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v3.25.0.1

Segment Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Jan. 03, 2025 | Dec. 29, 2023 | Dec. 30, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 558,514,000 | $ 536,766,000 | $ 513,293,000
Compensation and related expenses | 330,011,000 | 319,886,000 | 264,235,000
Operating Income | 119,557,000 | 111,322,000 | 140,842,000
Capital Expenditures | 7,377,000 | 18,695,000 | 12,647,000
Depreciation and Amortization | 9,689,000 | 8,916,000 | 7,079,000
Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Compensation and related expenses | 270,995,000 | 264,269,000 | 242,531,000
Operating Income | 194,878,000 | 182,350,000 | 180,019,000
Capital Expenditures | 3,334,000 | 4,065,000 | 4,835,000
Depreciation and Amortization | 7,039,000 | 6,300,000 | 4,660,000
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Compensation and related expenses | 59,016,000 | 55,617,000 | 21,704,000
Operating Income | (75,321,000) | (71,028,000) | (39,177,000)
Capital Expenditures | 4,043,000 | 14,630,000 | 7,812,000
Depreciation and Amortization | 2,650,000 | 2,616,000 | 2,419,000
Engineering and Other Scientific | Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 469,544,000 | 446,888,000 | 427,796,000
Compensation and related expenses | 223,395,000 | 215,650,000 | 195,243,000
Operating Income | 164,883,000 | 153,918,000 | 152,679,000
Capital Expenditures | 3,257,000 | 3,895,000 | 4,661,000
Depreciation and Amortization | 6,833,000 | 6,087,000 | 4,489,000
Environmental and Health | Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 88,970,000 | 89,878,000 | 85,497,000
Compensation and related expenses | 47,600,000 | 48,619,000 | 47,288,000
Operating Income | 29,995,000 | 28,432,000 | 27,340,000
Capital Expenditures | 77,000 | 170,000 | 174,000
Depreciation and Amortization | $ 206,000 | $ 213,000 | $ 171,000

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