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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Segment Reporting [Abstract] |
Information About Industry Segments And Geographic Areas | The following tables present information about industry segments and geographic areas for the years ended December 31, 2019, 2018, and 2017 (in thousands):
| 2019 |  | 2018 |  | 2017
Revenues from unrelated entities: |  |  |  |  |
United States electrical construction and facilities services | $ | 2,216,600 |  |  | $ | 1,954,323 |  |  | $ | 1,829,567 |
United States mechanical construction and facilities services | 3,340,337 |  |  | 2,962,843 |  |  | 2,880,148 |
United States building services | 2,106,872 |  |  | 1,875,485 |  |  | 1,753,703 |
United States industrial services | 1,087,543 |  |  | 923,109 |  |  | 882,836 |
Total United States operations | 8,751,352 |  |  | 7,715,760 |  |  | 7,346,254 |
United Kingdom building services | 423,259 |  |  | 414,871 |  |  | 340,745 |
Total worldwide operations | $ | 9,174,611 |  |  | $ | 8,130,631 |  |  | $ | 7,686,999 |
Total revenues: |  |  |  |  |
United States electrical construction and facilities services | $ | 2,220,582 |  |  | $ | 1,959,978 |  |  | $ | 1,836,985 |
United States mechanical construction and facilities services | 3,370,960 |  |  | 2,998,918 |  |  | 2,911,033 |
United States building services | 2,182,390 |  |  | 1,942,663 |  |  | 1,812,763 |
United States industrial services | 1,111,264 |  |  | 930,724 |  |  | 885,198 |
Less intersegment revenues | (133,844 | ) |  | (116,523 | ) |  | (99,725 | )
Total United States operations | 8,751,352 |  |  | 7,715,760 |  |  | 7,346,254 |
United Kingdom building services | 423,259 |  |  | 414,871 |  |  | 340,745 |
Total worldwide operations | $ | 9,174,611 |  |  | $ | 8,130,631 |  |  | $ | 7,686,999 |
| 2019 |  | 2018 |  | 2017
Operating income (loss): |  |  |  |  |
United States electrical construction and facilities services | $ | 161,684 |  |  | $ | 139,430 |  |  | $ | 150,001 |
United States mechanical construction and facilities services | 225,040 |  |  | 219,853 |  |  | 192,167 |
United States building services | 114,754 |  |  | 93,827 |  |  | 81,720 |
United States industrial services | 44,340 |  |  | 27,671 |  |  | 39,313 |
Total United States operations | 545,818 |  |  | 480,781 |  |  | 463,201 |
United Kingdom building services | 18,323 |  |  | 15,930 |  |  | 12,905 |
Corporate administration | (101,726 | ) |  | (90,415 | ) |  | (87,808 | )
Restructuring expenses | (1,523 | ) |  | (2,306 | ) |  | (1,577 | )
Impairment loss on goodwill and identifiable intangible assets | — |  |  | (907 | ) |  | (57,819 | )
Total worldwide operations | 460,892 |  |  | 403,083 |  |  | 328,902 |
Other corporate items: |  |  |  |  |
Net periodic pension (cost) income | 1,553 |  |  | 2,743 |  |  | 1,652 |
Interest expense | (13,821 | ) |  | (13,544 | ) |  | (12,770 | )
Interest income | 2,265 |  |  | 2,746 |  |  | 965 |
Income from continuing operations before income taxes | $ | 450,889 |  |  | $ | 395,028 |  |  | $ | 318,749 |
Capital expenditures: |  |  |  |  |  |  |  |
United States electrical construction and facilities services | $ | 5,876 |  |  | $ | 5,993 |  |  | $ | 4,797 |
United States mechanical construction and facilities services | 7,890 |  |  | 7,504 |  |  | 6,665 |
United States building services | 14,291 |  |  | 10,414 |  |  | 10,745 |
United States industrial services | 15,802 |  |  | 18,386 |  |  | 9,696 |
Total United States operations | 43,859 |  |  | 42,297 |  |  | 31,903 |
United Kingdom building services | 3,598 |  |  | 870 |  |  | 2,166 |
Corporate administration | 975 |  |  | 312 |  |  | 615 |
