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Reserves for Claims and Performance-Based Arrangements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Beginning balance	$ 188,686	$ 61,150
Incurred costs related to current year	262,240	245,696
Incurred costs related to prior year	6,267	830
Paid costs related to current year	117,454	200,989
Paid costs related to prior year	99,443	17,004
Change during the year	51,610	28,533
Disposal of discontinued operations	(13,194)	0
Other adjustments	11,003	4,726
Ending balance	238,105	94,409
Evolent Health Services
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Beginning balance	56,295	4,265
Incurred costs related to current year	8,669	2,135
Incurred costs related to prior year	6,293	(498)
Paid costs related to current year	20,801	4,020
Paid costs related to prior year	20,673	2,530
Change during the year	(26,512)	(4,913)
Disposal of discontinued operations	0	0
Other adjustments	3,721	0
Ending balance	33,504	(648)
Clinical Solutions
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Beginning balance	122,532	50,245
Incurred costs related to current year	219,343	201,977
Incurred costs related to prior year	215	(23)
Paid costs related to current year	73,379	163,431
Paid costs related to prior year	71,392	7,499
Change during the year	74,787	31,024
Disposal of discontinued operations	0	0
Other adjustments	7,282	4,726
Ending balance	204,601	85,995
True Health
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Beginning balance	9,859	6,640
Incurred costs related to current year	34,228	41,584
Incurred costs related to prior year	(241)	1,351
Paid costs related to current year	23,274	33,538
Paid costs related to prior year	7,378	6,975
Change during the year	3,335	2,422
Disposal of discontinued operations	(13,194)	0
Other adjustments	0	0
Ending balance	$ 0	$ 9,062

X

- Definition

Current Year Claims And Claims Adjustment Expense, Including Cost Of Goods And Services Sold, Excluding Depreciation And Amortization

+ References

No definition available.

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- Definition

Liability For Unpaid Claims And Claims Adjustment Expense, Disposal Of Discontinued Operations

+ References

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- Definition

The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 40
-Section 50
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Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs.

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Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs.

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Sum of adjustments to the estimated reserve for unpaid claims and claims adjustment expense.

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Amount, after effects of reinsurance, of increase (decrease) in the liability for unpaid claims and claims adjustment expense.

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Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.

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