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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Segment Reporting [Abstract] |
Information About Reportable Segments | The following tables present financial information for each of our reportable segments for the years ended December 31, 2023, 2022, and 2021 (in thousands):
| 2023 |  | 2022 |  | 2021
Revenues from unrelated entities: |  |  |  |  |
United States electrical construction and facilities services | $ | 2,783,723 |  |  | $ | 2,433,114 |  |  | $ | 2,029,893 |
United States mechanical construction and facilities services | 5,074,803 |  |  | 4,292,208 |  |  | 3,922,200 |
United States building services | 3,120,134 |  |  | 2,754,953 |  |  | 2,455,129 |
United States industrial services | 1,167,790 |  |  | 1,118,767 |  |  | 986,407 |
Total United States operations | 12,146,450 |  |  | 10,599,042 |  |  | 9,393,629 |
United Kingdom building services | 436,423 |  |  | 477,078 |  |  | 509,951 |
Total operations | $ | 12,582,873 |  |  | $ | 11,076,120 |  |  | $ | 9,903,580 |
| 2023 |  | 2022 |  | 2021
Total revenues: |  |  |  |  |
United States electrical construction and facilities services | $ | 2,786,895 |  |  | $ | 2,438,916 |  |  | $ | 2,033,863 |
United States mechanical construction and facilities services | 5,134,686 |  |  | 4,338,584 |  |  | 3,935,737 |
United States building services | 3,228,056 |  |  | 2,856,115 |  |  | 2,553,566 |
United States industrial services | 1,179,321 |  |  | 1,175,469 |  |  | 1,021,217 |
Less intersegment revenues | (182,508) |  |  | (210,042) |  |  | (150,754) |
Total United States operations | 12,146,450 |  |  | 10,599,042 |  |  | 9,393,629 |
United Kingdom building services | 436,423 |  |  | 477,078 |  |  | 509,951 |
Total operations | $ | 12,582,873 |  |  | $ | 11,076,120 |  |  | $ | 9,903,580 |
| 2023 |  | 2022 |  | 2021
Operating income (loss): |  |  |  |  |
United States electrical construction and facilities services | $ | 230,640 |  |  | $ | 148,728 |  |  | $ | 169,355 |
United States mechanical construction and facilities services | 530,644 |  |  | 330,325 |  |  | 312,809 |
United States building services | 182,995 |  |  | 146,639 |  |  | 124,335 |
United States industrial services | 35,375 |  |  | 19,787 |  |  | (1,666) |
Total United States operations | 979,654 |  |  | 645,479 |  |  | 604,833 |
United Kingdom building services | 25,681 |  |  | 29,838 |  |  | 27,998 |
Corporate administration | (127,229) |  |  | (110,440) |  |  | (102,031) |
Impairment loss on long-lived assets | (2,350) |  |  | — |  |  | — |
Total operations | 875,756 |  |  | 564,877 |  |  | 530,800 |
Other items: |  |  |  |  |
Net periodic pension (cost) income | (1,119) |  |  | 4,311 |  |  | 3,625 |
Interest expense | (17,199) |  |  | (13,199) |  |  | (6,071) |
Interest income | 15,415 |  |  | 2,761 |  |  | 949 |
Income before income taxes | $ | 872,853 |  |  | $ | 558,750 |  |  | $ | 529,303 |
NOTE 18 - SEGMENT INFORMATION (Continued)
| 2023 |  | 2022 |  | 2021
Capital expenditures: |  |  |  |  |
United States electrical construction and facilities services | $ | 6,929 |  |  | $ | 11,228 |  |  | $ | 4,985 |
United States mechanical construction and facilities services | 37,543 |  |  | 11,930 |  |  | 10,108 |
United States building services | 19,843 |  |  | 13,303 |  |  | 11,539 |
United States industrial services | 10,433 |  |  | 9,905 |  |  | 6,159 |
Total United States operations | 74,748 |  |  | 46,366 |  |  | 32,791 |
United Kingdom building services | 1,984 |  |  | 2,816 |  |  | 3,015 |
Corporate administration | 1,672 |  |  | 107 |  |  | 386 |
Total operations | $ | 78,404 |  |  | $ | 49,289 |  |  | $ | 36,192 |
| 2023 |  | 2022 |  | 2021
Depreciation and amortization of property, plant, and equipment: |  |  |  |  |
