Summary of Significant Accounting Policies and Recently Issued Accounting Standards
Significant Accounting Policies [Text Block]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Property, plant and equipment
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment
Consideration transferred including preliminary adjustments
Business Combination, Consideration Transferred, Including Preliminary Adjustments
Business Combination, Consideration Transferred, Including Preliminary Adjustments
Non-cash impairment charge
Equity Method Investment, Non Cash Impairment Charge
Equity Method Investment, Non Cash Impairment Charge
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Award Timing Predetermined
Award Timing Predetermined [Flag]
Weighted average effective interest rate (as a percent)
Long-Term Debt, Weighted Average Interest Rate, at Point in Time
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Entity File Number
Entity File Number
Additional Paid-In-Capital
Additional Paid-in Capital [Member]
Equity in net (loss) income of non-consolidated affiliates
Equity in net income of non-consolidated affiliates
Income (Loss) from Equity Method Investments
Tabular List, Table
Tabular List [Table Text Block]
Excluding business acquisition
Effective Income Tax Rate Reconciliation, Excluding Business Acquisition, Percent
Effective Income Tax Rate Reconciliation, Excluding Business Acquisition, Percent
Earnings per share:
Earnings Per Share, Basic [Abstract]
Supplemental Financial Information
Additional Financial Information Disclosure [Text Block]
Stock consideration transferred
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares
Recently Issued Accounting Standards and Recently Adopted Accounting Standards
New Accounting Pronouncements, Policy [Policy Text Block]
Accounts payable
Increase (Decrease) in Accounts Payable
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Projected revenue
Asset Acquisition, Projected Revenue, Amount
Asset Acquisition, Projected Revenue, Amount
Decrease in AOCL
Defined Benefit Plan, Settlement, Decrease In Accumulated Other Comprehensive Income (Loss)
Defined Benefit Plan, Settlement, Decrease In Accumulated Other Comprehensive Income (Loss)
Basic earnings per share (in dollars per share)
Earnings Per Share, Basic
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Revenue from Contract with Customer
Revenue from Contract with Customer [Text Block]
Total other comprehensive income
Other comprehensive income, net of tax
Other Comprehensive Income (Loss), Net of Tax
Balance at beginning of period
Balance at end of period
Extended Product Warranty Accrual
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Stock option activity (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Restricted stock activity (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures
Cash consideration transferred for the Plattsburgh, New York real estate
Business Combination, Consideration Transferred, Cash Consideration For Real Estate
Business Combination, Consideration Transferred, Cash Consideration For Real Estate
Revenue, remaining performance obligation
Revenue, Remaining Performance Obligation, Amount
Bus
Bus [Member]
Bus [Member]
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Other assets
Increase (Decrease) in Other Operating Assets
Share-based compensation expense
Share-Based Payment Arrangement, Noncash Expense
Deferred warranty income
Extended Product Warranty Accrual, Current
Options
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Equity investment in affiliates (Note 11)
Equity investment in affiliates (Note 11)
Payments to Acquire Equity Method Investments
Total stockholders' equity
Beginning Balance
Ending Balance
Equity, Attributable to Parent
Other comprehensive income, net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Insider Trading Policies and Procedures [Line Items]
Equity in net income of consolidated affiliates
Equity In Net Income of Consolidation Affiliates
Equity In Net Income of Consolidation Affiliates
Common Stock, Shares Authorized
Common Stock, Shares Authorized
Current assets
Assets, Current [Abstract]
Total liabilities and stockholders' equity
Liabilities and Equity
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Defined Benefit Pension Plan (Note 14)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Acquisitions (in shares)
Stock Issued During Period, Shares, Acquisitions
