CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 126,744	$ 132,275
Marketable securities	429,806	415,273
Restricted cash	11,584	11,582
Income tax receivable	393	2,779
Receivables, net	64,702	83,099
Inventories, net	140,109	137,452
Prepaid aircraft rents	402,685	397,850
Deferred tax assets	148,054	94,385
Other current assets	34,308	16,308
Total current assets	1,358,385	1,291,003
PROPERTY AND EQUIPMENT:
Aircraft and rotable spares	5,193,614	4,608,663
Deposits on aircraft	34,822	40,000
Buildings and ground equipment	273,102	274,900
Total property and equipment, gross	5,501,538	4,923,563
Less-accumulated depreciation and amortization	(2,029,907)	(1,902,375)
Total property and equipment, net	3,471,631	3,021,188
OTHER ASSETS
Intangible assets, net	11,061	12,748
Other assets	85,366	84,989
Total other assets	96,427	97,737
Total assets	4,926,443	4,409,928
CURRENT LIABILITIES:
Current maturities of long-term debt	264,852	211,821
Accounts payable	265,807	270,097
Accrued salaries, wages and benefits	134,725	138,902
Accrued aircraft rents	2,495	3,303
Taxes other than income taxes	22,457	17,457
Other current liabilities	43,798	42,775
Total current liabilities	734,134	684,355
OTHER LONG-TERM LIABILITIES	50,052	49,625
LONG-TERM DEBT, net of current maturities	1,842,855	1,533,990
DEFERRED INCOME TAXES PAYABLE	772,710	669,385
DEFERRED AIRCRAFT CREDITS	$ 64,989	$ 72,227
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock, 5,000,000 shares authorized; none issued
Common stock, no par value, 120,000,000 shares authorized; 78,705,286 and 77,951,411 shares issued, respectively	$ 635,217	$ 626,521
Retained earnings	1,236,627	1,165,478
Treasury stock, at cost, 28,015,386 and 26,765,386 shares, respectively	(410,090)	(391,364)
Accumulated other comprehensive (loss)	(51)	(289)
Total stockholders' equity	1,461,703	1,400,346
Total liabilities and stockholders' equity	$ 4,926,443	$ 4,409,928