ( 20,506 ) 179,494 200,000 ( 28,519 ) 171,481 The unamortized issuance costs related to the 2017 Credit Facility were $ 4.1 million and $ 4.8 million as of September 30, 2019 and December 31, 2018, respectively, and are included in other assets in the Condensed Consolidated Balance Sheets. 2017 Senior Notes On April 20 , 2017, the Company issued $ 500 million in aggregate principal amount of 6.875 % Senior Notes due 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 may redeem the 2017 Senior Notes at a redemption price equal to 100 % of their principal amount plus a “make-whole” premium described in the indenture. In addition, prior to May 1, 2020, the Company may redeem up to 40 % of the original aggregate principal amount of the notes at a redemption price of 106.875 % of their principal amount with the proceeds received by the Company from any offering of the Company’s equity. After 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 2017 Credit Facility, as defined below. 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. 2017 Credit Facility On April 20, 2017, the Company entered into a credit agreement (the “2017 Credit Facility”) with SunTrust Bank as Administrative Agent, Swing Line Lender and L/C Issuer and a syndicate of other lenders. The 2017 Credit Facility provides for a $ 350 million revolving credit facility (the “2017 Revolver”) and a sublimit for the issuance of letters of credit and swingline 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, are outstanding on December 17, 2020, in which case all such borrowings will mature on December 17, 2020 (subject to certain further exceptions). In addition, the 2017 Credit Facility permits additional borrowings in an aggregate amount of $ 150 million, which can be in the form of increased capacity on the 2017 Revolver or the establishment of one or more term loans. Borrowings under the 2017 Revolver bear interest, at the Company’s option, at a rate equal to (a) the London Interbank Offered Rate (“LIBOR”) plus a margin of between 1.50 % and 3.00 % or (b) a base rate (determined by reference to the highest of (i) the administrative agent’s prime lending rate, (ii) the federal funds effective rate plus 50 basis points, (iii) the LIBOR rate for a one-month interest period plus 100 basis points and (iv) 0 %), plus a margin of between 0.50 % and 2.00 %, in each case based on the Consolidated Leverage Ratio (as defined in the 2017 Credit Facility). In addition to paying interest on outstanding principal under the 2017 Credit Facility, the Company will pay a commitment fee to the lenders under the 2017 Revolver in respect of the unutilized commitments thereunder. The Company will pay customary letter of credit fees. If an event of default occurs and is continuing, the otherwise applicable margin and letter of credit fees will be increased by 2 % per annum. The weighted-average annual interest rate on borrowings under the 2017 Revolver was approximately 5.03 % during the nine months ended September 30, 2019. The 2017 Credit Facility contains customary covenants for credit facilities of this type, including maximum consolidated leverage ratios ranging from 4.00 :1.00 to 3.25 :1.00 over the life of the facility and a minimum consolidated fixed charge coverage ratio of 1.25 :1.00. On May 7, 2019, certain provisions of the 2017 Credit Facility were amended, including setting the maximum leverage ratio at 3.50 :1.00 for the remainder of its term, thus eliminating the step down from 3.50 :1:00 to 3.25 :1.00. Substantially all of the Company’s subsidiaries unconditionally guarantee the obligations of the Company under the 2017 Credit Facility; additionally, the obligations are secured by a lien on all personal property of the Company and its subsidiaries guaranteeing these obligations. As of September 30, 2019, there was $ 233 million available under the 2017 Revolver, and the Company had not utilized the 2017 Credit Facility for letters of credit. The Company was in compliance with the financial covenants under the 2017 Credit Facility as of September 30, 2019 (the goodwill impairment charge, as discussed in Note 8, Goodwill and Intangible Assets , did not impact the financial covenant calculations). 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. The Convertible Notes are unsecured obligations 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. Prior to January 15, 2021, the Convertible Notes will be convertible only under the following circumstances: (1) during the five business day period after any ten consecutive trading day period in which the trading price per $ 1,000 principal amount of Convertible Notes for such trading day was less than 98 % of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; (2) if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130 % of the conversion rate of 33.0579 (or $ 39.32 ) on each applicable trading day; or (3) upon the occurrence of specified corporate events. 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 will be 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 September 30, 2019, the conversion provisions of the Convertible Notes have not been triggered. Interest Expense Interest expense as reported in the Condensed Consolidated Statements of Operations consisted of the following: Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Cash interest expense: Interest on 2017 Senior Notes $ 8,594 $ 8,594 $ 25,781 $ 25,781 Interest on 2017 Credit Facility 3,385 2,596 9,712 6,300 Interest on Convertible Notes 1,438 1,437 4,313 4,312 Other interest 540 736 1,656 2,119 Total cash interest expense 13,957 13,363 41,462 38,512 Non-cash interest expense: (a) Amortization of discount and debt issuance costs on Convertible Notes 2,734 2,490 8,013 7,298 Amortization of debt issuance costs on 2017 Credit Facility 401 360 1,150 1,080 Amortization of debt issuance costs on 2017 Senior Notes 213 198 627 584 Total non-cash interest expense 3,348 3,048 9,790 8,962 Total interest expense $ 17,305 $ 16,411 $ 51,252 $ 47,474 ____________________________________________________________________________________________________ (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 and the Convertible Notes were 7.13 % and 9.39 %, respectively, for the nine months ended September 30, 2019.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	(10) 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 September 30, 2019, the Company’s operating leases have remaining lease terms ranging from less than one year to 10 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 Condensed Consolidated Balance Sheet as of September 30, 2019. 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 three and nine months ended September 30, 2019: Three Months Ended Nine Months Ended (in thousands) September 30, 2019 September 30, 2019 Operating lease expense $ 4,047 $ 11,749 Short-term lease expense (a) 17,786 50,843 21,833 62,592 Less: Sublease income 263 784 Total lease expense $ 21,570 $ 61,808 ____________________________________________________________________________________________________ (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 September 30, 2019: As of September 30, (dollars in thousands) Balance Sheet Line Item 2019 Assets ROU assets Other assets $ 41,186 Total lease assets $ 41,186 Liabilities Current lease liabilities Accrued expenses and other current liabilities $ 11,267 Long-term lease liabilities Other long-term liabilities 33,027 Total lease liabilities $ 44,294 Weighted-average remaining lease term (in years) 5.1 Weighted-average discount rate 5.88 % The following table presents supplemental cash flow information and non-cash activity related to operating leases for the nine months ended September 30, 2019: Nine Months Ended (in thousands) September 30, 2019 Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ ( 11,586 ) Non-cash activity: ROU assets obtained in exchange for lease liabilities $ 7,621 The following table presents maturities of operating lease liabilities on an undiscounted basis as of September 30, 2019: Year (in thousands) Operating Leases 2019 (excluding the nine months ended September 30, 2019) $ 3,781 2020 12,339 2021 8,997 2022 7,695 2023 6,489 Thereafter 12,461 Total lease payments 51,762 Less: Imputed interest 7,468 Total $ 44,294 As of December 31, 2018, future minimum lease payments under long-term non-cancelable operating leases as classified under ASC 840 were as follows: Year (in thousands) Operating Leases 2019 $ 14,039 2020 10,706 2021 7,464 2022 6,567 2023 5,587 Thereafter 11,662 56,025 Less: Sublease rental agreements 1,398 Total $ 54,627

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies [Abstract]
Commitments and Contingencies	(11) 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 4, Contract Assets and Liabilities. 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 from time to time 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. Management believes that, based on current information and discussions with the Company’s legal counsel, the ultimate resolution of these matters is not expected to have a material effect on the Company’s consolidated financial position. Long Island Expressway/Cross Island Parkway Matter The Company reconstructed the Long Island Expressway/Cross Island Parkway Interchange (“LIE Project”) for the New York State Department of Transportation (“NYSDOT”). The $ 130 million project was substantially completed in January 2004 and was accepted by NYSDOT as complete in February 2006. The Company incurred significant added costs in completing its work and suffered extended schedule costs due to numerous design errors, undisclosed utility conflicts, lack of coordination with local agencies and other interferences for which the Company believes NYSDOT is responsible. In March 2011, the Company opened a case with the New York State Court of Claims against NYSDOT related to the LIE Project. In May 2011, NYSDOT filed a motion to dismiss the Company’s claim on the grounds that the Company had not provided required documentation for project closeout and filing of a claim. In September 2011, the Company reached agreement on final payment with the Comptroller’s Office on behalf of NYSDOT, which resulted in an amount of $ 0.5 million payable to the Company and formally closed out the project allowing the Company to re-file its claim. In March 2012, the Company filed its formal Verified Claim seeking $ 50.7 million in damages. In May 2012, NYSDOT served its answer and asserted counterclaims in the amount of $ 151 million alleging fraud in the inducement and punitive damages related to alleged violations of the disadvantaged business enterprise (“DBE”) requirements for the project. The Court subsequently ruled that NYSDOT’s counterclaims may only be asserted as a defense and offset to the Company’s claims and not as affirmative claims. In November 2014, the Appellate Division First Department affirmed the dismissal of NYSDOT’s affirmative counterclaims. In June 2018, following additional summary judgment motions, the Court granted the Company’s motion to dismiss NYSDOT’s affirmative defenses, which eliminated the use of NYSDOT’s counterclaims of $ 151 million as a defense to the claims of the Company. In October 2018, NYSDOT filed a notice of appeal. A trial date for the underlying case will not be set until after the appeal is resolved. Management has made an estimate of the total anticipated recovery on this project, and such estimate is included in revenue recorded to date. To the extent new facts become known or the final recovery included in the claim settlement varies from the estimate, the impact of the change will be reflected in the consolidated financial statements at that time. As of September 30, 2019, the Company has concluded that the potential for a material adverse financial impact due to NYSDOT’s counterclaims is remote. 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 September 30, 2019, 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 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 has not accepted 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, has also 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 the first half of 2020. STP submitted damages to the Insurers in the King County lawsuit in the amount of $ 532 million. STP is also seeking 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 for breach of contract alleging STP’s delays and failure to perform, seeking $ 57.2 million in 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 caused the release and dismissal of claims that STP and Hitachi had against each other. The trial between STP and WSDOT commenced on October 7, 2019. As of September 30, 2019, the Company has concluded that the potential for a material adverse financial impact due to the Insurers’ denial of coverage and WSDOT’s legal actions is neither probable nor remote, and the potential loss or range of loss is not reasonably estimable. With respect to STP’s direct and indirect claims against the Insurers, WSDOT and Hitachi, management has included an estimate of the total anticipated recovery, concluded to be both probable and reliably estimable, in receivables or costs and estimated earnings in excess of billings recorded to date. To the extent new facts become known or the final recoveries vary from the estimate, the impact of the change will be reflected in the financial statements at that time. George Washington Bridge Bus Station Matter In August 2013, Tutor Perini Building Corporation (“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 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 liquidated 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 liquidated 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, and were expected to continue over various weeks through March 2020. On April 15, 2019, the counsel for the Developer withdrew from the case, which resulted in further delays to the proceedings. 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. Separately, on July 2, 2018, TPBC filed a lawsuit against the Port Authority of New York and New Jersey, as owner of the project, and STV Incorporated, as designer, seeking the same $ 113 million in damages. That lawsuit is proceeding in the discovery phase, and is not stayed by the Developer’s bankruptcy filing. As of September 30, 2019, 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, the Port Authority of New York and New Jersey, and STV Incorporated, management has made an estimate of the total anticipated recovery on this project, and such estimate is included in revenue recorded to date. To the extent new facts become known or the final recovery included in the claim settlement varies from the estimate, the impact of the change will be reflected in the consolidated financial statements at that time.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2019
Share-Based Compensation [Abstract]
Share-Based Compensation	(12) Share-Based Compensation As of September 30, 2019, there were 1,368,243 shares of common stock available for grant under the Tutor Perini Corporation Omnibus Incentive Plan. During the first nine months of 2019 and 2018, the Company issued the following share-based instruments: (1) restricted stock units totaling 400,000 and 614,000 with weighted-average fair values per share of $ 20.90 and $ 25.19 , respectively; (2) stock options totaling 135,000 and 579,000 with weighted-average fair values per share of $ 6.84 and $ 11.45 , respectively, and weighted-average per share exercise prices of $ 20.94 and $ 23.99 , respectively; and (3) unrestricted stock units totaling 98,591 and 115,420 with weighted-average fair values per share of $ 15.72 and $ 21.26 , respectively . During the nine months ended September 30, 2019, 839,711 stock options with a weighted-average per share exercise price of $ 20.78 expired or were forfeited. 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. The fair value of stock options granted during the first nine months of 2019 was determined using the Black-Scholes model based on the following weighted-average assumptions: (i) expected life of 5.8 years, (ii) expected volatility of 38.17 %, (iii) risk-free rate of 2.31 %, and (iv) no quarterly dividends. For certain performance-based awards containing market condition components, the fair value on the grant date is determined using a Monte Carlo simulation model. For the three and nine months ended September 30, 2019, the Company recognized, as part of general and administrative expenses, costs for share-based payment arrangements totaling $ 4.3 million and $ 14.3 million, respectively, and $ 5.7 million and $ 17.8 million for the three and nine months ended September 30, 2018, respectively. As of September 30, 2019, the balance of unamortized share-based compensation expense was $ 22.8 million, which is expected to be recognized over a weighted-average period of 2.1 years.

