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Balance Sheet Information | 9 Months Ended
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Jun. 30, 2018
Balance Sheet Information |
6. | Balance Sheet Information
Certain significant amounts included in the company’s condensed consolidated balance sheet as of June 30, 2018 and September 30, 2017, consisted of the following (in thousands):
|  | June 30, |  |  | September 30, |
|  | 2018 |  |  | 2017 |
Expendable parts and supplies, net |  |  |  |  |  |  |  |
Expendable parts and supplies |  | $ | 18,687 |  |  | $ | 17,807 |
Less obsolescence and warranty reserve |  |  | (2,971 | ) |  |  | (2,693 | )
|  | $ | 15,716 |  |  | $ | 15,114 |
Prepaid expenses and other current assets |  |  |  |  |  |  |  |
Prepaid aircraft rent |  | $ | 27,195 |  |  | $ | 53,645 |
Unutilized manufacturer credits |  |  | 3,000 |  |  |  | — |
Deferred offering and reimbursed costs |  |  | 3,992 |  |  |  | 1,863 |
Other |  |  | 5,315 |  |  |  | 6,017 |
|  | $ | 39,502 |  |  | $ | 61,525 |
Property and equipment—net |  |  |  |  |  |  |  |
Aircraft and other flight equipment substantially pledged |  | $ | 1,475,572 |  |  | $ | 1,388,990 |
Other equipment |  |  | 3,743 |  |  |  | 3,383 |
Leasehold improvements |  |  | 2,746 |  |  |  | 2,746 |
Vehicles |  |  | 692 |  |  |  | 744 |
Building |  |  | 699 |  |  |  | 699 |
Furniture and fixtures |  |  | 287 |  |  |  | 251 |
Total property and equipment |  |  | 1,483,739 |  |  |  | 1,396,813 |
Less accumulated depreciation |  |  | (244,191 | ) |  |  | (204,365 | )
|  | $ | 1,239,548 |  |  | $ | 1,192,448 |
Other accrued expenses |  |  |  |  |  |  |  |
Accrued property taxes |  | $ | 5,671 |  |  | $ | 6,484 |
Accrued interest |  |  | 7,181 |  |  |  | 4,036 |
Accrued vacation |  |  | 5,155 |  |  |  | 2,663 |
Accrued wheels, brakes and tires |  |  | 1,406 |  |  |  | 2,477 |
Other |  |  | 9,236 |  |  |  | 8,269 |
|  | $ | 28,649 |  |  | $ | 23,929 |
Depreciation expense totaled approximately $15.9 million and $47.3 million for the three and nine months ended June 30, 2018, respectively, and approximately $15.5 million and $44.9 million for the three and nine months ended June 30, 2017, respectively. The Company recorded amortization of the unfavorable lease liability for approximately $1.7 million and $5.1 million for the three and nine months ended June 30, 2018 and 2017, respectively, as a reduction to lease expense. During the three months ended June 30, 2018, the Company wrote off $1.2 million of unfavorable lease liability related to the lease termination of its aircraft lease facility with Wells Fargo Bank Northwest, National Association, as owner trustee and lessor (the “GECAS Lease Facility”), which was accounted for as lease termination 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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