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Operating Segments and Related Information - Schedule of Company's Operating Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue $ 242.0 $ 313.1 $ 516.2 $ 628.3  
Cost of revenue 196.4 247.5 425.1 514.1  
Selling, general and administrative 35.1 42.9 72.9 82.4  
Depreciation and amortization 4.4 4.4 8.8 8.8  
Other operating (income) loss 1.2 (10.5) 1.1 (8.6)  
Income (loss) from operations 4.9 28.8 8.3 31.6  
Other data:          
Capital expenditures 6.1 3.1 10.8 8.7  
Investments 4.4   4.4   $ 3.6
Total assets 890.9   890.9   891.1
Infrastructure          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue 233.1 305.2 498.0 613.1  
Life Sciences          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue 3.2 1.7 6.3 2.7  
Spectrum          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue 5.7 6.2 11.9 12.5  
Operating Segments | Infrastructure          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue 233.1 305.2 498.0 613.1  
Cost of revenue 191.4 243.5 414.9 506.6  
Selling, general and administrative 26.8 33.8 56.1 64.7  
Depreciation and amortization 3.1 2.9 6.2 5.9  
Other operating (income) loss 1.2 (10.5) 1.1 (8.9)  
Income (loss) from operations 10.6 35.5 19.7 44.8  
Other data:          
Capital expenditures 5.1 2.7 9.2 7.9  
Investments 0.0   0.0   0.0
Total assets 695.7   695.7   683.6
Operating Segments | Life Sciences          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue 3.2 1.7 6.3 2.7  
Cost of revenue 2.1 1.1 4.4 1.7  
Selling, general and administrative 3.8 4.5 7.5 8.0  
Depreciation and amortization 0.1 0.1 0.2 0.2  
Other operating (income) loss 0.0 0.0 0.0 0.0  
Income (loss) from operations (2.8) (4.0) (5.8) (7.2)  
Other data:          
Capital expenditures (0.1) 0.0 0.0 0.1  
Investments 1.8   1.8   1.8
Total assets 10.7   10.7   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 5.7 6.2 11.9 12.5  
Cost of revenue 2.9 2.9 5.8 5.8  
Selling, general and administrative 1.9 1.8 3.8 3.7  
Depreciation and amortization 1.2 1.3 2.4 2.6  
Other operating (income) loss 0.0 0.1 0.0 0.1  
Income (loss) from operations (0.3) 0.1 (0.1) 0.3  
Other data:          
Capital expenditures 1.1 0.4 1.6 0.7  
Investments 0.0   0.0   0.0
Total assets 176.2   176.2   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 2.6 2.8 5.5 6.0  
Depreciation and amortization 0.0 0.1 0.0 0.1  
Other operating (income) loss 0.0 (0.1) 0.0 0.2  
Income (loss) from operations (2.6) (2.8) (5.5) (6.3)  
Other data:          
Capital expenditures 0.0 0.0 0.0 0.0  
Investments 2.6   2.6   1.8
Total assets 8.3   8.3   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 (income) loss 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