Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Payables and Accruals [Abstract]

Accrued liabilities included in other current liabilities

Accrued liabilities included in other current liabilities as of December 31, 2016 and 2015 consist of the following:

	As of December 31,
	2016		2015
	(in thousands)
Salaries and wages	$	54,578	$	34,123
Airport obligations	43,989		30,849
Federal excise and other passenger taxes and fees payable	42,064		38,254
Aircraft maintenance	30,233		21,688
Fuel	14,828		7,084
Aircraft and facility lease obligations	10,378		24,014
Interest payable	8,499		12,355
Other	21,442		14,362
Other current liabilities	$	226,011	$	182,729