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Data Breach Perry Johnson And Associates, Inc. Data Breach [Member] Perry Johnson And Associates, Inc. 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reclassification out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Other non-current liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Stock compensation expense Share-Based Payment Arrangement, Noncash Expense Personnel expenses Labor and Related Expense Total lease cost Lease, Cost Leases Lessee, Operating Leases [Text Block] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Basic EPS (in dollars per share) Earnings Per Share, Basic Insurance Type and Tier Identifier [Axis] Insurance Type and Tier Identifier [Axis] Total occupational health center revenue Occupational Health Center [Member] Occupational Health Center Total current assets Assets, Current Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] Before Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Proceeds from term loans, net of issuance costs Proceeds from Issuance of Secured Debt Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Type and Tier Identifier [Domain] Type and Tier Identifier [Domain] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Variable lease cost Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Non-controlling interests Equity, Attributable to Noncontrolling Interest Other debt Notes Payable, Other Payables [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Number of onsite health clinics Number of Onsite Health Clinics Operated by Entity Number of Onsite Health Clinics Operated by Entity Total Stockholders’ Equity Parent [Member] Schedule of accrued and other liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Other operating (expense) income Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders’ equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Thereafter Long-Term Debt And Finance Lease Obligation, Maturities, Repayments Of Principal After Year Four Long-Term Debt And Finance Lease Obligation, Maturities, Repayments Of Principal After Year Four Schedule of redeemable non-controlling interests Redeemable Noncontrolling Interest [Table Text Block] General and administrative, exclusive of depreciation and amortization General and Administrative Expense Adjustment to Compensation: Adjustment to Compensation [Axis] Net deferred (losses)/gains on cash flow hedges reclassified to net income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net income attributable to redeemable non-controlling interests Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Share Repurchase Program [Axis] Share Repurchase Program [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Number of class action lawsuit pending Loss Contingency, Number of Class Action Lawsuit Pending Loss Contingency, Number of Class Action Lawsuit Pending Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Select Medical Corporation Select Medical Corporation [Member] Select Medical Corporation [Member] Long-term debt, net of current portion Long-Term Debt and Lease Obligation Increase in revolving credit facility Line of Credit Facility, Increase (Decrease), Net Name Measure Name Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Other current assets Increase (Decrease) in Other Current Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Total gains/(losses) recognized in statements of comprehensive income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Consideration transferred Consideration given Business Combination, Consideration Transferred Capital in Excess of Par Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Debt instrument, covenant, leverage ratio Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Name Trading Arrangement, Individual Name Cash Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Schedule of reconciliation of Adjusted EBITDA to income before income taxes Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Net income Net income (Losses)/gains on hedges Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Accrued vacation Accrued Vacation, Current Current assets: Assets, Current [Abstract] Total revenue Business Combination, Pro Forma Information, Pro Forma Revenue Derivative liability Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Senior notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income tax benefit/(expense) Income Tax Expense (Benefit) Forfeiture of unvested restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net increase (decrease) in cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Other identifiable intangible assets, net Other Intangible Assets, Net Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Net income attributable to the Company Net income attributable to the Company Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Issuance of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Gross Loss contingency, new claims filed, number Loss Contingency, New Claims Filed, Number Other Other Businesses [Member] Other Businesses Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract]