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Significant Accounting Policies, Goodwill and Other Indefinite-Lived Intangible Assets (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
ReportingUnit
Region
Segment
Dec. 31, 2022
USD ($)
Region
ReportingUnit
Dec. 31, 2021
USD ($)
Goodwill and Other Indefinite-Lived Intangible Assets [Abstract]      
Number of business segments | Segment 2    
Number of regions | Region 6 6  
Goodwill impairment $ 15,800 $ 9,112  
Impairment of goodwill and tradenames 17,495 $ 9,112 $ 0
Impairment of long-lived assets $ 0    
Industrial Injury Prevention Services [Member]      
Goodwill and Other Indefinite-Lived Intangible Assets [Abstract]      
Number of reporting units | ReportingUnit 2 2  
Goodwill impairment $ 15,800 $ 9,100  
Impairment of tradename $ 1,700    
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment of goodwill and tradenames    
Other [Member]      
Goodwill and Other Indefinite-Lived Intangible Assets [Abstract]      
Number of reporting units | ReportingUnit 7    
Impairment of goodwill and tradenames $ 0