Income Tax Disclosure [Abstract]
Less: (income) prior to the Reorganization Transactions
Income (Loss), Before Reorganization Transactions, Before Income Taxes
Income (Loss), Before Reorganization Transactions, Before Income Taxes
Income (loss) before taxes
Income (Loss) Attributable To Parent, Before Income Taxes
Income (Loss) Attributable To Parent, Before Income Taxes
Income taxes at U.S. federal statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Tax on income not subject to entity level federal income tax
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount
Non-deductible stock compensation costs
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount
Non-controlling interest
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount
Other permanent differences
Effective Income Tax Reconciliation, Other Permanent Differences, Amount
Effective Income Tax Reconciliation, Other Permanent Differences, Amount
State income tax, net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Other
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Income tax expense
Income Tax Expense (Benefit)
Accounting Policies [Abstract]
Basis of Combination
Consolidation, Policy [Policy Text Block]
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Capitalized IPO Related Costs
Deferred Offering Costs, Policy [Policy Text Block]
Deferred Offering Costs, Policy [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Recently Issued Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Framework for Measuring Fair Value
Fair Value Measurement, Policy [Policy Text Block]
Receivables [Abstract]
Franchise Fees Receivable
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Sale of Stock [Axis]
Sale of Stock [Axis]
Sale of Stock [Domain]
Sale of Stock [Domain]
Initial Public Offering
IPO [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]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Omnibus Incentive Plan
Omnibus Incentive Plan [Member]
Omnibus Incentive Plan [Member]
Award Type [Axis]
Award Type [Axis]
Equity Award [Domain]
Equity Award [Domain]
Employee Stock Option
Employee Stock Option [Member]
Employee stock purchase plan
Employee Stock [Member]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Class B Common Stock
Common Class B [Member]
LLC Units
LLC Units [Member]
LLC Units [Member]
Class A Common Stock
Common Class A [Member]
LLC Units And Common Class B
LLC Units And Common Class B [Member]
LLC Units And Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends
Payments of Ordinary Dividends, Common Stock
Share price (in dollars per share)
Sale of Stock, Price Per Share
Equity-based compensation expense
Allocated Share-based Compensation Expense
Conversion ratio
Sale Of Stock, Conversion Of Existing Interests, Conversion Ratio
Sale Of Stock, Conversion Of Existing Interests, Conversion Ratio
Shares issued (in shares)
Stock Issued During Period, Shares, New Issues
Shares issued (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Grant price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Compensation cost
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options
Period for recognition
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Shares available for grant (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Schedule of Financing Receivable, Allowance for Credit Losses [Table]
Schedule of Financing Receivable, Allowance for Credit Losses [Table]
Receivable Type [Axis]
Receivable Type [Axis]
Receivable [Domain]
Receivable [Domain]
Franchise Fees Receivable
Franchise Fees Receivable [Member]
Franchise Fees Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance
Financing Receivable, Allowance for Credit Losses
Charges to bad debts
Provision for Loan, Lease, and Other Losses
Write offs
Financing Receivable, Allowance for Credit Losses, Write-downs
Ending balance
Uncertain tax positions
Unrecognized Tax Benefits
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Members' deficit
Member Units [Member]
Common stock
Common Stock [Member]
Additional paid in capital
Additional Paid-in Capital [Member]
Accumulated deficit
Retained Earnings [Member]
Parent
Parent [Member]
Noncontrolling Interest
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 (in shares)
Shares, Outstanding
Beginning balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Net income
Net Income (Loss) Attributable to Parent
Distributions
Dividends
Effects of the Reorganization Transactions (in shares)
Stock Issued During Period, Shares, Effects Of The Reorganization Transaction
Stock Issued During Period, Shares, Effects Of The Reorganization Transaction
Effects of the Reorganization Transactions
Stock Issued During Period, Value, Effects Of The Reorganization Transaction
Stock Issued During Period, Value, Effects Of The Reorganization Transaction
Initial non-controlling interest allocation
Noncontrolling Interest, Increase from Subsidiary Equity Issuance
Issuance of Class A common stock sold in initial public offering, net of offering costs (in shares)
