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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