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Common Stock, Value, Issued Shares redeemed (in shares) Temporary Equity, Shares Redeemed Temporary Equity, Shares Redeemed 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Domestic state and local taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Purchased services and other Airline, Capacity Purchase Arrangement Expense Other Other assets Other Assets, Miscellaneous, Noncurrent Retirement and Other Benefit Plans Retirement Benefits [Text Block] Restatement Determination Date Restatement Determination Date Tax jurisdiction of domicile Tax Jurisdiction of Domicile [Extensible Enumeration] Changes in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Estimated effective tax rate applicable to state net operating losses Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Percent Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Aggregate consideration Proceeds from Divestiture of Businesses Deferred Benefit Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract] Total Current (Benefit) Expense Current Income Tax Expense (Benefit) Spare parts and supplies, net Airline carrying value Airline Related Inventory, Net Amendment Flag Amendment Flag Income Tax Disclosure [Table] Income Tax Disclosure [Table] Income Tax Disclosure [Table] Current Liabilities Liabilities, Current [Abstract] Common stock converted (in shares) Conversion of Stock, Shares Converted Schedule of Property and Equipment Useful lives Property Plan And Equipment Estimated Useful Lives [Table Text Block] Property Plan And Equipment Estimated Useful Lives Table [Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding New York State NEW YORK Due from broker Due from Correspondent Brokers Disposal Group Classification [Axis] Disposal Group Classification [Axis] Interest and Dividend Income Investment Income, Interest And Dividend [Policy Text Block] Investment Income, Interest And Dividend Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Other industry related receivables Other Industry Related Receivables, Current Other Industry Related Receivables, Current Percentage Effective Income Tax Rate Reconciliation, Percent [Abstract] Reclassification [Table] Reclassification [Table] Gain on disposal of fixed assets Gain on disposal of fixed assets Gain (Loss) on Disposition of Other Assets Equity securities, current and restricted investments Equity Securities, FV-NI, Current and Restricted Investments, Noncurrent Equity Securities, FV-NI, Current and Restricted Investments, Noncurrent Other Deferred Tax Liabilities, Other Leases [Abstract] Leases [Abstract] Number of aircraft operated Airline, Aircraft Operated, Number American Capacity Purchase Agreement American Capacity Purchase Agreement [Member] American capacity purchase agreement. Total Long-Term Liabilities Liabilities, Noncurrent Related-Party Transactions Related Party Transactions Disclosure [Text Block] On-Demand Charter Service On-Demand Charter Service [Member] On-Demand Charter Service Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address State Or Province Entity Address, State or Province Series C Preferred Stock Series C Preferred Stock [Member] Number of stockholders filing an action Loss Contingency, Number of Plaintiffs Contract liability Deferred Tax Asset Deferred Contract Liabilities Deferred tax asset deferred contract liabilities. 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South Carolina SOUTH CAROLINA Net Cash Provided by (Used in) Investing Activities Cash 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 at the beginning of the year Unrecognized tax benefits at the end of the year Unrecognized Tax Benefits Aggregate principal amount Debt Instrument, Face Amount 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Temporary equity, beginning balance (in shares) Temporary equity, ending balance (in shares) Series C Convertible Redeemable Preferred Stock, shares outstanding (in shares) Temporary Equity, Shares Outstanding Flight property and equipment Flight Property And Equipment Gross Flight Property And Equipment Gross Treasury stock Treasury Stock, Common, Value Number of purchase agreements Number Of Purchase Agreements Number Of Purchase Agreements Contract liabilities Increase Decrease in Contract Liabilities Increase decrease in contract liabilities. Workers compensation loss fund Workers Compensation Loss Fund, Noncurrent Workers Compensation Loss Fund, Noncurrent Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Federal Income Tax Paid, Federal, after Refund Received Purchase of marketable securities Payments to Acquire Marketable Securities Entity Shell Company Entity Shell Company Adjustments related to the Supplemental Executive Savings Plan (SESP) Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Current portion of operating lease liability Operating Lease, Liability, Current Share repurchase minimum threshold Share Repurchase Value Minimum Threshold Exempt From Tax Share repurchase value minimum threshold exempt from tax. Less: Net gains (losses) recognized during the period