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Operating Segments and Related Information - Operating Segments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 1,637.3 $ 1,205.2
Total Infrastructure segment revenue 1,637.3 1,205.2
Income (loss) from operations 13.4 (10.6)
Interest expense (52.0) (59.1)
Loss on extinguishment of debt 0.0 (12.5)
Loss from equity investees (1.3) (2.8)
Other (expense) income, net (1.2) 4.3
Loss from continuing operations before income taxes (41.1) (80.7)
Depreciation and Amortization 27.2 25.4
Total depreciation and amortization 42.2 37.6
Capital Expenditures 20.7 24.1
Infrastructure    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 1,593.8 1,159.5
Total Infrastructure segment revenue 1,594.3 1,159.7
Life Sciences    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 4.3 3.5
Spectrum    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 38.7 42.0
Operating Segments    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Depreciation and Amortization 36.0 31.3
Infrastructure recognized within cost of revenue 15.0 12.2
Operating Segments | Infrastructure    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 1,594.3 1,159.7
Income (loss) from operations 57.5 35.2
Depreciation and Amortization 21.0 19.1
Capital Expenditures 16.5 18.3
Operating Segments | Life Sciences    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 4.3 3.5
Income (loss) from operations (20.1) (19.9)
Depreciation and Amortization 0.3 0.2
Capital Expenditures 0.8 0.5
Operating Segments | Spectrum    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 38.7 42.0
Income (loss) from operations (3.8) (0.8)
Depreciation and Amortization 5.8 6.0
Capital Expenditures 3.3 5.3
Operating Segments | Other    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Income (loss) from operations (0.6) (2.0)
Non-operating Corporate    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Income (loss) from operations (19.6) (23.1)
Depreciation and Amortization 0.1 0.1
Capital Expenditures $ 0.1 $ 0.0