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Entity Tax Identification Number Entity Tax Identification Number Schedule of Equity Investments [Table] Schedule of Investments [Table] Republic Airways Holdings, Inc. Republic Airways Holdings, Inc. [Member] Republic Airways Holdings, Inc. [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Total property and equipment, at cost Total property and equipment, at cost Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Net increase (decrease) in cash and restricted cash Net increase (decrease) in cash and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Components of Special Items, Net in Condensed Consolidated Statements of Operations Restructuring and Related Costs [Table Text Block] Entity Central Index Key Entity Central Index Key Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Mainline Mainline [Member] Interest income Investment Income, Interest Measurement Frequency [Axis] Measurement Frequency [Axis] Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Debt instrument, special interest rate Debt Instrument, Special Interest Rate Debt Instrument, Special Interest Rate Other accrued liabilities Other Accrued Liabilities, Current Term Loan Term Loan [Member] Term Loan Entity [Domain] Entity [Domain] City Area Code City Area Code Variable interest rate Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate ASSETS Assets [Abstract] 2014 Revolving Facility Credit Facility 2014 [Member] Credit Facility 2014 [Member] Debt instrument, covenant terms, minimum collateral coverage ratio Debt Instrument, Covenant Terms, Minimum Collateral Coverage Ratio Debt Instrument, Covenant Terms, Minimum Collateral Coverage Ratio Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Payroll Support Program Promissory Note One, CARES Act Payroll Support Program Promissory Note One, CARES Act [Member] Payroll Support Program Promissory Note One, CARES Act Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Pacific Pacific Destination [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] AAdvantage Term Loan Facility AAdvantage Term Loan Facility [Member] AAdvantage Term Loan Facility Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Asset Class [Axis] Asset Class [Axis] Debt instrument, basis spread on variable rate, interest rate margin Debt Instrument, Basis Spread On Variable Rate, Interest Rate Margin Debt Instrument, Basis Spread On Variable Rate, Interest Rate Margin Non-cash transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Variable Rate [Axis] Variable Rate [Axis] Other liabilities Other Liabilities, Noncurrent Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] 2013 Revolving Facility Credit Facility 2013 [Member] Credit Facility 2013 Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Computation of Basic and Diluted Earnings (Loss) per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Right-of-use (ROU) assets acquired through operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Retiree Medical and Other Postretirement Benefits Other Postretirement Benefits Plan [Member] Other revenue Other Revenue [Member] Other Revenue [Member]