Condensed Consolidated Balance Sheets (in thousands, except for share amounts) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 172,204	$ 113,293
Restricted cash	20,383	21,287
Short-term investments	145,109	37,000
Accounts receivable, net	9,430	7,852
Expendable parts, supplies and fuel, net of allowance for obsolescence of $260 and $170 at June 30, 2011 and December 31, 2010, respectively	17,052	13,383
Prepaid expenses	26,126	24,071
Deferred income taxes	98
Other current assets	1,543	2,517
Total current assets	391,945	219,403
Property and equipment, net	294,329	267,298
Investment in and advances to unconsolidated affiliates, net	5,123	1,983
Deposits and other assets	10,581	12,582
Total assets	701,978	501,266
Current liabilities:
Current maturities of long term debt	6,195	16,532
Accounts payable	39,229	24,759
Accrued liabilities	18,594	23,679
Air traffic liability	141,882	101,397
Deferred income taxes	297	246
Total current liabilities	206,197	166,613
Long-term debt and other long-term liabilities:
Long term debt, net of current maturities	136,142	11,604
Deferred income taxes	31,304	25,314
Total liabilities	373,643	203,531
Stockholders' equity:
Common stock, par value $.001, 100,000,000 shares authorized; 21,542,685 and 21,455,634 shares issued; 19,051,260 and 19,005,821 shares outstanding, as of June 30, 2011 and December 31, 2010, respectively	22	21
Treasury stock, at cost, 2,491,425 and 2,449,813 shares at June 30, 2011 and December 31, 2010, respectively	(97,713)	(95,913)
Additional paid in capital	183,968	180,704
Accumulated other comprehensive income (loss)	23	(9)
Retained earnings	242,035	212,932
Total stockholders' equity	328,335	297,735
Total liabilities and stockholders' equity	$ 701,978	$ 501,266