Long-term debt
Senior Notes, Noncurrent
Liabilities and Stockholders' Equity
Liabilities and Equity [Abstract]
Maximum
Maximum [Member]
Benefit obligation
Liability, Defined Benefit Plan
Equity Method Investment [Table]
Equity Method Investment [Table]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Lump sum distribution
Defined Benefit Plan, Lump Sum Distribution, Amount
Defined Benefit Plan, Lump Sum Distribution, Amount
Restricted Stock
Restricted Stock [Member]
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
Retirement Benefits [Abstract]
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Business Combination
Business Combination [Text Block]
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Shell Company
Entity Shell Company
Other liabilities
Other Liabilities, Noncurrent
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Rest of world
Rest of World [Member]
Rest of World [Member]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Operating Segments
Operating Segments [Member]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Current portion of long-term debt
Long-Term Debt, Current Maturities
Company Selected Measure Amount
Company Selected Measure Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Name
Measure Name
Letters of Credit
Letter of Credit [Member]
Total before taxes
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent
Deferred tax liabilities
Deferred Income Tax Liabilities, Net
Document Fiscal Period Focus
Document Fiscal Period Focus
Award Timing Method
Award Timing Method [Text Block]
Award Type [Axis]
Award Type [Axis]
Foreign Currency Translation Adjustment
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Long-term Debt
Total debt
Long-Term Debt
Goodwill, Including Goodwill Acquired
Goodwill, Including Goodwill Acquired
Goodwill, Including Goodwill Acquired
Schedule of Pro Forma Financial Results
Business Combination, Pro Forma Information [Table Text Block]
Total assets
Assets
Investment, Name [Domain]
Investment, Name [Domain]
Trading Symbol
Trading Symbol
Engineering designs
Engineering Designs [Member]
Engineering Designs
Parts
Parts [Member]
Parts [Member]
Geographical [Domain]
Geographical [Domain]
Warranty
Standard Product Warranty Accrual, Noncurrent
Entity Address, City or Town
Entity Address, City or Town
Cash flows from operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Estimated Useful Life (in years)
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Percentage of plan settled (over)
Defined Benefit Pension Plan, Percentage Of Plan Settled
Defined Benefit Pension Plan, Percentage Of Plan Settled
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Total consideration transferred
Business Combination, Consideration Transferred
Schedule of Identified Intangible Assets Acquired
Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block]
Entity Emerging Growth Company
Entity Emerging Growth Company
2029
Long-Term Debt, Maturity, Year Three
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Right-of-use assets obtained in exchange for operating lease obligations
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Transaction closing period
Asset Acquisition, Transaction Closing Period
Asset Acquisition, Transaction Closing Period
Total assets acquired
Business Combination, Recognized Asset Acquired, Asset
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Income Tax Examination [Line Items]
Income Tax Examination [Line Items]
Equity investment in affiliates
Equity Method Investments
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Business Combination [Domain]
Business Combination [Domain]
Increase in deferred tax liability
Defined Benefit Plan, Settlement, Increase In Deferred Tax Liability
Defined Benefit Plan, Settlement, Increase In Deferred Tax Liability
Alternative fuel buses
Alternative Fuel Buses [Member]
Alternative Fuel Buses [Member]
Common Stock, Shares Outstanding
Common Stock, Shares, Outstanding
PEO
PEO [Member]
Condensed Financial Information [Abstract]
Condensed Financial Information [Abstract]
Condensed Financial Information [Abstract]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Non-cash investing and financing activities:
Noncash Investing and Financing Items [Abstract]
Interest income
Investment Income, Interest
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Pension (Note 14)
Assets for Plan Benefits, Defined Benefit Plan
U.S.