Issuance of Class A common stock sold in initial public offering, net of offering costs
Stock Issued During Period, Value, New Issues
Equity-based compensation subsequent to initial public offering
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Deferred tax adjustments
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net
Ending balance (in shares)
Ending balance
Document And Entity Information [Abstract]
Document And Entity Information [Abstract]
Entities [Table]
Entities [Table]
Entity Information [Line Items]
Entity Information [Line Items]
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
Document Type
Document Type
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Amendment Flag
Amendment Flag
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Income Taxes
Income Tax Disclosure [Text Block]
Debt Disclosure [Abstract]
Schedule of Interest Rate Dependent of Leverage Ratio
Schedule Of Interest Rate Dependent Of Leverage Ratio [Table Text Block]
Schedule Of Interest Rate Dependent Of Leverage Ratio [Table Text Block]
Schedule of Maturities of Note Payable
Schedule of Maturities of Long-term Debt [Table Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Note Payable
Debt Disclosure [Text Block]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Agency Fees
Agency Fees Receivables [Member]
Agency Fees Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance
Allowance for Doubtful Accounts Receivable
Bad debt expense
Provision for Doubtful Accounts
Write offs
Allowance for Doubtful Accounts Receivable, Write-offs
Ending balance
Allowance for Uncollectible Agency Fees
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]
Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Goosehead Management Note and Texas Wasatch Note
Goosehead Management Note And Texas Wasatch Note [Member]
Goosehead Management Note And Texas Wasatch Note [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
Pre-IPO LLC Members
Pre-IPO LLC Members [Member]
Pre-IPO LLC Members [Member]
Goosehead Management, LLC And Texas Wasatch Insurance Holdings Group LLC
Goosehead Management, LLC And Texas Wasatch Insurance Holdings Group LLC [Member]
Goosehead Management, LLC And Texas Wasatch Insurance Holdings Group LLC [Member]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Goosehead Insurance Holding, LLC
Goosehead Insurance Holding, LLC [Member]
Goosehead Insurance Holding, LLC [Member]
Goosehead Insurance, Inc.
Goosehead Insurance, Inc. [Member]
Goosehead Insurance, Inc. [Member]
Ownership [Axis]
Ownership [Axis]
Ownership [Domain]
Ownership [Domain]
Texas Wasatch Insurance Services, L.P.
Texas Wasatch Insurance Services, L.P. [Member]
Texas Wasatch Insurance Services, L.P. [Member]
Goosehead Insurance Agency, LLC
Goosehead Insurance Agency, LLC [Member]
Goosehead Insurance Agency, LLC [Member]
Goosehead Financial, LLC
Goosehead Financial, LLC [Member]
Goosehead Financial, LLC [Member]
Over-Allotment Option
Over-Allotment Option [Member]
Subsidiary, Sale of Stock [Line Items]
Subsidiary, Sale of Stock [Line Items]
Shares issued (in shares)
Sale of Stock, Number of Shares Issued in Transaction
Ownership interest
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest
Corporate-owned locations
Number Of Corporate-Owned Locations
Number Of Corporate-Owned Locations
Franchise locations sold
Significant Changes, Franchises Sold
Operating franchise locations
Significant Changes, Franchised Outlets in Operation
Franchises purchased
Significant Changes, Franchises Purchased During Period
Number of classes
Common Stock, Number Of Classes
Common Stock, Number Of Classes
Vote per share
Common Stock, Vote Per Share
Common Stock, Vote Per Share
Conversion ratio
Common Stock, Conversion Of Existing Interests
Common Stock, Conversion Of Existing Interests
Principal amount of debt
Debt Instrument, Face Amount
Segment Reporting [Abstract]
Segment Information
Segment Reporting Disclosure [Text Block]
Schedule of Reconciliation of Income Tax Expense
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Income before Income Taxes
Schedule Of Income Before Income Taxes [Table Text Block]
Schedule Of Income Before Income Taxes [Table Text Block]
Schedule of Components of Income Tax Expense
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Leverage Ratio Threshold [Axis]
Leverage Ratio Threshold [Axis]
Leverage Ratio Threshold [Axis]
Leverage Ratio Threshold [Domain]
Leverage Ratio Threshold [Domain]
[Domain] for Leverage Ratio Threshold [Axis]
Less than 1.50
Threshold One [Member]
Threshold One [Member]
Greater than 1.50
Threshold Two [Member]
Threshold Two [Member]
Greater than 2.50
Threshold Three [Member]
Threshold Three [Member]
Greater than 3.50
Threshold Four [Member]
Threshold Four [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Leverage ratio
Leverage Ratio
Leverage Ratio
Basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Schedule of Future Minimum Lease Payments
