CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 49,767	$ 203,035
Marketable securities	506,170	286,668
Restricted cash	8,235	8,216
Income tax receivable	4,307	2,871
Receivables, net	49,649	62,162
Inventories, net	142,872	140,312
Prepaid aircraft rents	171,347	195,216
Deferred tax assets	164,586	100,730
Other current assets	27,904	18,360
Total current assets	1,124,837	1,017,570
PROPERTY AND EQUIPMENT:
Aircraft and rotable spares	5,819,701	5,242,790
Deposits on aircraft	38,150	38,150
Buildings and ground equipment	254,647	275,788
Total property and equipment, gross	6,112,498	5,556,728
Less-accumulated depreciation and amortization	(2,218,391)	(2,085,981)
Total property and equipment, net	3,894,107	3,470,747
OTHER ASSETS
Intangible assets, net	8,811	10,499
Non-current prepaid aircraft rents	219,161	229,180
Other assets	52,848	53,988
Total other assets	280,820	293,667
Total assets	5,299,764	4,781,984
CURRENT LIABILITIES:
Current maturities of long-term debt	300,142	268,667
Accounts payable	248,176	279,864
Accrued salaries, wages and benefits	140,002	138,291
Accrued aircraft rents	1,519	3,226
Taxes other than income taxes	24,393	17,176
Other current liabilities	45,387	40,802
Total current liabilities	759,619	748,026
OTHER LONG TERM LIABILITIES	52,822	56,191
LONG TERM DEBT, net of current maturities	1,924,991	1,659,234
DEFERRED INCOME TAXES PAYABLE	882,352	749,575
DEFERRED AIRCRAFT CREDITS	55,866	62,523
COMMITMENTS AND CONTINGENCIES (Note 6)
STOCKHOLDERS' EQUITY:
Preferred stock, 5,000,000 shares authorized; none issued
Common stock, no par value, 120,000,000 shares authorized; 79,759,540 and 79,020,371 shares issued, respectively	657,662	641,643
Retained earnings	1,376,585	1,275,142
Treasury stock, at cost, 28,015,386 and 28,015,386 shares, respectively	(410,090)	(410,090)
Accumulated other comprehensive loss	(43)	(260)
Total stockholders' equity	1,624,114	1,506,435
Total liabilities and stockholders' equity	$ 5,299,764	$ 4,781,984