Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Flight property and equipment Flight Property And Equipment Gross Flight Property And Equipment Gross Statistical Measurement [Domain] Statistical Measurement [Domain] Amounts received, excluding amounts recognized as revenue, current Contract with Customer, Liability, Excluding Revenue Recognized, Current Contract with Customer, Liability, Excluding Revenue Recognized, Current Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Annual recurring fee payable monthly Annual Recurring Fee Payable Monthly Pursuant To Service Agreement Annual recurring fee payable monthly pursuant to service agreement. Revenue related to one-time assistance payment, estimated monthly support fee and heavy maintenance revenues Revenue From Heavy Maintenance Services And Support Fee Recognized Revenue from heavy maintenance services and support fee recognized. Insurance and warranty claim receivables Insurance And Warranty Claim Receivables, Current Insurance And Warranty Claim Receivables, Current Common Stock, $0.01 par value per share, 100,000,000 shares authorized, 71,981,140 shares issued at September 30, 2025 and December 31, 2024, 58,429,836 shares outstanding at September 30, 2025 and 58,493,761 shares outstanding at December 31, 2024 Common Stock, Value, Issued 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Other assets Other Assets, Miscellaneous, Noncurrent Purchased services and other Airline, Capacity Purchase Arrangement Expense Disposal group including discontinued operation consideration before adjustments and tax Disposal Group Including Discontinued Operation Consideration Before Adjustments And Tax Disposal Group Including Discontinued Operation Consideration Before Adjustments And Tax Restatement Determination Date Restatement Determination Date 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] Capacity Purchase Agreements with American Capacity Purchase Agreement [Text Block] Capacity Purchase Agreement [Text Block] Spare parts and supplies, net Airline Related Inventory, Net Amendment Flag Amendment Flag Current Liabilities Liabilities, Current [Abstract] Common stock converted (in shares) Conversion of Stock, Shares Converted Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Implicit rate Sales-Type Lease, Implicit Rate Sales-Type Lease, Implicit Rate Disposal Group Classification [Axis] Disposal Group Classification [Axis] Gain on disposal of fixed assets Gain on disposition of fixed assets Gain (Loss) on Disposition of Other Assets Number of purchase agreements Number Of Purchase Agreements Number Of Purchase Agreements Description of Operations Description Of Operations [Policy Text Block] Description Of Operations Policy Text Block. 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 Leases [Abstract] Leases [Abstract] Number of aircrafts operated Airline, Aircraft Operated, Number Total Long-Term Liabilities Liabilities, Noncurrent Related-Party Transactions Related Party Transactions Disclosure [Text Block] 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] PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Stock Repurchase Program [Abstract] Stock Repurchase Program [Abstract] Stock repurchase program. Long-Term Liabilities Liabilities, Noncurrent [Abstract] Intangibles Intangible Asset, Excluding Goodwill, after Accumulated Amortization Share Repurchase Program [Domain] Share Repurchase Program [Domain] Basic (in shares) Shares used in calculating basic loss per share (in shares) Weighted Average Number of Shares Outstanding, Basic Contract asset Contract with Customer, Asset, after Allowance for Credit Loss, Current Long-term investments Long-Term Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total Current Liabilities Liabilities, Current Trade receivables Trade Receivables, Current Trade Receivables, Current 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Operating lease rent expense Operating Leases Rent Expense Operating Leases Rent Expense Restricted short-term investments, mutual funds Restricted Short-Term Investments, Mutual Funds [Member] Restricted short-Term Investments, Mutual Funds Series C preferred stock conversion Temporary Equity, Preferred Stock Conversion, Amount Temporary Equity, Preferred Stock Conversion, Amount Extinguishment of Debt [Table] Extinguishment of Debt [Table] Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Concentration Risk [Table] Concentration Risk [Table] Total Operating Revenues Charter revenues Revenue from Contract with Customer, Including Assessed Tax Entity Address City Or Town Entity Address, City or Town Schedule of Cash and Cash Equivalents Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Toft V. Harbor Diversified, Inc. Toft V. Harbor Diversified, Inc. [Member] Toft V. Harbor Diversified, Inc. Interest and Dividend Income Investment Income, Interest And Dividend [Policy Text Block] Investment Income, Interest And