Balance Sheet Information

12 Months Ended

Sep. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

6.	Balance Sheet Information

Certain significant amounts included in the Company's consolidated balance sheet as of September 30, 2019 and 2018, consisted of the following (in thousands):

	September 30,			September 30,
	2019			2018
Expendable parts and supplies, net
Expendable parts and supplies	$	25,336		$	18,907
Less obsolescence and other		(3,999	)		(3,249	)
	$	21,337		$	15,658
Prepaid expenses and other current assets
Prepaid aircraft rent	$	35,786		$	30,267
Unutilized manufacturer credits		—			4,500
Deferred offering and reimbursed costs		2,092			1,945
Other		3,045			4,202
	$	40,923		$	40,914
Property and equipment—net
Aircraft and other flight equipment substantially pledged	$	1,582,199		$	1,502,940
Other equipment		5,122			3,721
Leasehold improvements		2,797			2,754
Vehicles		924			692
Building		699			699
Furniture and fixtures		302			287
Total property and equipment		1,592,043			1,511,093
Less accumulated depreciation		(318,458	)		(260,264	)
	$	1,273,585		$	1,250,829
Other accrued expenses
Accrued property taxes	$	9,186		$	6,981
Accrued interest		4,497			6,118
Accrued vacation		6,128			5,470
Accrued wheels, brakes and tires		1,513			1,452
Other		7,564			9,675
	$	28,888		$	29,696

Depreciation expense totaled $76.2 million, $64.6 million and $60.7 million for the years ended September 30, 2019, 2018 and 2017, respectively.

The Company recorded amortization of the unfavorable lease liability amounting to $5.7 million, $6.6 million and $6.8 million for the years ended September 30, 2019, 2018 and 2017, respectively, as a reduction to lease expense. During the year ended September 30, 2019 and 2018 the Company wrote off $0.8 million and $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.