Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Payables and Accruals [Abstract]

Accrued liabilities included in other current liabilities

Accrued liabilities included in other current liabilities as of December 31, 2020 and 2019 consist of the following:

	As of December 31,
	2020		2019
	(in thousands)
Salaries, wages and benefits	$	112,838	$	89,163
Airport obligations	68,677		80,134
Aircraft and facility lease obligations	67,374		20,656
Interest payable	37,202		16,941
Federal excise and other passenger taxes and fees payable	36,884		65,312
Aircraft maintenance	27,466		38,099
Fuel	11,704		28,510
Other	31,469		34,706
Other current liabilities	$	393,614	$	373,521