UNITED STATES
Changes in assets and liabilities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Percentage released on April 1, 2029
Exchangeable Common And Preferred Voting Stock, Period Three Release, Percent
Exchangeable Common And Preferred Voting Stock, Period Three Release, Percent
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Product Warranties
Schedule of Product Warranty Liability [Table Text Block]
Diesel buses
Diesel Buses [Member]
Diesel Buses [Member]
Retained Earnings
Retained Earnings [Member]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Income Statement [Abstract]
Income tax expense
Income Tax Expense (Benefit)
Balance at beginning of period
Balance at end of period
Standard Product Warranty Accrual
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Product and Service [Domain]
Product and Service [Domain]
Exchangeable Shares, Issued
Exchangeable Shares, Issued
Exchangeable Shares, Issued
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Business Combination [Table]
Business Combination [Table]
Term of share repurchase program
Share Repurchase Program, Period in Force
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Assets Acquired and Liabilities Assumed
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Goodwill arising from the Micro Bird acquisition
Goodwill, Acquired During Period
City Area Code
City Area Code
Business acquisition, net of cash acquired (Note 13)
Payments to Acquire Businesses, Net of Cash Acquired
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Weighted average diluted securities, warrants
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Total consideration transferred for the Micro Bird interest
Business Combination, Consideration Transferred, Cash, Equity And Previous Interest
Business Combination, Consideration Transferred, Cash, Equity And Previous Interest
Cash flows from investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Total cash provided by operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Equity Method Investments and Joint Ventures [Abstract]
Preferred Stock, Par Value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Subsequent event
Subsequent Event [Member]
Other current assets
Business Combination, Recognized Asset Acquired, Other Asset, Current
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Goodwill
Goodwill
Goodwill
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Assets acquired
Business Combination, Recognized Asset Acquired, Asset [Abstract]
Payments for asset acquisitions
Payments for Asset Acquisitions
Payments for Asset Acquisitions
Equity Components [Axis]
Equity Components [Axis]
Sales agreement period
Asset Acquisition, Sales Agreement Period
Asset Acquisition, Sales Agreement Period
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Number of Reportable Segments
Number of Reportable Segments
Defined Benefit Pension Plan Settlement and Termination
Compensation and Employee Benefit Plans [Text Block]
Inventories
Business Combination, Recognized Asset Acquired, Inventory, Current
Cash received from stock option exercises
Payments for (Proceeds from), Tax Withholding, Share-based Payment Arrangement
Payments for (Proceeds from), Tax Withholding, Share-based Payment Arrangement
Nature of Business and Basis of Presentation
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]
Supplemental disclosures of cash flow information
Supplemental Cash Flow Information [Abstract]
Other Performance Measure, Amount
Other Performance Measure, Amount
Entity Address, State or Province
Entity Address, State or Province
Principal payments on finance leases
Finance Lease, Principal Payments
Increase in deferred tax liability
Defined Benefit Plan, Pension Remeasurement, Increase (Decrease) In Deferred Tax Liability, Due To Remeasurement, Amount
Defined Benefit Plan, Pension Remeasurement, Increase (Decrease) In Deferred Tax Liability, Due To Remeasurement, Amount
Antidilutive Security, Excluded EPS Calculation [Table]
Antidilutive Security, Excluded EPS Calculation [Table]
Dividends
Dividends
Total current liabilities
Liabilities, Current
Warranty
Business Combination, Recognized Liability Assumed, Warranty
Business Combination, Recognized Liability Assumed, Warranty
Individual:
Individual [Axis]
Other current assets
Other Assets, Current
Pension benefit transfer
Defined Benefit Plan, Pension Benefit Transfer, Amount
Defined Benefit Plan, Pension Benefit Transfer, Amount
Total cash used in investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Revenue, performance obligation, (in years)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
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]
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activity
