Annual report pursuant to Section 13 and 15(d)

Business Combinations and Acquisitions - Summary of Company's Acquisition Activity (Details)

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Business Combinations and Acquisitions - Summary of Company's Acquisition Activity (Details)
€ in Millions, $ in Millions
Aug. 01, 2022
USD ($)
Dec. 01, 2021
USD ($)
Nov. 01, 2021
USD ($)
Oct. 20, 2021
USD ($)
Sep. 01, 2021
USD ($)
Dec. 18, 2020
USD ($)
Dec. 01, 2020
USD ($)
Sep. 01, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2020
EUR (€)
Oct. 31, 2019
USD ($)
Oct. 31, 2019
EUR (€)
Jul. 19, 2019
USD ($)
Jul. 19, 2019
EUR (€)
Jul. 09, 2019
USD ($)
Business Acquisition [Line Items]                              
Cash consideration paid by GSAH       $ 1,300.0                      
Critical Infrastructure "CI"                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage 100.00%                            
Cash consideration paid by GSAH $ 6.6                            
Business combination, consideration transferred $ 6.5                            
CIRS                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage   100.00%                          
Asset acquisition, acquired percentage   100.00%                          
Equity interest, value   $ 55.1                          
Safeline                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage   100.00%                          
Equity interest, value   $ 1.5                          
Business combination, consideration transferred   $ 0.5                          
CHP                              
Business Acquisition [Line Items]                              
Asset acquisition, acquired percentage     100.00%                        
Asset acquisition, assets acquired     $ 2.5                        
Dosimetry Badge                              
Business Acquisition [Line Items]                              
Asset acquisition, acquired percentage         100.00%                    
Asset acquisition, assets acquired         $ 1.8                    
Business acquisition, earn out         $ 0.8                    
Sun Nuclear                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage           100.00%                  
Business acquisition, purchase consideration           $ 258.1                  
Dosimetrics                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage             100.00%                
Business acquisition, purchase consideration             $ 3.0                
Biodex                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage               100.00%              
Business acquisition, purchase consideration               $ 26.9              
AWST                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage                 100.00% 100.00%          
Business acquisition, purchase consideration                 $ 26.9 € 24.5          
Selmic                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage                     100.00% 100.00%      
Business acquisition, purchase consideration                     $ 10.2 € 9.1      
Premium Analyse                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage                         100.00% 100.00%  
Business acquisition, purchase consideration                         $ 8.9 € 7.9  
Capintec                              
Business Acquisition [Line Items]                              
Equity interest, acquired percentage                             100.00%
Business acquisition, purchase consideration                             $ 14.5