Total worldwide operations | $ | 48,432 |  |  | $ | 43,479 |  |  | $ | 34,684 |
Depreciation and amortization of property, plant and equipment: |  |  |  |  |
United States electrical construction and facilities services | $ | 7,550 |  |  | $ | 6,221 |  |  | $ | 6,545 |
United States mechanical construction and facilities services | 8,764 |  |  | 7,803 |  |  | 7,504 |
United States building services | 12,728 |  |  | 10,324 |  |  | 11,051 |
United States industrial services | 11,154 |  |  | 9,943 |  |  | 10,589 |
Total United States operations | 40,196 |  |  | 34,291 |  |  | 35,689 |
United Kingdom building services | 2,942 |  |  | 3,447 |  |  | 3,371 |
Corporate administration | 807 |  |  | 734 |  |  | 855 |
Total worldwide operations | $ | 43,945 |  |  | $ | 38,472 |  |  | $ | 39,915 |
| 2019 |  | 2018 |  | 2017
Contract assets: |  |  |  |  |  |  |
United States electrical construction and facilities services | $ | 50,813 |  |  | $ | 38,412 |  |  | $ | 35,060 |
United States mechanical construction and facilities services | 61,225 |  |  | 49,302 |  |  | 50,302 |
United States building services | 30,428 |  |  | 33,304 |  |  | 26,028 |
United States industrial services | 9,820 |  |  | 14,117 |  |  | 3,715 |
Total United States operations | 152,286 |  |  | 135,135 |  |  | 115,105 |
United Kingdom building services | 25,544 |  |  | 23,108 |  |  | 7,516 |
Total worldwide operations | $ | 177,830 |  |  | $ | 158,243 |  |  | $ | 122,621 |
Contract liabilities: |  |  |  |  |  |  |
United States electrical construction and facilities services | $ | 173,967 |  |  | $ | 163,951 |  |  | $ | 178,454 |
United States mechanical construction and facilities services | 317,083 |  |  | 280,846 |  |  | 288,699 |
United States building services | 97,588 |  |  | 79,281 |  |  | 48,481 |
United States industrial services | 12,404 |  |  | 12,307 |  |  | 4,615 |
Total United States operations | 601,042 |  |  | 536,385 |  |  | 520,249 |
United Kingdom building services | 22,600 |  |  | 15,905 |  |  | 3,907 |
Total worldwide operations | $ | 623,642 |  |  | $ | 552,290 |  |  | $ | 524,156 |
Long-lived assets: |  |  |  |  |
United States electrical construction and facilities services | $ | 215,780 |  |  | $ | 201,333 |  |  | $ | 180,990 |
United States mechanical construction and facilities services | 530,561 |  |  | 334,628 |  |  | 340,030 |
United States building services | 458,915 |  |  | 436,887 |  |  | 409,718 |
United States industrial services | 615,233 |  |  | 630,340 |  |  | 643,124 |
Total United States operations | 1,820,489 |  |  | 1,603,188 |  |  | 1,573,862 |
United Kingdom building services | 9,622 |  |  | 9,264 |  |  | 11,729 |
Corporate administration | 1,431 |  |  | 1,072 |  |  | 1,494 |
Total worldwide operations | $ | 1,831,542 |  |  | $ | 1,613,524 |  |  | $ | 1,587,085 |
Total assets: |  |  |  |  |
United States electrical construction and facilities services | $ | 834,802 |  |  | $ | 702,112 |  |  | $ | 617,471 |
United States mechanical construction and facilities services | 1,536,325 |  |  | 1,081,005 |  |  | 1,071,164 |
United States building services | 996,664 |  |  | 846,221 |  |  | 764,085 |
United States industrial services | 829,793 |  |  | 864,446 |  |  | 798,975 |
Total United States operations | 4,197,584 |  |  | 3,493,784 |  |  | 3,251,695 |
United Kingdom building services | 181,147 |  |  | 146,379 |  |  | 131,806 |
Corporate administration | 451,627 |  |  | 448,644 |  |  | 582,403 |
Total worldwide operations | $ | 4,830,358 |  |  | $ | 4,088,807 |  |  | $ | 3,965,904 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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