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Effective tax rate (as a percent)
Effective Income Tax Rate Reconciliation, Percent
Entity Interactive Data Current
Entity Interactive Data Current
Acquisition related costs
Business Combination, Acquisition-Related Cost, Expense
Equity [Abstract]
Equity [Abstract]
Segment Information
Segment Reporting Disclosure [Text Block]
Movement in Extended Product Warranty Accrual [Roll Forward]
Movement in Extended Product Warranty Accrual [Roll Forward]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Liabilities assumed
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract]
Other liabilities
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Increase in pension
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement
Selling, general and administrative expenses
Selling, general and administrative expenses
Selling, General and Administrative Expense
Deferred tax assets
Deferred Income Tax Assets, Net
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Cash paid for fixed assets
Payments to Acquire Productive Assets
Depreciation and amortization expense
Depreciation, Depletion and Amortization
Other assets
Other Assets, Noncurrent
Movement in Standard Product Warranty Accrual [Roll Forward]
Movement in Standard Product Warranty Accrual [Roll Forward]
Entity Central Index Key
Entity Central Index Key
PEO Name
PEO Name
Schedule of Maturities of Long-term Debt
Schedule of Maturities of Long-Term Debt [Table Text Block]
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Revolving credit facility
Revolving Credit Facility [Member]
Arrangement Duration
Trading Arrangement Duration
Revolving credit facility
Business Combination, Recognized Liability Assumed, Credit Facility
Business Combination, Recognized Liability Assumed, Credit Facility
Net income since acquisition
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Deferred income
Contract with Customer, Liability, Current
2023 Term Loan
Term Loan Facility [Member]
Term Loan Facility [Member]
Segments [Axis]
Segments [Axis]
Work in process
Inventory, Work in Process, Net of Reserves
Pension plan settlement loss (Note 14)
Defined Benefit Pension Plan, Settlement Loss
Defined Benefit Pension Plan, Settlement Loss
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Local Phone Number
Local Phone Number
Plan assets
Defined Benefit Plan, Gross Assets
Defined Benefit Plan, Gross Assets
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Intangible assets
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill
Cash and cash equivalents
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent
Interest received
Interest Received, Excluding Capitalized Interest, Operating Activities
Interest Received, Excluding Capitalized Interest, Operating Activities
Assets
Assets [Abstract]
Long-term debt
Long-Term Debt, Excluding Current Maturities
Credit Facility [Axis]
Credit Facility [Axis]
Exchangeable Shares, Authorized
Exchangeable Shares, Authorized
Exchangeable Shares, Authorized
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Debt Instrument [Axis]
Debt Instrument [Axis]
Business Combination [Line Items]
Business Combination [Line Items]
Credit Facility [Domain]
Credit Facility [Domain]
Stockholders' equity
Equity, Attributable to Parent [Abstract]
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]
Current portion
Self Insurance Reserve, Current
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Share repurchases (Note 12)
Share repurchases (Note 12)
Treasury Stock, Value, Acquired, Cost Method
Accumulated Other Comprehensive Loss
Total AOCL
AOCI Attributable to Parent [Member]
Investment, Name [Axis]
Investment, Name [Axis]
Stated interest rate (as a percent)
Debt Instrument, Interest Rate, Stated Percentage
Tax reversal due to acquisition
Equity Investment In Affiliate, Tax Reversal Due To Acquisition
Equity Investment In Affiliate, Tax Reversal Due To Acquisition
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Voting Preferred Stock
Voting Preferred Stock [Member]
Voting Preferred Stock
Amortization of prior loss
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Guarantees, Commitments and Contingencies
Commitments Contingencies and Guarantees [Text Block]
Fair Value as of Grant Date
Award Grant Date Fair Value
Entity Registrant Name
Entity Registrant Name
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Net periodic pension benefit expense (income)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Asset Purchase Agreement
Asset Purchase Agreement [Member]
Asset Purchase Agreement
Schedule of Term Debt Instruments
Schedule of Long-Term Debt Instruments [Table Text Block]
Total adjustments
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity
Weighted-average dilutive securities
