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Balance Sheet Information (Tables) | 3 Months Ended
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Dec. 31, 2021
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 as of December 31, 2021 and September 30, 2021, consisted of the following (in thousands):
|  | December 31, |  |  | September 30, |
|  | 2021 |  |  | 2021 |
Expendable parts and supplies, net: |  |  |  |  |  |  |  |
Expendable parts and supplies |  | $ | 30,877 |  |  | $ | 29,297 |
Less: obsolescence and other |  |  | (5,671 | ) |  |  | (4,830 | )
|  | $ | 25,206 |  |  | $ | 24,467 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |  |
Prepaid aviation insurance |  | $ | 140 |  |  | $ | 2,171 |
Lease incentives |  |  | 1,715 |  |  |  | 1,445 |
Other |  |  | 2,633 |  |  |  | 3,269 |
|  | $ | 4,488 |  |  | $ | 6,885 |
Property and equipment, net: |  |  |  |  |  |  |  |
Aircraft and other flight equipment |  | $ | 1,637,154 |  |  | $ | 1,611,544 |
Other equipment |  |  | 4,971 |  |  |  | 4,934 |
Leasehold improvements |  |  | 2,776 |  |  |  | 2,776 |
Vehicles |  |  | 1,184 |  |  |  | 1,184 |
Building |  |  | 699 |  |  |  | 699 |
Furniture and fixtures |  |  | 292 |  |  |  | 300 |
Total property and equipment |  |  | 1,647,076 |  |  |  | 1,621,437 |
Less: accumulated depreciation |  |  | (489,154 | ) |  |  | (469,546 | )
|  | $ | 1,157,922 |  |  | $ | 1,151,891 |
Other assets: |  |  |  |  |  |  |  |
Investments in equity securities |  | $ | 19,005 |  |  | $ | 25,149 |
Lease incentives |  |  | 12,705 |  |  |  | 10,957 |
Other |  |  | 42 |  |  |  | 15 |
|  | $ | 31,752 |  |  | $ | 36,121 |
Other accrued expenses: |  |  |  |  |  |  |  |
Accrued property taxes |  | $ | 8,598 |  |  | $ | 8,783 |
Accrued interest |  |  | 4,481 |  |  |  | 2,565 |
Accrued vacation |  |  | 5,829 |  |  |  | 5,936 |
Other |  |  | 17,375 |  |  |  | 16,373 |
|  | $ | 36,283 |  |  | $ | 33,657 |
Other noncurrent liabilities: |  |  |  |  |  |  |  |
Warrant liabilities |  | $ | 22,064 |  |  | $ | 21,964 |
Lease incentive obligations |  |  | 7,289 |  |  |  | 6,358 |
Other |  |  | 4,253 |  |  |  | 6,269 |
|  | $ | 33,606 |  |  | $ | 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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