XML 87 R68.htm IDEA: XBRL DOCUMENT
v3.25.2

Debt - Narrative (Details) shares in Thousands |  |  |  |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 19, 2025 USD ($) | Dec. 06, 2024 USD ($) day | Aug. 02, 2023 | Jan. 20, 2023 USD ($) | Aug. 01, 2022 USD ($) | Oct. 31, 2018 USD ($) | Jun. 30, 2025 USD ($) shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2024 USD ($) | Aug. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Upfront fees (in percent) |  | 1.00% |  |  |  |  |  |  |  |
Prepayment penalty after first anniversary of closing date but prior to second anniversary of closing date (in percent) |  |  |  |  | 1.00% |  |  |  |  |
Prepayment penalty after second anniversary of closing date but prior to third anniversary of closing date (in percent) |  |  |  |  | 0.00% |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  | 0.50% |  |  |
Long-term debt, net |  |  |  |  |  |  | $ 648,455,000 |  | $ 490,520,000 |
Debt |  |  |  |  |  |  | Debt Terms of Convertible Senior Notes The Company issued $117.1 million aggregate principal amount of its 3.50% Convertible Senior Notes due 2024 in August 2020 (the “2024 Notes”) in privately negotiated exchange and/or subscription agreements, $172.5 million aggregate principal amount of its 1.50% Convertible Senior Notes due 2025 in October 2018 (the “2025 Notes”) in private placements to qualified institutional buyers within the meaning of Rule 144A under the Securities Act and $402.5 million aggregate principal amount of its 3.50% Convertible Senior Notes due 2029 in December 2023 (the “2029 Notes,” and together with the 2024 Notes and 2025 Notes, the “Convertible Senior Notes”), in private placements to qualified institutional buyers within the meaning of Rule 144A under the Securities Act. All 2025 Notes and 2029 Notes will mature on the date in the table below, unless earlier repurchased, redeemed or converted in accordance with their respective terms prior to such date. The Company redeemed all outstanding 2024 Notes on October 13, 2023. The Convertible Senior Notes are recorded on our accompanying consolidated balance sheets at their net carrying values. All of our Convertible Senior Notes also have embedded conversion options and contingent interest provisions, which have not been recorded as separate financial instruments and their fair values are Level 2 inputs. Refer to Note 17 for additional discussion on the fair value classifications of our Convertible Senior Notes. The 2025 Notes and 2029 Notes are convertible into cash, shares of the Company’s Class A common stock, or a combination of cash and shares of the Company’s Class A common stock, at the Company’s election, based on an initial conversion rate of Class A common stock per $1,000 principal amount of the 2025 Notes and 2029 Notes, which is equivalent to an initial conversion price of the Company’s Class A common stock. In the aggregate, the 2025 Notes and 2029 Notes are initially convertible into 20.3 million shares of the Company’s Class A common stock. The conversion rate may be adjusted under certain circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash or shares of the Company’s Class A common stock, or a combination of cash and shares of the Company’s Class A common stock, at the Company’s election. The following table summarizes the terms of our Convertible Senior Notes as of June 30, 2025 (in thousands, except per share conversion rates and prices):
|  |  | 2025 Notes |  | 2029 Notes
Aggregate principal amount at issuance |  |  | $ | 172,500 |  |  | $ | 402,500 |
Interest rate per annum |  |  | 1.5 | % |  | 3.5 | %
Debt issuance costs |  |  | $ | 5,929 |  |  | $ | 11,598 |
Net proceeds |  |  | $ | 166,571 |  |  | $ | 390,902 |
Issuance date |  |  | October 22, 2018 |  | December 8, 2023
Maturity date |  |  | October 15, 2025 |  | December 1, 2029
Interest payment dates (1) |  |  | April 15 and October 15 |  | June 1 and December 1
Conversion rate per $1,000 of principal |  |  | 29.9135 |  |  | 26.3125 |
Conversion price |  |  | $ | 33.43 |  |  | $ | 38.00 |
Shares issuable upon conversion(2) |  |  | 5,160 |  |  | 10,592 |
Carrying value |  |  | $ | 172,119 |  |  | $ | 393,880 |
Unamortized debt discount and issuance costs |  |  | 381 |  |  | 8,620 |
Outstanding principal |  |  | $ | 172,500 |  |  | $ | 402,500 |
Remaining amortization period (years) |  |  | 0.3 |  | 4.4
Fair value (3) |  |  | $ | 170,275 |  |  | $ | 342,137 |
———————— (1)Holders of the Convertible Senior Notes are entitled to cash payments, which are payable semiannually in arrears on the dates indicated above. (2)Measured in shares of the Company’s Class A common stock and represents the number of shares of the Company’s Class A common stock that the Convertible Senior Notes are convertible into as of June 30, 2025. Upon conversion, the Company will pay or deliver, as the case may be, cash or shares of the Company’s Class A common stock, or a combination of cash and shares of the Company’s Class A common stock, at the Company’s election. (3)Fair values for notes are derived from available trading prices closest to the respective balance sheet date. Holders of the 2025 Notes and 2029 Notes may require the Company to repurchase all or part of their notes upon the occurrence of a fundamental change at a price equal to 100.0% of the principal amount of the notes being repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The Company may redeem for cash all or any portion of the 2025 Notes, at its option if the last reported sale price of the Company’s Class A common stock has been at least 130.0% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption, at a redemption price equal to 100.0% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to the close of business on the business day immediately preceding April 15, 2025, the 2025 Notes will be convertible at the option of the holders only upon the satisfaction of certain conditions. At any time on or after April 15, 2025, until the close of business on the business day immediately preceding the maturity date, holders of the 2025 Notes may convert, at their option, all or any portion of their 2025 Notes at the conversion rate. As of June 30, 2025, none of the 2025 Notes had been converted. The Company may not redeem the 2029 Notes prior to December 6, 2026. The Company may redeem for cash all or any portion of the 2029 Notes, at its option, on or after December 6, 2026, if the last reported sale price of the Company’s Class A common stock has been at least 130.0% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption, at a redemption price equal to 100.0% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to the close of business on the business day immediately preceding September 1, 2029, the 2029 Notes will be convertible at the option of the holders only upon the satisfaction of certain conditions. At any time on or after September 1, 2029, until the close of business on the business day immediately preceding the maturity date, holders of the 2029 Notes may convert, at their option, all or any portion of their 2029 Notes at the conversion rate. 2024 Notes Exchange and Redemption On August 2, 2023, the Company issued a notice of redemption to the holders of its outstanding 2024 Notes, pursuant to which it redeemed the outstanding 2024 Notes for cash at a price of 100% of the principal amount of the 2024 Notes, plus accrued and unpaid interest, if any, on October 13, 2023 (the “Redemption Date”). Prior to the Redemption Date, holders of the 2024 Notes were entitled to convert to shares of the Company’s Class A common stock at a rate of 55.6153 shares per $1,000 principal amount of 2024 Notes. During the year ended December 31, 2023, holders of the 2024 Notes converted $23.3 million in aggregate principal amount of such notes to 1.3 million shares of the Company’s Class A common stock and the Company repaid the remaining $1.0 million balance in cash, satisfying all of the Company’s remaining payment obligations under the 2024 Notes on the Redemption Date. 2022 Credit Agreement On August 1, 2022 (the “IPG Closing Date”), the Company entered into a credit agreement, by and among the Company, Evolent Health LLC, as administrative borrower (the “Borrower”), certain subsidiaries of the Company, as co-borrowers and guarantors, the lenders from time to time party thereto, and Ares Capital Corporation (“Ares”), as administrative agent, collateral agent and revolver agent (as modified by Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment No. 4 and Amendment No. 5 (each, as defined below), the “Existing Credit Agreement” and as amended through the date hereof, the “First Lien Credit Agreement”), pursuant to which the lenders agreed to extend credit to the Borrower in the form of (i) initial term loans in an aggregate principal amount of $175.0 million (the “Initial Term Loan Facility”) and (ii) asset-based revolving credit commitments in an aggregate principal amount of $50.0 million (the “Initial Revolving Facility”), the availability of which shall be determined by reference to the lesser of $50.0 million and a borrowing base calculation. The Borrowers borrowed full amount under the Initial Term Loan Facility and the Initial Revolving Facility on the IPG Closing Date. A closing fee of (a) 2.00% of the aggregate amount of the commitments in respect of the Initial Term Loan Facility and (b) 2.00% of the aggregate amount of the commitments in respect of the Initial Revolving Facility was paid as of the IPG Closing Date. On January 20, 2023 (“the NIA Closing Date”), the Company entered into Amendment No. 1 to the First Lien Credit Agreement (“Amendment No. 1”), pursuant to which the lenders agreed to extend credit to the Borrower in the form of (i) additional commitments under the Company’s existing asset-based revolving credit facility in an aggregate principal amount equal to $25.0 million (the “2023 Revolver Increase”), and (ii) additional term loans in an aggregate principal amount equal to $240.0 million, (the “2023 Additional Term Loans”). The Borrowers borrowed the full amount under the Incremental Term Loan Facility and the Incremental Revolving Facility on the NIA Closing Date to finance, together with the proceeds from the sale of the Series A Preferred Stock, the cash consideration payable in connection with the NIA acquisition on the NIA Closing Date and pay transaction fees and expenses. A closing fee of (a) 3.00% of the aggregate amount of the commitments in respect of the Incremental Term Loan Facility and (b) 3.00% of the aggregate amount of the commitments in respect of the Incremental Revolving Facility was paid as of the NIA Closing Date. On December 5, 2023, the Company entered into Amendment No. 2 (“Amendment No. 2”) to the First Lien Credit Agreement pursuant to which the lenders agreed to certain mechanical changes necessary to permit issuance by the Company of additional unsecured convertible notes. On December 6, 2024 (the “Amendment No. 3 Effective Date”), the Company entered into Amendment No. 3 (“Amendment No. 3”) to the First Lien Credit Agreement that provides new secured debt financing in the form of (i) additional commitments under the Company’s existing asset-based revolving credit facility in an aggregate principal amount equal to $50.0 million (the “2024 Revolver Increase”, and together with the Initial Revolving Facility and the 2023 Revolver Increase, the “Revolving Facility”), (ii) a new delayed draw term loan facility in an aggregate principal amount equal to $125.0 million (the “2024-A Delayed Draw Term Loan Facility”), and (iii) a new delayed draw term loan facility in an aggregate principal amount equal to $75.0 million (the “2024-B Delayed Draw Term Loan Facility” and together with the 2024 Revolver Increase and the 2024-A Delayed Draw Term Loan Facility, the “2024 Incremental Facilities”; the Initial Term Loan Facility, the 2023 Additional Term Loans, the 2024-A Delayed Draw Term Loan Facility and the 2024-B Delayed Draw Term Loan Facility are collectively referred to herein as the “Term Loan Facility”; the Revolving Facility and the Term Loan Facility are collectively referred to herein as the “Credit Facilities”), and effected certain amendments to the Existing Credit Agreement. The Borrower paid closing fees equal to 1.00% of the aggregate commitments provided in respect of the 2024 Incremental Facilities on the date the commitment letter in respect of the 2024 Incremental Facilities was executed. The Borrowers borrowed the full amount under the 2024-A Delayed Draw Term Loan Facility and the 2024-B Delayed Draw Term Loan Facility on January 29, 2025 to fund general corporate purposes, including working capital and the management of future liabilities. The Borrower paid upfront fees equal to 1.00% of the aggregate commitments of the 2024 Revolver Increase Facility on the Amendment No. 3 Effective Date and upfront fees equal to 2.00% of the of the aggregate principal amount of the loans funded under the 2024-A Delayed Draw Term Loan Facility and the 2024-B Delayed Draw Term Loan Facility on the applicable funding date. On June 13, 2025, the Company entered into Amendment No. 4 to the First Lien Credit Agreement (“Amendment No. 4”) to modify the definition of “Maturity Date.” On June 19, 2025, the Company entered into Amendment No. 5 to the First Lien Credit Agreement (“Amendment No. 5”) (which superseded Amendment No. 4) to (i) include amounts committed under a new Incremental Facility for purposes of testing “Liquidity” under the definition of “Maturity Date,” (ii) provide that failure to consummate the Exchange in certain circumstances will constitute an event of default, (iii) include certain transactions to the mandatory prepayment requirement, and (iv) provide additional flexibility to make certain restricted payments in respect of the 2025 Notes prior to maturity thereof. On June 19, 2025, in connection with the Company’s entry into Amendment No. 5, the Company and EVH LLC entered into a Commitment Letter with Ares which provides the Company additional available non-dilutive debt capital of up to $150.0 million (the “Incremental Facility”) to retire its 2025 Notes on or before October 15, 2025 (the maturity date of the 2025 Notes) and for working capital, subject to certain conditions. The Commitment Letter also required that the Company would, in the event the Incremental Facility is drawn and in certain other circumstances, exchange its existing Series A Preferred Shares for an additional second lien term facility in the amount of the Liquidation Preference of the Series A Preferred Shares ($175.0 million) (the “Exchange”). The Exchange was completed on August 7, 2025. The Company may draw on the Incremental Facility at its sole option, in an amount such that its balance of cash and cash equivalents after paying off the 2025 Notes is no more than $125.0 million. The Company has not drawn on the Incremental Facility. All loans under the First Lien Credit Agreement (including loans under the 2024 Incremental Facilities and loans outstanding under the Existing Credit Agreement) (collectively, the “Loans”) and the Second Lien Term Loans will mature on the date that is the earliest of (a) December 6, 2029, (b) the date on which all amounts outstanding under the First Lien Credit Agreement have been declared or have automatically become due and payable under the terms of the First Lien Credit Agreement, (c) the date that is ninety-one (91) days prior to the maturity date of the Company’s Convertible Senior Notes due 2029, provided this clause (C) shall not apply if a certain liquidity conditions are satisfied or if the 2025 Convertible Notes are converted to equity interests, (d) the date that is one hundred eighty (180) days prior to the maturity date of the Company’s Convertible Senior Notes due 2029 and (e) the date that is ninety-one (91) days prior to the maturity date of any other Junior Debt (as defined in the First Lien Credit Agreement) unless certain liquidity conditions are satisfied. The interest rate for all Loans will be calculated, at the option of the borrowers, (a) in the case of the Revolving Facility, at either the adjusted term Secured Overnight Funding Rate (“SOFR”) plus 4.00%, or the base rate plus 3.00% and (b) in the case of the Term Loan Facility, at either the adjusted term SOFR plus 5.50% or the base rate plus 4.50%, subject to step downs based on a total secured leverage ratio. The interest rate for the Second Lien Term Loan Facility will be calculated, (a) in the case of Second Lien Term Loans that bear interest at ABR, as the Applicable Margin plus the ABR and (b) in the case of Term SOFR Loans, the Applicable Margin plus the relevant Adjusted Term SOFR Rate, in each case subject to step downs based on a total secured leverage ratio. The interest rate for the Second Lien Term Loan will be calculated (a) in the case of loans that bear interest at ABR, 5.00% plus the ABR and (b) in the case of Term SOFR Loans, 6.00% plus the relevant Adjusted Term SOFR Rate, in each case subject to step downs based on a total secured leverage ratio. The Credit Facilities are guaranteed by the Company and the Company’s domestic subsidiaries, subject to certain customary exceptions. The Credit Facilities are secured by a first priority security interest in all of the capital stock of each borrower and guarantor (other than the Company) and substantially all of the assets of each borrower and guarantor, subject to certain customary exceptions. The Second Lien Term Loans are guaranteed on a senior secured second lien basis by the same entities that guarantee the obligations of the Borrower under the First Lien Credit Agreement on substantially the same terms (only as modified to reflect their second lien nature). The Second Lien Term Loans are secured by a second priority security interest in substantially all of the assets of each borrower and guarantor, subject to certain customary exceptions, on substantially the same terms as