Employee Pension Plans

Employee Pension Plans	9 Months Ended
	Sep. 30, 2019
Employee Pension Plans [Abstract]
Employee Pension Plans	(13) Employee Pension Plans The Company has a defined benefit pension plan and an unfunded supplemental retirement plan. Effective June 1, 2004, all benefit accruals under these plans were frozen; however, the current vested benefit was preserved. The pension disclosure presented below includes aggregated amounts for both of the Company’s plans. The following table sets forth a summary of the net periodic benefit cost for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Interest cost $ 948 $ 883 $ 2,844 $ 2,649 Expected return on plan assets ( 1,043 ) ( 1,077 ) ( 3,129 ) ( 3,231 ) Amortization of net loss 463 513 1,389 1,539 Other 225 213 675 639 Net periodic benefit cost $ 593 $ 532 $ 1,779 $ 1,596 The Company contributed $ 3.3 million and $ 2.1 million to its defined benefit pension plan during each of the nine-month periods ended September 30, 2019 and 2018, respectively, and expects to contribute an additional $ 1.3 million by the end of 2019.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Measurements [Abstract]
Fair Value Measurements	(14) Fair Value Measurements The fair value hierarchy established by ASC 820, Fair Value Measurement , 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 September 30, 2019 and December 31, 2018: As of September 30, 2019 As of December 31, 2018 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) $ 207,130 $ — $ — $ 207,130 $ 116,075 $ — $ — $ 116,075 Restricted cash (a) 6,261 — — 6,261 3,788 — — 3,788 Restricted investments (b) — 67,728 — 67,728 — 58,142 — 58,142 Investments in lieu of retainage (c) 78,492 1,229 — 79,721 62,858 1,190 — 64,048 Total $ 291,883 $ 68,957 $ — $ 360,840 $ 182,721 $ 59,332 $ — $ 242,053 ____________________________________________________________________________________________________ (a) Includes money market funds and short-term investments with maturity dates of three months or less when acquired. (b) Restricted investments, as of September 30, 2019, consist of investments in corporate debt securities of $ 37.0 million and U.S. government agency securities of $ 30.7 million 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, 2018, restricted investments consisted of investments in corporate debt securities of $ 30.4 million and U.S. government agency securities of $ 27.7 million. The amortized cost of these available-for-sale securities at September 30, 2019 and December 31, 2018 was not materially different from the fair value. (c) Investments in lieu of retainage are included in retainage receivable and as of September 30, 2019 are comprised of money market funds of $ 78.5 million and municipal bonds of $ 1.2 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, 2018, investments in lieu of retainage consisted of money market funds of $ 62.9 million and municipal bonds of $ 1.2 million. The amortized cost of these available-for-sale securities at September 30, 2019 and December 31, 2018 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 $ 486.0 million and $ 466.8 million as of September 30, 2019 and December 31, 2018, respectively. The fair value of the Convertible Notes was $ 190.3 million and $ 184.4 million as of September 30, 2019 and December 31, 2018, respectively. The fair values of the 2017 Senior Notes and Convertible Notes were determined using Level 1 inputs, specifically current observable market prices. The reported value of the Company’s remaining borrowings approximates fair value as of September 30, 2019 and December 31, 2018.

Variable Interest Entities (VIE

Variable Interest Entities (VIEs)	9 Months Ended
	Sep. 30, 2019
Variable Interest Entities (VIEs) [Abstract]
Variable Interest Entities (VIEs)	(15) 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, Consolidation (“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 the 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 September 30, 2019, the Company had unconsolidated VIE-related current assets and liabilities of $ 0.5 million and $ 0.4 million, respectively, included in the Company’s Condensed Consolidated Balance Sheet. As of December 31, 2018, the Company had unconsolidated VIE-related current assets and liabilities of $ 4.0 million and $ 3.8 million, respectively, included in the Company’s Condensed 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 September 30, 2019. As of September 30, 2019, the Company’s Condensed Consolidated Balance Sheet included current and noncurrent assets of $ 372.6 million and $ 56.8 million, respectively, as well as current liabilities of $ 526.8 million related to the operations of its consolidated VIEs. As of December 31, 2018, the Company’s Condensed Consolidated Balance Sheet included current and noncurrent assets of $ 173.9 million and $ 51.5 million, respectively, as well as current liabilities of $ 319.9 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. 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.

Changes in Equity

Changes in Equity	9 Months Ended
	Sep. 30, 2019
Changes in Equity [Abstract]
Changes in Equity	(16) Changes in Equity A reconciliation of the changes in equity for the three and nine months ended September 30, 2019 and 2018 is provided below: Three Months Ended September 30, 2019 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - June 30, 2019 $ 50,279 $ 1,110,496 $ 380,795 $ ( 42,530 ) $ ( 9,481 ) $ 1,489,559 Net income — — 19,313 — 7,408 26,721 Other comprehensive income (loss) — — — 236 ( 99 ) 137 Share-based compensation — 3,491 — — — 3,491 Contributions from noncontrolling interests — — — — 1,140 1,140 Distributions to noncontrolling interests — — — — ( 17,500 ) ( 17,500 ) Balance - September 30, 2019 $ 50,279 $ 1,113,987 $ 400,108 $ ( 42,294 ) $ ( 18,532 ) $ 1,503,548 Nine Months Ended September 30, 2019 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - December 31, 2018 $ 50,026 $ 1,102,919 $ 701,681 $ ( 45,449 ) $ ( 21,288 ) $ 1,787,889 Net income (loss) — — ( 301,573 ) — 17,577 ( 283,996 ) Other comprehensive income — — — 3,155 160 3,315 Share-based compensation — 13,586 — — — 13,586 Issuance of common stock, net 253 ( 2,518 ) — — — ( 2,265 ) Contributions from noncontrolling interests — — — — 6,519 6,519 Distributions to noncontrolling interests — — — — ( 21,500 ) ( 21,500 ) Balance - September 30, 2019 $ 50,279 $ 1,113,987 $ 400,108 $ ( 42,294 ) $ ( 18,532 ) $ 1,503,548 Three Months Ended September 30, 2018 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - June 30, 2018 $ 50,011 $ 1,093,874 $ 631,004 $ ( 44,805 ) $ ( 17,540 ) $ 1,712,544 Net income — — 21,272 — 4,164 25,436 Other comprehensive income — — — 612 — 612 Share-based compensation — 4,993 — — — 4,993 Issuance of common stock, net 15 ( 228 ) — — — ( 213 ) Distributions to noncontrolling interests — — — — ( 10,000 ) ( 10,000 ) Balance - September 30, 2018 $ 50,026 $ 1,098,639 $ 652,276 $ ( 44,193 ) $ ( 23,376 ) $ 1,733,372 Nine Months Ended September 30, 2018 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity 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 ) — ( 1,740 ) ( 5,502 ) Net income — — 34,031 — 8,359 42,390 Other comprehensive loss — — — ( 1,475 ) — ( 1,475 ) Share-based compensation — 17,264 — — — 17,264 Issuance of common stock, net 245 ( 2,830 ) — — — ( 2,585 ) Contributions from noncontrolling interests — — — — 1,000 1,000 Distributions to noncontrolling interests — — — — ( 22,500 ) ( 22,500 ) Balance - September 30, 2018 $ 50,026 $ 1,098,639 $ 652,276 $ ( 44,193 ) $ ( 23,376 ) $ 1,733,372

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	(17) Other Comprehensive Income (Loss) ASC 220, Comprehensive Income , establishes standards for reporting and displaying 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 tax effects of the components of other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended Three Months Ended September 30, 2019 September 30, 2018 (in thousands) 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 $ 464 $ ( 133 ) $ 331 $ 513 $ ( 148 ) $ 365 Foreign currency translation adjustments ( 590 ) 140 ( 450 ) 519 ( 143 ) 376 Unrealized gain (loss) in fair value of investments 328 ( 72 ) 256 ( 173 ) 44 ( 129 ) Total other comprehensive income (loss) 202 ( 65 ) 137 859 ( 247 ) 612 Less: Other comprehensive income attributable to noncontrolling interests (a) ( 99 ) — ( 99 ) — — — Total other comprehensive income (loss) attributable to Tutor Perini Corporation $ 301 $ ( 65 ) $ 236 $ 859 $ ( 247 ) $ 612 ____________________________________________________________________________________________________ (a) The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation. Nine Months Ended Nine Months Ended September 30, 2019 September 30, 2018 (in thousands) 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 $ 1,390 $ ( 398 ) $ 992 $ 1,539 $ ( 439 ) $ 1,100 Foreign currency translation adjustment 961 ( 253 ) 708 ( 2,034 ) 602 ( 1,432 ) Unrealized gain (loss) in fair value of investments 2,053 ( 438 ) 1,615 ( 1,468 ) 325 ( 1,143 ) Total other comprehensive income (loss) 4,404 ( 1,089 ) 3,315 ( 1,963 ) 488 ( 1,475 ) Less: Other comprehensive income (loss) attributable to noncontrolling interests (a) 160 — 160 — — — Total other comprehensive income (loss) attributable to Tutor Perini Corporation $ 4,244 $ ( 1,089 ) $ 3,155 $ ( 1,963 ) $ 488 $ ( 1,475 ) ____________________________________________________________________________________________________ (a) The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation. The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the three and nine months ended September 30, 2019 were as follows: Three Months Ended September 30, 2019 Defined Unrealized Accumulated Benefit Foreign Gain in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of June 30, 2019 $ ( 38,009 ) $ ( 5,416 ) $ 895 $ ( 42,530 ) Other comprehensive income (loss) before reclassifications — ( 351 ) 254 ( 97 ) Amounts reclassified from AOCI 331 — 2 333 Total other comprehensive income 331 ( 351 ) 256 236 Balance as of September 30, 2019 $ ( 37,678 ) $ ( 5,767 ) $ 1,151 $ ( 42,294 ) Nine Months Ended September 30, 2019 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of December 31, 2018 $ ( 38,670 ) $ ( 6,315 ) $ ( 464 ) $ ( 45,449 ) Other comprehensive income before reclassifications — 548 1,633 2,181 Amounts reclassified from AOCI 992 — ( 18 ) 974 Total other comprehensive income 992 548 1,615 3,155 Balance as of September 30, 2019 $ ( 37,678 ) $ ( 5,767 ) $ 1,151 $ ( 42,294 ) The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the three and nine months ended September 30, 2018 were as follows: Three Months Ended September 30, 2018 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of June 30, 2018 $ ( 38,706 ) $ ( 5,399 ) $ ( 700 ) $ ( 44,805 ) Other comprehensive income (loss) before reclassifications — 376 ( 145 ) 231 Amounts reclassified from AOCI 365 — 16 381 Total other comprehensive income (loss) 365 376 ( 129 ) 612 Balance as of September 30, 2018 $ ( 38,341 ) $ ( 5,023 ) $ ( 829 ) $ ( 44,193 ) Nine Months Ended September 30, 2018 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Value of Comprehensive (in thousands) Plan Translation Investments, Net 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 — ( 1,432 ) ( 1,159 ) ( 2,591 ) Amounts reclassified from AOCI 1,100 — 16 1,116 Total other comprehensive income (loss) 1,100 ( 1,432 ) ( 1,143 ) ( 1,475 ) Balance as of September 30, 2018 $ ( 38,341 ) $ ( 5,023 ) $ ( 829 ) $ ( 44,193 )

