Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 414,977	$ 343,328
Accounts receivable, net	24,936	15,425
Deferred income taxes	17,982	20,738
Other current assets	81,668	63,217
Total current assets	539,563	442,708
Property and equipment:
Flight equipment	10,698	4,182
Ground and other equipment	51,365	46,608
Less accumulated depreciation	(30,127)	(27,580)
Total property and equipment	31,936	23,210
Deposits on flight equipment purchase contracts	84,291	91,450
Prepaid aircraft maintenance to lessors	117,560	120,615
Security deposits and other long-term assets	96,175	67,830
Total assets	869,525	745,813
Current liabilities:
Accounts payable	28,599	15,928
Air traffic liability	145,085	112,280
Other current liabilities	117,479	98,856
Total current liabilities	291,163	227,064
Long-term deferred income taxes	22,191	12,108
Deferred credits and other long-term liabilities	28,848	39,935
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	499,599	496,136
Treasury stock	(985)	(129)
Retained earnings (deficit)	28,702	(29,308)
Total shareholders' equity	527,323	466,706
Total liabilities and shareholders' equity	$ 869,525	$ 745,813