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Additions from Micro Bird acquisition (Note 13)
Standard Product Warranty Accrual, Increase For Acquisition
Standard Product Warranty Accrual, Increase For Acquisition
Document Quarterly Report
Document Quarterly Report
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Reversal due to acquisition
Equity Investment In Affiliate, Reversal Due To Acquisition
Equity Investment In Affiliate, Reversal Due To Acquisition
Percentage released on October 1, 2026
Exchangeable Common And Preferred Voting Stock, Period One Release, Percent
Exchangeable Common And Preferred Voting Stock, Period One Release, Percent
Number of Operating Segments
Number of Operating Segments
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Income Tax, Examination [Table]
Income Tax, Examination [Table]
Changes in accounts payable for capital additions to property, plant and equipment
Increase (Decrease) Capital Expenditures Incurred but Not Yet Paid
Increase (Decrease) Capital Expenditures Incurred but Not Yet Paid
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Interest cost
Defined Benefit Plan, Interest Cost
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Repurchase of common stock in connection with repurchase programs (Note 12)
Payments for Repurchase of Common Stock Under Repurchase Program
Payments for Repurchase of Common Stock Under Repurchase Program
Restatement Determination Date:
Restatement Determination Date [Axis]
Cash consideration transferred for the newly acquired interest
Payments to Acquire Businesses, Gross
Self-Insurance
Schedule of Self Insurance Reserve [Table Text Block]
Schedule of Self Insurance Reserve [Table Text Block]
Non-PEO NEO
Non-PEO NEO [Member]
Letters of credit, amount outstanding
Letters of Credit Outstanding, Amount
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Stock option activity
Stock Issued During Period, Value, Employee Stock Purchase Plan
Interest expense
Interest Expense, Debt
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Name
Trading Arrangement, Individual Name
Award Type [Domain]
Award Type [Domain]
Total accrued self-insurance
Self Insurance Reserve
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Accrued expenses
Business Combination, Recognized Liability Assumed, Accrued Expenses
Business Combination, Recognized Liability Assumed, Accrued Expenses
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Finance lease obligations
Business Combination, Recognized Liability Assumed, Lease Obligation
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Canada
CANADA
Compensation Amount
Outstanding Recovery Compensation Amount
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Deferred warranty income
Extended Product Warranty Accrual, Noncurrent
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Equity consideration transferred for the newly acquired interest
Business Combination, Consideration Transferred, Equity Interest
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Share-based compensation expense
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
In-process research & development
In Process Research and Development [Member]
Accumulated other comprehensive loss (Note 10)
Accumulated Other Comprehensive Income (Loss), Net of Tax
2027
Long-Term Debt, Maturity, Year One
Segments [Domain]
Segments [Domain]
Remaining borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Senior Credit Facility
Senior Credit Facility [Member]
Senior Credit Facility [Member]
Warranty
Standard Product Warranty Accrual, Current
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Inventories
Increase (Decrease) in Inventories
Previous equity interest in acquiree (as a percent)
Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage
Acquisition of business
Effective Income Tax Rate Reconciliation, Acquisition Of Business, Percent
Effective Income Tax Rate Reconciliation, Acquisition Of Business, Percent
Inventories
Total inventories
Inventory, Net
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Minimum
Minimum [Member]
Company Selected Measure Name
Company Selected Measure Name
Net income (1)
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax
Senior Term Loan
Senior Notes [Member]
Debt
Debt Disclosure [Text Block]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Accounts payable
Accounts Payable, Current
Current period accruals
Standard Product Warranty Accrual, Increase for Warranties Issued
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Pension settlement plan loss
Business Combination, Pro Forma Information, Pro Forma Income (Loss), Non-Cash After-Tax Pension Plan Settlement Loss
Business Combination, Pro Forma Information, Pro Forma Income (Loss), Non-Cash After-Tax Pension Plan Settlement Loss