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2019
Business Segments [Abstract]
Business Segments	(18) 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, 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: high-rise residential, hospitality and gaming, transportation, health care, commercial and government offices, sports and entertainment, education, correctional facilities, biotech, pharmaceutical, industrial and technology. 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 three and nine months ended September 30, 2019 and 2018: Reportable Segments Specialty Consolidated (in thousands) Civil Building Contractors Total Corporate Total Three Months Ended September 30, 2019 Total revenue $ 591,884 $ 421,241 $ 249,453 $ 1,262,578 $ — $ 1,262,578 Elimination of intersegment revenue ( 67,338 ) ( 5,895 ) — ( 73,233 ) — ( 73,233 ) Revenue from external customers $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ — $ 1,189,345 Income (loss) from construction operations $ 50,695 $ 7,580 $ 7,247 $ 65,522 $ ( 17,579 ) (a) $ 47,943 Capital expenditures $ 22,497 $ 144 $ 325 $ 22,966 $ 365 $ 23,331 Depreciation and amortization (b) $ 11,953 $ 495 $ 1,018 $ 13,466 $ 2,761 $ 16,227 Three Months Ended September 30, 2018 Total revenue $ 479,581 $ 457,304 $ 236,157 $ 1,173,042 $ — $ 1,173,042 Elimination of intersegment revenue ( 48,093 ) ( 1,812 ) — ( 49,905 ) — ( 49,905 ) Revenue from external customers $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 $ — $ 1,123,137 Income (loss) from construction operations $ 41,282 $ 8,853 $ 11,561 $ 61,696 $ ( 14,390 ) (a) $ 47,306 Capital expenditures $ 15,364 $ 277 $ 70 $ 15,711 $ 397 $ 16,108 Depreciation and amortization (b) $ 8,031 $ 488 $ 1,081 $ 9,600 $ 2,817 $ 12,417 ____________________________________________________________________________________________________ (a) Consists primarily of corporate general and administrative expenses. (b) Depreciation and amortization is included in income (loss) from construction operations. Reportable Segments Specialty Consolidated (in thousands) Civil Building Contractors Total Corporate Total Nine Months Ended September 30, 2019 Total revenue $ 1,516,623 $ 1,291,043 $ 664,279 $ 3,471,945 $ — $ 3,471,945 Elimination of intersegment revenue ( 184,925 ) ( 13,913 ) — ( 198,838 ) — ( 198,838 ) Revenue from external customers $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ — $ 3,273,107 Income (loss) from construction operations $ ( 72,032 ) $ 6,903 $ ( 160,036 ) $ ( 225,165 ) (a) $ ( 45,696 ) (b) $ ( 270,861 ) Capital expenditures $ 60,948 $ 349 $ 558 $ 61,855 $ 822 $ 62,677 Depreciation and amortization (c) $ 31,608 $ 1,495 $ 3,143 $ 36,246 $ 8,295 $ 44,541 Nine Months Ended September 30, 2018 Total revenue $ 1,266,595 $ 1,395,896 $ 781,591 $ 3,444,082 $ — $ 3,444,082 Elimination of intersegment revenue ( 169,520 ) ( 3,184 ) — ( 172,704 ) — ( 172,704 ) Revenue from external customers $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378 $ — $ 3,271,378 Income (loss) from construction operations (d) $ 93,560 $ 27,814 $ 26,250 $ 147,624 $ ( 46,428 ) (b) $ 101,196 Capital expenditures $ 61,912 $ 1,147 $ 704 $ 63,763 $ 648 $ 64,411 Depreciation and amortization (c) $ 20,356 $ 1,458 $ 3,299 $ 25,113 $ 8,468 $ 33,581 ____________________________________________________________________________________________________ (a) During the nine months ended September 30, 2019, the Company recorded a non-cash goodwill impairment charge of $ 379.9 million in income (loss) from continuing operations (an unfavorable after-tax impact of $ 329.5 million, or $ 6.56 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 8, Goodwill and Intangible Assets ). (b) Consists primarily of corporate general and administrative expenses. (c) Depreciation and amortization is included in income (loss) from construction operations. (d) During the nine months ended September 30, 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 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. A reconciliation of segment results to the consolidated income (loss) before income taxes is as follows: Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Income (loss) from construction operations $ 47,943 $ 47,306 $ ( 270,861 ) $ 101,196 Other income, net 1,674 1,909 2,996 3,739 Interest expense ( 17,305 ) ( 16,411 ) ( 51,252 ) ( 47,474 ) Income (loss) before income taxes $ 32,312 $ 32,804 $ ( 319,117 ) $ 57,461 Total assets by segment were as follows : As of As of (in thousands) September 30, 2019 December 31, 2018 Civil $ 2,791,537 $ 2,574,326 Building 965,917 913,746 Specialty Contractors 644,016 745,313 Corporate and other (a) 93,438 154,367 Total assets $ 4,494,908 $ 4,387,752 ____________________________________________________________________________________________________ (a) Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2019
Recent Accounting Pronouncements [Abstract]
Schedule of the Impact for the Adoption of ASU 842	The effects of the changes made to the Company’s January 1, 2019 consolidated balance sheet for the adoption of ASC 842 were as follows: BALANCE SHEET Balance as of Adjustments due to Balance as of (in thousands) December 31, 2018 (a) ASC 842 January 1, 2019 ASSETS Other assets (b) $ 50,523 $ 43,273 $ 93,796 LIABILITIES Accrued expenses and other current liabilities (b) $ 174,325 $ 11,569 $ 185,894 Other long-term liabilities (b) 151,639 31,704 183,343 ____________________________________________________________________________________________________ (a) Balance as previously reported on the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. (b) Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Condensed Consolidated Balance Sheets. The following table presents the impacts of adoption of the new leases standard on the Condensed Consolidated Balance Sheet: As of September 30, 2019 Balance Without BALANCE SHEET Adoption of Effect of (in thousands) As Reported ASC 842 Change ASSETS Other assets (a) $ 90,943 $ 49,823 $ 41,120 LIABILITIES Accrued expenses and other current liabilities (a) $ 188,373 $ 177,298 $ 11,075 Other long-term liabilities (a) 186,965 156,920 30,045 ____________________________________________________________________________________________________ (a) Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Condensed Consolidated Balance Sheets.

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue [Abstract]
Disaggregation of 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 three and nine months ended September 30, 2019 and 2018. Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Civil segment revenue by end market: Mass transit $ 265,671 $ 177,619 $ 655,541 $ 485,841 Bridges 113,743 128,240 269,517 311,979 Highways 44,630 46,553 145,917 129,619 Tunneling 32,076 33,377 96,602 66,009 Other 68,426 45,699 164,121 103,627 Total Civil segment revenue $ 524,546 $ 431,488 $ 1,331,698 $ 1,097,075 Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Building segment revenue by end market: Commercial and industrial facilities $ 121,206 $ 57,505 $ 345,752 $ 290,571 Health care facilities 58,323 127,219 199,347 320,416 Municipal and government 62,444 67,003 192,986 187,984 Hospitality and gaming 57,672 65,744 180,556 226,999 Mass transit 53,384 — 123,772 — Education facilities 33,469 43,405 123,059 108,763 Mixed use 2,183 40,758 26,774 121,348 Other 26,665 53,858 84,884 136,631 Total Building segment revenue $ 415,346 $ 455,492 $ 1,277,130 $ 1,392,712 Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Specialty Contractors segment revenue by end market: Mass transit $ 103,710 $ 63,457 $ 285,121 $ 216,808 Commercial and industrial facilities 51,471 48,601 139,112 136,892 Multi-unit residential 25,860 18,254 56,474 64,104 Education facilities 21,610 26,024 47,226 77,626 Mixed use 18,465 37,587 47,170 137,420 Health care facilities 5,217 12,873 26,116 43,861 Transportation 5,931 17,150 16,092 73,154 Other 17,189 12,211 46,968 31,726 Total Specialty Contractors segment revenue $ 249,453 $ 236,157 $ 664,279 $ 781,591 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by customer type: State and local agencies $ 420,839 $ 144,106 $ 136,191 $ 701,136 $ 341,067 $ 177,377 $ 99,913 $ 618,357 Private owners 70,855 234,350 108,476 413,681 63,477 225,225 124,186 412,888 Federal agencies 32,852 36,890 4,786 74,528 26,944 52,890 12,058 91,892 Total revenue $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by customer type: State and local agencies $ 1,059,384 $ 422,590 $ 347,517 $ 1,829,491 $ 894,613 $ 452,918 $ 312,541 $ 1,660,072 Private owners 189,325 733,103 301,446 1,223,874 134,891 790,330 423,280 1,348,501 Federal agencies 82,989 121,437 15,316 219,742 67,571 149,464 45,770 262,805 Total revenue $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by contract type: Fixed price $ 376,230 $ 144,514 $ 208,689 $ 729,433 $ 272,996 $ 91,972 $ 193,607 $ 558,575 Guaranteed maximum price 639 159,217 4,405 164,261 3,025 269,069 18,720 290,814 Unit price 142,253 2,922 25,193 170,368 141,917 9,938 7,939 159,794 Cost plus fee and other 5,424 108,693 11,166 125,283 13,550 84,513 15,891 113,954 Total revenue $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Specialty Specialty (in thousands) Civil Building Contractors Total Civil Building Contractors Total Revenue by contract type: Fixed price $ 969,041 $ 395,123 $ 551,779 $ 1,915,943 $ 716,826 $ 267,630 $ 675,526 $ 1,659,982 Guaranteed maximum price 4,517 551,399 15,326 571,242 11,200 801,537 51,762 864,499 Unit price 343,416 10,950 64,379 418,745 332,118 29,526 21,829 383,473 Cost plus fee and other 14,724 319,658 32,795 367,177 36,931 294,019 32,474 363,424 Total revenue $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378

Contract Assets and Liabiliti_2

Contract Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Contract Assets and Liabilities [Abstract]
Schedule of Contract Assets and Liabilities	As of September 30, As of December 31, (in thousands) 2019 2018 Retainage receivable $ 542,274 $ 478,744 Costs and estimated earnings in excess of billings: Claims 756,760 698,274 Unapproved change orders 334,125 354,000 Other unbilled costs and profits 68,448 90,021 Total costs and estimated earnings in excess of billings 1,159,333 1,142,295 Capitalized contract costs 60,290 37,404 Total contract assets $ 1,761,897 $ 1,658,443 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 towards completion. As of September 30, 2019, the amount of retainage receivables estimated by management to be collected beyond one year is approximately 39 % 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 11, Commitments and Contingencies , 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. 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 three and nine months ended September 30, 2019, $ 8.5 million and $ 22.8 million, respectively, of previously capitalized contract costs were amortized and recognized as expense on the related contracts. During the three and nine months ended September 30, 2018, $ 4.0 million and $ 12.2 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 Condensed Consolidated Balance Sheets consisted of the following: As of September 30, As of December 31, (in thousands) 2019 2018 Retainage payable $ 232,209 $ 211,956 Billings in excess of costs and estimated earnings 818,806 573,190 Total contract liabilities $ 1,051,015 $ 785,146

