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Segment Information | 12 Months Ended
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Dec. 31, 2023
Segment Reporting [Abstract] |
Segment Information | SEGMENT INFORMATION We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. Our services are provided to a broad range of commercial, technology, manufacturing, industrial, healthcare, utility, and institutional customers through approximately 100 operating subsidiaries. Such operating subsidiaries are organized into the following reportable segments: •United States electrical construction and facilities services; •United States mechanical construction and facilities services; •United States building services; •United States industrial services; and •United Kingdom building services. Our reportable segments and related disclosures reflect certain reclassifications of prior year amounts from our United States mechanical construction and facilities services segment to our United States building services segment due to changes in our internal reporting structure aimed at realigning our service offerings. NOTE 18 - SEGMENT INFORMATION (Continued) 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 The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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