Total liabilities assumed
Business Combination, Recognized Liability Assumed, Liability
Current period deferred income
Extended Product Warranty Accrual, Increase for Warranties Issued
All Executive Categories
All Executive Categories [Member]
Amortization of deferred actuarial pension losses
Defined Benefit Plan, Amortization of Deferred Gains (Losses)
Defined Benefit Plan, Amortization of Deferred Gains (Losses)
Finished goods
Inventory, Finished Goods, Net of Reserves
Finance lease right-of-use assets
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
Settlement loss included in earnings
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax
Diluted weighted average shares outstanding
Weighted-average shares and dilutive potential common shares
Weighted Average Number of Shares Outstanding, Diluted
Guarantees, commitments and contingencies (Note 6)
Commitments and Contingencies
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Business Combination [Axis]
Business Combination [Axis]
Entity Small Business
Entity Small Business
Voting interests acquired
Business Combination, Voting Equity Interest Acquired, Percentage
Revenue from External Customers by Geographic Areas
Revenue from External Customers by Geographic Areas [Table Text Block]
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Preferred Stock, Shares Outstanding
Preferred Stock, Shares Outstanding
Document Transition Report
Document Transition Report
Equity interest in equity method investment (as a percent)
Equity Method Investment, Ownership Percentage
Preferred stock, $0.0001 par value, 10,000,000 shares authorized, 0 shares issued and outstanding at June 27, 2026 and September 27, 2025
Preferred Stock, Value, Outstanding
Underlying Securities
Award Underlying Securities Amount
Current period reductions of accrual
Standard Product Warranty Accrual, Period Increase (Decrease)
Equity Component [Domain]
Equity Component [Domain]
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Revolving credit facility
Long-Term Line of Credit, Noncurrent
Income Taxes
Income Tax Disclosure [Text Block]
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Deferred tax liabilities
Business Combination, Recognized Liability Assumed, Deferred Tax Liability
Beginning Balance
Ending Balance
Equity, Including Portion Attributable to Noncontrolling Interest
Document Type
Document Type
Carrying value of investment
Equity Method Investments, Fair Value Disclosure
Earnings Per Share
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
Net change in defined benefit pension plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Additional paid-in capital
Additional Paid in Capital
Product and Service [Axis]
Product and Service [Axis]
Pension Expense
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Asset Acquisition [Domain]
Asset Acquisition [Domain]
Net sales
Shipping and handling revenues
Revenue from Contract with Customer, Excluding Assessed Tax
All Individuals
All Individuals [Member]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Consideration transferred
Asset Acquisition, Consideration Transferred
Name
Forgone Recovery, Individual Name
Total current assets
Assets, Current
Estimated Fair Value (in thousands of dollars)
Finite-Lived Intangible Assets Acquired
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Authorized amount
Share Repurchase Program, Authorized, Amount
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Contingent consideration
Asset Acquisition, Consideration Transferred, Contingent Consideration
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Other comprehensive income, gross
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Current liabilities
Liabilities, Current [Abstract]
Geographical [Axis]
Geographical [Axis]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Long-term line of credit
Long-Term Line of Credit
Beginning Balance (in shares)
Ending Balance (in shares)
Shares, Outstanding
Loss on disposal of fixed assets
Gain (Loss) on Disposition of Assets
Revenues
Business Combination, Pro Forma Information, Pro Forma Revenue
Accounts payable
Business Combination, Recognized Liability Assumed, Accounts Payable, Current
Accrued expenses, pension and other liabilities
Increase (Decrease) in Accrued Liabilities
Diluted earnings per share (in dollars per share)
Earnings Per Share, Diluted
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss, Current
Title of 12(b) Security
Title of 12(b) Security
Exchangeable Shares, Outstanding
Exchangeable Shares, Outstanding
Exchangeable Shares, Outstanding
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Extended product warranty, period
Extended Product Warranty, Period
Extended Product Warranty, Period
