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Operating Segments and Related Information - Schedule of Company's Operating Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | $ 347.1 | $ 242.2 | $ 863.3 | $ 870.5 |
Cost of revenue | 297.4 | 194.0 | 722.5 | 708.1 |
Selling, general and administrative | 39.6 | 37.4 | 112.5 | 119.8 |
Depreciation and amortization | 4.3 | 4.4 | 13.1 | 13.2 |
Other operating loss (income) | (0.3) | 0.5 | 0.8 | (8.1) |
Income (loss) from operations | 6.1 | 5.9 | 14.4 | 37.5 |
Other data: |  |  |  |  |
Capital expenditures | 7.8 | 3.1 | 18.6 | 11.8 |
Investments | 1.8 |  | 1.8 |  | $ 3.6
Total assets | 913.2 |  | 913.2 |  | 891.1
Infrastructure |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 338.4 | 232.8 | 836.4 | 845.9 |
Life Sciences |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 3.1 | 3.0 | 9.4 | 5.7 |
Spectrum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 5.6 | 6.4 | 17.5 | 18.9 |
Operating Segments | Infrastructure |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 338.4 | 232.8 | 836.4 | 845.9 |
Cost of revenue | 292.3 | 189.1 | 707.2 | 695.7 |
Selling, general and administrative | 27.0 | 28.3 | 83.1 | 93.0 |
Depreciation and amortization | 3.0 | 3.0 | 9.2 | 8.9 |
Other operating loss (income) | 0.1 | 0.1 | 1.2 | (8.8) |
Income (loss) from operations | 16.0 | 12.3 | 35.7 | 57.1 |
Other data: |  |  |  |  |
Capital expenditures | 7.0 | 2.8 | 16.2 | 10.7 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | 724.6 |  | 724.6 |  | 683.6
Operating Segments | Life Sciences |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 3.1 | 3.0 | 9.4 | 5.7 |
Cost of revenue | 2.2 | 2.0 | 6.6 | 3.7 |
Selling, general and administrative | 3.6 | 4.2 | 11.1 | 12.2 |
Depreciation and amortization | 0.1 | 0.1 | 0.3 | 0.3 |
Other operating loss (income) | 0.0 | 0.0 | 0.0 | 0.0 |
Income (loss) from operations | (2.8) | (3.3) | (8.6) | (10.5) |
Other data: |  |  |  |  |
Capital expenditures | 0.0 | 0.0 | 0.0 | 0.1 |
Investments | 1.8 |  | 1.8 |  | 1.8
Total assets | 10.1 |  | 10.1 |  | 11.9
Equity method investments | 0.9 |  | 0.9 |  | 0.9
Operating Segments | Spectrum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 5.6 | 6.4 | 17.5 | 18.9 |
Cost of revenue | 2.9 | 2.9 | 8.7 | 8.7 |
Selling, general and administrative | 2.0 | 1.9 | 5.8 | 5.6 |
Depreciation and amortization | 1.2 | 1.3 | 3.6 | 3.9 |
Other operating loss (income) | (0.4) | 0.4 | (0.4) | 0.5 |
Income (loss) from operations | (0.1) | (0.1) | (0.2) | 0.2 |
Other data: |  |  |  |  |
Capital expenditures | 0.8 | 0.3 | 2.4 | 1.0 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | 173.5 |  | 173.5 |  | 178.9
Non-Operating Corporate |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Cost of revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Selling, general and administrative | 7.0 | 3.0 | 12.5 | 9.0 |
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.1 |
Other operating loss (income) | 0.0 | 0.0 | 0.0 | 0.2 |
Income (loss) from operations | (7.0) | (3.0) | (12.5) | (9.3) |
Other data: |  |  |  |  |
Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 |
Investments | 0.0 |  | 0.0 |  | 1.8
Total assets | 5.0 |  | 5.0 |  | 16.7
Other and Eliminations |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Cost of revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Selling, general and administrative | 0.0 | 0.0 | 0.0 | 0.0 |
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0 |
Other operating loss (income) | 0.0 | 0.0 | 0.0 | 0.0 |
Income (loss) from operations | 0.0 | 0.0 | 0.0 | 0.0 |
Other data: |  |  |  |  |
Capital expenditures | 0.0 | $ 0.0 | 0.0 | $ 0.0 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | $ 0.0 |  | $ 0.0 |  | $ 0.0

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