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Balance Sheet Information | 3 Months Ended
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Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Balance Sheet Information |
6. | Balance Sheet Information
Certain significant amounts included in the Company's condensed consolidated balance sheet as of December 31, 2018 and September 30, 2018, consisted of the following (in thousands):
|  | December 31, |  |  | September 30, |
|  | 2018 |  |  | 2018 |
Expendable parts and supplies, net |  |  |  |  |  |  |  |
Expendable parts and supplies |  | $ | 20,830 |  |  | $ | 18,907 |
Less obsolescence and other |  |  | (3,428 | ) |  |  | (3,249 | )
|  | $ | 17,402 |  |  | $ | 15,658 |
Prepaid expenses and other current assets |  |  |  |  |  |  |  |
Prepaid aircraft rent |  | $ | 33,849 |  |  | $ | 30,267 |
Unutilized manufacturer credits |  |  | 4,500 |  |  |  | 4,500 |
Deferred offering and reimbursed costs |  |  | 1,925 |  |  |  | 1,945 |
Other |  |  | 2,744 |  |  |  | 4,202 |
|  | $ | 43,018 |  |  | $ | 40,914 |
Property and equipment—net |  |  |  |  |  |  |  |
Aircraft and other flight equipment substantially pledged |  | $ | 1,516,680 |  |  | $ | 1,502,940 |
Other equipment |  |  | 3,707 |  |  |  | 3,721 |
Leasehold improvements |  |  | 2,836 |  |  |  | 2,754 |
Vehicles |  |  | 842 |  |  |  | 692 |
Building |  |  | 699 |  |  |  | 699 |
Furniture and fixtures |  |  | 287 |  |  |  | 287 |
Total property and equipment |  |  | 1,525,051 |  |  |  | 1,511,093 |
Less accumulated depreciation |  |  | (277,267 | ) |  |  | (260,264 | )
|  | $ | 1,247,784 |  |  | $ | 1,250,829 |
Other accrued expenses |  |  |  |  |  |  |  |
Accrued property taxes |  | $ | 7,272 |  |  | $ | 6,981 |
Accrued interest |  |  | 7,742 |  |  |  | 6,118 |
Accrued vacation |  |  | 5,557 |  |  |  | 5,470 |
Accrued wheels, brakes and tires |  |  | 1,459 |  |  |  | 1,452 |
Other |  |  | 8,987 |  |  |  | 9,675 |
|  | $ | 31,017 |  |  | $ | 29,696 |
Depreciation expense totaled approximately $18.0 million and $15.8 million for the three months ended December 31, 2018 and 2017, respectively. The Company recorded amortization of the unfavorable lease liability for approximately $1.5 million and $1.7 million for the three months ended December 31, 2018 and 2017, respectively, as a reduction to lease expense.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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