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General and Administrative Expense Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Equity interest issued (in shares) Business Combination, Consideration Transferred, Equity Interest, Shares Business Combination, Consideration Transferred, Equity Interest, Shares Stock portion of MedTech anniversary payment Stock Issued During Period, Value, Anniversary Installment Payment Stock Issued During Period, Value, Anniversary Installment Payment Number of subsidiaries Number Of Subsidiaries Number Of Subsidiaries Adjustment to Compensation: Adjustment to Compensation [Axis] LOC Acquisition LOC Acquisition [Member] LOC Acquisition Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash consideration Payments to Acquire Productive Assets Cash paid for interest Interest Paid, Excluding Capitalized Interest, 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Category SUPPLEMENTAL DISCLOSURES Supplemental Cash Flow Elements [Abstract] Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Other acquisitions, including clinics, net of cash acquired Payments to Acquire Business Two, Net of Cash Acquired Short-term investments Short-Term Investments Name Trading Arrangement, Individual Name Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Asset acquisition, contingent consideration (in shares) Asset Acquisition, Contingent Consideration, Shares Asset Acquisition, Contingent Consideration, Shares Depreciation and amortization Depreciation, Depletion and Amortization Business combination, anniversary payments present value Business Combination, Consideration Transferred, Anniversary Payments Present Value Business Combination, 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Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]