Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Almost Family Almost Family [Member] Almost Family [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Prior Credit Facility [Axis] Prior Credit Facility [Axis] Prior Credit Facility [Axis] PriorCreditFacility [Domain] PriorCreditFacility [Domain] [Domain] for PriorCreditFacility [Axis] LHC Group LHC Group [Member] LHC Group [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Federal Funds Rate Federal Funds Effective Swap Rate [Member] Eurodollar Eurodollar [Member] Base rate Base Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Available credit under agreement Line of Credit Facility, Remaining Borrowing Capacity Credit facility maximum borrowing capacity under accordion feature Line Of Credit Facility Maximum Borrowing Capacity Under Accordion Feature Line Of Credit Facility Maximum Borrowing Capacity Under Accordion Feature Letter of credit, sub-limit amount Letters Of Credit Sublimit Letters Of Credit Sublimit Debt issuance costs Debt Related Commitment Fees and Debt Issuance Costs Line of credit facility interest rate Debt Instrument, Basis Spread on Variable Rate Line of credit facility, borrowing outstanding Number Of Outstanding Debt Instrument Maximum number of SwingLine loans the Company can have outstanding at the same time. Commitment fee rates for unused commitments Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Interest rate percentage Debt Instrument, Interest Rate, Effective Percentage Line of credit facility drawn Long-term Line of Credit, Noncurrent Credit facility, borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Letter of credit outstanding Letters of Credit Outstanding, Amount Debt Debt Disclosure [Text Block] Accounting Policies [Abstract] Reclassification Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Critical Accounting Policies Critical Accounting Policies Policy [Policy Text Block] Disclosure of critical accounting policies. Principles of Consolidation Consolidation, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Medicare Medicare [Member] Medicare [Member] Medicaid Medicaid [Member] Medicaid [Member] Managed Care, Commercial, and Other Managed Care, Commercial, and Other [Member] Managed Care, Commercial, and Other [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Home health services Home health services [Member] Home health services [Member] Hospice services Hospice Entity [Member] Hospice entity. Home and community-based services Home And Community-Based Services [Member] Home And Community-Based Services [Member] Facility-based services Facility Based Services [Member] Facility Based Services [Member] HCI Healthcare Innovations [Member] Healthcare Innovations [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Percentage of net service revenue Revenue From Contract With Customer, Percentage Revenue From Contract With Customer, Percentage Operating Cash Flows, Direct Method [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) (Loss) gain on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment Impairment of intangibles and other Goodwill and Intangible Asset Impairment Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Accounts Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid income taxes Increase (Decrease) in Prepaid Taxes Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Income taxes payable Increase (Decrease) in Accrued Taxes Payable Net amounts due to/from governmental entities Increase Decrease In Net Amounts Due To From Governmental Entities Increase (decrease) in net amounts due to/from governmental entities based on activity from annual reports. Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property, building and equipment Payments to Acquire Property, Plant, and Equipment Cash acquired from business combination, net of cash paid Cash Acquired from Acquisition Cash acquired from business combination, net of cash paid Payments to Acquire Businesses, Net of Cash Acquired Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from line of credit Proceeds from Lines of Credit Payments on line of credit Repayments of Lines of Credit Proceeds from employee stock purchase plan Proceeds from Stock Plans Payments on debt Proceeds from (Repayments of) Notes Payable Payments on deferred financing fees Payments of Financing Costs Noncontrolling interest distributions Payments of Ordinary Dividends, Noncontrolling Interest Withholding taxes paid on stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Purchase of additional controlling interest Payments to Noncontrolling Interests Sale of noncontrolling interest Proceeds from Noncontrolling Interests Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Change in cash Cash and Cash Equivalents, Period Increase (Decrease) Cash at beginning of period Cash Cash at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes paid Income Taxes Paid, Net Statement of Stockholders' Equity [Abstract] Net income attributable to noncontrolling interest-redeemable Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Equity [Abstract] Stockholder's Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Net service revenue Revenue from Contract with Customer, Excluding Assessed Tax Cost of service revenue Cost of Goods and Services Sold General and administrative expenses General and Administrative Expense Operating income Operating Income (Loss) Interest expense Interest Expense Income before income taxes and noncontrolling interest Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Less net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to LHC Group, Inc.’s common stockholders Net Income (Loss) Available to Common Stockholders, Basic Total assets Assets Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Business Combinations [Abstract] Summary of the Consideration Transferred in Connection with the Merger Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Wholly-owned subsidiaries Subsidiaries [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Equity joint ventures Equity Joint Ventures [Member] Equity Joint Ventures [Member] Other Management Services [Member] Management Services [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Incentive Plan Type [Axis] Incentive Plan Type [Axis] Incentive Plan Type [Axis] Incentive Plan Type [Domain] Incentive Plan Type [Domain] [Domain] for Incentive Plan Type [Axis] 2018 Long-Term Incentive Plan 2018 Long-Term Incentive Plan [Member] 2018 Long-Term Incentive Plan [Member] 2010 Long-Term Incentive Plan 2010 Long-Term Incentive Plan [Member] [Member] 2010 Long-Term Incentive Plan [Member] [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director Director [Member] Employee Employee [Member] Employee [Member] AFAM Options AFAM Options [Member] AFAM Options [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Common stock reserved and available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Nonvested stock grants to Independent directors (in shares) Nonvested Stock Grants To Independent Directors Number of shares issued during the period to independent directors. Percentage of directors' stock grant vested on one year anniversary date Percentage Of Directors Stock Grant Vested On One Year Anniversary Date Percentage of directors stock grant vested on one year anniversary date. Period of vested shares Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Nonvested stock grants to employees (in shares) Nonvested Stock Grants To Employees Number of shares issued during the period to employees related to Restricted stock awards. Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Total unrecognized compensation cost related to nonvested shares of common stock granted Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period of cost recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Compensation expense related to nonvested stock grants Employee Benefits and Share-based Compensation Price of shares issued under Employee Stock Purchase Plan as a percentage of FMV Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Number of shares reserved for the Employee Stock Purchase Plan (in shares) Number Of Shares Reserved For Employee Stock Purchase Plan Number of shares reserved for the Employee Stock Purchase Plan. Additional shares authorized for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Shares redeemed to satisfy personal tax obligations (in shares) Shares Paid for Tax Withholding for Share Based Compensation Treasury shares redeemed to pay income tax Adjustments Related to Tax Withholding for Share-based Compensation Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of service providers operated Number Of Service Locations Number Of Service Locations Number of states in which Company operates Number of States in which Entity Operates Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Business Acquisition [Line Items] Net service revenue Business Acquisition, Pro Forma Revenue Net income attributable to the Company Business Acquisition, Pro Forma Net Income (Loss) Diluted earnings per share (in usd per share) Diluted Earnings Per Share Pro Forma Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] ACO Accountable Care Organizations [Member] Accountable Care Organizations [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Adjustment for ASU 2014-09 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Percentage equity ownership, license leasing arrangements Percentage Equity Ownership, License Leasing Arrangements Percentage ownership in the equity of subsidiaries through license leasing arrangements at the balance sheet date. Net service revenue Number of Medicare home health resource groups Number Of Medicare Home Health Resource Groups Number of Medicare home health resource groups. Number of days from date RAP paid to submit final Medicare bill Delivering Period For Prospective Medicare Payment Number of days delivering for prospective Medicare payment. Medicare sequestration reduction for episodes beginning after March 31, 2013 Sequestration Adjustment Automatic Medicare reimbursement reduction for episodes beginning after March 31, 2013. Low utilization adjustment visits Minimum Number Of Visits For Low Utilization Adjustment Number of visits at which low utilization adjustment is no longer applicable. Selected hospice, periodic rate used to calculate revenue Selected Hospice, Periodic Rate Used to Calculate Revenue Selected Hospice, Periodic Rate Used to Calculate Revenue Number of hospice, periodic rates used to calculate revenue Number of Hospice, Periodic Rates Used to Calculate Revenue Number of Hospice, Periodic Rates Used to Calculate Revenue Minimum percentage of Medicare reimbursement from inpatient care services that subjects individual programs to inpatient cap Percentage Subject To Inpatient Cap Minimum percentage of Medicare reimbursement from inpatient care services that subjects individual programs to inpatient cap. Determination period for hospice Medicare inpatient reimbursement cap Determination Period For Hospice Medicare Inpatient Reimbursement Cap Determination period ending October 31 of each year for hospice Medicare inpatient reimbursement cap. Net service revenue related to the 2017 ACO service periods Contract with Customer, Liability, Revenue Recognized Medicare credit risk for accounts receivable Medicare Credit Risk For Accounts Receivable Percentage of patient accounts receivable attributable to Medicare at balance sheet date. Reimbursement for initial episode of care Reimbursement For Initial Episode Of Care Percentage of estimated reimbursement submitted on RAP for initial episode at start of care. Number of days from start of episode to submit final Medicare bill Period From Start Of Episode To Submit Final Medicare Bill Number of days from start of episode to submit final Medicare bill. Reimbursement for subsequent episodes of care Reimbursement For Subsequent