set forth in the First Lien Credit Agreement. Loans in respect of the Term Loan Facility outstanding under the First Lien Credit Agreement may be prepaid and commitments in respect of the Revolving Facility outstanding under the First Lien Credit Agreement may be terminated at the option of the Borrower subject to applicable premiums and a call protection premium payable on the amount prepaid or terminated, as applicable, in certain instances as follows: (1) 2.00% of the principal amount so prepaid or terminated after the Amendment No. 3 Effective Date but prior to the first anniversary of the Amendment No. 3 Effective Date; (2) 1.00% of the principal amount so prepaid or terminated after the first anniversary of the Amendment No. 3 Effective Date but prior to the second anniversary of the Amendment No. 3 Effective Date; and (3) 0.00% of the principal amount so prepaid or terminated on or after the second anniversary of the Amendment No. 3 Effective Date. The Borrowers will pay an unused line fee equal to 0.50% times the result of (i) the aggregate amount of the Revolving Facility, less (ii) the average Revolving Facility usage during the immediately preceding month (or portion thereof), which fee shall be due and payable quarterly in arrears, on the first day of each calendar quarter from and after the IPG Closing Date and on the date on which (X) the Credit Facilities are paid in full in cash and (y) the Revolving Facility is otherwise terminated in accordance with the terms of the First Lien Credit Agreement. Loans under the 2024 Incremental Facilities are subject to the same security and guarantee arrangements and affirmative and negative covenants, mandatory prepayment provisions and events of default as loans outstanding under the Existing Credit Agreement, in each case, subject to certain modifications agreed by the parties. We incurred debt issuance costs of $14.6 million in connection with the Existing Credit Agreement and $3.4 million in connection with borrowings under the 2024 Incremental Facilities, respectively, which will be amortized into interest expense over the life of the First Lien Credit Agreement. During the six months ended June 30, 2025, the Company borrowed $200.0 million under its Term Loan Facility. As of June 30, 2025, there was $200.0 million and $62.5 million outstanding under the Company’s Term Loan Facility and Revolving Facility, respectively. Interest Expense Interest expense and amortization of debt issuance costs activity were as follows (in thousands):
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024 |  |
2029 Notes |  |  |  |  |  |  |  |  |
Interest expense | $ | 3,522 |  |  | $ | 3,522 |  |  | $ | 7,044 |  |  | $ | 7,044 |  |  |
Amortization of debt issuance costs | 482 |  |  | 480 |  |  | 964 |  |  | 960 |  |  |
Interest expense for 2029 Notes | $ | 4,004 |  |  | $ | 4,002 |  |  | $ | 8,008 |  |  | $ | 8,004 |  |  |
2022 Credit Agreement |  |  |  |  |  |  |  |  |
Interest expense | $ | 6,182 |  |  | $ | 943 |  |  | $ | 11,245 |  |  | $ | 1,889 |  |  |
Amortization of debt issuance costs | 441 |  |  | 80 |  |  | 787 |  |  | 159 |  |  |
Interest expense for 2022 Credit Agreement | $ | 6,623 |  |  | $ | 1,023 |  |  | $ | 12,032 |  |  | $ | 2,048 |  |  |
2025 Notes |  |  |  |  |  |  |  |  |
Interest expense | $ | 648 |  |  | $ | 647 |  |  | $ | 1,294 |  |  | $ | 1,294 |  |  |
Amortization of debt issuance costs | 326 |  |  | 323 |  |  | 652 |  |  | 646 |  |  |
Interest expense for 2025 Notes | $ | 974 |  |  | $ | 970 |  |  | $ | 1,946 |  |  | $ | 1,940 |  |  |
Line of credit | Term loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 240,000,000 | $ 175,000,000 |  |  |  |  |
Closing fee percentage |  |  |  | 3.00% | 2.00% |  |  |  |  |
Number of days prior to any junior debt maturity | day |  | 91 |  |  |  |  |  |  |  |
Line of credit | Revolving credit facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 50,000,000 |  | $ 25,000,000 | $ 50,000,000 |  |  |  |  |
Closing fee percentage |  | 1.00% |  | 3.00% | 2.00% |  |  |  |  |
Line of credit | 2022 Credit Agreement |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalty prior to first anniversary of closing date (in percent) |  |  |  |  | 2.00% |  |  |  |  |
Term loan | Second Lien Term Loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate per annum | 5.00% |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 175,000,000.0 |  |  |  |  |  |  |  |  |
Term loan | Second Lien Term Loan | SOFR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 6.00% |  |  |  |  |  |  |  |  |
