| Significant Accounting Policies - Shared Risk Revenue (Details) - Shared risk revenue | 12 Months Ended | 
|---|---|
| Dec. 31, 2022  agreement  subsidiary | |
| Significant Accounting Policies | |
| Number of subsidiaries receiving significant shared risk savings | subsidiary | 1 | 
| Percentage of shared risk savings received | 30.00% | 
| Number of separate arrangements | agreement | 4 | 
| Percentage of total cost savings to be received, if the sequential YoY PMPY aggregate change yields a reduction | 30.00% | 
| X | ||||||||||
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- Definition Represents the number of separate arrangements. No definition available. 
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| X | ||||||||||
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- Definition The number of subsidiaries receiving significant shared risk savings. No definition available. 
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| X | ||||||||||
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- Definition Represents the percentage of shared risk savings received. No definition available. 
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| X | ||||||||||
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- Definition Represents the percentage of total cost savings to be received, if the sequential YoY PMPY aggregate change yields a reduction. No definition available. 
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| X | ||||||||||
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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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| X | ||||||||||
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- Details 
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