Dividend Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net loss available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Operating lease right-of-use asset Increase (Decrease) In Operating Lease Right Of Use Asset Increase decrease in operating lease right of use asset. Aircraft Type [Axis] Aircraft Type [Axis] Long-term deposits Long-Term Deposits Long-Term Deposits Deferred compensation arrangement with individual, cash award granted, amount Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount Reclassification between current and non-current, current Contract with Customer, Liability, Reclassification Between Current And Non-Current, Current Contract with Customer, Liability, Reclassification Between Current And Non-Current, Current Level 2 Fair Value, Inputs, Level 2 [Member] Other Income (Expense) Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Revenue Benchmark Revenue Benchmark [Member] Redemption value Temporary Equity, Redemption Value Temporary Equity, Redemption Value Name of Property [Axis] Name of Property [Axis] Federal Tax Authority Federal Tax Authority [Member] Federal Tax Authority Dividends declared Dividends, Preferred Stock Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Beginning balance, current Ending balance, current Contract with Customer, Liability (Asset), Net, Current Contract with Customer, Liability (Asset), Net, Current Reclassification Revision of Prior Period, Reclassification, Adjustment [Member] Recently Adopted and Upcoming Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Gain on disposition of property and equipment Gain on disposition of property plant equipment Gain (Loss) on Disposition of Property Plant Equipment 2026 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Estimates and Assumptions Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Contract Revenues and Contract Assets and Liabilities Revenue from Contract with Customer [Policy Text Block] Rotable parts Rotable Parts [Member] Rotable Parts [Member] Share repurchase value minimum threshold exempt from tax Share Repurchase Value Minimum Threshold Exempt From Tax Share repurchase value minimum threshold exempt from tax. Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Income taxes payable Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Summary of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Issuance of stock (in shares) Temporary Equity Stock Issued During The Period Shares New Issues Temporary equity stock issued during the period shares new issues. 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] 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 Treasury stock Treasury Stock, Common, Value On-Demand Charter Service On-Demand Charter Service [Member] On-Demand Charter Service October 2025 through December 2025 Sales-Type and Direct Financing Leases, Payment to be Received, Remainder of Fiscal Year Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Plus: 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) Total Liabilities, Fair Value Disclosure Entity Shell Company Entity Shell Company Current portion of operating lease liability Operating Lease, Liability, Current Series C preferred stock redemption (in shares) Temporary Equity, Preferred Stock Redemption, Shares Temporary Equity, Preferred Stock Redemption, Shares Segment Reporting Segment Reporting, Policy [Policy Text Block] 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 Earnings Per Share and Equity Earnings Per Share [Text Block] Amortization of engine overhauls Amortization Of Engine Overhauls Amortization Of Engine Overhauls Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] 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] Number of aircraft removed from service Number Of Aircraft Removed From Service Number Of Aircraft Removed From Service Extinguishment of Debt [Line Items] Extinguishment of Debt [Line Items] Total Liabilities Liabilities Summary of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Trade names and air carrier certificate Intangible Asset, Excluding Goodwill, Indefinite-Lived Additions to property and equipment Payments to Acquire Property, Plant, and Equipment 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] Federal corporate excise tax repurchase percentage Federal Corporate Excise Tax Percentage Federal corporate excise tax percentage. Total expected cash flows Sales-Type and Direct Financing Leases, Payment to be Received Income taxes payable Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Restricted investments, mutual funds Restricted Long-Term Investments, Mutual Funds [Member] Restricted Long-Term Investments, Mutual Funds Concentration Risk [Line Items] Concentration Risk [Line Items] Other accrued expenses Increase (Decrease) in Other Accrued Liabilities 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] 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 Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] 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 