Balance Sheet Information (Tables)

12 Months Ended

Sep. 30, 2018

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 Company’s consolidated balance sheet as of September 30, 2018 and 2017, consisted of the following (in thousands):

	September 30,			September 30,
	2018			2017
Expendable parts and supplies, net
Expendable parts and supplies	$	18,907		$	17,807
Less obsolescence and other		(3,249	)		(2,693	)
	$	15,658		$	15,114
Prepaid expenses and other current assets
Prepaid aircraft rent	$	30,267		$	53,645
Unutilized manufacturer credits		4,500			—
Deferred offering and reimbursed costs		1,945			1,863
Other		4,202			6,017
	$	40,914		$	61,525
Property and equipment—net
Aircraft and other flight equipment substantially pledged	$	1,502,940		$	1,388,990
Other equipment		3,721			3,383
Leasehold improvements		2,754			2,746
Vehicles		692			744
Building		699			699
Furniture and fixtures		287			251
Total property and equipment		1,511,093			1,396,813
Less accumulated depreciation		(260,264	)		(204,365	)
	$	1,250,829		$	1,192,448
Other accrued expenses
Accrued property taxes	$	6,981		$	6,484
Accrued interest		6,118			4,036
Accrued vacation		5,470			2,663
Accrued wheels, brakes and tires		1,452			2,477
Other		9,675			8,269
	$	29,696		$	23,929