on equity securities sold during the period Equity Securities, FV-NI and Restricted Investments, Noncurrent, Realized Gain (Loss) Equity Securities, FV-NI and Restricted Investments, Noncurrent, Realized Gain (Loss) Segment Reporting Segment Reporting, Policy [Policy Text Block] Minimum Crew Availability Minimum Crew Availability [Member] Minimum Crew Availability Schedule of Original Cost of Company's Fixed Assets and Accumulated Depreciation Property, Plant, and Equipment [Table Text Block] Net investment in sales lease Total sales lease receivable Sales-Type Lease, Net Investment in Lease, before Allowance for Credit Loss Pennsylvania PENNSYLVANIA Income (Loss) Per Share and Equity Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Sale of marketable securities Proceeds from Sale and Maturity of Marketable Securities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] State Deferred State and Local Income Tax Expense (Benefit) Document Fiscal Period Focus Document Fiscal Period Focus Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Extinguishment of Debt [Line Items] Extinguishment of Debt [Line Items] Trade names and air carrier certificate Intangible Asset, Excluding Goodwill, Indefinite-Lived Additions to property and equipment Payments to Acquire Property, Plant, and Equipment Unrecognized tax benefits Unrecognized Tax Benefits [Roll Forward] 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Total expected cash flows Sales-Type and Direct Financing Leases, Payment to be Received Income taxes payable Accrued Income Taxes, Current Interest income Sales-Type Lease, Interest Income Receivable Sales-Type Lease, Interest Income Receivable Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Aviation Disposition Aviation Disposition [Member] Aviation Disposition Other accrued expenses Increase (Decrease) in Other Accrued Liabilities Changes in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Depreciation, amortization and obsolescence Depreciation, Depletion and Amortization, Nonproduction Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Series C preferred stock conversion (in shares) Temporary Equity, Preferred Stock Conversion, Shares Temporary Equity, Preferred Stock Conversion, Shares Capital loss carryover Deferred Tax Assets, Capital Loss Carryforwards Interest and dividend income Investment Income, Interest and Dividend Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Shares used in calculating diluted loss per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Contract services and other Contract Service and Other Member Contract Service and Other [Member] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Depreciable Life (in years) Property, Plant, and Equipment, Useful Life Related Party Transaction [Line Items] Related Party Transaction [Line Items] Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Deferred Tax Assets, Other Tax Year 2021 And 2022 Tax Year 2021 And 2022 [Member] Tax Year 2021 And 2022 Deferred income taxes Deferred Income Taxes and Tax Credits Net operating losses Operating Loss Carryforwards Rebates payable Rebates Payable Rebates Payable Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Increase (decrease) in income taxes resulting from: Increase (Decrease) In Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Increase (Decrease) In Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount Long-term restricted investments - mutual funds Restricted Long-Term Investments, Mutual Funds [Member] Restricted Long-Term Investments, Mutual Funds Types Of Commercial Aircraft [Line Items] Types Of Commercial Aircraft [Line Items] Types Of Commercial Aircraft Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Deferred Tax Liabilities Deferred Tax Liabilities, Net [Abstract] Term of sales type lease (in months) Lessor, Sales-type Lease, Term of Contract Cash payments included in the measurement of lease liabilities related to operating leases Operating Lease, Payments Long-term restricted investments Restricted Investments, Noncurrent Award Timing Predetermined Award Timing Predetermined [Flag] Restricted cash Restricted Cash, Current Federal Deferred Federal Income Tax Expense (Benefit) Repurchased Stock Treasury Stock, Common [Member] Accrued payment of interest and penalties Income Tax Examination, Penalties and Interest Accrued Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Airline inventory allowance Airline Related Inventory, Valuation Reserves Benefit for income taxes Effective Income Tax Rate Reconciliation, Percent Beginning balance, non-current Ending balance, non-current Contract with Customer, Liability (Asset), Net, Noncurrent Contract with Customer, Liability (Asset), Net, Noncurrent Aircraft [Domain] Aircraft [Domain] Total lease payments Operating lease obligations Lessee, Operating Lease, Liability, to be Paid Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Wisconsin WISCONSIN Reclassification [Line Items] Reclassification [Line Items] Penalties and interest expense Income Tax Examination, Penalties and Interest Expense