Deferred income taxes Deferred Income Taxes and Tax Credits Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total Long-Term Assets Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment Excise tax liabilities incurred during the period and capitalized Excise Tax Liabilities Incurred During The Period And Capitalized Excise tax liabilities incurred during the period and capitalized. Contract Costs Capitalized Contract Costs, Policy [Policy Text Block] Capitalized Contract Costs, Policy 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 (SESP) Restricted Investments, Noncurrent Award Timing Predetermined Award Timing Predetermined [Flag] Restricted cash Restricted Cash, Current Treasury Stock Treasury Stock, Common [Member] 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] Amounts received, excluding amounts recognized as revenue, non-current Contract with Customer, Liability, Excluding Revenue Recognized, Noncurrent Contract with Customer, Liability, Excluding Revenue Recognized, Noncurrent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Aircraft [Domain] Aircraft [Domain] Total lease payments Lessee, Operating Lease, Liability, to be Paid Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Net gains recognized during the period on equity securities Equity Securities, FV-NI and Restricted Investments, Noncurrent, Gain (Loss) Equity Securities, FV-NI and Restricted Investments, Noncurrent, Gain (Loss) All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Depreciation expense Depreciation Sales lease receivable, net Sales Lease Receivable, Current Notes receivable current. Operating lease right-of-use asset Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Aviation Disposition Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Outstanding credit facility Long-Term Line of Credit Minimum Minimum [Member] Gain (loss) on marketable securities and long-term restricted investments Gain (Loss) On Marketable Securities And Long-term Restricted Investments Gain (Loss) On Marketable Securities And Long-term Restricted Investments Expiration Date Trading Arrangement Expiration Date Receivables, net Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss, Current American Capacity Purchase Agreement American Capacity Purchase Agreement [Member] American capacity purchase agreement. Total cash, cash equivalents, and restricted cash Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] 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] Cost of Treasury Stock Repurchased Stock [Member] Repurchased Stock Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Temporary equity, shares redeemed Temporary Equity, Shares Redeemed Temporary Equity, Shares Redeemed Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accrued payroll and employee benefits Accrued Employee Benefits, Current Exercise Price Award Exercise Price Cash Flows from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Remaining lease terms Lessee, Operating Lease, Remaining Lease Term Authorized amount of repurchase, up to Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report 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 Property, Plant and Equipment, Excluding Construction in Progress Property, Plant And Equipment, Excluding Construction In Progress [Member] Property, Plant And Equipment, Excluding Construction In Progress Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss Estimated remaining fees to be received from minimum crew availability Estimated Remaining Fees To Be Received From Minimum Crew Availability Estimated Remaining Fees To Be Received From Minimum Crew Availability Debt Debt Disclosure [Text Block] Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Disposal Group Classification [Domain] Disposal Group Classification [Domain] Beginning balance, non-current Ending balance, non-current Contract with Customer, Liability (Asset), Net, Noncurrent Contract with Customer, Liability (Asset), Net, Noncurrent Gain on Short-term and Long-term restricted investments (SESP) Marketable Security, Gain (Loss) Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Business Combination [Table] Business Combination [Table] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Total Operating Expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Consideration Disposal Group, Including Discontinued Operation, Consideration Counterparty Name [Domain] Counterparty Name [Domain] Total Stockholders’ Equity Beginning balance Ending balance Equity, Attributable to Parent Total Other Income Nonoperating Income (Expense) Marketable securities Equity Securities, FV-NI, Current Assets Assets [Abstract] 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] Total Lease Liabilities Operating Lease, Liability Other rents Other Rental Expenses Other Rental Expenses Insider Trading Policies and Procedures [Line Items] Contract revenues Contract Revenue Contract Revenue [Member] Contract Revenue [Member] Allowance for accounts receivables Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Other industry related receivables Other Industry Related Receivables, Current Other Industry Related Receivables, Current American Airlines American Airlines Inc [Member] American Airlines Inc [Member] 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] Short-term deferred compensation (SESP) Deferred Compensation Liability, Current Entity Central Index Key Entity Central Index Key Amortization expense related to fulfillment costs Amortization Of Fulfillment Costs Amortization of fulfillment costs. 