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2018
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year
2019
Long-term Debt, Maturities, Repayments of Principal in Year Two
2020
Long-term Debt, Maturities, Repayments of Principal in Year Three
2021
Long-term Debt, Maturities, Repayments of Principal in Year Four
Note payable outstanding
Long-term Debt, Gross
Income Statement [Abstract]
Class B Unit
Capital Unit, Class B [Member]
Class B Unit Compensation
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year
2019
Operating Leases, Future Minimum Payments, Due in Two Years
2020
Operating Leases, Future Minimum Payments, Due in Three Years
2021
Operating Leases, Future Minimum Payments, Due in Four Years
2022
Operating Leases, Future Minimum Payments, Due in Five Years
2023-2029
Operating Leases Future Minimum Payments Due In Six To Twelve Years
Operating Leases Future Minimum Payments Due In Six To Twelve Years
Future minimum payments
Operating Leases, Future Minimum Payments Due
Equity [Abstract]
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Pro Forma
Pro Forma [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Pro forma earnings per share:
Earnings Per Share, Pro Forma [Abstract]
Less: income (loss) before taxes attributable to non-controlling interests
Income (Loss) Before Income Taxes, Attributable To Noncontrolling Interest
Income (Loss) Before Income Taxes, Attributable To Noncontrolling Interest
Income (loss) before taxes attributable to GSHD
Net Income (Loss) Before Income Taxes, Attributable To Parent
Net Income (Loss) Before Income Taxes, Attributable To Parent
Less: pro forma income tax expense
Less: income tax expense attributable to GSHD
Income Tax Expense (Benefit), Portion Attributable To Parent
Income Tax Expense (Benefit), Portion Attributable To Parent
Net loss attributable to Goosehead Insurance, Inc.
Net Income (Loss) Available to Common Stockholders, Basic
Weighted average shares of Class A common stock outstanding - basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Pro forma weighted average shares of Class A common stock outstanding - basic (in shares)
Weighted Average Basic Shares Outstanding, Pro Forma
Effect of dilutive securities (in shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
Weighted average shares of Class A common stock outstanding - diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Pro forma weighted average shares of Class A common stock outstanding - diluted (in shares)
Pro Forma Weighted Average Shares Outstanding, Diluted
Earnings per share of Class A common stock - basic (in dollars per share)
Earnings Per Share, Basic
Pro forma earnings per share of Class A common stock - basic (in dollars per share)
Basic Earnings Per Share, Pro Forma
Earnings per share of Class A common stock - diluted (in dollars per share)
Earnings Per Share, Diluted
Pro forma earnings per share of Class A common stock - diluted (in dollars per share)
Diluted Earnings Per Share Pro Forma
Antidilutive securities excluded (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Restatement [Axis]
Restatement [Axis]
Restatement [Domain]
Restatement [Domain]
Restatement Adjustment
Restatement Adjustment [Member]
Class of Stock [Line Items]
Class of Stock [Line Items]
Common stock shares outstanding (in shares)
Common Stock, Shares, Outstanding
Distributions
Payments of Distributions to Affiliates
Ownership interest held by non-controlling interest holders
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
Dividends
Number of reportable segments
Number of Reportable Segments
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Commissions and agency fees
Commissions And Agency Fees [Member]
Commissions And Agency Fees [Member]
Franchise revenues
Franchise [Member]
Interest income
Interest Income1 [Member]
Interest Income1
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Operating Segments
Operating Segments [Member]
Other
Corporate And Reconciling Items [Member]
Corporate And Reconciling Items [Member]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Corporate Channel
Corporate Channel [Member]
Corporate Channel [Member]
Franchise Channel
Franchise Channel [Member]
Franchise Channel [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenues:
Revenues [Abstract]
Revenues
Revenues
Operating Expenses:
Operating Expenses [Abstract]
Employee compensation and benefits, excluding equity-based compensation
Employee Compensation And Benefits, Excluding Share-based Compensation
Employee Compensation And Benefits, Excluding Share-based Compensation
General and administrative expenses
General and Administrative Expense
Bad debts
Total operating expenses
Operating Expenses, Excluding Depreciation, Depletion, And Amortization
Operating Expenses, Excluding Depreciation, Depletion, And Amortization
Adjusted EBITDA
Earnings Before Interest, Taxes, Depreciation, And Amortization
Earnings Before Interest, Taxes, Depreciation, And Amortization
Other income (expense)