Long-term Debt, Fiscal Year Maturity
Long-Term Debt, Fiscal Year Maturity [Abstract]
Non-cash interest expense
Paid-in-Kind Interest
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidation Items [Domain]
Consolidation Items [Domain]
Joint Ventures
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Gross profit
Gross profit
Segment gross profit
Gross Profit
Share repurchases (Note 13) (in shares)
Share repurchases (Note 13) (in shares)
Treasury Stock, Shares, Acquired
Income tax paid, net of tax refunds
Income Taxes Paid, Net
Award Timing Disclosures [Line Items]
Inventories
Schedule of Inventory, Current [Table Text Block]
Total debt
Long-Term Debt, Gross
Remeasurement gain
Remeasurement gain
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain
Projected sales volume (in units sold)
Asset Acquisition, Projected Sales Volume
Asset Acquisition, Projected Sales Volume
Number of Micro stock for each share of Blue Bird converted
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share
Stockholders' Equity
Equity [Text Block]
Net income
Net income
Net income
Net Income (Loss) Attributable to Parent
Subsequent Event [Table]
Subsequent Event [Table]
Intersegment Eliminations
Intersegment Eliminations [Member]
Expiration Date
Trading Arrangement Expiration Date
Long-term liabilities
Liabilities, Noncurrent [Abstract]
Property, plant and equipment, net
Property, Plant and Equipment, Net
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Preferred Stock, Shares Authorized
Preferred Stock, Shares Authorized
Repurchase of common stock in connection with stock award exercises
Payments for Repurchase of Common Stock
Adoption Date
Trading Arrangement Adoption Date
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Entity Current Reporting Status
Entity Current Reporting Status
Product Warranty Liability [Line Items]
Product Warranty Liability [Line Items]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Customer relationships
Customer Relationships [Member]
Operating profit
Operating Income (Loss)
Line of Credit
Line of Credit [Member]
Long-term portion
Self Insurance Reserve, Noncurrent
Other comprehensive income, net of tax
Other Comprehensive Income (Loss), Including Hedging Adjustment, Net Of Tax
Other Comprehensive Income (Loss), Including Hedging Adjustment, Net Of Tax
Retained earnings
Retained Earnings (Accumulated Deficit)
Statement of Financial Position [Abstract]
Statement of Financial Position [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]
Executive Category:
Executive Category [Axis]
Additions from Micro Bird acquisition (Note 13)
Extended Product Warranty Accrual, Increase For Acquisition
Extended Product Warranty Accrual, Increase For Acquisition
Percentage released on April 1, 2028
Exchangeable Common And Preferred Voting Stock, Period Two Release, Percent
Exchangeable Common And Preferred Voting Stock, Period Two Release, Percent
Repayment of Micro Bird debt (Note 4)
Repayments of debt
Repayments of Debt
Product Warranty Liability [Table]
Product Warranty Liability [Table]
Term loan repayments
Repayments of Medium-Term Note
Finance lease obligations
Finance Lease, Liability, Current
Interest expense
Interest Expense, Operating and Nonoperating
Current Fiscal Year End Date
Current Fiscal Year End Date
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Deferred warranty income
Business Combination, Recognized Liability Assumed, Deferred Warranty Income
Business Combination, Recognized Liability Assumed, Deferred Warranty Income
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Other current liabilities
Business Combination, Recognized Liability Assumed, Other Liability, Current
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Assembled workforce
Non-GAAP, Assembled Workforce, Value
Non-GAAP, Assembled Workforce, Value
Number of participants transferred
Defined Benefit Pension Plan, Number Of Participants Transferred
Defined Benefit Pension Plan, Number Of Participants Transferred
Statement [Table]
Statement [Table]
Other income (expense), net (Notes 13 and 14)
Other Nonoperating Income (Expense)
Schedule of Purchase Consideration
Business Combination [Table Text Block]
Deferred income tax expense (benefit)
Deferred Income Tax Expense (Benefit)
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Cash flows from financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Amortization of prior loss, recognized in other comprehensive income
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax
Total consideration transferred
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill
Finance lease obligations
Finance Lease, Liability, Noncurrent
Acquisitions (Notes 12 and 13)
Stock Issued During Period, Value, Acquisitions
Fair value of net assets acquired