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] 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 Mezzanine Equity Series C Convertible Redeemable Preferred Stock Series C Redeemable Convertible Preferred Stock [Member] Series C Redeemable Convertible Preferred Stock Member Accounts Receivable Accounts Receivable [Member] 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 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 Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Agreement [Axis] Agreement [Axis] Agreement. Operating Expenses (Income) Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Aviation Disposition Aviation Disposition [Member] Aviation Disposition Deferred revenue current Deferred Revenue, Current City Area Code City Area Code Short-term and Long-term deferred compensation (SESP) Deferred Compensation, Noncash, Noncurrent Deferred Compensation, Noncash, Noncurrent Income Tax Examination [Line Items] Income Tax Examination [Line Items] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Long-term investments Long Term Investments, Fair Value Disclosure Long Term Investments, Fair Value Disclosure Dividends paid on preferred stock Payments of Dividends Sales lease receivable Increase (Decrease) in Leasing Receivables Name Forgone Recovery, Individual Name Previously Reported Previously Reported [Member] 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 Series C preferred stock conversion (in shares) Temporary Equity, Preferred Stock Conversion, Shares Temporary Equity, Preferred Stock Conversion, Shares Entity [Domain] Entity [Domain] Aircraft sold, number Aircraft Sold, Number Interest expense Interest Expense, Nonoperating Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Contract Liabilities [Roll Forward] Contract Liabilities [Roll Forward] Contract Liabilities PEO PEO [Member] Number of outstanding letters of credit Number Of Outstanding Letter Of Credit Number Of Outstanding Letter Of Credit 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] Revenue received Contract with Customer, Liability, Revenue Recognized Gain on marketable securities Equity Securities, FV-NI, Gain (Loss) Subsequent Event Type [Domain] Subsequent Event Type [Domain] Sales-type lease, net investment in lease, accrued interest, after allowance for credit loss 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 Fair value of marketable securities and long-term restricted investments Equity Securities, FV-NI, Current and Restricted Investments, Noncurrent Equity Securities, FV-NI, Current and Restricted Investments, Noncurrent Revision of Prior Period [Domain] Revision of Prior Period [Domain] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] 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 Long-term promissory note Promissory Notes Payable Non Current Promissory Notes Payable Non Current Award Timing Disclosures [Line Items] Diluted Loss per 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 Accrued payroll and employee benefits Increase (Decrease) in Employee Related Liabilities Litigation Case [Domain] Litigation Case [Domain] Adjustments to reconcile (used in) provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Series C Preferred (in shares) Series C preferred (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock Long-term deferred compensation (SESP) Deferred Compensation Liability, Classified, Noncurrent Revenue from contract with customer, excluding assessed tax Revenue from Contract with Customer, Excluding Assessed Tax Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Purchase of marketable securities and long-term restricted investments (SESP) Payments to Acquire Marketable Securities and Long-Term Investments Payments to Acquire Marketable Securities and Long-Term Investments Net Property and Equipment Property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Interest and dividend income Other Interest and Dividend Income Schedule of Classification of Marketable Securities And Long Term Investments Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Financial Instruments [Domain] Financial Instruments [Domain] Reclassification between current and non-current, non-current Contract with Customer, Liability, Reclassification Between Current And Non-Current, Noncurrent Contract with Customer, Liability, Reclassification Between Current And