Other Nonoperating Income (Expense)
Equity-based compensation
Interest expense
Interest Expense
Depreciation and amortization
Depreciation, Depletion and Amortization
Taxes
Net income (loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Total Assets
Assets
Summary of Equity-Based Compensation Expense
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Schedule of Stock Options Valuation Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Allowance for Uncollectible Agency Fees
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Franchise fees receivable
Financing Receivable, Gross
Less: Unamortized discount
Receivable with Imputed Interest, Discount
Less: Allowance for uncollectible franchise fees
Total franchise fees receivable
Financing Receivable, Net
Investment in partnership
Deferred Tax Liabilities, Investment in Noncontrolled Affiliates
Net deferred tax asset (liability)
Deferred Tax Liabilities, Net
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net (loss) income
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
Loss on disposal of fixed assets
Gain (Loss) on Disposition of Property Plant Equipment
Equity-based compensation
Share-based Compensation
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Commissions and agency fees receivable
Increase (Decrease) In Accounts Receivable - Commissions And Agency Fees Receivable
Increase (Decrease) In Accounts Receivable - Commissions And Agency Fees Receivable
Receivable from franchisees
Increase (Decrease) In Accounts Receivable - Franchise Receivable
Increase (Decrease) In Accounts Receivable - Franchise Receivable
Prepaid expenses
Increase (Decrease) in Prepaid Expense
Other assets
Increase (Decrease) in Other Operating Assets
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Deferred rent
Increase (Decrease) In Deferred Rent Credit
Increase (Decrease) In Deferred Rent Credit
Premiums payable
Increase (Decrease) In Premiums Payable
Increase (Decrease) In Premiums Payable
Unearned revenue
Increase (Decrease) in Contract with Customer, Liability
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Changes in restricted cash
Increase (Decrease) in Restricted Cash
Proceeds from member note receivable
Repayment of Notes Receivable from Related Parties
Proceeds from notes receivable
Proceeds from Sale and Collection of Notes Receivable
Purchase of software
Payments for Software
Purchase of property and equipment
Payments to Acquire Property, Plant, and Equipment
Net cash used for investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Loan origination fees
Amortization of Debt Issuance Costs
Repayment of note payable
Repayments of Secured Debt
Proceeds from notes payable
Proceeds from Issuance of Secured Debt
Proceeds from the issuance of Class A common stock sold in initial public offering, net of underwriting discounts and offering costs
Proceeds from Issuance Initial Public Offering
Member distributions
Payments of Dividends
Net cash provided by (used for) financing activities
Net Cash Provided by (Used in) Financing Activities
Net increase in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash, beginning of period
Cash and Cash Equivalents, at Carrying Value
Cash, end of period
Supplemental disclosures:
Supplemental Cash Flow Information [Abstract]
Management fee note repayment through issuance of Class A common stock
Stock Issued
Litigation
Legal Matters and Contingencies [Text Block]
Equity-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Other Income and Expenses [Abstract]
Gain on transaction
Gain (Loss) on Disposition of Assets
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]
Secured Debt
Secured Debt [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Maximum borrowing availability
Line of Credit Facility, Maximum Borrowing Capacity
Additional commitments
Line Of Credit Facility, Maximum Borrowing Capacity, Additional Commitments
Line Of Credit Facility, Maximum Borrowing Capacity, Additional Commitments
Revolver balance
Long-term Line of Credit
Debt issuance costs
Debt Issuance Costs, Net
Amortization period
Debt Issuance Costs, Amortization Period
Debt Issuance Costs, Amortization Period
Remaining borrowing availability
Line of Credit Facility, Remaining Borrowing Capacity
Letter of credit
Letters of Credit Outstanding, Amount
Interest expense
Interest Expense, Debt
Aggregate principal amount
Quarterly payments, first twelve months
Debt Instrument, Periodic Payment, Principal, Next Twelve Months
Debt Instrument, Periodic Payment, Principal, Next Twelve Months
Quarterly payments, next twelve months
Debt Instrument, Periodic Payment, Principal, Year Two
Debt Instrument, Periodic Payment, Principal, Year Two
Quarterly payments, last twelve months
Debt Instrument, Periodic Payment, Principal, Year Three
Debt Instrument, Periodic Payment, Principal, Year Three
Write off of loan origination fees
Write off of Deferred Debt Issuance Cost
Subsequent Events [Abstract]
Subsequent Events
Subsequent Events [Text Block]
