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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Narrative) |  |  |  |  | 3 Months Ended | 12 Months Ended | 24 Months Ended | 40 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2022 USD ($) center | Jan. 20, 2022 USD ($) loan shares | Nov. 05, 2019 USD ($) | Feb. 01, 2018 USD ($) shares | Sep. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) incentivePlan investment jointVenture | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Oct. 31, 2025 USD ($) | Dec. 31, 2021 USD ($) | Oct. 31, 2023 USD ($) | Oct. 01, 2022 USD ($) | Apr. 15, 2021 shares | Jul. 01, 2020 USD ($) | Oct. 11, 2019 shares | Jun. 30, 2019 USD ($) agreement | Jan. 01, 2019 USD ($) | Dec. 31, 2016 USD ($) agreement
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government Assistance, Statement of Financial Position [Extensible Enumeration] |  |  |  |  |  | Deferred revenue |  |  |  |  |  |  |  |  |  |  |  |
Factoring receivable |  |  |  |  |  | $ 15,400,000 | $ 17,700,000 |  |  | $ 17,700,000 |  |  |  |  |  |  |  |
Service fee revenue |  |  |  |  |  | 1,430,061,000 | 1,315,077,000 | $ 1,071,840,000 |  |  |  |  |  |  |  |  |  |
Deferred financing costs, net of accumulated amortization |  |  |  |  |  | 2,300,000 | 2,100,000 |  |  | 2,100,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 677,665,000 | 513,820,000 | 472,879,000 |  | 513,820,000 |  |  |  |  |  |  |  |
Indefinite lived intangible assets |  |  |  |  |  | 24,100,000 | 20,600,000 |  |  | 20,600,000 |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  | 0 | $ 0 | 4,170,000 |  |  |  |  |  |  |  |  |  |
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  |  | Gain (Loss) on Termination of Lease |  |  |  |  |  |  |  |  |  |  |
Lease abandonment charges |  |  |  |  |  |  | $ 12,600,000 |  |  |  |  |  |  |  |  |  |  |
Workers' compensation liability, current |  |  |  |  |  | 3,900,000 | 3,500,000 |  |  | 3,500,000 |  |  |  |  |  |  |  |
Medical malpractice deductible per incidence |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |
Employer matching contribution, percent |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Employee contribution, percent |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |  |
Expected employee contribution |  |  |  |  |  | $ 3,000,000 |  | 0 |  |  |  |  |  |  |  |  |  |
Number of plans | incentivePlan |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 16,500,000 |  |  |  |  |
Accumulated other comprehensive income |  |  |  |  |  | $ 332,995,000 | 228,904,000 |  |  | 228,904,000 |  |  |  |  |  |  |  |
Number of investments | investment |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Number of unconsolidated joint ventures | jointVenture |  |  |  |  |  | 13 |  |  |  |  |  |  |  |  |  |  |  |
Management service fees |  |  |  |  |  | $ 22,200,000 | 19,600,000 | 11,300,000 |  |  |  |  |  |  |  |  |  |
Medic Vision |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total net assets |  |  |  |  |  | $ 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  |  |  |  | 14.21% |  |  |  |  |  |  |  |  |  |  |  |
Turner Imaging Systems |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment at cost |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares purchased (in shares) | shares |  |  |  | 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock issued upon conversion (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80,000 |  |  |
Turner Imaging Systems | Promissory note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible promissory note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |
WhiteRabbit.ai Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment at cost |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to fund loan to related parties |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Arizona Diagnostics Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment at cost | $ 12,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional contribution |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Number of assets sold | center | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Different between the sales price and carrying value | $ (500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Received a dividend from the partnership | 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Book value of RadNet joint venture interests | 8,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly amortization of deferred hedge gains |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Forecast | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly amortization of deferred hedge gains |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 24,400,000 |  |  |  |
2016 Caps | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%
September 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 150,000,000
October 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 350,000,000
2016 Caps |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forward interest rate cap agreements | agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000
Interest rate caps premium liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,300,000
2019 SWAPS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forward interest rate cap agreements | agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,000 |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |
2019 SWAPS | 2019 SWAPS - Interest Rate Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |
2019 SWAPS | 2019 SWAPS - Interest Rate Contracts | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.96% |  |
2019 SWAPS | October 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forward interest rate cap agreements | agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |  |
2019 SWAPS | October 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forward interest rate cap agreements | agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000 |  |
2019 SWAPS1 | 2019 SWAPS - Interest Rate Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |
2019 SWAPS1 | 2019 SWAPS - Interest Rate Contracts | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.05% |  |
Quantib |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 26,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  |  |  |  |  | 3,709,000 | 0 |  |  | 0 |  |  |  |  |  |  |  |