United States electrical construction and facilities services | $ | 8,402 |  |  | $ | 7,543 |  |  | $ | 7,229 |
United States mechanical construction and facilities services | 12,503 |  |  | 11,492 |  |  | 11,354 |
United States building services | 15,672 |  |  | 12,964 |  |  | 12,090 |
United States industrial services | 11,146 |  |  | 10,888 |  |  | 11,723 |
Total United States operations | 47,723 |  |  | 42,887 |  |  | 42,396 |
United Kingdom building services | 3,116 |  |  | 2,752 |  |  | 3,938 |
Corporate administration | 983 |  |  | 1,657 |  |  | 2,013 |
Total operations | $ | 51,822 |  |  | $ | 47,296 |  |  | $ | 48,347 |
| December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Contract assets: |  |  |  |  |
United States electrical construction and facilities services | $ | 73,464 |  |  | $ | 75,603 |  |  | $ | 48,382 |
United States mechanical construction and facilities services | 97,252 |  |  | 99,632 |  |  | 89,102 |
United States building services | 61,867 |  |  | 56,694 |  |  | 42,818 |
United States industrial services | 17,129 |  |  | 10,727 |  |  | 18,992 |
Total United States operations | 249,712 |  |  | 242,656 |  |  | 199,294 |
United Kingdom building services | 20,173 |  |  | 30,520 |  |  | 30,849 |
Total operations | $ | 269,885 |  |  | $ | 273,176 |  |  | $ | 230,143 |
| December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Contract liabilities: |  |  |  |  |
United States electrical construction and facilities services | $ | 399,550 |  |  | $ | 271,161 |  |  | $ | 200,966 |
United States mechanical construction and facilities services | 925,481 |  |  | 594,453 |  |  | 386,518 |
United States building services | 223,202 |  |  | 184,821 |  |  | 150,333 |
United States industrial services | 17,366 |  |  | 17,746 |  |  | 16,481 |
Total United States operations | 1,565,599 |  |  | 1,068,181 |  |  | 754,298 |
United Kingdom building services | 29,510 |  |  | 30,082 |  |  | 33,836 |
Total operations | $ | 1,595,109 |  |  | $ | 1,098,263 |  |  | $ | 788,134 |
NOTE 18 - SEGMENT INFORMATION (Continued)
| December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Long-lived assets: |  |  |  |  |
United States electrical construction and facilities services | $ | 290,896 |  |  | $ | 302,448 |  |  | $ | 237,766 |
United States mechanical construction and facilities services | 526,567 |  |  | 517,649 |  |  | 514,065 |
United States building services | 574,917 |  |  | 497,892 |  |  | 500,368 |
United States industrial services | 318,077 |  |  | 341,646 |  |  | 365,563 |
Total United States operations | 1,710,457 |  |  | 1,659,635 |  |  | 1,617,762 |
United Kingdom building services | 9,761 |  |  | 10,320 |  |  | 11,402 |
Corporate administration | 1,741 |  |  | 990 |  |  | 2,535 |
Total operations | $ | 1,721,959 |  |  | $ | 1,670,945 |  |  | $ | 1,631,699 |
| December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Total assets: |  |  |  |  |
United States electrical construction and facilities services | $ | 1,243,707 |  |  | $ | 1,078,405 |  |  | $ | 855,417 |
United States mechanical construction and facilities services | 2,242,833 |  |  | 1,835,001 |  |  | 1,664,822 |
United States building services | 1,382,664 |  |  | 1,206,518 |  |  | 1,097,568 |
United States industrial services | 571,658 |  |  | 552,545 |  |  | 589,017 |
Total United States operations | 5,440,862 |  |  | 4,672,469 |  |  | 4,206,824 |
United Kingdom building services | 277,066 |  |  | 255,547 |  |  | 241,740 |
Corporate administration | 891,793 |  |  | 596,591 |  |  | 992,882 |
Total operations | $ | 6,609,721 |  |  | $ | 5,524,607 |  |  | $ | 5,441,446 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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