Supplemental Financial Information (Tables)

6 Months Ended

Jun. 30, 2022

Supplemental Financial Information [Abstract]

Summary of Allowance for Expected Credit Losses

Allowance for expected credit losses, included within Accounts receivable, is as follows:

Balance as of December 31, 2021	$	4,003
Reversal of expected credit losses		(6	)
Amounts written off and other items		(68	)
Balance as of June 30, 2022	$	3,929

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following as of:

	June 30, 2022		December 31, 2021
Salaries, wages and benefits	$	172,854	$	211,801
Maintenance		127,881		135,133
Customer maintenance reserves		96,307		87,565
Aircraft fuel		73,846		40,855
Deferred revenue		66,864		58,616
Other		116,746		108,008
Accrued liabilities	$	654,498	$	641,978

Summary of Changes in Deferred Revenue

Significant changes in Deferred Revenue liability balances during the six months ended June 30, 2022 were as follows:

Balance as of December 31, 2021	$	52,647
Revenue recognized		(224,199	)
Amounts collected or invoiced		227,535
Balance as of June 30, 2022	$	55,983

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total shown in the consolidated statements of cash flows:

	June 30, 2022		December 31, 2021
Cash and cash equivalents	$	606,567	$	910,965
Restricted cash		10,361		10,052
Total Cash, cash equivalents and restricted cash shown in    Consolidated Statements of Cash Flows	$	616,928	$	921,017