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v3.25.2

Segment Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 04, 2025 | Jun. 28, 2024 | Jul. 04, 2025 | Jun. 28, 2024
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 141,962 | $ 140,536 | $ 287,469 | $ 285,469
Compensation and related expenses | 97,474 | 79,466 | 173,377 | 169,793
Operating Income | 17,177 | 35,744 | 61,609 | 66,457
Capital Expenditures | 2,390 | 1,007 | 3,642 | 2,516
Depreciation and Amortization | 2,520 | 2,486 | 5,012 | 4,810
Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Compensation and related expenses | 68,654 | 68,843 | 138,350 | 138,894
Operating Income | 49,962 | 51,024 | 103,773 | 107,891
Capital Expenditures | 345 | 510 | 882 | 956
Depreciation and Amortization | 1,885 | 1,819 | 3,758 | 3,496
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Compensation and related expenses | 28,820 | 10,623 | 35,027 | 30,899
Operating Income | (32,785) | (15,280) | (42,164) | (41,434)
Capital Expenditures | 2,045 | 497 | 2,760 | 1,560
Depreciation and Amortization | 635 | 667 | 1,254 | 1,314
Engineering and Other Scientific | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 120,980 | 118,477 | 243,115 | 239,948
Compensation and related expenses | 56,914 | 56,802 | 114,162 | 114,537
Operating Income | 42,942 | 43,765 | 88,055 | 92,396
Capital Expenditures | 306 | 465 | 781 | 882
Depreciation and Amortization | 1,836 | 1,765 | 3,662 | 3,393
Environmental and Health | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 20,982 | 22,059 | 44,354 | 45,521
Compensation and related expenses | 11,740 | 12,041 | 24,188 | 24,357
Operating Income | 7,020 | 7,259 | 15,718 | 15,495
Capital Expenditures | 39 | 45 | 101 | 74
Depreciation and Amortization | $ 49 | $ 54 | $ 96 | $ 103

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