Non-Current, Noncurrent Allowance for expected credit losses Financing Receivable, Allowance for Credit Loss Sales-type Lease Lessor, Sales-type Leases [Text Block] 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 Revenues recognized included in opening contract balance, non-current Contract with Customer, Liability, Revenue Recognized, Noncurrent Contract with Customer, Liability, Revenue Recognized, Noncurrent State Income Tax Jurisdiction, Domestic State and Local [Member] Construction in Progress Construction in Progress [Member] Weighted-average incremental borrowing rate Operating Lease, Weighted Average Discount Rate, Percent Extractive Industries [Abstract] Extractive Industries [Abstract] Aircraft maintenance, materials and repairs Airline, Maintenance and Repair Expenses Contract liabilities Increase (Decrease) In Contract Liabilities Increase decrease in contract liabilities. Thereafter Lessee, Operating Lease Liability, To Be Paid, After Year Four Lessee Operating Lease Liability to be Paid after Year Four. Related Party Transaction [Table] Related Party Transaction [Table] Variable lease costs Increase (Decrease) in Variable Lease Cost Increase (Decrease) in variable lease cost. Schedule of Components of Lease Costs Lease, Cost [Table Text Block] Marketable Securities, Short-term Restricted Investments (SESP) and Long-term Restricted Investments (SESP) Marketable Securities, Policy [Policy Text Block] Minimum Crew Availability Minimum Crew Availability [Member] Minimum Crew Availability Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Office equipment Office Equipment [Member] Loss from Operations Operating Income (Loss) Service Service [Member] Disposal group including discontinued operation consideration other sales Disposal Group Including Discontinued Operation Consideration Other Sales Disposal Group Including Discontinued Operation Consideration Other Sales Current Fiscal Year End Date Current Fiscal Year End Date 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] Dividend income Investment Income, Dividend Series C preferred stock redemption Temporary Equity, Preferred Stock Redemption, Amount Temporary Equity, Preferred Stock Redemption, Amount Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Contract services and other Contract Service And Other Member Contract Service and Other [Member] Number of CRJ-200 regional jets owned Number Of Jets Owned Number Of Jets Owned Ground equipment Ground Equipment [Member] Ground Equipment Member. Stock repurchased (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 Expected tax refunds Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Common stock, convertible, conversion price (in dollars per share) Common Stock, Convertible, Conversion Price, Decrease Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Dividends declared (in dollars per share) Preferred Stock, Dividends Per Share, Declared Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Short-Term Contract with Customer Short-Term Contract with Customer [Member] Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Common, Shares Equity Components [Axis] Equity Components [Axis] Deferred Bonus Deferred Bonus [Member] Receivables, net Increase (Decrease) in Accounts Receivable Related Party Related Party [Member] Stock Repurchase Program Stock Repurchase Program [Text Block] Stock repurchase program . Product and Service [Domain] Product and Service [Domain] Cash payments for income taxes Income Tax Paid, after Refund Received Class of Stock [Line Items] Class of Stock [Line Items] Non-refundable upfront fee revenues Nonrefundable Upfront Fee Revenues Non-refundable upfront fee revenues. Contract costs Capitalized Contract Cost, Net SESP contribution amount Supplemental Executive Savings Plan, Contribution Amount Supplemental Executive Savings Plan, Contribution Amount Entity Interactive Data Current Entity Interactive Data Current Deferred tax liability Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Subsequent Events [Abstract] Subsequent Events [Abstract] Long-term lease receivable, net Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss, Noncurrent Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other Other Assets, Noncurrent Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Schedule of Intangible Assets Intangible Asset, Indefinite-Lived [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Amount awarded Litigation Settlement, Amount Awarded from Other Party Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Allowance for sales lease receivable Less credit loss reserve Sales-type Lease, Net Investment in Lease, Allowance for Credit Loss Treasury Payroll and Support Programme Treasury Payroll And Support Programme [Member] Treasury Payroll And Support Programme [Member] Entity Address Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Fulfillment costs Fulfillment Costs Fulfillment Costs. 