Term loan | First And Second Incremental Lien Facilities |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 150,000,000.0 |  |  |  |  |  |  |  |  |
Debt covenant, draw amount restriction, maximum cash and cash equivalents threshold | $ 125,000,000.0 |  |  |  |  |  |  |  |  |
Delayed Draw Term Loan Facility 2024 - A |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Upfront fees (in percent) |  | 2.00% |  |  |  |  |  |  |  |
Delayed Draw Term Loan Facility 2024 - A | Revolving credit facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 125,000,000 |  |  |  |  |  |  |  |
Delayed Draw Term Loan Facility 2024 - B | Revolving credit facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 75,000,000 |  |  |  |  |  |  |  |
2024 Notes | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount at issuance |  |  |  |  |  |  |  |  |  | $ 117,100,000
Interest rate per annum |  |  |  |  |  |  |  |  |  | 3.50%
Repurchase covenant, repurchase price due to fundamental change as percentage of principal amount |  |  | 100.00% |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 23,300,000 |  |
Debt conversion issued (in shares) | shares |  |  |  |  |  |  |  | 1,300 |  |
Repayments of debt |  |  |  |  |  |  |  | $ 1,000,000 |  |
2024 Notes | Senior Notes | Common Class A | Class A Common Stock |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion rate per $1,000 of principal |  |  |  |  |  | 0.0556153 |  |  |  |
2025 Notes | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount at issuance |  |  |  |  |  | $ 172,500,000 | $ 172,500,000 |  |  |
Interest rate per annum |  |  |  |  |  | 1.50% | 1.50% |  |  |
Conversion amount (in shares) | shares |  |  |  |  |  |  | 5,160 |  |  |
Conversion rate per $1,000 of principal |  |  |  |  |  |  | 0.0299135 |  |  |
Unamortized debt discount and issuance costs |  |  |  |  |  |  | $ 381,000 |  |  |
3.50% Convertible Senior Notes Due 2029 | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount at issuance |  |  |  |  |  |  |  | $ 402,500,000 |  |
Interest rate per annum |  |  |  |  |  |  |  | 3.50% |  |
Senior Convertible Notes Due 2029 And 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion amount (in shares) | shares |  |  |  |  |  |  | 20,300 |  |  |
Senior Convertible Notes | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, repurchase price due to fundamental change as percentage of principal amount |  |  |  |  |  |  | 100.00% |  |  |
Repurchase covenant, sale price as a percentage of conversion price |  |  |  |  |  |  | 130.00% |  |  |
Repurchase covenant, trading days, minimum |  |  |  |  |  |  | 20 days |  |  |
Consecutive trading days, minimum |  |  |  |  |  |  | 30 days |  |  |
Repurchase covenant, repurchase price due to change in sale price as percentage of conversion price |  |  |  |  |  |  | 100.00% |  |  |
2029 Notes | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount at issuance |  |  |  |  |  |  | $ 402,500,000 |  |  |
Interest rate per annum |  |  |  |  |  |  | 3.50% |  |  |
Conversion amount (in shares) | shares |  |  |  |  |  |  | 10,592 |  |  |
Conversion rate per $1,000 of principal |  |  |  |  |  |  | 0.0263125 |  |  |
Unamortized debt discount and issuance costs |  |  |  |  |  |  | $ 8,620,000 |  |  |
2029 Notes | Senior Notes | Term loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of days prior to any junior debt maturity | day |  | 180 |  |  |  |  |  |  |  |
2022 Credit Agreement | Revolving credit facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, remaining borrowing capacity |  |  |  |  |  |  | 62,500,000 |  |  |
2022 Credit Agreement | Term Loan Facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, remaining borrowing capacity |  |  |  |  |  |  | 200,000,000.0 |  |  |
2022 Credit Agreement | Line of credit | Term loan | SOFR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 4.00% |  |  |  |  |
2022 Credit Agreement | Line of credit | Term loan | Base Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 3.00% |  |  |  |  |
2022 Credit Agreement | Line of credit | Revolving credit facility | SOFR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 5.50% |  |  |  |  |
2022 Credit Agreement | Line of credit | Revolving credit facility | Base Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 4.50% |  |  |  |  |
2022 Credit Agreement | Line of credit | Term Loan Facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  |  |  |  |  | $ 200,000,000.0 |  |  |
