Business combinations - Schedule of the Valuation of the Intangible Assets Acquired (Details) - VES Group, Inc. $ in Thousands  | 
 May 28, 2021  
USD ($) 
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| Finite-Lived Intangible Assets [Line Items] | |
| Estimated Fair Value | $ 664,000 | 
| Customer contracts and relationships | |
| Finite-Lived Intangible Assets [Line Items] | |
| Estimated Straight-Line Useful Life | 12 years | 
| Estimated Fair Value | $ 580,000 | 
| Provider network | |
| Finite-Lived Intangible Assets [Line Items] | |
| Estimated Straight-Line Useful Life | 12 years | 
| Estimated Fair Value | $ 57,000 | 
| Technology-based intangible assets | |
| Finite-Lived Intangible Assets [Line Items] | |
| Estimated Straight-Line Useful Life | 12 years | 
| Estimated Fair Value | $ 27,000 | 
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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