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Operating Segments and Related Information - Schedule of Company's Operating Segments (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 274.2 $ 315.2  
Cost of revenue 228.7 266.6  
Selling, general and administrative 37.8 39.5  
Depreciation and amortization 4.4 4.4  
Other operating income (loss) (0.1) 1.9  
Income (loss) from operations 3.4 2.8  
Other data:      
Capital expenditures 4.7 5.6  
Investments 4.1   $ 3.6
Total assets 868.0   891.1
Infrastructure      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 264.9 307.9  
Life Sciences      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 3.1 1.0  
Spectrum      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 6.2 6.3  
Operating Segments | Infrastructure      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 264.9 307.9  
Cost of revenue 223.5 263.1  
Selling, general and administrative 29.3 30.9  
Depreciation and amortization 3.1 3.0  
Other operating income (loss) (0.1) 1.6  
Income (loss) from operations 9.1 9.3  
Other data:      
Capital expenditures 4.1 5.2  
Investments 0.0   0.0
Total assets 671.9   683.6
Operating Segments | Life Sciences      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 3.1 1.0  
Cost of revenue 2.3 0.6  
Selling, general and administrative 3.7 3.5  
Depreciation and amortization 0.1 0.1  
Other operating income (loss) 0.0 0.0  
Income (loss) from operations (3.0) (3.2)  
Other data:      
Capital expenditures 0.1 0.1  
Investments 1.8   1.8
Total assets 11.7   11.9
Equity method investments 0.9   0.9
Operating Segments | Spectrum      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 6.2 6.3  
Cost of revenue 2.9 2.9  
Selling, general and administrative 1.9 1.9  
Depreciation and amortization 1.2 1.3  
Other operating income (loss) 0.0 0.0  
Income (loss) from operations 0.2 0.2  
Other data:      
Capital expenditures 0.5 0.3  
Investments 0.0   0.0
Total assets 178.3   178.9
Non-Operating Corporate      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 0.0 0.0  
Cost of revenue 0.0 0.0  
Selling, general and administrative 2.9 3.2  
Depreciation and amortization 0.0 0.0  
Other operating income (loss) 0.0 0.3  
Income (loss) from operations (2.9) (3.5)  
Other data:      
Capital expenditures 0.0 0.0  
Investments 2.3   1.8
Total assets 6.1   16.7
Other and Eliminations      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue 0.0  
Cost of revenue 0.0 0.0  
Selling, general and administrative 0.0 0.0  
Depreciation and amortization 0.0 0.0  
Other operating income (loss) 0.0 0.0  
Income (loss) from operations 0.0 0.0  
Other data:      
Capital expenditures 0.0 $ 0.0  
Investments 0.0   0.0
Total assets $ 0.0   $ 0.0