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Reserves for Claims and Performance-Based Arrangements (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 | Sep. 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 | 383,479 | 379,206
Incurred costs related to prior year | 378 | 3,815
Paid costs related to current year | 249,311 | 390,613
Paid costs related to prior year | 124,915 | 16,043
Change during the year | 9,631 | (23,635)
Impact of consolidation on reserves for claims and performance-based arrangements | 0 | 164,297
Disposal of discontinued operations | (13,194) | 0
Other adjustments | 6,755 | 6,501
Ending balance | 191,878 | 208,313
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 | 2,376
Incurred costs related to prior year | 527 | 2,319
Paid costs related to current year | 20,801 | 74,939
Paid costs related to prior year | 19,174 | 1,608
Change during the year | (30,779) | (71,852)
Impact of consolidation on reserves for claims and performance-based arrangements | 0 | 164,297
Disposal of discontinued operations | 0 | 0
Other adjustments | (2,047) | 501
Ending balance | 23,469 | 97,211
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 | 340,582 | 313,259
Incurred costs related to prior year | 92 | 8
Paid costs related to current year | 205,236 | 260,660
Paid costs related to prior year | 98,363 | 7,460
Change during the year | 37,075 | 45,147
Impact of consolidation on reserves for claims and performance-based arrangements | 0 | 0
Disposal of discontinued operations | 0 | 0
Other adjustments | 8,802 | 6,000
Ending balance | 168,409 | 101,392
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 | 63,571
Incurred costs related to prior year | (241) | 1,488
Paid costs related to current year | 23,274 | 55,014
Paid costs related to prior year | 7,378 | 6,975
Change during the year | 3,335 | 3,070
Impact of consolidation on reserves for claims and performance-based arrangements | 0 | 0
Disposal of discontinued operations | (13,194) | 0
Other adjustments | 0 | 0
Ending balance | $ 0 | $ 9,710

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- Definition Current Year Claims And Claims Adjustment Expense, Including Cost Of Goods And Services Sold, Excluding Depreciation And Amortization + References No definition available. + Details
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- Definition Liability For Unpaid Claims And Claims Adjustment Expense, Disposal Of Discontinued Operations + References No definition available. + Details
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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 -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount of increase (decrease) in the cost of settling unpaid claims after deduction of reinsurance recoveries related to the acquisition of a business. Includes, but is not limited to, claims which have been incurred but not reported. + References No definition available. + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Sum of adjustments to the estimated reserve for unpaid claims and claims adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of increase (decrease) in the liability for unpaid claims and claims adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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