2022 Credit Agreement | Term loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Unamortized debt discount and issuance costs |  |  |  |  | $ 14,600,000 |  |  |  |  |
Long-term debt, net |  |  |  |  | $ 3,400,000 |  |  |  |  |

X
- Definition Debt Covenant, Draw Amount Restriction, Maximum Cash And Cash Equivalents Threshold + References No definition available. + Details
Name: | evh_DebtCovenantDrawAmountRestrictionMaximumCashAndCashEquivalentsThreshold
Namespace Prefix: | evh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Instrument, Closing Fee, Percent + References No definition available. + Details
Name: | evh_DebtInstrumentClosingFeePercent
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Maturity, Days Prior To Any Junior Debt Maturity + References No definition available. + Details
Name: | evh_DebtInstrumentMaturityDaysPriorToAnyJuniorDebtMaturity
Namespace Prefix: | evh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Prepayment Penalty, Period One, Percent + References No definition available. + Details
Name: | evh_DebtInstrumentPrepaymentPenaltyPeriodOnePercent
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Prepayment Penalty, Period Three, Percent + References No definition available. + Details
Name: | evh_DebtInstrumentPrepaymentPenaltyPeriodThreePercent
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Prepayment Penalty, Period Two, Percent + References No definition available. + Details
Name: | evh_DebtInstrumentPrepaymentPenaltyPeriodTwoPercent
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Repurchase Covenant, Consecutive Trading Days, Minimum + References No definition available. + Details
Name: | evh_DebtInstrumentRepurchaseCovenantConsecutiveTradingDaysMinimum
Namespace Prefix: | evh_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Repurchase Covenant, Sale Price As A Percentage Of Conversion Price + References No definition available. + Details
Name: | evh_DebtInstrumentRepurchaseCovenantSalePriceAsAPercentageOfConversionPrice
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Repurchase Covenant, Trading Days, Minimum + References No definition available. + Details
Name: | evh_DebtInstrumentRepurchaseCovenantTradingDaysMinimum
Namespace Prefix: | evh_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Repurchase Price Due To Change In Sale Price As Percentage Of Conversion Price + References No definition available. + Details
Name: | evh_DebtInstrumentRepurchasePriceDueToChangeInSalePriceAsPercentageOfConversionPrice
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Repurchase Price Due To Fundamental Change As Percentage Of Principal Amount + References No definition available. + Details
Name: | evh_DebtInstrumentRepurchasePriceDueToFundamentalChangeAsPercentageOfPrincipalAmount
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument Upfront Fees, Percent + References No definition available. + Details
Name: | evh_DebtInstrumentUpfrontFeesPercent
Namespace Prefix: | evh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
Name: | us-gaap_DebtConversionOriginalDebtAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/470/tableOfContent Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I + Details
Name: | us-gaap_DebtDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 + Details
Name: | us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 30: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 31: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-1A + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=evh_A2022CreditFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=evh_SecondLienTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=evh_FirstAndSecondIncrementalLienFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=evh_DelayedDrawTermLoanFacility2024AMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=evh_DelayedDrawTermLoanFacility2024BMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_SeniorConvertibleNotesDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_SeniorConvertibleNotesDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_A3.50ConvertibleSeniorNotesDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_SeniorConvertibleNotesDue2029And2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_SeniorConvertibleNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_SeniorConvertibleNotesDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evh_A2022CreditFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=evh_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |