Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating revenues:    
Passenger $ 289,364 $ 278,040
Other 36,987 35,350
Total operating revenues 326,351 313,390
Operating expenses:    
Aircraft fuel 88,558 115,760
Salaries, wages and benefits 64,733 53,824
Aircraft rent 44,982 46,496
Landing fees and other rents 33,983 32,221
Sales and marketing 26,379 24,562
Aircraft maintenance 13,834 19,044
Depreciation and amortization 4,103 3,269
Other operating expenses 34,396 31,345
Total operating expenses 310,968 326,521
Operating income (loss): 15,383 (13,131)
Other income (expense):    
Interest expense-related-party (806) (9,345)
Interest expense (1,216) (570)
Capitalized interest 1,067 481
Other income (expense), net (1,318) 260
Total other expense (2,273) (9,174)
Income (loss) before income tax 13,110 (22,305)
Income tax expense 324 49
Net income (loss) $ 12,786 $ (22,354)
Net income (loss) per share:    
Basic (in dollars per share) $ 0.30 $ (31.86)
Diluted (in dollars per share) $ 0.29 $ (31.86)
Shares used for computation:    
Basic (in shares) 43,184 702
Diluted (in shares) 44,618 702