Episodes Of Care Percentage of estimated reimbursement submitted on RAP for subsequent episodes of care contiguous with the first episode for a particular patient. Common stock, shares authorized Common Stock, Shares Authorized Almost Family Merger Mergers, Acquisitions and Dispositions Disclosures [Text Block] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Services segment revenue Sales Revenue, Services, Net [Member] Number of reportable segments Number of Reportable Segments Percentage of net service revenue Concentration Risk, Percentage Number of pharmacies Number Of Pharmacies Number Of Pharmacies Number of physical therapy clinics Number Of Physical Therapy Clinics Number Of Physical Therapy Clinics Weighted average number of shares outstanding for basic per share calculation (in shares) Weighted Average Number of Shares Outstanding, Basic Effect of dilutive potential shares: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Nonvested stock (in shares) Nonvested Stock Awards Nonvested stock awards. Adjusted weighted average shares for diluted per share calculation (in shares) Weighted Average Number of Shares Outstanding, Diluted Anti-dilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Significant Accounting Policies Significant Accounting Policies [Text Block] Outstanding shares of Almost Family common stock as of April 1, 2018 Outstanding shares of Almost Family Outstanding shares of Almost Family Exchange ratio Exchange Ratio For Business Combination Exchange Ratio For Business Combination Shares of the Company issued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Price per share as of April 1, 2018 Shares Issued, Price Per Share Fair value of the Company common stock issued Stock Issued During Period, Value, Acquisitions Fair value of vested Almost Family equity awards exchanged for equity awards in the Company Stock Issued During Period, Value, AFAM Equity Award Exchange Stock Issued During Period, Value, AFAM Equity Award Exchange Preliminary merger consideration Business Combination, Consideration Transferred Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Treasury Treasury Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Noncontrolling Interest Non Redeemable Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, Amount Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Beginning balance (in shares) Shares, Issued Beginning balance, Treasury (in shares) Treasury Stock, Shares Net income Equity Profit Loss The consolidated profit or loss for the period, net of income taxes, excluding the portion attributable to noncontrolling interest - redeemable shown in the mezzanine section of the balance sheet. Acquired noncontrolling interest Noncontrolling Interest, Increase from Business Combination Noncontrolling interest distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders NCI acquired, net of sales Noncontrolling Interest, Increase from Sale of Parent Equity Interest Nonvested stock compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Restricted stock vesting Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Restricted stock vesting (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Treasury shares redeemed to pay income tax Treasury shares redeemed to pay income tax (in shares) Merger consideration Merger consideration (in shares) Stock Issued During Period, Shares, Acquisitions Issuance of common stock under Employee Stock Purchase Plan Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock under Employee Stock Purchase Plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Ending balance, Amount Ending balance (in shares) Ending balance, Treasury (in shares) Income Statement [Abstract] Gross margin Gross Profit Less net income attributable to noncontrolling interests Earnings per share attributable to LHC Group, Inc.'s common stockholders: Earnings Per Share, Basic [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Noncontrolling Interest [Abstract] Noncontrolling interest Noncontrolling Interest Disclosure [Text Block] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Noncontrolling interest-redeemable, beginning balance Redeemable Noncontrolling Interest, Equity, Carrying Amount Noncontrolling interest-redeemable distributions Temporary Equity, Decrease From Distributions To Noncontrolling Interest Holders Temporary Equity, Decrease From Distributions To Noncontrolling Interest Holders Acquired noncontrolling interest Temporary Equity, Increase From Business Combination Temporary Equity, Increase From Business Combination Noncontrolling interest-redeemable sale Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Noncontrolling interest-redeemable, ending balance Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash Receivables: Receivables, Net, Current [Abstract] Patient accounts receivable Accounts Receivable, Net, Current Other receivables Other Receivables Amounts due from governmental entities Amounts Due From Governmental Entities Amounts expected to be reimbursed by governmental entities based on annual reports filed at the balance sheet date. Total receivables Receivables, Net, Current Prepaid income taxes Prepaid Taxes Prepaid expenses Prepaid Expense, Current Other current assets Other Assets, Current Total current assets Assets, Current Property, building and equipment, net of accumulated depreciation of $52,804 and $43,565, respectively Property, Plant and Equipment, Net Goodwill Goodwill Intangible assets, net of accumulated amortization of $14,789 and $13,041, respectively Intangible Assets, Net (Excluding Goodwill) Assets held for sale Assets Held-for-sale, Not Part of Disposal Group Other assets Other Assets, Noncurrent Total assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and other accrued liabilities Accounts Payable and Other Accrued Liabilities, Current Salaries, wages, and benefits payable Employee-related Liabilities, Current Self-insurance reserve Self Insurance Reserve, Current Income tax payable Taxes Payable, Current Current portion of long-term debt Long-term Debt, Current Maturities Amounts due to governmental entities Amounts Due To Governmental Entities Amounts to be paid to governmental entities for payments received in excess of hospice cap limits and prior year costs report settlements. Total current liabilities Liabilities, Current Deferred income taxes Deferred Income Tax Liabilities, Net Income taxes payable Unrecognized Tax Benefits that Would Impact Effective Tax Rate Revolving credit facility Long term notes payable Notes Payable, Noncurrent Total liabilities Liabilities Noncontrolling interest — redeemable Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] LHC Group, Inc. stockholders’ equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock – $0.01 par value; 5,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Outstanding Common stock — $0.01 par value; 60,000,000 and 40,000,000 shares authorized in 2018 and 2017, respectively; 35,632,076 and 22,640,046 shares issued in 2018 and 2017, respectively Common Stock, Value, Outstanding Treasury stock — 4,958,423 and 4,890,504 shares at cost, respectively Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Total LHC Group, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent Noncontrolling interest — non-redeemable Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangibles Goodwill and Intangible Assets Disclosure [Text Block] Nonvested Stock Activity Schedule of Nonvested Share Activity [Table Text Block] Shares of Common Stock Issued During 2016 Under Employee Stock Purchase Plan Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Excess tax benefits associated with stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Transaction costs related to the Merger Payments for Merger Related Costs Unrecognized tax benefits Unrecognized Tax Benefits Summary of Activity of Noncontrolling Interest-Redeemable Redeemable Noncontrolling Interest [Table Text Block] Number of shares available, beginning balance (in shares) Shares Available Under Employee Stock Purchase Plan Shares available under employee stock purchase plan. Shares issued during period (in shares) Number of shares available, ending balance (in shares) Per share price of shares issued during period (in dollars per share) Price Of Share Issued Under Employee Stock Purchase Plan Weighted average per share price for shares issued during the period as a result of the employee stock purchase plan. Other Acquisitions and Joint Venture Activities Business Combination Disclosure [Text Block] Percentage of Net Service Revenue Earned by Type of Ownership or Relationship with Operating Entity Schedule Of Service Revenue Earned By Type Of Ownership Or Relationship With Operating Entity Table [Table Text Block] Tabular disclosure of the percentage of net service revenue earned by type of ownership or relationship with operating entity. Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Percentage of Net Service Revenue Earned by Category of Payor Disaggregation of Revenue [Table Text Block] Shares Used in Computation of Basic and Diluted Per Share Information Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Home health reporting unit Hospice reporting unit Home and community-based services reporting unit Facility-based reporting unit HCI reporting unit Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Balance at beginning of period Acquisitions Goodwill, Acquired During Period Noncontrolling interests Noncontrolling Interest, Period Increase (Decrease) Adjustments and disposals Net Goodwill Purchase Accounting Adjustments Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized, net of deferred tax adjustments. Balance at end of period Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trade Names Trade Names [Member] Certificates of need/licenses Licensing Agreements [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Customer Relationships [Member] Non-compete agreements Noncompete Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-lived Intangible Assets [Roll Forward] Finite-lived Intangible Assets [Roll Forward] Balance as of December 31, 2017 Indefinite lived assets, Acquisitions Indefinite-lived Intangible Assets Acquired Definite lived assets, Acquisitions Finite-lived Intangible Assets Acquired Amortization Amortization of Intangible Assets Adjustments & disposals Indefinite-lived Intangible Assets, Period Increase (Decrease) Balance as of September 30, 2018 Other assets, amount from government payors Other Assets, Amount From Government Payors Other Assets, Amount From Government Payors Period of joint venture buy/sell option Joint Venture Buy Sell Option Period Time frame in which the other joint venture party must either purchase all of the exercising member's membership interests or sell to the exercising member all of the non-exercising member's membership interests in the exercise of a joint venture buy/sell option. Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted stock Restricted Stock [Member] Options Employee Stock Option [Member] Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested shares outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Acquired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Acquired in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Acquired in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Nonvested shares outstanding, ending balance (in shares) Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Nonvested shares outstanding, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Acquired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Acquired in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Acquired in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Nonvested shares outstanding, ending balance (in dollars per share) Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Nonvested shares outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Acquired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Acquired, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Acquired, Number of Shares Vested or exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Nonvested shares outstanding, ending balance (in shares) Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Nonvested shares outstanding, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Acquired (in dollars per share) Share-based Compensation Arrangement By Share-based Payment Award Options Nonvested Weighted Average Grant Date Fair Value, Acquired Share-based Compensation Arrangement By Share-based Payment Award Options Nonvested Weighted Average Grant Date Fair Value, Acquired Vested or exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Nonvested shares outstanding, ending balance (in dollars per share) Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] Indefinite-lived Intangible Assets [Line Items] Indefinite-lived Intangible Assets [Line Items] Disposal of goodwill and intangible assets Disposal Group, Including Discontinued Operation, Goodwill And Intangible Assets Disposal Group, Including Discontinued Operation, Goodwill And Intangible Assets Estimated useful life Finite-Lived Intangible Asset, Useful Life Intangible assets, net carrying amount Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Property, building and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Preferred Stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred Stock, shares authorized Preferred Stock, Shares Authorized Preferred Stock, shares issued Preferred Stock, Shares Issued Preferred Stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued Common Stock, Shares, Issued Treasury stock at cost, shares Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] As previously reported Calculated under Revenue Guidance in Effect before Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Condensed Consolidated Balance Sheets Balance Sheet Related Disclosures [Abstract] Patient accounts receivable Accounts Receivable, Net Allowance for uncollectible accounts Allowance for Doubtful Accounts Receivable Condensed Consolidated Statements of Income: Provision for bad debts Provision for Doubtful Accounts Net income attributable to LHC Group, Inc.'s common stockholders Condensed Consolidated Statements of Cash Flows: Statement of Cash Flows [Abstract] Receivables Amortization period Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Trade name Certificates of need/licenses Certificate Of Need and Licenses [Member] Certificate Of Need and Licenses [Member] Stock Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Preliminary fair value of total consideration transferred Business Combination, Consideration Transferred [Abstract] Recognized amounts of identifiable assets acquired and liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Patient accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Prepaid income taxes Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Prepaid Income Taxes Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Prepaid Income Taxes Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Indefinite-lived intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Customer relationships Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Assets held for sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Held For Sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Held For Sale Deferred income taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accrued other liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Liabilities, Other Seller notes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed,Sellers Notes Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed,Sellers Notes Payable NCI- Redeemable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, NCI Redeemable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, NCI Redeemable Long term income taxes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unrecognized Tax Position Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unrecognized Tax Position Line of credit Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Line Of Credit Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Line Of Credit NCI- Nonredeemable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, NCI, Nonredeemable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, NCI, Nonredeemable Other assets and (liabilities), net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total identifiable assets and liabilities Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Preliminary goodwill Home health agencies and hospice agency Home Health Agencies And Hospice Agency [Member] Home Health Agencies And Hospice Agency [Member] Number of agencies Number Of Agencies Number Of Agencies Preliminary merger consideration Cash paid to for acquisitions Payments to Acquire Businesses, Gross Acquired nonontrolling interest Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Non Controlling Interest Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Non Controlling Interest Number of subsidiaries Number Of Subsidiaries Number Of Subsidiaries Proceeds for sale of ownership interest Proceeds from Divestiture of Businesses Reduction of APIC due to sale of ownership interests Additional Paid In Capital Decrease Due To Sale Of Noncontrolling Interests Additional Paid In Capital Decrease Due To Sale Of Noncontrolling Interests Increase to APIC due to purchase of joint venture Additional Paid In Capital Increase Due To Purchase Of Noncontrolling Interests Additional Paid In Capital Increase Due To Purchase Of Noncontrolling Interests Schedule of Changes in Recorded Goodwill by Reporting Unit Schedule of Goodwill [Table Text Block] Summary of Changes in Intangible Assets Schedule of Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Summary of Changes in Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block]