Condensed Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 567,239	$ 530,631
Accounts receivable, net	37,467	23,246
Deferred income taxes	15,166	16,243
Prepaid expenses and other current assets	68,589	78,955
Total current assets	688,461	649,075
Property and equipment:
Flight equipment	12,397	9,847
Ground and other equipment	55,112	50,987
Less accumulated depreciation	(29,516)	(25,221)
Total property and equipment	37,993	35,613
Deposits on flight equipment purchase contracts	248,770	157,669
Aircraft maintenance deposits	185,699	161,484
Deferred heavy maintenance, net	129,021	125,288
Other long-term assets	59,906	51,636
Total assets	1,349,850	1,180,765
Current liabilities:
Accounts payable	21,842	23,104
Air traffic liability	232,072	167,627
Other current liabilities	146,624	145,262
Total current liabilities	400,538	335,993
Long-term deferred income taxes	47,443	48,916
Deferred credits and other long-term liabilities	26,258	26,739
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	520,492	515,331
Treasury stock	(3,513)	(2,291)
Retained earnings	358,625	256,070
Total shareholders’ equity	875,611	769,117
Total liabilities and shareholders’ equity	$ 1,349,850	$ 1,180,765