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Counterparty Name [Axis] Counterparty Name [Axis] Liabilities, Mezzanine Equity, and Stockholders’ Equity Liabilities and Equity [Abstract] Other Commitments [Table] Other Commitments [Table] Temporary equity, beginning balance Temporary equity, ending balance Temporary Equity, Carrying Amount, Attributable to Parent Scheme [Axis] Scheme [Axis] Scheme [Axis] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Interest income Sales-Type Lease, Interest Income Receivable Sales-Type Lease, Interest Income Receivable October 2025 through December 31, 2025 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Acquisition of property and equipment Acquisition of Property and Equipment, Noncash Activity Acquisition of Property and Equipment, Noncash Activity Level 3 Fair Value, Inputs, Level 3 [Member] Spare parts and supplies Increase (Decrease) in Materials and Supplies Operating activities Supplemental Cash Flow Information [Abstract] Rental payments Sales-type Lease, Revenue Number of additional engines sold Number Of Additional Engines Sold Number Of Additional Engines Sold Loss allocated to common stockholders per common share Basic And Earnings Per Share [Abstract] Basic and earnings per share. Treasury stock purchases (in shares) Treasury Stock, Shares, Acquired Stock Repurchase Program Stock Repurchase Program [Member] Stock Repurchase Program PEO Name PEO Name Scheme [Domain] Scheme [Domain] Scheme [Domain] Types of Commercial Aircraft [Line Items] Types Of Commercial Aircraft [Line Items] Types Of Commercial Aircraft Restricted cash Restricted Cash Leasehold improvements Leasehold Improvements [Member] Workers compensation loss fund Workers Compensation Loss Fund, Noncurrent Workers Compensation Loss Fund, Noncurrent Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Mutual funds Mutual Fund [Member] Other Commitments [Line Items] Other Commitments [Line Items] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Treasury stock purchases Treasury Stock, Value, Acquired, Cost Method Product Concentration Risk Product Concentration Risk [Member] Cash, Cash Equivalents and Restricted Cash, beginning of period Cash, Cash Equivalents and Restricted Cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accounts payable Increase (Decrease) in Accounts Payable Other accrued expenses Other Accrued Liabilities, Current Entity Incorporation State Country Code 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] Non-NEOs Non-NEOs [Member] 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] Revenue from crew availability minimums Revenue From Crew Availability Minimums Revenue From Crew Availability Minimums Subsequent Event [Table] Subsequent Event [Table] Total Lease Costs Lease, Cost Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Disposal Group Name [Axis] Disposal Group Name [Axis] Series C preferred stock conversion (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Lease Obligations Lessee, Operating Leases [Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic Loss per share (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Unrealized gains recognized during the period on equity securities held as of the end of the period Equity Securities, FV-NI and Restricted Investments, Noncurrent, Unrealized Gain (Loss) Equity Securities, FV-NI and Restricted Investments, Noncurrent, Unrealized Gain (Loss) Spare Parts and Supplies Inventory Supplies, Policy [Policy Text Block] Repurchased stock Payments for Repurchase of Common Stock Contract liabilities, net Contract with Customer, Liability, Current Total Current Assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Fixed Daily Revenue Fixed Daily Revenue [Member] Fixed Daily Revenue [Member] Award Type Award Type [Axis] Short-term lease costs Short-Term Lease, Cost Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Interest income from sales-type lease Sales-type Lease, Interest Income Retained deficit Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] AWAC Aviation Inc AWAC Aviation Inc [Member] AWAC Aviation Inc. Rebates payable Rebates Payable Rebates Payable 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] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Operating lease costs Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Hangar Hangar [Member] Hangar [Member] Proceeds from other long term debt Proceeds from Issuance of Other Long-Term Debt Concentration risk Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Total Liabilities and Stockholders’ Equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Agreement [Domain] Agreement [Domain] Agreement. Sales-type lease, net investment in lease, accrued interest, after allowance for credit loss Sales-type Lease, Net Investment in Lease, Allowance for Credit Loss, Period Increase (Decrease) Preferred stock dividends Preferred stock dividends Temporary Equity, Dividends, Adjustment Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Schedule of