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)
Monthly settlement payment
Defined Benefit Plan, Benefit Obligation, Monthly Settlement Payment, Amount
Defined Benefit Plan, Benefit Obligation, Monthly Settlement Payment, Amount
Anti-dilutive securities excluded from computation of earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Amendment Flag
Amendment Flag
2028
Long-Term Debt, Maturity, Year Two
Current period recognition of income
Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties
Termination Date
Trading Arrangement Termination Date
Total cash used in financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
Raw materials
Inventory, Raw Materials, Net of Reserves
Revenue since acquisition
Business Combination, Acquiree's Revenue since Acquisition Date, Actual
Total recognized in net periodic pension benefit expense (income) and other comprehensive income
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax
Restricted stock activity
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures
Basic weighted average shares outstanding
Weighted-average shares outstanding (1)
Weighted Average Number of Shares Outstanding, Basic
Remaining authorized repurchase amount
Share Repurchase Program, Remaining Authorized, Amount
Shipping and handling cost of goods sold
Cost of Product and Service Sold
Decrease in other comprehensive loss
Defined Benefit Plan, Pension Remeasurement, Increase (Decrease) In Other Comprehensive Income (Loss), Due To Remeasurement, Amount
Defined Benefit Plan, Pension Remeasurement, Increase (Decrease) In Other Comprehensive Income (Loss), Due To Remeasurement, Amount
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Micro Bird Holdings Inc.
Micro Bird Holdings Inc. [Member]
Micro Bird Holdings Inc. [Member]
Subsequent Events [Abstract]
Subsequent Events [Abstract]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Cost of goods sold
Cost of Revenue
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Entity Tax Identification Number
Entity Tax Identification Number
Clean Bus Solutions (CBS)
Clean Bus Solutions [Member]
Clean Bus Solutions
Senior Revolving Credit Facility
Senior Revolving Credit Facility [Member]
Senior Revolving Credit Facility [Member]
Asset Acquisition [Axis]
Asset Acquisition [Axis]
Amounts reclassified and included in earnings
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Deferred financing costs
Debt Instrument, Unamortized Discount
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Common Stock, Par Value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common Stock, Shares, Issued
Common Stock, Shares, Issued
Shipping and Handling
Shipping and Handling [Member]
Use of Estimates and Assumptions
Use of Estimates, Policy [Policy Text Block]
Income taxes
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Trading Arrangement:
Trading Arrangement [Axis]
Total Shareholder Return Amount
Total Shareholder Return Amount
Subsequent Events
Subsequent Events [Text Block]
Net foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Insider Trading Arrangements [Line Items]
Security Exchange Name
Security Exchange Name
Other
Product and Service, Other [Member]
2026
Long-Term Debt, Maturity, Remainder of Fiscal Year
Total long-term liabilities
Liabilities, Noncurrent
Common stock, $0.0001 par value, 100,000,000 shares authorized, 31,676,039 and 31,884,721 shares issued and outstanding at June 27, 2026 and September 27, 2025, respectively
Common Stock, Value, Outstanding
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Operating expenses
Operating Expenses [Abstract]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Other current liabilities
Other Liabilities, Current
Fair value of the previously held interest
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Fair Value
Long-term debt
Business Combination, Recognized Liability Assumed, Long-Term Debt, Noncurrent
Statement [Line Items]
Statement [Line Items]
Accrued expenses
Accrued Liabilities, Excluding Product Warranty Accrual Current
Accrued Liabilities, Excluding Product Warranty Accrual Current
Consolidation Items [Axis]
Consolidation Items [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Cash and cash equivalents
Cash and Cash Equivalent
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Common Stock
Common Stock [Member]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
Exchangeable Common Stock
Exchangeable Common Stock [Member]
Exchangeable Common Stock
Finance lease right-of-use assets
Business Combination, Recognized Asset Acquired, Finance Lease Right-Of-Use Assets
Business Combination, Recognized Asset Acquired, Finance Lease Right-Of-Use Assets
Change in cash and cash equivalents
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation