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Balance Sheet Information (Tables) | 6 Months Ended
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Mar. 31, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Summary of Certain Significant Amounts Included in Condensed Consolidated Balance Sheet | Certain significant amounts included in the condensed consolidated balance sheets consisted of the following (in thousands):
|  | March 31, |  |  | September 30, |
|  | 2022 |  |  | 2021 |
Expendable parts and supplies, net: |  |  |  |  |  |  |  |
Expendable parts and supplies |  | $ | 31,817 |  |  | $ | 29,297 |
Less: obsolescence and other |  |  | (5,562 | ) |  |  | (4,830 | )
|  | $ | 26,255 |  |  | $ | 24,467 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |  |
Prepaid aviation insurance |  | $ | 2,236 |  |  | $ | 2,171 |
Lease incentives |  |  | 1,792 |  |  |  | 1,445 |
Other |  |  | 3,580 |  |  |  | 3,269 |
|  | $ | 7,608 |  |  | $ | 6,885 |
Property and equipment, net: |  |  |  |  |  |  |  |
Aircraft and other flight equipment |  | $ | 1,507,441 |  |  | $ | 1,611,544 |
Other equipment |  |  | 5,369 |  |  |  | 4,934 |
Leasehold improvements |  |  | 2,776 |  |  |  | 2,776 |
Vehicles |  |  | 950 |  |  |  | 1,184 |
Building |  |  | 699 |  |  |  | 699 |
Furniture and fixtures |  |  | 298 |  |  |  | 300 |
Total property and equipment |  |  | 1,517,533 |  |  |  | 1,621,437 |
Less: accumulated depreciation |  |  | (453,184 | ) |  |  | (469,546 | )
|  | $ | 1,064,349 |  |  | $ | 1,151,891 |
Other assets: |  |  |  |  |  |  |  |
Investments in equity securities |  | $ | 19,904 |  |  | $ | 25,149 |
Lease incentives |  |  | 12,904 |  |  |  | 10,957 |
Other |  |  | 65 |  |  |  | 15 |
|  | $ | 32,873 |  |  | $ | 36,121 |
Other accrued expenses: |  |  |  |  |  |  |  |
Accrued property taxes |  | $ | 3,940 |  |  | $ | 8,783 |
Accrued interest |  |  | 2,546 |  |  |  | 2,565 |
Accrued vacation |  |  | 5,190 |  |  |  | 5,936 |
Other |  |  | 19,730 |  |  |  | 16,373 |
|  | $ | 31,406 |  |  | $ | 33,657 |
Other noncurrent liabilities: |  |  |  |  |  |  |  |
Warrant liabilities |  | $ | 25,225 |  |  | $ | 21,964 |
Lease incentive obligations |  |  | 6,503 |  |  |  | 6,358 |
Other |  |  | 4,666 |  |  |  | 6,269 |
|  | $ | 36,394 |  |  | $ | 34,591 |

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- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 3 -Paragraph i -Subsection 10 + Details
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