Receivables, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Schedule of Net Unrealized Gains and Losses That Relate To Marketable Securities Unrealized Gain (Loss) on Investments [Table Text Block] Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Other, net Other Nonoperating Income (Expense) Deferred revenue recognition Deferred Revenue Recognition Deferred Revenue Recognition Federal and state tax receivables Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name 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] Long-Term Assets Assets, Noncurrent [Abstract] Property and Equipment Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Aircraft Air Transportation Equipment [Member] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Series C preferred stock conversion Stock Issued During Period, Value, Conversion of Convertible Securities Receivables, net Receivables, net Receivables, net Receivables, Net, Current Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Number of engines sold Number Of Engines Sold Number Of Engines Sold CRJ-200 CRJ-200 [Member] Spare parts and supplies carrying value Spare Parts And Supplies, Net Carrying Value Spare Parts And Supplies, Net Carrying Value Adjustment to Compensation: Adjustment to Compensation [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Axis] 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 Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Inventory allowance Inventory Adjustments Gain on marketable securities, Short-term restricted investments (SESP), and long-term restricted investments (SESP) Marketable And Long-Term Restricted Investments, Gain (Loss) Marketable And Long-Term Restricted Investments, Gain (Loss) Name Measure Name 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] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Number of aircrafts in sales-type lease Sales-Type Lease, Number Of Aircrafts Sales-Type Lease, Number Of Aircrafts Series C stock redemption Payments For Redemption Of Stock Payments For Redemption Of Stock Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Schedule of Calculations of Net (Loss) Income 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 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 Depreciation, amortization and obsolescence allowance Depreciation, Depletion and Amortization Types of Commercial Aircraft [Table] Types of Commercial Aircraft [Table] Financial Advisory and Management Services Financial Advisory And Management Services [Member] Financial Advisory And Management Services [Member] Entity Address Address Line2 Entity Address, Address Line Two Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current Assets Assets, Current [Abstract] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Revenues recognized included in opening contract balance, current Contract with Customer, Liability, Revenue Recognized, Current Contract with Customer, Liability, Revenue Recognized, Current Non-PEO NEO Non-PEO NEO [Member] City of Milwaukee, Wisconsin variable rate Industrial Development Bonds Senior Notes [Member] Entity Address Address Line1 Entity Address, Address Line One Right-of-use assets acquired under operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income Tax (Benefit) Expense Income Tax Expense (Benefit) Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Other Assets Other Assets, Policy [Policy Text Block] Other Assets, Policy Principles of Consolidation Consolidation, Policy [Policy Text Block] Increase (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] Spare engines Spare Engines [Member] Spare Engines [Member] Aircraft fuel and oil Fuel Costs Net Loss Net loss Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Proceeds on disposition of property and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Exchange-traded funds Exchange Traded Funds [Member] Interest and dividend income Investment Income, Interest Short-term restricted investments (SESP) Restricted Investments, Current Weighted average common shares: Basic And Diluted Earnings Per Share Other Disclosures [Abstract] Basic and diluted earnings per share other disclosures. Financial advisory and management services payments Payment for Management Fee Schedule of Current and Non-Current Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Upfront fee received from minimum crew availability Upfront Fee Received From Minimum Crew Availability Upfront Fee Received From Minimum Crew Availability Schedule of Other Assets Schedule of Other Assets [Table Text Block] Air Wisconsin Air Wisconsin [Member] Air Wisconsin. Operating Revenues Revenues [Abstract] Investing activities Other Noncash Investing and Financing Items [Abstract] Sale of marketable securities and long-term restricted investments (SESP) Proceeds From Sale Of Acquire Marketable Securities and Long-Term Investments Proceeds From Sale Of Acquire Marketable Securities and Long-Term Investments Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]