Business combination, contingent consideration, liability, period |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, additional number of shares | shares |  | 113,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, fair value of additional shares issued after execution |  | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quantib | Contingent Milestone Consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  |  |  |  |  | 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Quantib | Cash Holdback |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  | 1,600,000 |  |  |  | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Montclair |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  |  |  |  |  | 1,200,000 | 0 |  |  | 0 |  | $ 1,200,000 |  |  |  |  |  |
Heart and Lung Imaging Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 16,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued | $ 10,800,000 |  |  |  |  | 11,656,000 | 0 |  |  | 0 |  |  |  |  |  |  |  |
Business combination, contingent consideration, liability, period | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Heart and Lung Imaging Limited | Contingent Milestone Consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued | $ 10,200,000 |  |  |  |  | 11,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Heart and Lung Imaging Limited | Cash Holdback |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aidence |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | 22,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase agreements |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of identified milestones | loan |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  | $ 11,900,000 |  |  |  | 11,158,000 | 0 |  |  | 0 |  |  |  |  |  |  |  |
Percent of FDA approval and payout, milestone one |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of FDA approval and payout, milestone two |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aidence | Contingent Milestone Consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  | $ 7,400,000 |  |  |  | 7,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Aidence | Cash Holdback |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  | $ 4,500,000 |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance Policy, Type [Axis]: Health Insurance Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Self-insurance accrual |  |  |  |  |  | 7,400,000 | 6,300,000 |  |  | 6,300,000 |  |  |  |  |  |  |  |
Trade Names |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indefinite lived intangible assets |  |  |  |  |  | $ 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  | 4,200,000 |  |  |  |  |  |  |  |  |  |
Leasehold improvements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long lived asset |  |  |  |  |  |  | 7,100,000 |  |  |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, award vesting period |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, expiration period |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Restated Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, award vesting period |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, expiration period |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Blue Shield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stop loss policy claim amount |  |  |  |  |  | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Dignity Health | Glendale Advanced Imaging | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Propery and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PP&E useful life |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Leasehold improvements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PP&E useful life |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, award vesting period |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, expiration period |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Restated Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, award vesting period |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, expiration period |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Blue Shield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stop loss policy claim amount |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Dignity Health | Glendale Advanced Imaging | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest |  |  |  |  |  | 55.00% |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Propery and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PP&E useful life |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Leasehold improvements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PP&E useful life |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |
Imaging Centers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 606,483,000 | 489,210,000 | 448,269,000 |  | 489,210,000 |  |  |  |  |  |  |  |
Net service fee revenue | eRAD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service fee revenue |  |  |  |  |  | 13,200,000 | 10,500,000 | 8,600,000 |  |  |  |  |  |  |  |  |  |
Barclays |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total credit facilities outstanding |  |  |  |  |  | 0 | 0 |  |  | 0 |  |  |  |  |  |  |  |
Truist |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total credit facilities outstanding |  |  |  |  |  | 0 | 0 |  |  | 0 |  |  |  |  |  |  |  |
C O V I D19 Pandemic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advance medicare payments |  |  |  |  |  |  | 100,000 | 39,500,000 |  | 39,600,000 |  |  |  |  |  |  |  |
Proceeds from provider relief funding |  |  |  |  |  | 0 | 9,100,000 | $ 26,300,000 |  | $ 35,400,000 |  |  |  |  |  |  |  |
Repayment of advance medicare payments |  |  |  |  |  | 30,200,000 | $ 8,400,000 |  |  |  |  |  |  |  |  |  |  |
Amount in deferred revenue |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Refundable claim percentage |  |  |  |  |  | 50.00% | 50.00% | 50.00% |  | 50.00% |  |  |  |  |  |  |  |
Deferred social security taxes |  |  |  |  |  |  |  | $ 16,300,000 |  |  |  |  |  |  |  |  |  |
Reduction in deferred social security taxes |  |  |  |  | $ 7,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
C O V I D19 Pandemic | Paycheck Protection Program Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from loans |  |  |  |  |  |  |  | $ 4,000,000 |  |  |  |  |  |  |  |  |  |

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