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2019
Cash, Cash Equivalents and Restricted Cash [Abstract]
Reconciliation of Cash, Cash Equivalents and Restricted Cash	As of September 30, As of December 31, (in thousands) 2019 2018 Cash and cash equivalents available for general corporate purposes $ 49,166 $ 51,749 Joint venture cash and cash equivalents 157,964 64,326 Cash and cash equivalents 207,130 116,075 Restricted cash 6,261 3,788 Total cash, cash equivalents and restricted cash $ 213,391 $ 119,863

Earnings Per Common Share (EP_2

Earnings Per Common Share (EPS) (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Common Share (EPS) [Abstract]
Calculations of the Basic and Diluted EPS	Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per common share data) 2019 2018 2019 2018 Net income (loss) attributable to Tutor Perini Corporation $ 19,313 $ 21,272 $ ( 301,573 ) $ 34,031 Weighted-average common shares outstanding, basic 50,279 50,018 50,201 49,927 Effect of dilutive restricted stock units and stock options 303 357 — 283 Weighted-average common shares outstanding, diluted 50,582 50,375 50,201 50,210 Net income (loss) attributable to Tutor Perini Corporation per common share: Basic $ 0.38 $ 0.43 $ ( 6.01 ) $ 0.68 Diluted $ 0.38 $ 0.42 $ ( 6.01 ) $ 0.68 Anti-dilutive securities not included above 1,665 2,107 3,458 2,765

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets [Abstract]
Schedule of Carrying Amount of Goodwill	Specialty (in thousands) Civil Building Contractors Total Gross goodwill $ 492,074 $ 424,724 $ 156,193 $ 1,072,991 Accumulated impairment ( 76,716 ) ( 411,269 ) — ( 487,985 ) Balance as of December 31, 2018 415,358 13,455 156,193 585,006 Second quarter 2019 impairment ( 210,215 ) ( 13,455 ) ( 156,193 ) ( 379,863 ) Balance as of September 30, 2019 (a) $ 205,143 $ — $ — $ 205,143 ____________________________________________________________________________________________________ (a) As of September 30, 2019, accumulated impairment was $ 867.8 million.
Schedule of Intangible Assets	As of September 30, 2019 Weighted Accumulated Average Accumulated Impairment Carrying Amortization (in thousands) Cost Amortization Charge Value Period Trade names (non-amortizable) $ 117,600 $ — $ ( 67,190 ) $ 50,410 Indefinite Trade names (amortizable) 74,350 ( 20,645 ) ( 23,232 ) 30,473 20 years Contractor license 6,000 — ( 6,000 ) — N/A Customer relationships 39,800 ( 20,784 ) ( 16,645 ) 2,371 12 years Construction contract backlog 73,706 ( 73,706 ) — — N/A Total $ 311,456 $ ( 115,135 ) $ ( 113,067 ) $ 83,254 As of December 31, 2018 Weighted Accumulated Average Accumulated Impairment Carrying Amortization (in thousands) Cost Amortization Charge Value Period Trade names (non-amortizable) $ 117,600 $ — $ ( 67,190 ) $ 50,410 Indefinite Trade names (amortizable) 74,350 ( 18,780 ) ( 23,232 ) 32,338 20 years Contractor license 6,000 — ( 6,000 ) — N/A Customer relationships 39,800 ( 19,992 ) ( 16,645 ) 3,163 12 years Construction contract backlog 73,706 ( 73,706 ) — — N/A Total $ 311,456 $ ( 112,478 ) $ ( 113,067 ) $ 85,911

Financial Commitments (Tables)

Financial Commitments (Tables)	9 Months Ended
	Sep. 30, 2019
Financial Commitments [Abstract]
Long-term Debt	As of September 30, As of December 31, (in thousands) 2019 2018 2017 Senior Notes $ 494,148 $ 493,521 2017 Credit Facility 117,000 41,000 Convertible Notes 179,494 171,481 Equipment financing and mortgages 40,475 50,904 Other indebtedness 5,127 4,598 Total debt 836,244 761,504 Less: Current maturities 10,862 16,767 Long-term debt, net $ 825,382 $ 744,737
Reconciliation of Outstanding Debt Balance to Reported Debt Balance	As of September 30, 2019 As of December 31, 2018 (in thousands) Outstanding Long-Term Debt Unamortized Discount and Issuance Costs Long-Term Debt, as reported Outstanding Long-Term Debt Unamortized Discount and Issuance Costs Long-Term Debt, as reported 2017 Senior Notes $ 500,000 $ ( 5,852 ) $ 494,148 $ 500,000 $ ( 6,479 ) $ 493,521 Convertible Notes 200,000 ( 20,506 ) 179,494 200,000 ( 28,519 ) 171,481
Summary of Interest Expense as Reported in the Condensed Consolidated Statements of Income	Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2019 2018 2019 2018 Cash interest expense: Interest on 2017 Senior Notes $ 8,594 $ 8,594 $ 25,781 $ 25,781 Interest on 2017 Credit Facility 3,385 2,596 9,712 6,300 Interest on Convertible Notes 1,438 1,437 4,313 4,312 Other interest 540 736 1,656 2,119 Total cash interest expense 13,957 13,363 41,462 38,512 Non-cash interest expense: (a) Amortization of discount and debt issuance costs on Convertible Notes 2,734 2,490 8,013 7,298 Amortization of debt issuance costs on 2017 Credit Facility 401 360 1,150 1,080 Amortization of debt issuance costs on 2017 Senior Notes 213 198 627 584 Total non-cash interest expense 3,348 3,048 9,790 8,962 Total interest expense $ 17,305 $ 16,411 $ 51,252 $ 47,474 ____________________________________________________________________________________________________ (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 and the Convertible Notes were 7.13 % and 9.39 %, respectively, for the nine months ended September 30, 2019.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Components of Lease Expense	Three Months Ended Nine Months Ended (in thousands) September 30, 2019 September 30, 2019 Operating lease expense $ 4,047 $ 11,749 Short-term lease expense (a) 17,786 50,843 21,833 62,592 Less: Sublease income 263 784 Total lease expense $ 21,570 $ 61,808 ____________________________________________________________________________________________________ (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 September 30, 2019: As of September 30, (dollars in thousands) Balance Sheet Line Item 2019 Assets ROU assets Other assets $ 41,186 Total lease assets $ 41,186 Liabilities Current lease liabilities Accrued expenses and other current liabilities $ 11,267 Long-term lease liabilities Other long-term liabilities 33,027 Total lease liabilities $ 44,294 Weighted-average remaining lease term (in years) 5.1 Weighted-average discount rate 5.88 % The following table presents supplemental cash flow information and non-cash activity related to operating leases for the nine months ended September 30, 2019: Nine Months Ended (in thousands) September 30, 2019 Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ ( 11,586 ) Non-cash activity: ROU assets obtained in exchange for lease liabilities $ 7,621
Maturity of Leases Liabilities on an Undiscounted Basis	Year (in thousands) Operating Leases 2019 (excluding the nine months ended September 30, 2019) $ 3,781 2020 12,339 2021 8,997 2022 7,695 2023 6,489 Thereafter 12,461 Total lease payments 51,762 Less: Imputed interest 7,468 Total $ 44,294
Future Minimum Rent Payments under Non-Cancelable Operating Leases	Year (in thousands) Operating Leases 2019 $ 14,039 2020 10,706 2021 7,464 2022 6,567 2023 5,587 Thereafter 11,662 56,025 Less: Sublease rental agreements 1,398 Total $ 54,627

Employee Pension Plans (Tables)

Employee Pension Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Employee Pension Plans [Abstract]
Components of Net Periodic Benefit Cost	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Interest cost $ 948 $ 883 $ 2,844 $ 2,649 Expected return on plan assets ( 1,043 ) ( 1,077 ) ( 3,129 ) ( 3,231 ) Amortization of net loss 463 513 1,389 1,539 Other 225 213 675 639 Net periodic benefit cost $ 593 $ 532 $ 1,779 $ 1,596

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Measurements [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	As of September 30, 2019 As of December 31, 2018 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) $ 207,130 $ — $ — $ 207,130 $ 116,075 $ — $ — $ 116,075 Restricted cash (a) 6,261 — — 6,261 3,788 — — 3,788 Restricted investments (b) — 67,728 — 67,728 — 58,142 — 58,142 Investments in lieu of retainage (c) 78,492 1,229 — 79,721 62,858 1,190 — 64,048 Total $ 291,883 $ 68,957 $ — $ 360,840 $ 182,721 $ 59,332 $ — $ 242,053 ____________________________________________________________________________________________________ (a) Includes money market funds and short-term investments with maturity dates of three months or less when acquired. (b) Restricted investments, as of September 30, 2019, consist of investments in corporate debt securities of $ 37.0 million and U.S. government agency securities of $ 30.7 million 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, 2018, restricted investments consisted of investments in corporate debt securities of $ 30.4 million and U.S. government agency securities of $ 27.7 million. The amortized cost of these available-for-sale securities at September 30, 2019 and December 31, 2018 was not materially different from the fair value. (c) Investments in lieu of retainage are included in retainage receivable and as of September 30, 2019 are comprised of money market funds of $ 78.5 million and municipal bonds of $ 1.2 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, 2018, investments in lieu of retainage consisted of money market funds of $ 62.9 million and municipal bonds of $ 1.2 million. The amortized cost of these available-for-sale securities at September 30, 2019 and December 31, 2018 was not materially different from the fair value.

Changes in Equity (Tables)

Changes in Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Changes in Equity [Abstract]
Schedule of Stockholders Equity	Three Months Ended September 30, 2019 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - June 30, 2019 $ 50,279 $ 1,110,496 $ 380,795 $ ( 42,530 ) $ ( 9,481 ) $ 1,489,559 Net income — — 19,313 — 7,408 26,721 Other comprehensive income (loss) — — — 236 ( 99 ) 137 Share-based compensation — 3,491 — — — 3,491 Contributions from noncontrolling interests — — — — 1,140 1,140 Distributions to noncontrolling interests — — — — ( 17,500 ) ( 17,500 ) Balance - September 30, 2019 $ 50,279 $ 1,113,987 $ 400,108 $ ( 42,294 ) $ ( 18,532 ) $ 1,503,548 Nine Months Ended September 30, 2019 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - December 31, 2018 $ 50,026 $ 1,102,919 $ 701,681 $ ( 45,449 ) $ ( 21,288 ) $ 1,787,889 Net income (loss) — — ( 301,573 ) — 17,577 ( 283,996 ) Other comprehensive income — — — 3,155 160 3,315 Share-based compensation — 13,586 — — — 13,586 Issuance of common stock, net 253 ( 2,518 ) — — — ( 2,265 ) Contributions from noncontrolling interests — — — — 6,519 6,519 Distributions to noncontrolling interests — — — — ( 21,500 ) ( 21,500 ) Balance - September 30, 2019 $ 50,279 $ 1,113,987 $ 400,108 $ ( 42,294 ) $ ( 18,532 ) $ 1,503,548 Three Months Ended September 30, 2018 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity Balance - June 30, 2018 $ 50,011 $ 1,093,874 $ 631,004 $ ( 44,805 ) $ ( 17,540 ) $ 1,712,544 Net income — — 21,272 — 4,164 25,436 Other comprehensive income — — — 612 — 612 Share-based compensation — 4,993 — — — 4,993 Issuance of common stock, net 15 ( 228 ) — — — ( 213 ) Distributions to noncontrolling interests — — — — ( 10,000 ) ( 10,000 ) Balance - September 30, 2018 $ 50,026 $ 1,098,639 $ 652,276 $ ( 44,193 ) $ ( 23,376 ) $ 1,733,372 Nine Months Ended September 30, 2018 Accumulated Additional Other Common Paid-in Retained Comprehensive Noncontrolling Total (in thousands) Stock Capital Earnings Loss Interests Equity 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 ) — ( 1,740 ) ( 5,502 ) Net income — — 34,031 — 8,359 42,390 Other comprehensive loss — — — ( 1,475 ) — ( 1,475 ) Share-based compensation — 17,264 — — — 17,264 Issuance of common stock, net 245 ( 2,830 ) — — — ( 2,585 ) Contributions from noncontrolling interests — — — — 1,000 1,000 Distributions to noncontrolling interests — — — — ( 22,500 ) ( 22,500 ) Balance - September 30, 2018 $ 50,026 $ 1,098,639 $ 652,276 $ ( 44,193 ) $ ( 23,376 ) $ 1,733,372

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
Other Comprehensive Income (Loss) [Abstract]
Schedule of Tax Effects of the Components of Other Comprehensive Income (Loss)	The tax effects of the components of other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended Three Months Ended September 30, 2019 September 30, 2018 (in thousands) 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 $ 464 $ ( 133 ) $ 331 $ 513 $ ( 148 ) $ 365 Foreign currency translation adjustments ( 590 ) 140 ( 450 ) 519 ( 143 ) 376 Unrealized gain (loss) in fair value of investments 328 ( 72 ) 256 ( 173 ) 44 ( 129 ) Total other comprehensive income (loss) 202 ( 65 ) 137 859 ( 247 ) 612 Less: Other comprehensive income attributable to noncontrolling interests (a) ( 99 ) — ( 99 ) — — — Total other comprehensive income (loss) attributable to Tutor Perini Corporation $ 301 $ ( 65 ) $ 236 $ 859 $ ( 247 ) $ 612 ____________________________________________________________________________________________________ (a) The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation. Nine Months Ended Nine Months Ended September 30, 2019 September 30, 2018 (in thousands) 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 $ 1,390 $ ( 398 ) $ 992 $ 1,539 $ ( 439 ) $ 1,100 Foreign currency translation adjustment 961 ( 253 ) 708 ( 2,034 ) 602 ( 1,432 ) Unrealized gain (loss) in fair value of investments 2,053 ( 438 ) 1,615 ( 1,468 ) 325 ( 1,143 ) Total other comprehensive income (loss) 4,404 ( 1,089 ) 3,315 ( 1,963 ) 488 ( 1,475 ) Less: Other comprehensive income (loss) attributable to noncontrolling interests (a) 160 — 160 — — — Total other comprehensive income (loss) attributable to Tutor Perini Corporation $ 4,244 $ ( 1,089 ) $ 3,155 $ ( 1,963 ) $ 488 $ ( 1,475 ) ____________________________________________________________________________________________________ (a) The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation.
Schedule of Changes in AOCI Balances by Component (After-Tax)	Three Months Ended September 30, 2019 Defined Unrealized Accumulated Benefit Foreign Gain in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of June 30, 2019 $ ( 38,009 ) $ ( 5,416 ) $ 895 $ ( 42,530 ) Other comprehensive income (loss) before reclassifications — ( 351 ) 254 ( 97 ) Amounts reclassified from AOCI 331 — 2 333 Total other comprehensive income 331 ( 351 ) 256 236 Balance as of September 30, 2019 $ ( 37,678 ) $ ( 5,767 ) $ 1,151 $ ( 42,294 ) Nine Months Ended September 30, 2019 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of December 31, 2018 $ ( 38,670 ) $ ( 6,315 ) $ ( 464 ) $ ( 45,449 ) Other comprehensive income before reclassifications — 548 1,633 2,181 Amounts reclassified from AOCI 992 — ( 18 ) 974 Total other comprehensive income 992 548 1,615 3,155 Balance as of September 30, 2019 $ ( 37,678 ) $ ( 5,767 ) $ 1,151 $ ( 42,294 ) The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the three and nine months ended September 30, 2018 were as follows: Three Months Ended September 30, 2018 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Fair Value of Comprehensive (in thousands) Plan Translation Investments, Net Income (Loss) Attributable to Tutor Perini Corporation: Balance as of June 30, 2018 $ ( 38,706 ) $ ( 5,399 ) $ ( 700 ) $ ( 44,805 ) Other comprehensive income (loss) before reclassifications — 376 ( 145 ) 231 Amounts reclassified from AOCI 365 — 16 381 Total other comprehensive income (loss) 365 376 ( 129 ) 612 Balance as of September 30, 2018 $ ( 38,341 ) $ ( 5,023 ) $ ( 829 ) $ ( 44,193 ) Nine Months Ended September 30, 2018 Defined Unrealized Accumulated Benefit Foreign Gain (Loss) in Other Pension Currency Value of Comprehensive (in thousands) Plan Translation Investments, Net 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 — ( 1,432 ) ( 1,159 ) ( 2,591 ) Amounts reclassified from AOCI 1,100 — 16 1,116 Total other comprehensive income (loss) 1,100 ( 1,432 ) ( 1,143 ) ( 1,475 ) Balance as of September 30, 2018 $ ( 38,341 ) $ ( 5,023 ) $ ( 829 ) $ ( 44,193 )

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2019
Business Segments [Abstract]
Reportable Segments	Reportable Segments Specialty Consolidated (in thousands) Civil Building Contractors Total Corporate Total Three Months Ended September 30, 2019 Total revenue $ 591,884 $ 421,241 $ 249,453 $ 1,262,578 $ — $ 1,262,578 Elimination of intersegment revenue ( 67,338 ) ( 5,895 ) — ( 73,233 ) — ( 73,233 ) Revenue from external customers $ 524,546 $ 415,346 $ 249,453 $ 1,189,345 $ — $ 1,189,345 Income (loss) from construction operations $ 50,695 $ 7,580 $ 7,247 $ 65,522 $ ( 17,579 ) (a) $ 47,943 Capital expenditures $ 22,497 $ 144 $ 325 $ 22,966 $ 365 $ 23,331 Depreciation and amortization (b) $ 11,953 $ 495 $ 1,018 $ 13,466 $ 2,761 $ 16,227 Three Months Ended September 30, 2018 Total revenue $ 479,581 $ 457,304 $ 236,157 $ 1,173,042 $ — $ 1,173,042 Elimination of intersegment revenue ( 48,093 ) ( 1,812 ) — ( 49,905 ) — ( 49,905 ) Revenue from external customers $ 431,488 $ 455,492 $ 236,157 $ 1,123,137 $ — $ 1,123,137 Income (loss) from construction operations $ 41,282 $ 8,853 $ 11,561 $ 61,696 $ ( 14,390 ) (a) $ 47,306 Capital expenditures $ 15,364 $ 277 $ 70 $ 15,711 $ 397 $ 16,108 Depreciation and amortization (b) $ 8,031 $ 488 $ 1,081 $ 9,600 $ 2,817 $ 12,417 ____________________________________________________________________________________________________ (a) Consists primarily of corporate general and administrative expenses. (b) Depreciation and amortization is included in income (loss) from construction operations. Reportable Segments Specialty Consolidated (in thousands) Civil Building Contractors Total Corporate Total Nine Months Ended September 30, 2019 Total revenue $ 1,516,623 $ 1,291,043 $ 664,279 $ 3,471,945 $ — $ 3,471,945 Elimination of intersegment revenue ( 184,925 ) ( 13,913 ) — ( 198,838 ) — ( 198,838 ) Revenue from external customers $ 1,331,698 $ 1,277,130 $ 664,279 $ 3,273,107 $ — $ 3,273,107 Income (loss) from construction operations $ ( 72,032 ) $ 6,903 $ ( 160,036 ) $ ( 225,165 ) (a) $ ( 45,696 ) (b) $ ( 270,861 ) Capital expenditures $ 60,948 $ 349 $ 558 $ 61,855 $ 822 $ 62,677 Depreciation and amortization (c) $ 31,608 $ 1,495 $ 3,143 $ 36,246 $ 8,295 $ 44,541 Nine Months Ended September 30, 2018 Total revenue $ 1,266,595 $ 1,395,896 $ 781,591 $ 3,444,082 $ — $ 3,444,082 Elimination of intersegment revenue ( 169,520 ) ( 3,184 ) — ( 172,704 ) — ( 172,704 ) Revenue from external customers $ 1,097,075 $ 1,392,712 $ 781,591 $ 3,271,378 $ — $ 3,271,378 Income (loss) from construction operations (d) $ 93,560 $ 27,814 $ 26,250 $ 147,624 $ ( 46,428 ) (b) $ 101,196 Capital expenditures $ 61,912 $ 1,147 $ 704 $ 63,763 $ 648 $ 64,411 Depreciation and amortization (c) $ 20,356 $ 1,458 $ 3,299 $ 25,113 $ 8,468 $ 33,581 ____________________________________________________________________________________________________ (a) During the nine months ended September 30, 2019, the Company recorded a non-cash goodwill impairment charge of $ 379.9 million in income (loss) from continuing operations (an unfavorable after-tax impact of $ 329.5 million, or $ 6.56 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 8, Goodwill and Intangible Assets ). (b) Consists primarily of corporate general and administrative expenses. (c) Depreciation and amortization is included in income (loss) from construction operations. (d) During the nine months ended September 30, 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 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.
Reconciliation of Segment Results to Consolidated Income Before Income Taxes	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Income (loss) from construction operations $ 47,943 $ 47,306 $ ( 270,861 ) $ 101,196 Other income, net 1,674 1,909 2,996 3,739 Interest expense ( 17,305 ) ( 16,411 ) ( 51,252 ) ( 47,474 ) Income (loss) before income taxes $ 32,312 $ 32,804 $ ( 319,117 ) $ 57,461
Schedule of Assets by Segment	As of As of (in thousands) September 30, 2019 December 31, 2018 Civil $ 2,791,537 $ 2,574,326 Building 965,917 913,746 Specialty Contractors 644,016 745,313 Corporate and other (a) 93,438 154,367 Total assets $ 4,494,908 $ 4,387,752 ____________________________________________________________________________________________________ (a) Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$ 90,943	$ 93,796	$ 50,523
Liabilities	44,294
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets		43,300
Liabilities		43,300
Reclassification [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$ 41,120	$ 43,273

Recent Accounting Pronounceme_4

Recent Accounting Pronouncements (Schedule of the Impact for the Adoption of ASU 842) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
ASSETS
Other assets	$ 90,943	$ 93,796	$ 50,523
LIABILITIES
Accrued expenses and other current liabilities	188,373	185,894	174,325
Other Long-term Liabilities	186,965	183,343	$ 151,639
Accounting Standards Update 2016-02 [Member]
ASSETS
Other assets		43,300
Accounting Standards Update 2016-02 [Member] | Balance Without Adoption Of ASC 842 [Member]
ASSETS
Other assets	49,823
LIABILITIES
Accrued expenses and other current liabilities	177,298
Other Long-term Liabilities	156,920
Accounting Standards Update 2016-02 [Member] | Reclassification [Member]
ASSETS
Other assets	41,120	43,273
LIABILITIES
Accrued expenses and other current liabilities	11,075	11,569
Other Long-term Liabilities	$ 30,045	$ 31,704

Revenue (Narrative) (Details)

Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenue recognized related to performance obligations satisfied (or partially satisfied) in prior periods	$ (13.8)	$ (46.3)
Civil [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	5.3	$ 5.3	$ 4.2
Civil [Member] | Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Range		3 years
Civil [Member] | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Range		5 years
Building [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	1.6	$ 1.6	2.1
Specialty Contractors [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2.2	$ 2.2	$ 1.7
Building And Specialty Contractors [Member] | Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Range		1 year
Building And Specialty Contractors [Member] | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Range		3 years

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Contracts Revenue	$ 1,189,345	$ 1,123,137	$ 3,273,107	$ 3,271,378
Civil [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	524,546	431,488	1,331,698	1,097,075
Civil [Member] | Mass Transit [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	265,671	177,619	655,541	485,841
Civil [Member] | Bridges [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	113,743	128,240	269,517	311,979
Civil [Member] | Highways [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	44,630	46,553	145,917	129,619
Civil [Member] | Tunneling [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	32,076	33,377	96,602	66,009
Civil [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	68,426	45,699	164,121	103,627
Building [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	415,346	455,492	1,277,130	1,392,712
Building [Member] | Commercial And Industrial Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	121,206	57,505	345,752	290,571
Building [Member] | Health Care Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	58,323	127,219	199,347	320,416
Building [Member] | Municipal And Government [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	62,444	67,003	192,986	187,984
Building [Member] | Education Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	33,469	43,405	123,059	108,763
Building [Member] | Hospitality And Gaming [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	57,672	65,744	180,556	226,999
Building [Member] | Mass Transit [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	53,384		123,772
Building [Member] | Mixed Use [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	2,183	40,758	26,774	121,348
Building [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	26,665	53,858	84,884	136,631
Specialty Contractors [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	249,453	236,157	664,279	781,591
Specialty Contractors [Member] | Commercial And Industrial Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	51,471	48,601	139,112	136,892
Specialty Contractors [Member] | Health Care Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	5,217	12,873	26,116	43,861
Specialty Contractors [Member] | Education Facilities [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	21,610	26,024	47,226	77,626
Specialty Contractors [Member] | Mass Transit [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	103,710	63,457	285,121	216,808
Specialty Contractors [Member] | Mixed Use [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	18,465	37,587	47,170	137,420
Specialty Contractors [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	5,931	17,150	16,092	73,154
Specialty Contractors [Member] | Multi-Unit Residential [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	25,860	18,254	56,474	64,104
Specialty Contractors [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	$ 17,189	$ 12,211	$ 46,968	$ 31,726

Revenue (Schedule of Revenue by

Revenue (Schedule of Revenue by Contract Type) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Contracts Revenue	$ 1,189,345	$ 1,123,137	$ 3,273,107	$ 3,271,378
Fixed Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	729,433	558,575	1,915,943	1,659,982
Guaranteed Maximum Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	164,261	290,814	571,242	864,499
Unit Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	170,368	159,794	418,745	383,473
Cost Plus Fee And Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	125,283	113,954	367,177	363,424
Civil [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	524,546	431,488	1,331,698	1,097,075
Civil [Member] | Fixed Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	376,230	272,996	969,041	716,826
Civil [Member] | Guaranteed Maximum Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	639	3,025	4,517	11,200
Civil [Member] | Unit Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	142,253	141,917	343,416	332,118
Civil [Member] | Cost Plus Fee And Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	5,424	13,550	14,724	36,931
Building [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	415,346	455,492	1,277,130	1,392,712
Building [Member] | Fixed Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	144,514	91,972	395,123	267,630
Building [Member] | Guaranteed Maximum Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	159,217	269,069	551,399	801,537
Building [Member] | Unit Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	2,922	9,938	10,950	29,526
Building [Member] | Cost Plus Fee And Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	108,693	84,513	319,658	294,019
Specialty Contractors [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	249,453	236,157	664,279	781,591
Specialty Contractors [Member] | Fixed Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	208,689	193,607	551,779	675,526
Specialty Contractors [Member] | Guaranteed Maximum Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	4,405	18,720	15,326	51,762
Specialty Contractors [Member] | Unit Price [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	25,193	7,939	64,379	21,829
Specialty Contractors [Member] | Cost Plus Fee And Other [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	11,166	15,891	32,795	32,474
State And Local Agencies [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	701,136	618,357	1,829,491	1,660,072
State And Local Agencies [Member] | Civil [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	420,839	341,067	1,059,384	894,613
State And Local Agencies [Member] | Building [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	144,106	177,377	422,590	452,918
State And Local Agencies [Member] | Specialty Contractors [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	136,191	99,913	347,517	312,541
Private Owners [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	413,681	412,888	1,223,874	1,348,501
Private Owners [Member] | Civil [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	70,855	63,477	189,325	134,891
Private Owners [Member] | Building [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	234,350	225,225	733,103	790,330
Private Owners [Member] | Specialty Contractors [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	108,476	124,186	301,446	423,280
Federal Agencies [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	74,528	91,892	219,742	262,805
Federal Agencies [Member] | Civil [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	32,852	26,944	82,989	67,571
Federal Agencies [Member] | Building [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	36,890	52,890	121,437	149,464
Federal Agencies [Member] | Specialty Contractors [Member]
Disaggregation of Revenue [Line Items]
Contracts Revenue	$ 4,786	$ 12,058	$ 15,316	$ 45,770

Contract Assets and Liabiliti_3

Contract Assets and Liabilities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Contract Assets and Liabilities [Abstract]
Retainage receivable estimated by management to be collected beyond one year, percentage			39.00%
Capitalized contract costs were amortized and recognized as expense	$ 8.5	$ 4	$ 22.8	$ 12.2
Retainage payable estimated by management to be remitted beyond one year, percentage			30.00%
Contract with Customer, Liability, Revenue Recognized	$ 322.8	$ 251.4	$ 437.1	$ 341.2

Contract Assets and Liabiliti_4

Contract Assets and Liabilities (Schedule of Contract Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Contract Assets and Liabilities [Abstract]
Retainage receivable	$ 542,274	$ 478,744
Claims	756,760	698,274
Unapproved change orders	334,125	354,000
Other unbilled costs and profits	68,448	90,021
Total costs and estimated earnings in excess of billings	1,159,333	1,142,295
Capitalized contract costs	60,290	37,404
Total contract assets	$ 1,761,897	$ 1,658,443

Contract Assets and Liabiliti_5

Contract Assets and Liabilities (Schedule of Contract Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Contract Assets and Liabilities [Abstract]
Retainage payable	$ 232,209	$ 211,956
Billings in excess of costs and estimated earnings	818,806	573,190
Total contract liabilities	$ 1,051,015	$ 785,146

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Cash, Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	$ 207,130	$ 116,075
Restricted cash	6,261	3,788
Total cash, cash equivalents and restricted cash	213,391	119,863	$ 121,694	$ 197,648
Tutor Perini Corporation [Member]
Cash, Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	49,166	51,749
Joint Venture [Member]
Cash, Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	$ 157,964	$ 64,326

Earnings Per Common Share (EP_3

Earnings Per Common Share (EPS) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill, Impairment Loss	$ 0	$ 379,863	$ 0	$ 379,863	$ 0
Net income (loss)	$ 26,721		$ 25,436	$ (283,996)	$ 42,390
Earnings Per Share, Diluted	$ 0.38		$ 0.42	$ (6.01)	$ 0.68
Scenario Unfavorable Adjustment [Member]
Net income (loss)				$ 329,500
Earnings Per Share, Diluted				$ 6.56

Earnings Per Common Share (EP_4

Earnings Per Common Share (EPS) (Calculations of the Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Common Share (EPS) [Abstract]
Net income (loss) attributable to Tutor Perini Corporation	$ 19,313	$ 21,272	$ (301,573)	$ 34,031
Weighted-average common shares outstanding, basic	50,279	50,018	50,201	49,927
Effect of dilutive restricted stock units and stock options	303	357		283
Weighted-average common shares outstanding, diluted	50,582	50,375	50,201	50,210
Net income (loss) attributable to Tutor Perini Corporation per common share: Basic	$ 0.38	$ 0.43	$ (6.01)	$ 0.68
Net income (loss) attributable to Tutor Perini Corporation per common share: Diluted	$ 0.38	$ 0.42	$ (6.01)	$ 0.68
Anti-dilutive securities not included above	1,665	2,107	3,458	2,765

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Effective income tax rate	17.30%		22.50%	11.00%	26.20%
Goodwill, Impairment Loss	$ 0	$ 379,863	$ 0	$ 379,863	$ 0
Goodwill Yielding Permanent Differences Between Book Income And Taxable Income	$ 209,500			209,500
Goodwill Impairment Tax Benefit				50,400
Amount recorded as deferred tax asset / reduction of previously recorded deferred tax liability				$ 50,300
Excluding Impact Of Goodwill Impairment Charge [Member]
Income Tax Contingency [Line Items]
Effective income tax rate				25.10%

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Narrative) (Details) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segment	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)segment
Goodwill [Line Items]
Number of reportable segments | segment				3		3
Goodwill	$ 205,143			$ 205,143		$ 585,006
Goodwill, Impairment Loss	0	$ 379,863	$ 0	379,863	$ 0
Amortization expense	900		$ 900	2,657	$ 2,657
Remainder of 2019	900			900
2020	3,500			3,500
2021	3,400			3,400
2022	2,600			2,600
2023	2,500			2,500
2024	2,500			2,500
Specialty Contractors [Member]
Goodwill [Line Items]
Goodwill	0			0		156,193
Goodwill, Impairment Loss		156,193
Civil [Member]
Goodwill [Line Items]
Goodwill	205,143			205,143		415,358
Goodwill, Impairment Loss		210,215
Building [Member]
Goodwill [Line Items]
Goodwill	$ 0			$ 0		$ 13,455
Goodwill, Impairment Loss		$ 13,455

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Schedule of Carrying Amount of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill
Gross Goodwill Balance						$ 1,072,991
Accumulated Impairment	$ (867,800)			$ (867,800)		(487,985)
Impairment charge	0	$ (379,863)	$ 0	(379,863)	$ 0
Goodwill	205,143			205,143		585,006
Civil [Member]
Goodwill
Gross Goodwill Balance						492,074
Accumulated Impairment						(76,716)
Impairment charge		(210,215)
Goodwill	205,143			205,143		415,358
Building [Member]
Goodwill
Gross Goodwill Balance						424,724
Accumulated Impairment						(411,269)
Impairment charge		(13,455)
Goodwill	0			0		13,455
Specialty Contractors [Member]
Goodwill
Gross Goodwill Balance						156,193
Accumulated Impairment						0
Impairment charge		$ (156,193)
Goodwill	$ 0			$ 0		$ 156,193

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Schedule of Indefinite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Trade Names [Member]
Indefinite-lived intangible assets
Cost	$ 117,600	$ 117,600
Accumulated Impairment Charge	(67,190)	(67,190)
Carrying Value	50,410	50,410
Contractor License [Member]
Indefinite-lived intangible assets
Cost	6,000	6,000
Accumulated Impairment Charge	(6,000)	(6,000)
Carrying Value	$ 0	$ 0

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived intangible assets
Cost	$ 311,456	$ 311,456
Accumulated Amortization	(115,135)	(112,478)
Accumulated Impairment Charge	(113,067)	(113,067)
Carrying Value	83,254	85,911
Trade Names [Member]
Finite-Lived intangible assets
Cost	74,350	74,350
Accumulated Amortization	(20,645)	(18,780)
Accumulated Impairment Charge	(23,232)	(23,232)
Carrying Value	$ 30,473	$ 32,338
Weighted Average Amortization Period	20 years	20 years
Customer Relationships [Member]
Finite-Lived intangible assets
Cost	$ 39,800	$ 39,800
Accumulated Amortization	(20,784)	(19,992)
Accumulated Impairment Charge	(16,645)	(16,645)
Carrying Value	$ 2,371	$ 3,163
Weighted Average Amortization Period	12 years	12 years
Construction Contract Backlog [Member]
Finite-Lived intangible assets
Cost	$ 73,706	$ 73,706
Accumulated Amortization	(73,706)	(73,706)
Accumulated Impairment Charge	0	0
Carrying Value	$ 0	$ 0

Financial Commitments (Narrativ

Financial Commitments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2019USD ($)d / item$ / sharesshares	May 07, 2019	Dec. 31, 2018USD ($)
Senior Notes [Member] | Private Placement [Member] | 2017 Senior Notes [Member]
Debt Instrument [Line Items]
Face amount	$ 500,000,000
Interest rate	6.875%
Redemption price, change of control triggering event (as a percent)	101.00%
Senior Notes [Member] | Circumstance One [Member] | Private Placement [Member] | 2017 Senior Notes [Member]
Debt Instrument [Line Items]
Redemption price	100.00%
Senior Notes [Member] | Circumstance Two [Member] | Private Placement [Member] | 2017 Senior Notes [Member]
Debt Instrument [Line Items]
Redemption price	106.875%
Percentage of notes that can be redeemed	40.00%
Convertible Notes [Member]
Debt Instrument [Line Items]
Face amount	$ 200,000,000
Interest rate	2.875%
Maturity date	Jun. 15, 2021
Conversion price, principal amount	$ 1,000
Conversion price, shares | shares	33.0579
Conversion price | $ / shares	$ 30.25
Convertible Notes [Member] | Circumstance One [Member]
Debt Instrument [Line Items]
Business day period after consecutive trading day period	5 days
Consecutive trading day period | d / item	10
Conversion price, principal amount	$ 1,000
Percentage of conversion price	98.00%
Convertible Notes [Member] | Circumstance Two [Member]
Debt Instrument [Line Items]
Consecutive trading day period | d / item	30
Percentage of conversion price	130.00%
Business day period within consecutive trading day period | d / item	20
Conversion stock price trigger | $ / shares	$ 39.32
Conversion price, shares | shares	33.0579
Minimum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	3.25
Maximum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio			3.50
Credit Facility [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 350,000,000
Available borrowing capacity	233,000,000
Additional borrowing	$ 150,000,000
Line of Credit Facility, Expiration Date	Apr. 20, 2022
Applicable margin and letter of credit fees will be increased percentage per annum.	2.00%
Weighted-average annual interest rate on borrowings	5.03%
Fixed charge coverage ratio	1.25
Debt issuance costs	$ 4,100,000		$ 4,800,000
Credit Facility [Member] | Letters Of Credit [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	150,000,000
Credit Facility [Member] | Swingline Loans [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Face amount	$ 10,000,000
Credit Facility [Member] | Minimum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	3.25
Credit Facility [Member] | Maximum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	4
Credit Facility [Member] | Maximum [Member] | Amendment To 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio		3.50
LIBOR [Member] | Credit Facility [Member] | Minimum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	1.50%
LIBOR [Member] | Credit Facility [Member] | Maximum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	3.00%
Base Rate [Member] | Credit Facility [Member] | Circumstance Three [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	1.00%
Base Rate [Member] | Credit Facility [Member] | Circumstance Four [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	0.00%
Base Rate [Member] | Credit Facility [Member] | Minimum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	0.50%
Base Rate [Member] | Credit Facility [Member] | Maximum [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	2.00%
Federal Funds Rate [Member] | Credit Facility [Member] | Circumstance Two [Member] | 2017 Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent))	0.50%

Financial Commitments (Long-Ter

Financial Commitments (Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 836,244	$ 761,504
Less: Current maturities	10,862	16,767
Long-term debt, net	825,382	744,737
Convertible Notes [Member]
Debt Instrument [Line Items]
Total debt	179,494	171,481
Equipment Financing And Mortgages [Member]
Debt Instrument [Line Items]
Total debt	40,475	50,904
Other Indebtedness [Member]
Debt Instrument [Line Items]
Total debt	5,127	4,598
2017 Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	494,148	493,521
2017 Credit Facility [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	$ 117,000	$ 41,000

Financial Commitments (Reconcil

Financial Commitments (Reconciliation of Outstanding Debt Balance to Reported Debt Balance) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Unamortized Discount and Issuance Costs	$ (26,358)	$ (34,998)
Total debt	836,244	761,504
Convertible Notes [Member]
Debt Instrument [Line Items]
Outstanding Long-Term Debt	200,000	200,000
Unamortized Discount and Issuance Costs	(20,506)	(28,519)
Total debt	179,494	171,481
2017 Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Outstanding Long-Term Debt	500,000	500,000
Unamortized Discount and Issuance Costs	(5,852)	(6,479)
Total debt	$ 494,148	$ 493,521

Financial Commitments (Summary

Financial Commitments (Summary of Interest Expense as Reported in the Condensed Consolidated Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Debt Instrument [Line Items]
Interest on debt	$ 13,957	$ 13,363	$ 41,462	$ 38,512
Other interest	540	736	1,656	2,119
Total non-cash interest expense	3,348	3,048	9,790	8,962
Total interest expense	17,305	16,411	51,252	47,474
Convertible Notes [Member]
Debt Instrument [Line Items]
Interest on debt	1,438	1,437	4,313	4,312
Total non-cash interest expense	$ 2,734	2,490	$ 8,013	7,298
Effective interest rates	9.39%		9.39%
2017 Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest on debt	$ 8,594	8,594	$ 25,781	25,781
Total non-cash interest expense	$ 213	198	$ 627	584
Effective interest rates	7.13%		7.13%
2017 Credit Facility [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest on debt	$ 3,385	2,596	$ 9,712	6,300
Total non-cash interest expense	$ 401	$ 360	$ 1,150	$ 1,080

Leases (Narrative) (Details)

Leases (Narrative) (Details)	Sep. 30, 2019
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	10 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	1 year

Leases (Components of Lease Exp

Leases (Components of Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 4,047	$ 11,749
Short-term lease expense	17,786	50,843
Lease expense, gross	21,833	62,592
Less: Sublease income	263	784
Total lease expense	$ 21,570	$ 61,808
Maximum [Member]
Lessee, Lease, Description [Line Items]
Short-term lease, lease term		1 year
Minimum [Member]
Lessee, Lease, Description [Line Items]
Short-term lease, lease term		1 month

Leases (Supplemental Balance Sh

Leases (Supplemental Balance Sheet Information Related to Leases) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
ROU assets	$ 41,186
Current lease liabilities	11,267
Long-term lease liabilities	33,027
Total	$ 44,294
Weighted average remaining lease term (in years)	5 years 1 month 6 days
Weighted-average discount rate	5.88%

Leases (Supplemental Cash Flow

Leases (Supplemental Cash Flow and Other Information Related to Leases) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Cash paid for amount included in the measurement of lease liabilities	$ (11,586)
ROU assets obtained in exchange for lease liabilities	$ 7,621

Leases (Maturity of Leases Liab

Leases (Maturity of Leases Liabilities on an Undiscounted Basis) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
2019 (excluding the nine months ended September 30, 2019)	$ 3,781
2020	12,339
2021	8,997
2022	7,695
2023	6,489
Thereafter	12,461
Total lease payments	51,762
Less: Imputed interest	7,468
Total	$ 44,294

Leases (Future Minimum Rent Pay

Leases (Future Minimum Rent Payments under Non-Cancelable Operating Leases) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 14,039
2020	10,706
2021	7,464
2022	6,567
2023	5,587
Thereafter	11,662
Subtotal	56,025
Less: Sublease rental agreements	1,398
Total	$ 54,627

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions

Jun. 04, 2019

Feb. 26, 2015

Mar. 31, 2016

Jun. 30, 2015

Aug. 31, 2013

Mar. 31, 2012

Sep. 30, 2019

Jul. 02, 2018

Mar. 31, 2018

May 31, 2012

Sep. 30, 2011

Feb. 28, 2006

George Washington Bridge Bus Station Matter [Member]

Loss Contingencies [Line Items]

Value of claim filed

$ 113

George Washington Bridge Bus Station Matter [Member] | Return Of Retainage By Developer [Member]

Loss Contingencies [Line Items]

Value of counterclaim filed

$ 29

Long Island Expressway/Cross Island Parkway Matter [Member]

Loss Contingencies [Line Items]

Estimated value of project completed in Feb. 2006

$ 130

Value of claim filed

$ 50.7

Amount receivable as per final agreement

$ 0.5

Value of counterclaim filed

$ 151

Alaska Way Viaduct Matter [Member]

Loss Contingencies [Line Items]

Ownership percentage in joint venture

45.00%

Value of claim filed

$ 57.2

$ 532

Value of counterclaim filed

$ 667

George Washington Bridge Bus Station Matter [Member]

Loss Contingencies [Line Items]

Value of claim filed

$ 30

Value of project

$ 100

Court issued writ of attachment, amount

$ 23

Minimum [Member] | George Washington Bridge Bus Station Matter [Member]

Loss Contingencies [Line Items]

Value of counterclaim filed

$ 113

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-Based Compensation [Line Items]
Number of shares available for grant	1,368,243		1,368,243
Share-based compensation expense	$ 4,300,000	$ 5,700,000	$ 14,331,000	$ 17,779,000
Unamortized share-based compensation expense	$ 22,800,000		$ 22,800,000
Weighted average period over which unrecognized compensation cost is expected to be recognized			2 years 1 month 6 days
Restricted Stock Units [Member]
Share-Based Compensation [Line Items]
Units granted			400,000	614,000
Weighted-average per share prices			$ 20.90	$ 25.19
Stock Options [Member]
Share-Based Compensation [Line Items]
Stock options awarded			135,000	579,000
Weighted-average exercise prices			$ 20.94	$ 23.99
Stock options expired			839,711
Weighted-average exercise prices, expired			$ 20.78
Weighted average grant date fair value			$ 6.84	$ 11.45
Expected life			5 years 9 months 18 days
Expected volatility			38.17%
Risk-free rate			2.31%
Quarterly dividends			$ 0
Unrestricted Stock Units [Member]
Share-Based Compensation [Line Items]
Units granted			98,591	115,420
Weighted-average per share prices			$ 15.72	$ 21.26

Employee Pension Plans (Compone

Employee Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of net periodic benefit cost
Interest cost	$ 948	$ 883	$ 2,844	$ 2,649
Expected return on plan assets	(1,043)	(1,077)	(3,129)	(3,231)
Amortization of net loss	463	513	1,389	1,539
Other	225	213	675	639
Net periodic benefit cost	593	$ 532	1,779	1,596
Company contribution			3,300	$ 2,100
Expected contributions remainder of current fiscal year	$ 1,300		$ 1,300

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Convertible Notes [Member]
Long-term Debt
Long-term debt, fair value	$ 190.3	$ 184.4
2017 Senior Notes [Member] | Senior Notes [Member]
Long-term Debt
Long-term debt, fair value	$ 486	$ 466.8

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Municipal Bonds [Member]
Assets:
Investments in lieu of retainage	$ 1,200	$ 1,200
Money Market Funds [Member]
Assets:
Investments in lieu of retainage	78,500	62,900
US Government Agencies Debt Securities [Member]
Assets:
Restricted and other investments	30,700	27,700
Corporate Debt Securities [Member]
Assets:
Restricted and other investments	37,000	30,400
Fair Value Measured On A Recurring Basis [Member]
Assets:
Cash and cash equivalents	207,130	116,075
Restricted cash	6,261	3,788
Restricted investments	67,728	58,142
Investments in lieu of retainage	79,721	64,048
Total assets	360,840	242,053
Fair Value Measured On A Recurring Basis [Member] | Quoted Prices In Active Markets (Level 1) [Member]
Assets:
Cash and cash equivalents	207,130	116,075
Restricted cash	6,261	3,788
Investments in lieu of retainage	78,492	62,858
Total assets	291,883	182,721
Fair Value Measured On A Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Restricted investments	67,728	58,142
Investments in lieu of retainage	1,229	1,190
Total assets	$ 68,957	$ 59,332
Maximum [Member]
Assets:
Restricted And other investments, term	5 years

Variable Interest Entities (V_2

Variable Interest Entities (VIEs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Variable Interest Entity [Line Items]
Assets, Current	$ 3,605,582		$ 3,605,582		$ 3,175,643
Liabilities, Current	1,920,708		1,920,708		1,597,966
REVENUE	1,189,345	$ 1,123,137	3,273,107	$ 3,271,378
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets, Current	372,600		372,600		173,900
Assets, Noncurrent	56,800		56,800		51,500
Liabilities, Current	526,800		$ 526,800		319,900
Parsons Corporation (“Parsons”) [Member] | Newark Airport Terminal One Design-Build Project [Member]
Variable Interest Entity [Line Items]
Percent interest in the joint venture			80.00%
Noncontrolling interest party's ownership percentage			20.00%
Parsons Corporation (“Parsons”) [Member] | Newark Airport Terminal One Design-Build Project [Member] | Plan [Member]
Variable Interest Entity [Line Items]
REVENUE			$ 1,400,000
O&G [Member] | Purple Line Segment 2 Expansion Project [Member]
Variable Interest Entity [Line Items]
Related party's ownership percentage in joint venture			25.00%
Percent interest in the joint venture			75.00%
O&G [Member] | Purple Line Extension Section 2 And Section 3 [Member] | Plan [Member]
Variable Interest Entity [Line Items]
REVENUE			$ 2,800,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets, Current	500		500		4,000
Liabilities, Current	$ 400		$ 400		$ 3,800

Changes in Equity (Details)

Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	$ 1,489,559	$ 1,712,544	$ 1,787,889	$ 1,704,780
Cumulative effect of accounting change		(5,502)		(5,502)
Net income (loss)	26,721	25,436	(283,996)	42,390
Other comprehensive income (loss)	137	612	3,315	(1,475)
Share-based compensation	3,491	4,993	13,586	17,264
Issuance of common stock, net		(213)	(2,265)	(2,585)
Contributions from noncontrolling interests	1,140		6,519	1,000
Distributions to noncontrolling interests	(17,500)	(10,000)	(21,500)	(22,500)
Balance at the end of the period	1,503,548	1,733,372	1,503,548	1,733,372
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	50,279	50,011	50,026	49,781
Issuance of common stock, net		15	253	245
Balance at the end of the period	50,279	50,026	50,279	50,026
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	1,110,496	1,093,874	1,102,919	1,084,205
Share-based compensation	3,491	4,993	13,586	17,264
Issuance of common stock, net		(228)	(2,518)	(2,830)
Balance at the end of the period	1,113,987	1,098,639	1,113,987	1,098,639
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	380,795	631,004	701,681	622,007
Cumulative effect of accounting change		(3,762)		(3,762)
Net income (loss)	19,313	21,272	(301,573)	34,031
Balance at the end of the period	400,108	652,276	400,108	652,276
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(42,530)	(44,805)	(45,449)	(42,718)
Other comprehensive income (loss)	236	612	3,155	(1,475)
Balance at the end of the period	(42,294)	(44,193)	(42,294)	(44,193)
Noncontrolling Interests [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(9,481)	(17,540)	(21,288)	(8,495)
Cumulative effect of accounting change		(1,740)		(1,740)
Net income (loss)	7,408	4,164	17,577	8,359
Other comprehensive income (loss)	(99)		160
Contributions from noncontrolling interests	1,140		6,519	1,000
Distributions to noncontrolling interests	(17,500)	(10,000)	(21,500)	(22,500)
Balance at the end of the period	$ (18,532)	$ (23,376)	$ (18,532)	$ (23,376)

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) (Schedule of Tax Effects of the Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income (Loss) [Abstract]
Defined benefit pension plan adjustments, Before-Tax Amount	$ 464	$ 513	$ 1,390	$ 1,539
Defined benefit pension plan adjustments, Tax (Expense) Benefit	(133)	(148)	(398)	(439)
Defined benefit pension plan adjustments, Net-of-Tax Amount	331	365	992	1,100
Foreign currency translation adjustments, Before-Tax Amount	(590)	519	961	(2,034)
Foreign currency translation adjustments, Tax (Expense) Benefit	140	(143)	(253)	602
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	(450)	376	708	(1,432)
Unrealized gain (loss) in fair value of investments, Before-Tax Amount	328	(173)	2,053	(1,468)
Unrealized gain (loss) in fair value of investments, Tax (Expense) Benefit	(72)	44	(438)	325
Unrealized gain (loss) in fair value of investments, Net-of-Tax Amount	256	(129)	1,615	(1,143)
Total other comprehensive income (loss), Before-Tax Amount	202	859	4,404	(1,963)
Total other comprehensive income (loss), Tax (Expense) Benefit	(65)	(247)	(1,089)	488
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	137	612	3,315	(1,475)
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Before-of-Tax Amount	(99)	0	160	0
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Tax (Expense) Benefit	0	0	0	0
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax Amount	(99)	0	160	0
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Before-Tax Amount	301	859	4,244	(1,963)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Tax (Expense) Benefit	(65)	(247)	(1,089)	488
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ 236	$ 612	$ 3,155	$ (1,475)

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) (Schedule of Changes in AOCI Balances by Component (After-Tax)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period			$ 1,809,177
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ 236	$ 612	3,155	$ (1,475)
Balance at the end of the period	1,522,080		1,522,080
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(38,009)	(38,706)	(38,670)	(39,441)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI	331	365	992	1,100
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	331	365	992	1,100
Balance at the end of the period	(37,678)	(38,341)	(37,678)	(38,341)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(5,416)	(5,399)	(6,315)	(3,591)
Other comprehensive income (loss) before reclassifications	(351)	376	548	(1,432)
Amounts reclassified from AOCI	0	0	0	0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(351)	376	548	(1,432)
Balance at the end of the period	(5,767)	(5,023)	(5,767)	(5,023)
Unrealized Gain (Loss) in Fair Value of Investments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	895	(700)	(464)	314
Other comprehensive income (loss) before reclassifications	254	(145)	1,633	(1,159)
Amounts reclassified from AOCI	2	16	(18)	16
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	256	(129)	1,615	(1,143)
Balance at the end of the period	1,151	(829)	1,151	(829)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(42,530)	(44,805)	(45,449)	(42,718)
Other comprehensive income (loss) before reclassifications	(97)	231	2,181	(2,591)
Amounts reclassified from AOCI	333	381	974	1,116
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	236	612	3,155	(1,475)
Balance at the end of the period	$ (42,294)	$ (44,193)	$ (42,294)	$ (44,193)

Business Segments (Narrative) (

Business Segments (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)$ / shares	Sep. 30, 2018USD ($)$ / shares	Sep. 30, 2019USD ($)segment$ / shares	Sep. 30, 2018USD ($)$ / shares	Dec. 31, 2018segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3		3
Operating Income (Loss)	$ 47,943	$ 47,306	$ (270,861)	$ 101,196
Net income (loss)	$ 26,721	$ 25,436	$ (283,996)	$ 42,390
DILUTED EARNINGS (LOSS) PER COMMON SHARE | $ / shares	$ 0.38	$ 0.42	$ (6.01)	$ 0.68
Scenario Unfavorable Adjustment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)			$ 379,900
Net income (loss)			$ 329,500
DILUTED EARNINGS (LOSS) PER COMMON SHARE | $ / shares			$ 6.56
Building [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ 7,580	$ 8,853	$ 6,903	$ 27,814
Civil [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	50,695	41,282	(72,032)	93,560
Civil [Member] | Scenario Unfavorable Adjustment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)				17,800
Net income (loss)				$ 12,800
DILUTED EARNINGS (LOSS) PER COMMON SHARE | $ / shares				$ 0.25
Specialty Contractors [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	7,247	11,561	(160,036)	$ 26,250
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ (17,579)	$ (14,390)	$ (45,696)	$ (46,428)

Business Segments (Reportable S

Business Segments (Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Segments [Line items]
Revenue	$ 1,189,345	$ 1,123,137	$ 3,273,107	$ 3,271,378
Income (loss) from construction operations	47,943	47,306	(270,861)	101,196
Capital expenditures	23,331	16,108	62,677	64,411
Depreciation and amortization	16,227	12,417	44,541	33,581
External And Intersegment Customers [Member]
Business Segments [Line items]
Revenue	1,262,578	1,173,042	3,471,945	3,444,082
Elimination Of Intersegment Revenues [Member]
Business Segments [Line items]
Revenue	(73,233)	(49,905)	(198,838)	(172,704)
Reportable Segments [Member]
Business Segments [Line items]
Revenue	1,189,345	1,123,137	3,273,107	3,271,378
Income (loss) from construction operations	65,522	61,696	(225,165)	147,624
Capital expenditures	22,966	15,711	61,855	63,763
Depreciation and amortization	13,466	9,600	36,246	25,113
Reportable Segments [Member] | External And Intersegment Customers [Member]
Business Segments [Line items]
Revenue	1,262,578	1,173,042	3,471,945	3,444,082
Reportable Segments [Member] | Elimination Of Intersegment Revenues [Member]
Business Segments [Line items]
Revenue	(73,233)	(49,905)	(198,838)	(172,704)
Civil [Member]
Business Segments [Line items]
Revenue	524,546	431,488	1,331,698	1,097,075
Income (loss) from construction operations	50,695	41,282	(72,032)	93,560
Capital expenditures	22,497	15,364	60,948	61,912
Depreciation and amortization	11,953	8,031	31,608	20,356
Civil [Member] | External And Intersegment Customers [Member]
Business Segments [Line items]
Revenue	591,884	479,581	1,516,623	1,266,595
Civil [Member] | Elimination Of Intersegment Revenues [Member]
Business Segments [Line items]
Revenue	(67,338)	(48,093)	(184,925)	(169,520)
Building [Member]
Business Segments [Line items]
Revenue	415,346	455,492	1,277,130	1,392,712
Income (loss) from construction operations	7,580	8,853	6,903	27,814
Capital expenditures	144	277	349	1,147
Depreciation and amortization	495	488	1,495	1,458
Building [Member] | External And Intersegment Customers [Member]
Business Segments [Line items]
Revenue	421,241	457,304	1,291,043	1,395,896
Building [Member] | Elimination Of Intersegment Revenues [Member]
Business Segments [Line items]
Revenue	(5,895)	(1,812)	(13,913)	(3,184)
Specialty Contractors [Member]
Business Segments [Line items]
Revenue	249,453	236,157	664,279	781,591
Income (loss) from construction operations	7,247	11,561	(160,036)	26,250
Capital expenditures	325	70	558	704
Depreciation and amortization	1,018	1,081	3,143	3,299
Specialty Contractors [Member] | External And Intersegment Customers [Member]
Business Segments [Line items]
Revenue	249,453	236,157	664,279	781,591
Corporate [Member]
Business Segments [Line items]
Income (loss) from construction operations	(17,579)	(14,390)	(45,696)	(46,428)
Capital expenditures	365	397	822	648
Depreciation and amortization	$ 2,761	$ 2,817	$ 8,295	$ 8,468

Business Segments (Reconciliati

Business Segments (Reconciliation of Segment Results to Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Segments [Abstract]
Income (loss) from construction operations	$ 47,943	$ 47,306	$ (270,861)	$ 101,196
Other income, net	1,674	1,909	2,996	3,739
Interest expense	(17,305)	(16,411)	(51,252)	(47,474)
INCOME (LOSS) BEFORE INCOME TAXES	$ 32,312	$ 32,804	$ (319,117)	$ 57,461

Business Segments (Schedule of

Business Segments (Schedule of Assets by Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Reportable segment information
Total Assets	$ 4,494,908	$ 4,387,752
Civil [Member]
Reportable segment information
Total Assets	2,791,537	2,574,326
Building [Member]
Reportable segment information
Total Assets	965,917	913,746
Specialty Contractors [Member]
Reportable segment information
Total Assets	644,016	745,313
Corporate and Other [Member]
Reportable segment information
Total Assets	$ 93,438	$ 154,367