All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Mezzanine Equity - Series C Convertible Redeemable Preferred Stock Series C Redeemable Convertible Preferred Stock [Member] Series C Redeemable Convertible Preferred Stock Member Depreciation expense Depreciation Insurance and warranty claim receivables Insurance And Warranty Claim Receivables, Current Insurance And Warranty Claim Receivables, Current Fixed Daily Revenue Fixed Daily Revenue [Member] Fixed Daily Revenue [Member] Operating lease right-of-use asset Operating Lease, Right-of-Use Asset Revenues recognized included in opening contract balance, non-current Contract with Customer, Liability, Revenue Recognized, Noncurrent Contract with Customer, Liability, Revenue Recognized, Noncurrent Concentration Risk Type [Domain] Concentration Risk Type [Domain] Toft V. Harbor Diversified, Inc. Toft V. Harbor Diversified, Inc. [Member] Toft V. Harbor Diversified, Inc. 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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] Payroll and related costs Professional and Contracted Services Expense Accruals and reserves not currently deductible Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves Period of airline services provided Airline Services Provided, Period Airline Services Provided, Period Property and Equipment Property, Plant, and Equipment [Policy Text Block] Trade receivables Accounts Receivable, after Allowance for Credit Loss Accumulated Depreciation/ Amortization Property, Plant, And Equipment, Before Accumulated Depreciation, Depletion, And Amortization, Excluding Construction In Progress Property, Plant, And Equipment, Before Accumulated Depreciation, Depletion, And Amortization, Excluding Construction In Progress Interest and penalties in year-end balance Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Valuation allowance - capital deferred tax assets Deferred Tax Assets, Valuation Allowance, Capital Deferred Tax Assets, Valuation Allowance, Capital Long-term Promissory Note Debt Disclosure [Text Block] Right-of-use asset Deferred Tax Liabilities Operating Lease Right Of Use Of Asset Deferred tax liabilities operating lease right of use of asset. 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Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total Lease Liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Allowance for accounts receivables Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Proceeds from tax refunds Proceeds from Income Tax Refunds Number of collective bargaining agreements Multiemployer Plans, Collective-Bargaining Arrangement, Number Of Units, Additional Separate Arrangements Multiemployer Plans, Collective-Bargaining Arrangement, Number Of Units, Additional Separate Arrangements Total Deferred Benefit Deferred Income Tax Expense (Benefit) Number of aircraft removed from service Number Of Aircraft Removed From Service Number Of Aircraft Removed From Service Impairment of Long-Lived Assets and Indefinite-Lived Intangible Assets Long-Lived Asset, Including Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block] Letter of Credit Letter of Credit [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Deferred compensation liability (SESP) Deferred Compensation Liability, Current Capitalized contract cost, net Capitalized Contract Cost, Net, Noncurrent Auditor Location Auditor Location Central Index Key Entity Central Index Key Less accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Name of Property [Domain] Name of Property [Domain] Philadelphia Philadelphia [Member] Philadelphia 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] Income Taxes Income Tax, Policy [Policy Text Block] Net Cash (Used in) Provided by Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Amount paid Payments for Legal Settlements Computed benefit for income taxes at the statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Accounts Receivable Accounts Receivable [Member] Liabilities Disposal Group, Including Discontinued Operation, Liabilities Income Statement [Abstract] Income Statement [Abstract] Stockholders’ Equity Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Total sales lease receivable, net Total sales lease receivable, net Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss Deferred Tax Assets Deferred Tax Assets, Net [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Operating Expenses Operating Expenses [Abstract] Long-term deferred tax asset Deferred Income Tax Assets, Net Schedule of Income Tax (Benefit) Provision Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Deferred revenue current Deferred Revenue, Current City Area Code City Area Code Income Tax Examination [Line Items] Income Tax Examination [Line Items] All Individuals All Individuals [Member] Ground equipment Ground Equipment [Member] Ground Equipment Member. Subsequent Events Subsequent Events [Text Block] Dividends paid on preferred stock Payments of Dividends Sales lease receivable Increase (Decrease) in Leasing Receivables Unrealized loss on investments Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss Name Forgone Recovery, Individual Name Long term investments Long Term Investments, Fair Value Disclosure Long Term Investments, Fair Value Disclosure Previously Reported Previously Reported [Member] Accrued interest, statement of financial position not disclosed Sales-Type Lease, Net Investment In Lease, Accrued Interest, After Allowance For Credit Loss, Statement Of Financial Position, Extensible List Not Disclosed Flag Sales-Type Lease, Net Investment In Lease, Accrued Interest, After Allowance For Credit Loss, Statement Of Financial Position, Extensible List Not Disclosed Flag Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Intangible Assets Intangible Asset [Text Block] Statement [Line Items] Statement [Line Items] Total Assets Assets Entity [Domain] Entity [Domain] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Aircraft sold, number Aircraft Sold, Number Series C preferred stock redemption (in shares) Temporary Equity, Preferred Stock Redemption, Shares Temporary Equity, Preferred Stock Redemption, Shares Dispatchers Dispatchers [Member] Dispatchers. Interest expense Interest Expense, Nonoperating Number of jets owned Number Of Jets Owned Number Of Jets Owned Net Deferred Income Tax Assets (Liabilities) Deferred Tax Liabilities, Net PEO PEO [Member] Accrued bonuses Deferred Compensation Arrangement with Individual, Recorded Liability Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Stock Repurchase Program Stock Repurchase Program [Text Block] Stock repurchase program . Automatic increase per calendar month Stock Repurchase Program, Automatic Increase Per Calendar Month To Authorized Amount Stock Repurchase Program, Automatic Increase Per Calendar Month To Authorized Amount Other Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investing activities Additional Cash Flow Elements, Investing Activity [Abstract] Number of aircrafts in sales-type lease Sales-Type Lease, Number Of Aircrafts Sales-Type Lease, Number Of Aircrafts Changes in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Deferred revenue recognized Contract with Customer, Liability, Revenue Recognized Gain on marketable securities Equity Securities, FV-NI, Gain (Loss) Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accrued interest Sales-Type Lease, Net Investment in Lease, Accrued Interest, after Allowance for Credit Loss Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Retained Deficit Retained Earnings [Member] Long-term operating lease liability Operating Lease, Liability, Noncurrent Redemption value Temporary Equity, Redemption Value Temporary Equity, Redemption Value Revision of Prior Period [Domain] Revision of Prior Period [Domain] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Gain (loss) on marketable securities and long-term restricted investments Marketable Security, Gain (Loss) And Restricted Investments, Noncurrent Marketable Security, Gain (Loss) And Restricted Investments, Noncurrent Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common stock, beginning balance (in shares) Common stock, ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted income (loss) share (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net Cash Used in Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Agreement [Axis] Agreement [Axis] Agreement. 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Financial Instruments [Domain] Financial Instruments [Domain] Allowance for expected credit losses Financing Receivable, Allowance for Credit Loss Sales-type Lease Lessor, Sales-type Leases [Text Block] Stock Repurchase Program Stock Repurchase Program [Member] Stock Repurchase Program Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Total Intangible Asset, Excluding Goodwill, before Accumulated Amortization Prepaid expenses and other Increase (Decrease) in Prepaid Expenses, Other Prepaid expenses and other Prepaid Expense, Current Total cash Cash Less: valuation allowance: Deferred Tax Assets, Valuation Allowance [Abstract] Deferred Tax Assets, Valuation Allowance State Income Tax Jurisdiction, Domestic State and Local [Member] Multiemployer Plan [Table] Multiemployer Plan [Table] Construction in Progress Construction in Progress [Member] Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Extractive Industries [Abstract] Extractive Industries [Abstract] Domestic state and local taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Aircraft maintenance, materials and repairs Airline, Maintenance and Repair Expenses Related Party Transaction [Table] Related Party Transaction [Table] Schedule of Component of Lease Cost Lease, Cost [Table Text Block] Marketable Securities and Long-term Restricted Investments (SESP) Marketable Securities, Policy [Policy Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Auditor Firm ID Auditor Firm ID Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Office equipment Office Equipment [Member] Amounts received, excluding amounts recognized as revenue, current Contract with Customer, Liability, Excluding Revenue Recognized, Current Contract with Customer, Liability, Excluding Revenue Recognized, Current Loss From Operations Operating Income (Loss) Service Service [Member] Current Fiscal Year End Date Current Fiscal Year End Date Interest receivable - 2022 federal tax refund Interest Receivable, Noncurrent Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Tax Year 2021 Tax Year 2021 [Member] Dividend income Investment Income, Dividend Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Net gains recognized during the period on equity securities Equity Securities, FV-NI and Restricted Investments, Noncurrent, Unrealized Gain (Loss) Equity Securities, FV-NI and Restricted Investments, Noncurrent, Unrealized Gain (Loss) Repurchased stock (in shares) Stock Repurchased During Period, Shares Preferred stock dividends Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings 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] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Income Tax, Examination [Table] Income Tax, Examination [Table] Ground property and equipment Machinery and Equipment, Gross Description of Operations Description Of Operations [Policy Text Block] Description Of Operations Policy Text Block. 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Gain on marketable securities, Short-term restricted investments (SESP), and Long-term restricted investments (SESP) Gain (Loss) On Marketable Securities, Short-Term Restricted Investments And Long-Term Restricted Investments Gain (Loss) On Marketable Securities, Short-Term Restricted Investments And Long-Term Restricted Investments Receivables, net Receivables, net Receivables, net Receivables, Net, Current Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] CRJ-200 CRJ-200 [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Net assets Disposal Group, Including Discontinued Operation, Net Assets Disposal Group, Including Discontinued Operation, Net Assets Class of Stock [Domain] Class of Stock [Domain] Schedule of Undiscounted Cash Flows Over Expected Term of Sales-Type Lease Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash payments for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Inventory allowance Inventory Adjustments Name Measure Name Illinois ILLINOIS Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Trade receivables Trade Receivables, Current Trade Receivables, Current Long-term promissory note Promissory Notes Payable Non Current Promissory Notes Payable Non Current AWAC Aviation Inc AWAC Aviation Inc [Member] AWAC Aviation Inc. 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[Text Block] Schedule of Calculations of Net Income (Loss) Per Common Share Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] Revision of Prior Period [Axis] Revision of Prior Period [Axis] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Spare engines Spare Engines [Member] Spare Engines [Member] Supplemental Executive Savings Plan (“SESP”) Compensation Related Costs, Policy [Policy Text Block] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Tax Period [Domain] Tax Period [Domain] Expected federal and state refunds Income Taxes Receivable Depreciation, amortization and obsolescence allowance Depreciation, Depletion and Amortization Types of Commercial Aircraft [Table] Types of Commercial Aircraft [Table] Cost of Repurchased Stock Repurchased Stock [Member] Repurchased Stock Annual recurring fee payable monthly Annual Recurring Fee Payable Monthly Pursuant To Service Agreement Annual recurring fee payable monthly pursuant to service agreement. Entity Address Address Line2 Entity Address, Address Line Two Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Spare parts and supplies carrying value Spare Parts And Supplies, Net Carrying Value Spare Parts And Supplies, Net Carrying Value Current Assets Assets, Current [Abstract] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] City of Milwaukee, Wisconsin variable rate Industrial Development Bonds Senior Notes [Member] Schedule of Operating Lease Related Terms and Discount Rates Schedule of Weighted Average Lease Terms and Discount Rate [Table Text Block] Schedule of Weighted Average Lease Terms and Discount Rate [Table Text Block] Entity Address Address Line1 Entity Address, Address Line One Operating lease right-of-use asset obtained Right of use assets acquired under operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income Tax Benefit Income Tax Benefit Income Tax Expense (Benefit) Beginning balance, current Ending balance, current Contract with Customer, Liability (Asset), Net, Current Contract with Customer, Liability (Asset), Net, Current Schedule of Multiemployer Plans Multiemployer Plan [Table Text Block] Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Deferred revenues Deferred Tax Assets, Deferred Income Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Decrease in Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Total Deferred Tax Assets Deferred Tax Assets, Net of Valuation Allowance Subtotal before valuation allowance Deferred Tax Assets, Gross Mechanics Mechanics [Member] Mechanics. 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