IPO related costs included in other assets
Deferred Offering Costs
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Current Assets
Assets, Current [Abstract]
Cash and cash equivalents
Restricted cash
Restricted Cash, Current
Commissions and agency fees receivable, net
Accounts Receivable, Net, Current - Commissions And Agency Fees Receivable
Accounts Receivable, Net, Current - Commissions And Agency Fees Receivable
Receivable from franchisees, net
Accounts Receivable, Net, Current - Franchise Receivable
Accounts Receivable, Net, Current - Franchise Receivable
Prepaid expenses
Prepaid Expense, Current
Total current assets
Assets, Current
Receivable from franchisees, net of current portion
Accounts Receivable, Net, Noncurrent - Franchise Receivable
Accounts Receivable, Net, Noncurrent - Franchise Receivable
Property and equipment, net of accumulated depreciation
Property, Plant and Equipment, Net
Intangible assets, net of accumulated amortization
Intangible Assets, Net (Excluding Goodwill)
Other assets
Other Assets, Noncurrent
Total assets
Liabilities and Stockholders’ Equity
Liabilities and Equity [Abstract]
Current Liabilities:
Liabilities, Current [Abstract]
Accounts payable and accrued expenses
Accounts Payable and Accrued Liabilities, Current
Premiums payable
Premiums Payable, Current
Premiums Payable, Current
Unearned revenue
Contract with Customer, Liability, Current
Dividends payable
Dividends Payable, Current
Deferred rent
Deferred Rent Credit, Current
Note payable
Long-term Debt, Current Maturities
Total current liabilities
Liabilities, Current
Deferred income taxes, net
Deferred Income Tax Liabilities, Net
Deferred rent, net of current portion
Deferred Rent Credit, Noncurrent
Note payable, net of current portion
Long-term Debt, Excluding Current Maturities
Total liabilities
Liabilities
Commitments and contingencies (see note 6)
Commitments and Contingencies
Members’ deficit
Members' Equity
Common stock
Common Stock, Value, Issued
Additional paid in capital
Additional Paid in Capital
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Total stockholders' equity and members' deficit
Stockholders' Equity Attributable to Parent
Non-controlling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Total equity
Total liabilities and stockholders' equity
Liabilities and Equity
Organization
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Schedule of Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Other income (expense)
Other Income and Other Expense Disclosure [Text Block]
Stockholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Employee compensation and benefits (including Class B unit compensation of $0 and $26,134 for the three and nine months ended September 30, 2018, respectively, and $1,150 and $1,335 for the three and nine months ended September 30, 2017, respectively)
Labor and Related Expense
Total operating expenses
Operating Expenses
Income (loss) from operations
Operating Income (Loss)
Other Income (Expense):
Other Nonoperating Income (Expense) [Abstract]
Income tax expense
Less: net (loss) income attributable to non-controlling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net income (loss) attributable to Goosehead Insurance, Inc.
Earnings per share:
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)
Diluted (in dollars per share)
Weighted average shares of Class A common stock outstanding
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Basic (in shares)
Diluted (in shares)
Pro forma income before taxes attributable to Goosehead Insurance, Inc.
Tax expense
Basic (in dollars per share)
Diluted (in dollars per share)
Pro forma weighted average shares of Class A common stock outstanding - diluted (in shares)
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Pro forma number of LLC Units outstanding (in shares)
Weighted Average General Partnership Units Outstanding
Ownership interest held by Goosehead Insurance, Inc.
Noncontrolling Interest, Ownership Percentage by Parent
Ownership interest
Noncontrolling Interest, Ownership Percentage
Noncontrolling Interest, Ownership Percentage
Summary of Pro Forma Ownership Interest
Schedule of Weighted Average Number of Shares [Table Text Block]
Schedule of Calculation of EPS and Pro Forma EPS
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block]
Common stock par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock shares authorized (in shares)
Common Stock, Shares Authorized
Common stock shares issued (in shares)
Common Stock, Shares, Issued
Expected volatility
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate
Expected dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Expected Dividend
Expected term (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Risk-free interest rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Schedule of Franchise Fees Receivable
Schedule of Allowance For Uncollectible Franchise Fees
Allowance for Credit Losses on Financing Receivables [Table Text Block]