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Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Unrecognized tax benefits Unrecognized Tax Benefits The Davey 401KSOP and Employee Stock Ownership Plan [Text Block] Equity [Text Block] Costs and expenses: Costs and Expenses [Abstract] Shares subject to redemption Temporary Equity, Shares Outstanding Granted, weighted average exercise price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Unsecured debt, current borrowing capacity Unsecured debt, current borrowing capacity Unsecured debt, current borrowing capacity Entity Addresses [Line Items] Entity Addresses [Line Items] Working Capital Settlement, Measurement Period Adjustment Working Capital Settlement, Measurement Period Adjustment Working Capital Settlement, 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receivable, gross Accounts Receivable, before Allowance for Credit Loss, Current Adoption Date Trading Arrangement Adoption Date Common shares subscription receivable Common Stock, Share Subscribed but Unissued, Subscriptions Receivable Entity Addresses, Address Type [Axis] Entity Addresses, Address Type [Axis] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Shareholders' equity before treasury stock Stockholders' equity before treasury stock and common shares subscription receivable Stockholders' equity before treasury stock and common shares subscription receivable Total 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acquisitions Goodwill, Acquired During Period Granted, weighted average award date value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Liability recognized in revenue Contract with Customer, Liability, Revenue Recognized Less than one year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Subsequent Event Type [Domain] Subsequent Event Type [Domain] Revision of Prior Period [Domain] Revision of Prior Period [Domain] Forfeited, weighted average award date value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Available-for- Sale Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Cash Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Net change related to available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity current reporting status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Liabilities, fair value disclosure [Abstract] Liabilities, Fair Value Disclosure [Abstract] Land and buildings Payments to Acquire Real Estate Other Assets, Noncurrent [Abstract] Other Assets, Noncurrent [Abstract] Loss Contingency, Damages Paid, Value Loss Contingency, Damages Paid, Value Business Combination [Table Text Block] Business Combination [Table Text Block] Adjustments to reconcile net income to net cash provided by operating activities net of assets/liabilities acquired: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Financial Instruments [Domain] Financial Instruments [Domain] Stock subscription offering, down payment Stock subscription offering, down payment Stock subscription offering, down payment Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Options exercised Stock Issued During Period, Value, Stock Options Exercised Identified intangible assets and goodwill, net [Text Block] Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Revenue from contract from customer [Text Block] Revenue from Contract with Customer [Text Block] Prepaid expenses Prepaid Expense, Current Forfeited, weighted average exercise price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Cash Cash Per share amounts and common and redeemable shares outstanding [Text Block] Per Share Amounts and Shares Outstanding [Text Block] Per Share Amounts and Shares Outstanding [Text Block] Mitigation bank credit inventory Increase (Decrease) in Inventories Operating lease, weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Address type [Domain] Address Type [Domain] Stock subscription offering, interest rate Stock subscription offering interest rate Stock subscription offering interest rate Stock subscription offering, minimum amount to receive right Stock subscription offering, minimum amount to receive right Stock subscription offering, minimum amount to receive right Segment Reporting [Table] Segment Reporting [Table] Company shares held in 401KSOP, fair value Company shares held in 401KSOP and ESOP, fair value Company shares held in 401KSOP and ESOP, fair value Income and expenses, lessee [Table Text Block] Lease, Cost [Table Text Block] Schedule of available-for-sale securities reconciliation Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Other current assets Total Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance 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Payment Arrangement, Option, Activity [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Treasury stock, shares Treasury Stock, Common, Shares Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Total Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Equity components [Axis] Equity Components [Axis] Income taxes paid Income Tax Paid, after Refund Received Estimated annual effective tax rate Estimated annual effective tax rate Estimated annual effective tax rate Entity interactive data current Entity Interactive Data Current Current portion of finance lease liabilities Finance Lease, Liability, Current Variable Rate [Axis] Variable Rate [Axis] Deferred compensation Deferred 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from Acquisition Cash Acquired from Acquisition Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity tax identification number Entity Tax Identification Number Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital Self-insurance accruals Self Insurance Reserve, Current Exercised, weighted average exercise price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Other Other Accrued Liabilities, Current Entity incorporation, state Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] 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] Fair value, 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Equity Awards Adjustments [Member] Accounts receivable, net [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Base Rate, Federal Funds [Member] Base Rate, Federal Funds [Member] Base Rate, Federal Funds [Member] Other Other income (expense), net Other Nonoperating Income (Expense) Short and long-term debt and commitments related to letters of credit [Text Block] Long-Term Debt [Text Block] 6.19% Senior unsecured notes 6.19% Senior unsecured notes [Member] 6.19% Senior unsecured notes 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative General and Administrative Expense Cash Flow, Financing Activities, Lessee [Abstract] Cash Flow, Financing Activities, Lessee [Abstract] Fair value measurements and financial instruments Derivatives and Fair Value [Text Block] Income and expenses, lessee [Table] Income and expenses, lessee [Table] Income and expenses, lessee [Table] Class of Stock [Domain] Class of Stock [Domain] Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Schedule of common and redeemable shares outstanding [Table Text Block] Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income taxes [Text Block] Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Other Other Noncash Income (Expense) 2031 Lessee, Operating Lease, Liability, to be Paid, Year Five Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Investment in businesses Business Combination, Consideration Transferred Entity filer category Entity Filer Category Revision of Prior Period [Axis] Revision of Prior Period [Axis] Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Finance Lease, Liability, Payments, Due Next Twelve Months Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Other current assets Prepaid Expense and Other Assets, Current [Abstract] Investments, Debt and Equity Securities [Abstract] Defined contribution plan, service requirement for eligibility Defined Contribution Plan, Service Requirement for Eligibility Defined Contribution Plan, Service Requirement for Eligibility Current assets: Assets, Current [Abstract] Total lease liabilities Lease liability, operating and finance Lease liability, operating and finance Debt Instrument, Adjustment To EBITDA, Maximum Amount Debt Instrument, Adjustment To EBITDA, Maximum Amount Debt Instrument, Adjustment To EBITDA, Maximum Amount Entity address, address line one Entity Address, Address Line One Right-of-use asset obtained in exchange for lease obligations, operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested, weighted average award date value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income taxes Income Tax Expense (Benefit) Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Employee Stock Ownership Plan (ESOP), Plan [Domain] Employee Stock Ownership Plan (ESOP), Plan [Domain] Customer advances, deposits Contract with customer, liability, customer deposits, current Contract with customer, liability, customer deposits, current Statement [Table] Statement [Table] stock subscription offering, value of shares subscribed stock subscription offering, value of shares subscribed stock subscription offering, value of shares subscribed Exchange traded funds Exchange Traded Funds [Member] Interest income Investment Income, Interest Contract with customer, asset and liability [Table Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Incremental shares from assumed exercise of stock subscription purchase rights Incremental common shares attributable to exercise of stock subscription purchase rights Incremental common shares attributable to exercise of stock subscription purchase rights Self-insurance accruals Increase (Decrease) in Self Insurance Reserve Basis of financial statement preparation [Text Block] Basis of Presentation and Significant Accounting Policies [Text Block] Prepaid expense Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current