Condensed Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 540,195	$ 416,816
Accounts receivable, net	27,838	22,740
Deferred income taxes	14,512	12,591
Other current assets	79,299	95,210
Total current assets	661,844	547,357
Property and equipment:
Flight equipment	5,148	2,648
Ground and other equipment	49,567	43,580
Less accumulated depreciation	(23,202)	(17,825)
Total property and equipment	31,513	28,403
Deposits on flight equipment purchase contracts	132,483	96,692
Aircraft maintenance deposits	145,598	122,379
Deferred heavy maintenance	110,514	80,533
Other long-term assets	43,187	44,520
Total assets	1,125,139	919,884
Current liabilities:
Accounts payable	20,766	24,166
Air traffic liability	180,735	131,414
Other current liabilities	129,770	121,314
Total current liabilities	331,271	276,894
Long-term deferred income taxes	43,932	33,216
Deferred credits and other long-term liabilities	26,167	27,239
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	513,142	504,527
Treasury stock	(2,257)	(1,151)
Retained earnings	212,877	79,152
Total shareholders’ equity	723,769	582,535
Total liabilities and shareholders’ equity	$ 1,125,139	$ 919,884