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v3.23.3

Segment Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) Company | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of operating subsidiaries | Company |  |  | 100 |  |
Revenues from unrelated entities | $ 3,207,598 | $ 2,826,361 | $ 9,143,652 | $ 8,126,298 |
Total revenues | 3,207,598 | 2,826,361 | 9,143,652 | 8,126,298 |
Total assets | 6,224,193 |  | 6,224,193 |  | $ 5,524,607
Net periodic pension (cost) income | (284) | 1,025 | (840) | 3,288 |
Interest expense, net | (90) | (3,194) | (4,614) | (6,234) |
Operating income (loss) | 234,983 | 150,094 | 586,560 | 387,695 |
Impairment loss on long-lived assets | (2,350) | 0 | (2,350) | 0 |
Income before income taxes | 234,609 | 147,925 | 581,106 | 384,749 |
UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 3,096,872 | 2,708,660 | 8,816,009 | 7,762,552 |
Total revenues | 3,096,872 | 2,708,660 | 8,816,009 | 7,762,552 |
Total assets | 5,335,493 |  | 5,335,493 |  | 4,672,469
Operating income (loss) | 258,585 | 170,707 | 662,591 | 443,213 |
United States Electrical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 697,406 | 633,383 | 2,020,319 | 1,719,525 |
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 1,329,600 | 1,108,655 | 3,602,271 | 3,158,948 |
United States Building Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 817,718 | 719,383 | 2,318,105 | 2,041,555 |
United States Industrial Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 252,148 | 247,239 | 875,314 | 842,524 |
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 110,726 | 117,701 | 327,643 | 363,746 |
Operating Segments [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 697,766 | 634,327 | 2,022,002 | 1,723,090 |
Total revenues | 697,897 | 634,957 | 2,022,557 | 1,724,400 |
Total assets | 1,173,992 |  | 1,173,992 |  | 1,078,405
Operating income (loss) | 63,127 | 35,558 | 154,365 | 90,646 |
Operating Segments [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | 1,332,747 | 1,111,900 | 3,608,595 | 3,167,091 |
Total revenues | 1,342,149 | 1,125,162 | 3,650,875 | 3,187,117 |
Total assets | 2,159,947 |  | 2,159,947 |  | 1,835,001
Operating income (loss) | 138,476 | 90,500 | 344,550 | 225,545 |
Operating Segments [Member] | United States Building Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 846,400 | 744,801 | 2,397,944 | 2,116,385 |
Total assets | 1,415,194 |  | 1,415,194 |  | 1,206,518
Operating income (loss) | 57,156 | 46,041 | 140,943 | 108,698 |
Operating Segments [Member] | United States Industrial Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 252,244 | 266,182 | 883,808 | 878,123 |
Total assets | 586,360 |  | 586,360 |  | 552,545
Operating income (loss) | (174) | (1,392) | 22,733 | 18,324 |
Operating Segments [Member] | United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 110,726 | 117,701 | 327,643 | 363,746 |
Total assets | 262,629 |  | 262,629 |  | 255,547
Operating income (loss) | 8,869 | 8,369 | 20,220 | 25,372 |
Corporate, Non-Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total assets | 626,071 |  | 626,071 |  | $ 596,591
Operating income (loss) | (30,121) | (28,982) | (93,901) | (80,890) |
Intersegment Eliminations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | (41,818) | (62,442) | (139,175) | (143,473) |
Intersegment Eliminations [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | (360) | (944) | (1,683) | (3,565) |
Intersegment Eliminations [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from unrelated entities | $ (3,147) | $ (3,245) | $ (6,324) | $ (8,143) |

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