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Discontinued operations - Narrative (Details)
$ in Thousands
3 Months Ended
Oct. 31, 2024
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Minimum      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Transition services period   18 months  
Maximum      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Transition services period   2 years  
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Everus      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Stock split, conversion ratio 0.25    
Separation related costs   $ 502 $ 3,700
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Everus | Cash Received, TSA      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued operation, amount of continuing cash flows after disposal   1,800  
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Everus | Cash Paid, TSA      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued operation, amount of continuing cash flows after disposal   $ 13